package agent import ( "crypto/tls" "encoding/base64" "encoding/json" "errors" "fmt" "io" "net" "os" "path/filepath" "sort" "strings" "time" "github.com/hashicorp/consul/agent/consul" "github.com/hashicorp/consul/agent/structs" "github.com/hashicorp/consul/ipaddr" "github.com/hashicorp/consul/lib" "github.com/hashicorp/consul/tlsutil" "github.com/hashicorp/consul/types" "github.com/hashicorp/consul/watch" "github.com/hashicorp/go-sockaddr/template" "github.com/mitchellh/mapstructure" ) // Ports is used to simplify the configuration by // providing default ports, and allowing the addresses // to only be specified once type PortConfig struct { DNS int // DNS Query interface HTTP int // HTTP API HTTPS int // HTTPS API SerfLan int `mapstructure:"serf_lan"` // LAN gossip (Client + Server) SerfWan int `mapstructure:"serf_wan"` // WAN gossip (Server only) Server int // Server internal RPC // RPC is deprecated and is no longer used. It will be removed in a future // version. RPC int // CLI RPC } // AddressConfig is used to provide address overrides // for specific services. By default, either ClientAddress // or ServerAddress is used. type AddressConfig struct { DNS string // DNS Query interface HTTP string // HTTP API HTTPS string // HTTPS API // RPC is deprecated and is no longer used. It will be removed in a future // version. RPC string // CLI RPC } type AdvertiseAddrsConfig struct { SerfLan *net.TCPAddr `mapstructure:"-"` SerfLanRaw string `mapstructure:"serf_lan"` SerfWan *net.TCPAddr `mapstructure:"-"` SerfWanRaw string `mapstructure:"serf_wan"` RPC *net.TCPAddr `mapstructure:"-"` RPCRaw string `mapstructure:"rpc"` } // DNSConfig is used to fine tune the DNS sub-system. // It can be used to control cache values, and stale // reads type DNSConfig struct { // NodeTTL provides the TTL value for a node query NodeTTL time.Duration `mapstructure:"-"` NodeTTLRaw string `mapstructure:"node_ttl" json:"-"` // ServiceTTL provides the TTL value for a service // query for given service. The "*" wildcard can be used // to set a default for all services. ServiceTTL map[string]time.Duration `mapstructure:"-"` ServiceTTLRaw map[string]string `mapstructure:"service_ttl" json:"-"` // AllowStale is used to enable lookups with stale // data. This gives horizontal read scalability since // any Consul server can service the query instead of // only the leader. AllowStale *bool `mapstructure:"allow_stale"` // EnableTruncate is used to enable setting the truncate // flag for UDP DNS queries. This allows unmodified // clients to re-query the consul server using TCP // when the total number of records exceeds the number // returned by default for UDP. EnableTruncate bool `mapstructure:"enable_truncate"` // UDPAnswerLimit is used to limit the maximum number of DNS Resource // Records returned in the ANSWER section of a DNS response. This is // not normally useful and will be limited based on the querying // protocol, however systems that implemented §6 Rule 9 in RFC3484 // may want to set this to `1` in order to subvert §6 Rule 9 and // re-obtain the effect of randomized resource records (i.e. each // answer contains only one IP, but the IP changes every request). // RFC3484 sorts answers in a deterministic order, which defeats the // purpose of randomized DNS responses. This RFC has been obsoleted // by RFC6724 and restores the desired behavior of randomized // responses, however a large number of Linux hosts using glibc(3) // implemented §6 Rule 9 and may need this option (e.g. CentOS 5-6, // Debian Squeeze, etc). UDPAnswerLimit int `mapstructure:"udp_answer_limit"` // MaxStale is used to bound how stale of a result is // accepted for a DNS lookup. This can be used with // AllowStale to limit how old of a value is served up. // If the stale result exceeds this, another non-stale // stale read is performed. MaxStale time.Duration `mapstructure:"-"` MaxStaleRaw string `mapstructure:"max_stale" json:"-"` // OnlyPassing is used to determine whether to filter nodes // whose health checks are in any non-passing state. By // default, only nodes in a critical state are excluded. OnlyPassing bool `mapstructure:"only_passing"` // DisableCompression is used to control whether DNS responses are // compressed. In Consul 0.7 this was turned on by default and this // config was added as an opt-out. DisableCompression bool `mapstructure:"disable_compression"` // RecursorTimeout specifies the timeout in seconds // for Consul's internal dns client used for recursion. // This value is used for the connection, read and write timeout. // Default: 2s RecursorTimeout time.Duration `mapstructure:"-"` RecursorTimeoutRaw string `mapstructure:"recursor_timeout" json:"-"` } // HTTPConfig is used to fine tune the Http sub-system. type HTTPConfig struct { // BlockEndpoints is a list of endpoint prefixes to block in the // HTTP API. Any requests to these will get a 403 response. BlockEndpoints []string `mapstructure:"block_endpoints"` // ResponseHeaders are used to add HTTP header response fields to the HTTP API responses. ResponseHeaders map[string]string `mapstructure:"response_headers"` } // RetryJoinEC2 is used to configure discovery of instances via Amazon's EC2 api type RetryJoinEC2 struct { // The AWS region to look for instances in Region string `mapstructure:"region"` // The tag key and value to use when filtering instances TagKey string `mapstructure:"tag_key"` TagValue string `mapstructure:"tag_value"` // The AWS credentials to use for making requests to EC2 AccessKeyID string `mapstructure:"access_key_id" json:"-"` SecretAccessKey string `mapstructure:"secret_access_key" json:"-"` } // RetryJoinGCE is used to configure discovery of instances via Google Compute // Engine's API. type RetryJoinGCE struct { // The name of the project the instances reside in. ProjectName string `mapstructure:"project_name"` // A regular expression (RE2) pattern for the zones you want to discover the instances in. // Example: us-west1-.*, or us-(?west|east).*. ZonePattern string `mapstructure:"zone_pattern"` // The tag value to search for when filtering instances. TagValue string `mapstructure:"tag_value"` // A path to a JSON file with the service account credentials necessary to // connect to GCE. If this is not defined, the following chain is respected: // 1. A JSON file whose path is specified by the // GOOGLE_APPLICATION_CREDENTIALS environment variable. // 2. A JSON file in a location known to the gcloud command-line tool. // On Windows, this is %APPDATA%/gcloud/application_default_credentials.json. // On other systems, $HOME/.config/gcloud/application_default_credentials.json. // 3. On Google Compute Engine, it fetches credentials from the metadata // server. (In this final case any provided scopes are ignored.) CredentialsFile string `mapstructure:"credentials_file"` } // RetryJoinAzure is used to configure discovery of instances via AzureRM API type RetryJoinAzure struct { // The tag name and value to use when filtering instances TagName string `mapstructure:"tag_name"` TagValue string `mapstructure:"tag_value"` // The Azure credentials to use for making requests to AzureRM SubscriptionID string `mapstructure:"subscription_id" json:"-"` TenantID string `mapstructure:"tenant_id" json:"-"` ClientID string `mapstructure:"client_id" json:"-"` SecretAccessKey string `mapstructure:"secret_access_key" json:"-"` } // Performance is used to tune the performance of Consul's subsystems. type Performance struct { // RaftMultiplier is an integer multiplier used to scale Raft timing // parameters: HeartbeatTimeout, ElectionTimeout, and LeaderLeaseTimeout. RaftMultiplier uint `mapstructure:"raft_multiplier"` } // Telemetry is the telemetry configuration for the server type Telemetry struct { // StatsiteAddr is the address of a statsite instance. If provided, // metrics will be streamed to that instance. StatsiteAddr string `mapstructure:"statsite_address"` // StatsdAddr is the address of a statsd instance. If provided, // metrics will be sent to that instance. StatsdAddr string `mapstructure:"statsd_address"` // StatsitePrefix is the prefix used to write stats values to. By // default this is set to 'consul'. StatsitePrefix string `mapstructure:"statsite_prefix"` // DisableHostname will disable hostname prefixing for all metrics DisableHostname bool `mapstructure:"disable_hostname"` // PrefixFilter is a list of filter rules to apply for allowing/blocking metrics // by prefix. PrefixFilter []string `mapstructure:"prefix_filter"` AllowedPrefixes []string `mapstructure:"-" json:"-"` BlockedPrefixes []string `mapstructure:"-" json:"-"` // FilterDefault is the default for whether to allow a metric that's not // covered by the filter. FilterDefault *bool `mapstructure:"filter_default"` // DogStatsdAddr is the address of a dogstatsd instance. If provided, // metrics will be sent to that instance DogStatsdAddr string `mapstructure:"dogstatsd_addr"` // DogStatsdTags are the global tags that should be sent with each packet to dogstatsd // It is a list of strings, where each string looks like "my_tag_name:my_tag_value" DogStatsdTags []string `mapstructure:"dogstatsd_tags"` // Circonus: see https://github.com/circonus-labs/circonus-gometrics // for more details on the various configuration options. // Valid configuration combinations: // - CirconusAPIToken // metric management enabled (search for existing check or create a new one) // - CirconusSubmissionUrl // metric management disabled (use check with specified submission_url, // broker must be using a public SSL certificate) // - CirconusAPIToken + CirconusCheckSubmissionURL // metric management enabled (use check with specified submission_url) // - CirconusAPIToken + CirconusCheckID // metric management enabled (use check with specified id) // CirconusAPIToken is a valid API Token used to create/manage check. If provided, // metric management is enabled. // Default: none CirconusAPIToken string `mapstructure:"circonus_api_token" json:"-"` // CirconusAPIApp is an app name associated with API token. // Default: "consul" CirconusAPIApp string `mapstructure:"circonus_api_app"` // CirconusAPIURL is the base URL to use for contacting the Circonus API. // Default: "https://api.circonus.com/v2" CirconusAPIURL string `mapstructure:"circonus_api_url"` // CirconusSubmissionInterval is the interval at which metrics are submitted to Circonus. // Default: 10s CirconusSubmissionInterval string `mapstructure:"circonus_submission_interval"` // CirconusCheckSubmissionURL is the check.config.submission_url field from a // previously created HTTPTRAP check. // Default: none CirconusCheckSubmissionURL string `mapstructure:"circonus_submission_url"` // CirconusCheckID is the check id (not check bundle id) from a previously created // HTTPTRAP check. The numeric portion of the check._cid field. // Default: none CirconusCheckID string `mapstructure:"circonus_check_id"` // CirconusCheckForceMetricActivation will force enabling metrics, as they are encountered, // if the metric already exists and is NOT active. If check management is enabled, the default // behavior is to add new metrics as they are encoutered. If the metric already exists in the // check, it will *NOT* be activated. This setting overrides that behavior. // Default: "false" CirconusCheckForceMetricActivation string `mapstructure:"circonus_check_force_metric_activation"` // CirconusCheckInstanceID serves to uniquely identify the metrics coming from this "instance". // It can be used to maintain metric continuity with transient or ephemeral instances as // they move around within an infrastructure. // Default: hostname:app CirconusCheckInstanceID string `mapstructure:"circonus_check_instance_id"` // CirconusCheckSearchTag is a special tag which, when coupled with the instance id, helps to // narrow down the search results when neither a Submission URL or Check ID is provided. // Default: service:app (e.g. service:consul) CirconusCheckSearchTag string `mapstructure:"circonus_check_search_tag"` // CirconusCheckTags is a comma separated list of tags to apply to the check. Note that // the value of CirconusCheckSearchTag will always be added to the check. // Default: none CirconusCheckTags string `mapstructure:"circonus_check_tags"` // CirconusCheckDisplayName is the name for the check which will be displayed in the Circonus UI. // Default: value of CirconusCheckInstanceID CirconusCheckDisplayName string `mapstructure:"circonus_check_display_name"` // CirconusBrokerID is an explicit broker to use when creating a new check. The numeric portion // of broker._cid. If metric management is enabled and neither a Submission URL nor Check ID // is provided, an attempt will be made to search for an existing check using Instance ID and // Search Tag. If one is not found, a new HTTPTRAP check will be created. // Default: use Select Tag if provided, otherwise, a random Enterprise Broker associated // with the specified API token or the default Circonus Broker. // Default: none CirconusBrokerID string `mapstructure:"circonus_broker_id"` // CirconusBrokerSelectTag is a special tag which will be used to select a broker when // a Broker ID is not provided. The best use of this is to as a hint for which broker // should be used based on *where* this particular instance is running. // (e.g. a specific geo location or datacenter, dc:sfo) // Default: none CirconusBrokerSelectTag string `mapstructure:"circonus_broker_select_tag"` } // Autopilot is used to configure helpful features for operating Consul servers. type Autopilot struct { // CleanupDeadServers enables the automatic cleanup of dead servers when new ones // are added to the peer list. Defaults to true. CleanupDeadServers *bool `mapstructure:"cleanup_dead_servers"` // LastContactThreshold is the limit on the amount of time a server can go // without leader contact before being considered unhealthy. LastContactThreshold *time.Duration `mapstructure:"-" json:"-"` LastContactThresholdRaw string `mapstructure:"last_contact_threshold"` // MaxTrailingLogs is the amount of entries in the Raft Log that a server can // be behind before being considered unhealthy. MaxTrailingLogs *uint64 `mapstructure:"max_trailing_logs"` // ServerStabilizationTime is the minimum amount of time a server must be // in a stable, healthy state before it can be added to the cluster. Only // applicable with Raft protocol version 3 or higher. ServerStabilizationTime *time.Duration `mapstructure:"-" json:"-"` ServerStabilizationTimeRaw string `mapstructure:"server_stabilization_time"` // (Enterprise-only) RedundancyZoneTag is the Meta tag to use for separating servers // into zones for redundancy. If left blank, this feature will be disabled. RedundancyZoneTag string `mapstructure:"redundancy_zone_tag"` // (Enterprise-only) DisableUpgradeMigration will disable Autopilot's upgrade migration // strategy of waiting until enough newer-versioned servers have been added to the // cluster before promoting them to voters. DisableUpgradeMigration *bool `mapstructure:"disable_upgrade_migration"` // (Enterprise-only) UpgradeVersionTag is the node tag to use for version info when // performing upgrade migrations. If left blank, the Consul version will be used. UpgradeVersionTag string `mapstructure:"upgrade_version_tag"` } // Config is the configuration that can be set for an Agent. // Some of this is configurable as CLI flags, but most must // be set using a configuration file. type Config struct { // DevMode enables a fast-path mode of operation to bring up an in-memory // server with minimal configuration. Useful for developing Consul. DevMode bool `mapstructure:"-"` // Performance is used to tune the performance of Consul's subsystems. Performance Performance `mapstructure:"performance"` // Bootstrap is used to bring up the first Consul server, and // permits that node to elect itself leader Bootstrap bool `mapstructure:"bootstrap"` // BootstrapExpect tries to automatically bootstrap the Consul cluster, // by withholding peers until enough servers join. BootstrapExpect int `mapstructure:"bootstrap_expect"` // Server controls if this agent acts like a Consul server, // or merely as a client. Servers have more state, take part // in leader election, etc. Server bool `mapstructure:"server"` // (Enterprise-only) NonVotingServer is whether this server will act as a non-voting member // of the cluster to help provide read scalability. NonVotingServer bool `mapstructure:"non_voting_server"` // Datacenter is the datacenter this node is in. Defaults to dc1 Datacenter string `mapstructure:"datacenter"` // DataDir is the directory to store our state in DataDir string `mapstructure:"data_dir"` // DNSRecursors can be set to allow the DNS servers to recursively // resolve non-consul domains. It is deprecated, and merges into the // recursors array. DNSRecursor string `mapstructure:"recursor"` // DNSRecursors can be set to allow the DNS servers to recursively // resolve non-consul domains DNSRecursors []string `mapstructure:"recursors"` // DNS configuration DNSConfig DNSConfig `mapstructure:"dns_config"` // Domain is the DNS domain for the records. Defaults to "consul." Domain string `mapstructure:"domain"` // HTTP configuration HTTPConfig HTTPConfig `mapstructure:"http_config"` // Encryption key to use for the Serf communication EncryptKey string `mapstructure:"encrypt" json:"-"` // Disables writing the keyring to a file. DisableKeyringFile bool `mapstructure:"disable_keyring_file"` // EncryptVerifyIncoming and EncryptVerifyOutgoing are used to enforce // incoming/outgoing gossip encryption and can be used to upshift to // encrypted gossip on a running cluster. EncryptVerifyIncoming *bool `mapstructure:"encrypt_verify_incoming"` EncryptVerifyOutgoing *bool `mapstructure:"encrypt_verify_outgoing"` // LogLevel is the level of the logs to putout LogLevel string `mapstructure:"log_level"` // Node ID is a unique ID for this node across space and time. Defaults // to a randomly-generated ID that persists in the data-dir. NodeID types.NodeID `mapstructure:"node_id"` // DisableHostNodeID will prevent Consul from using information from the // host to generate a node ID, and will cause Consul to generate a // random ID instead. DisableHostNodeID *bool `mapstructure:"disable_host_node_id"` // Node name is the name we use to advertise. Defaults to hostname. NodeName string `mapstructure:"node_name"` // ClientAddr is used to control the address we bind to for // client services (DNS, HTTP, HTTPS, RPC) ClientAddr string `mapstructure:"client_addr"` // BindAddr is used to control the address we bind to. // If not specified, the first private IP we find is used. // This controls the address we use for cluster facing // services (Gossip, Server RPC) BindAddr string `mapstructure:"bind_addr"` // SerfWanBindAddr is used to control the address we bind to. // If not specified, the first private IP we find is used. // This controls the address we use for cluster facing // services (Gossip) Serf SerfWanBindAddr string `mapstructure:"serf_wan_bind"` // SerfLanBindAddr is used to control the address we bind to. // If not specified, the first private IP we find is used. // This controls the address we use for cluster facing // services (Gossip) Serf SerfLanBindAddr string `mapstructure:"serf_lan_bind"` // AdvertiseAddr is the address we use for advertising our Serf, // and Consul RPC IP. If not specified, bind address is used. AdvertiseAddr string `mapstructure:"advertise_addr"` // AdvertiseAddrs configuration AdvertiseAddrs AdvertiseAddrsConfig `mapstructure:"advertise_addrs"` // AdvertiseAddrWan is the address we use for advertising our // Serf WAN IP. If not specified, the general advertise address is used. AdvertiseAddrWan string `mapstructure:"advertise_addr_wan"` // TranslateWanAddrs controls whether or not Consul should prefer // the "wan" tagged address when doing lookups in remote datacenters. // See TaggedAddresses below for more details. TranslateWanAddrs bool `mapstructure:"translate_wan_addrs"` // Port configurations Ports PortConfig // Address configurations Addresses AddressConfig // Tagged addresses. These are used to publish a set of addresses for // for a node, which can be used by the remote agent. We currently // populate only the "wan" tag based on the SerfWan advertise address, // but this structure is here for possible future features with other // user-defined tags. The "wan" tag will be used by remote agents if // they are configured with TranslateWanAddrs set to true. TaggedAddresses map[string]string // Node metadata key/value pairs. These are excluded from JSON output // because they can be reloaded and might be stale when shown from the // config instead of the local state. Meta map[string]string `mapstructure:"node_meta" json:"-"` // LeaveOnTerm controls if Serf does a graceful leave when receiving // the TERM signal. Defaults true on clients, false on servers. This can // be changed on reload. LeaveOnTerm *bool `mapstructure:"leave_on_terminate"` // SkipLeaveOnInt controls if Serf skips a graceful leave when // receiving the INT signal. Defaults false on clients, true on // servers. This can be changed on reload. SkipLeaveOnInt *bool `mapstructure:"skip_leave_on_interrupt"` // Autopilot is used to configure helpful features for operating Consul servers. Autopilot Autopilot `mapstructure:"autopilot"` Telemetry Telemetry `mapstructure:"telemetry"` // Protocol is the Consul protocol version to use. Protocol int `mapstructure:"protocol"` // RaftProtocol sets the Raft protocol version to use on this server. RaftProtocol int `mapstructure:"raft_protocol"` // EnableDebug is used to enable various debugging features EnableDebug bool `mapstructure:"enable_debug"` // VerifyIncoming is used to verify the authenticity of incoming connections. // This means that TCP requests are forbidden, only allowing for TLS. TLS connections // must match a provided certificate authority. This can be used to force client auth. VerifyIncoming bool `mapstructure:"verify_incoming"` // VerifyIncomingRPC is used to verify the authenticity of incoming RPC connections. // This means that TCP requests are forbidden, only allowing for TLS. TLS connections // must match a provided certificate authority. This can be used to force client auth. VerifyIncomingRPC bool `mapstructure:"verify_incoming_rpc"` // VerifyIncomingHTTPS is used to verify the authenticity of incoming HTTPS connections. // This means that TCP requests are forbidden, only allowing for TLS. TLS connections // must match a provided certificate authority. This can be used to force client auth. VerifyIncomingHTTPS bool `mapstructure:"verify_incoming_https"` // VerifyOutgoing is used to verify the authenticity of outgoing connections. // This means that TLS requests are used. TLS connections must match a provided // certificate authority. This is used to verify authenticity of server nodes. VerifyOutgoing bool `mapstructure:"verify_outgoing"` // VerifyServerHostname is used to enable hostname verification of servers. This // ensures that the certificate presented is valid for server... // This prevents a compromised client from being restarted as a server, and then // intercepting request traffic as well as being added as a raft peer. This should be // enabled by default with VerifyOutgoing, but for legacy reasons we cannot break // existing clients. VerifyServerHostname bool `mapstructure:"verify_server_hostname"` // CAFile is a path to a certificate authority file. This is used with VerifyIncoming // or VerifyOutgoing to verify the TLS connection. CAFile string `mapstructure:"ca_file"` // CAPath is a path to a directory of certificate authority files. This is used with // VerifyIncoming or VerifyOutgoing to verify the TLS connection. CAPath string `mapstructure:"ca_path"` // CertFile is used to provide a TLS certificate that is used for serving TLS connections. // Must be provided to serve TLS connections. CertFile string `mapstructure:"cert_file"` // KeyFile is used to provide a TLS key that is used for serving TLS connections. // Must be provided to serve TLS connections. KeyFile string `mapstructure:"key_file"` // ServerName is used with the TLS certificates to ensure the name we // provide matches the certificate ServerName string `mapstructure:"server_name"` // TLSMinVersion is used to set the minimum TLS version used for TLS connections. TLSMinVersion string `mapstructure:"tls_min_version"` // TLSCipherSuites is used to specify the list of supported ciphersuites. TLSCipherSuites []uint16 `mapstructure:"-" json:"-"` TLSCipherSuitesRaw string `mapstructure:"tls_cipher_suites"` // TLSPreferServerCipherSuites specifies whether to prefer the server's ciphersuite // over the client ciphersuites. TLSPreferServerCipherSuites bool `mapstructure:"tls_prefer_server_cipher_suites"` // StartJoin is a list of addresses to attempt to join when the // agent starts. If Serf is unable to communicate with any of these // addresses, then the agent will error and exit. StartJoin []string `mapstructure:"start_join"` // StartJoinWan is a list of addresses to attempt to join -wan when the // agent starts. If Serf is unable to communicate with any of these // addresses, then the agent will error and exit. StartJoinWan []string `mapstructure:"start_join_wan"` // RetryJoin is a list of addresses to join with retry enabled. RetryJoin []string `mapstructure:"retry_join" json:"-"` // RetryMaxAttempts specifies the maximum number of times to retry joining a // host on startup. This is useful for cases where we know the node will be // online eventually. RetryMaxAttempts int `mapstructure:"retry_max"` // RetryInterval specifies the amount of time to wait in between join // attempts on agent start. The minimum allowed value is 1 second and // the default is 30s. RetryInterval time.Duration `mapstructure:"-" json:"-"` RetryIntervalRaw string `mapstructure:"retry_interval"` // RetryJoinWan is a list of addresses to join -wan with retry enabled. RetryJoinWan []string `mapstructure:"retry_join_wan"` // RetryMaxAttemptsWan specifies the maximum number of times to retry joining a // -wan host on startup. This is useful for cases where we know the node will be // online eventually. RetryMaxAttemptsWan int `mapstructure:"retry_max_wan"` // RetryIntervalWan specifies the amount of time to wait in between join // -wan attempts on agent start. The minimum allowed value is 1 second and // the default is 30s. RetryIntervalWan time.Duration `mapstructure:"-" json:"-"` RetryIntervalWanRaw string `mapstructure:"retry_interval_wan"` // ReconnectTimeout* specify the amount of time to wait to reconnect with // another agent before deciding it's permanently gone. This can be used to // control the time it takes to reap failed nodes from the cluster. ReconnectTimeoutLan time.Duration `mapstructure:"-"` ReconnectTimeoutLanRaw string `mapstructure:"reconnect_timeout"` ReconnectTimeoutWan time.Duration `mapstructure:"-"` ReconnectTimeoutWanRaw string `mapstructure:"reconnect_timeout_wan"` // EnableUI enables the statically-compiled assets for the Consul web UI and // serves them at the default /ui/ endpoint automatically. EnableUI bool `mapstructure:"ui"` // UIDir is the directory containing the Web UI resources. // If provided, the UI endpoints will be enabled. UIDir string `mapstructure:"ui_dir"` // PidFile is the file to store our PID in PidFile string `mapstructure:"pid_file"` // EnableSyslog is used to also tee all the logs over to syslog. Only supported // on linux and OSX. Other platforms will generate an error. EnableSyslog bool `mapstructure:"enable_syslog"` // SyslogFacility is used to control where the syslog messages go // By default, goes to LOCAL0 SyslogFacility string `mapstructure:"syslog_facility"` // RejoinAfterLeave controls our interaction with the cluster after leave. // When set to false (default), a leave causes Consul to not rejoin // the cluster until an explicit join is received. If this is set to // true, we ignore the leave, and rejoin the cluster on start. RejoinAfterLeave bool `mapstructure:"rejoin_after_leave"` // EnableScriptChecks controls whether health checks which execute // scripts are enabled. This includes regular script checks and Docker // checks. EnableScriptChecks bool `mapstructure:"enable_script_checks"` // CheckUpdateInterval controls the interval on which the output of a health check // is updated if there is no change to the state. For example, a check in a steady // state may run every 5 second generating a unique output (timestamp, etc), forcing // constant writes. This allows Consul to defer the write for some period of time, // reducing the write pressure when the state is steady. CheckUpdateInterval time.Duration `mapstructure:"-"` CheckUpdateIntervalRaw string `mapstructure:"check_update_interval" json:"-"` // CheckReapInterval controls the interval on which we will look for // failed checks and reap their associated services, if so configured. CheckReapInterval time.Duration `mapstructure:"-"` // CheckDeregisterIntervalMin is the smallest allowed interval to set // a check's DeregisterCriticalServiceAfter value to. CheckDeregisterIntervalMin time.Duration `mapstructure:"-"` // ACLToken is the default token used to make requests if a per-request // token is not provided. If not configured the 'anonymous' token is used. ACLToken string `mapstructure:"acl_token" json:"-"` // ACLAgentMasterToken is a special token that has full read and write // privileges for this agent, and can be used to call agent endpoints // when no servers are available. ACLAgentMasterToken string `mapstructure:"acl_agent_master_token" json:"-"` // ACLAgentToken is the default token used to make requests for the agent // itself, such as for registering itself with the catalog. If not // configured, the 'acl_token' will be used. ACLAgentToken string `mapstructure:"acl_agent_token" json:"-"` // ACLMasterToken is used to bootstrap the ACL system. It should be specified // on the servers in the ACLDatacenter. When the leader comes online, it ensures // that the Master token is available. This provides the initial token. ACLMasterToken string `mapstructure:"acl_master_token" json:"-"` // ACLDatacenter is the central datacenter that holds authoritative // ACL records. This must be the same for the entire cluster. // If this is not set, ACLs are not enabled. Off by default. ACLDatacenter string `mapstructure:"acl_datacenter"` // ACLTTL is used to control the time-to-live of cached ACLs . This has // a major impact on performance. By default, it is set to 30 seconds. ACLTTL time.Duration `mapstructure:"-"` ACLTTLRaw string `mapstructure:"acl_ttl"` // ACLDefaultPolicy is used to control the ACL interaction when // there is no defined policy. This can be "allow" which means // ACLs are used to black-list, or "deny" which means ACLs are // white-lists. ACLDefaultPolicy string `mapstructure:"acl_default_policy"` // ACLDisabledTTL is used by clients to determine how long they will // wait to check again with the servers if they discover ACLs are not // enabled. ACLDisabledTTL time.Duration `mapstructure:"-"` // ACLDownPolicy is used to control the ACL interaction when we cannot // reach the ACLDatacenter and the token is not in the cache. // There are two modes: // * allow - Allow all requests // * deny - Deny all requests // * extend-cache - Ignore the cache expiration, and allow cached // ACL's to be used to service requests. This // is the default. If the ACL is not in the cache, // this acts like deny. ACLDownPolicy string `mapstructure:"acl_down_policy"` // EnableACLReplication is used to turn on ACL replication when using // /v1/agent/token/acl_replication_token to introduce the token, instead // of setting acl_replication_token in the config. Setting the token via // config will also set this to true for backward compatibility. EnableACLReplication bool `mapstructure:"enable_acl_replication"` // ACLReplicationToken is used to fetch ACLs from the ACLDatacenter in // order to replicate them locally. Setting this to a non-empty value // also enables replication. Replication is only available in datacenters // other than the ACLDatacenter. ACLReplicationToken string `mapstructure:"acl_replication_token" json:"-"` // ACLEnforceVersion8 is used to gate a set of ACL policy features that // are opt-in prior to Consul 0.8 and opt-out in Consul 0.8 and later. ACLEnforceVersion8 *bool `mapstructure:"acl_enforce_version_8"` // Watches are used to monitor various endpoints and to invoke a // handler to act appropriately. These are managed entirely in the // agent layer using the standard APIs. Watches []map[string]interface{} `mapstructure:"watches"` // DisableRemoteExec is used to turn off the remote execution // feature. This is for security to prevent unknown scripts from running. DisableRemoteExec *bool `mapstructure:"disable_remote_exec"` // DisableUpdateCheck is used to turn off the automatic update and // security bulletin checking. DisableUpdateCheck bool `mapstructure:"disable_update_check"` // DisableAnonymousSignature is used to turn off the anonymous signature // send with the update check. This is used to deduplicate messages. DisableAnonymousSignature bool `mapstructure:"disable_anonymous_signature"` // AEInterval controls the anti-entropy interval. This is how often // the agent attempts to reconcile its local state with the server's // representation of our state. Defaults to every 60s. AEInterval time.Duration `mapstructure:"-" json:"-"` // DisableCoordinates controls features related to network coordinates. DisableCoordinates bool `mapstructure:"disable_coordinates"` // SyncCoordinateRateTarget controls the rate for sending network // coordinates to the server, in updates per second. This is the max rate // that the server supports, so we scale our interval based on the size // of the cluster to try to achieve this in aggregate at the server. SyncCoordinateRateTarget float64 `mapstructure:"-" json:"-"` // SyncCoordinateIntervalMin sets the minimum interval that coordinates // will be sent to the server. We scale the interval based on the cluster // size, but below a certain interval it doesn't make sense send them any // faster. SyncCoordinateIntervalMin time.Duration `mapstructure:"-" json:"-"` // Checks holds the provided check definitions Checks []*structs.CheckDefinition `mapstructure:"-" json:"-"` // Services holds the provided service definitions Services []*structs.ServiceDefinition `mapstructure:"-" json:"-"` // ConsulConfig can either be provided or a default one created ConsulConfig *consul.Config `mapstructure:"-" json:"-"` // Revision is the GitCommit this maps to Revision string `mapstructure:"-"` // Version is the release version number Version string `mapstructure:"-"` // VersionPrerelease is a label for pre-release builds VersionPrerelease string `mapstructure:"-"` // WatchPlans contains the compiled watches WatchPlans []*watch.Plan `mapstructure:"-" json:"-"` // UnixSockets is a map of socket configuration data UnixSockets UnixSocketConfig `mapstructure:"unix_sockets"` // Minimum Session TTL SessionTTLMin time.Duration `mapstructure:"-"` SessionTTLMinRaw string `mapstructure:"session_ttl_min"` // deprecated fields // keep them exported since otherwise the error messages don't show up DeprecatedAtlasInfrastructure string `mapstructure:"atlas_infrastructure" json:"-"` DeprecatedAtlasToken string `mapstructure:"atlas_token" json:"-"` DeprecatedAtlasACLToken string `mapstructure:"atlas_acl_token" json:"-"` DeprecatedAtlasJoin bool `mapstructure:"atlas_join" json:"-"` DeprecatedAtlasEndpoint string `mapstructure:"atlas_endpoint" json:"-"` DeprecatedHTTPAPIResponseHeaders map[string]string `mapstructure:"http_api_response_headers"` DeprecatedRetryJoinEC2 RetryJoinEC2 `mapstructure:"retry_join_ec2"` DeprecatedRetryJoinGCE RetryJoinGCE `mapstructure:"retry_join_gce"` DeprecatedRetryJoinAzure RetryJoinAzure `mapstructure:"retry_join_azure"` } // IncomingHTTPSConfig returns the TLS configuration for HTTPS // connections to consul. func (c *Config) IncomingHTTPSConfig() (*tls.Config, error) { tc := &tlsutil.Config{ VerifyIncoming: c.VerifyIncoming || c.VerifyIncomingHTTPS, VerifyOutgoing: c.VerifyOutgoing, CAFile: c.CAFile, CAPath: c.CAPath, CertFile: c.CertFile, KeyFile: c.KeyFile, NodeName: c.NodeName, ServerName: c.ServerName, TLSMinVersion: c.TLSMinVersion, CipherSuites: c.TLSCipherSuites, PreferServerCipherSuites: c.TLSPreferServerCipherSuites, } return tc.IncomingTLSConfig() } type ProtoAddr struct { Proto, Net, Addr string } func (p ProtoAddr) String() string { return p.Proto + "://" + p.Addr } func (c *Config) DNSAddrs() ([]ProtoAddr, error) { if c.Ports.DNS <= 0 { return nil, nil } a, err := c.ClientListener(c.Addresses.DNS, c.Ports.DNS) if err != nil { return nil, err } addrs := []ProtoAddr{ {"dns", "tcp", a.String()}, {"dns", "udp", a.String()}, } return addrs, nil } // HTTPAddrs returns the bind addresses for the HTTP server and // the application protocol which should be served, e.g. 'http' // or 'https'. func (c *Config) HTTPAddrs() ([]ProtoAddr, error) { var addrs []ProtoAddr if c.Ports.HTTP > 0 { a, err := c.ClientListener(c.Addresses.HTTP, c.Ports.HTTP) if err != nil { return nil, err } addrs = append(addrs, ProtoAddr{"http", a.Network(), a.String()}) } if c.Ports.HTTPS > 0 && c.CertFile != "" && c.KeyFile != "" { a, err := c.ClientListener(c.Addresses.HTTPS, c.Ports.HTTPS) if err != nil { return nil, err } addrs = append(addrs, ProtoAddr{"https", a.Network(), a.String()}) } return addrs, nil } // Bool is used to initialize bool pointers in struct literals. func Bool(b bool) *bool { return &b } // Uint64 is used to initialize uint64 pointers in struct literals. func Uint64(i uint64) *uint64 { return &i } // Duration is used to initialize time.Duration pointers in struct literals. func Duration(d time.Duration) *time.Duration { return &d } // UnixSocketPermissions contains information about a unix socket, and // implements the FilePermissions interface. type UnixSocketPermissions struct { Usr string `mapstructure:"user"` Grp string `mapstructure:"group"` Perms string `mapstructure:"mode"` } func (u UnixSocketPermissions) User() string { return u.Usr } func (u UnixSocketPermissions) Group() string { return u.Grp } func (u UnixSocketPermissions) Mode() string { return u.Perms } func (s *Telemetry) GoString() string { return fmt.Sprintf("*%#v", *s) } // UnixSocketConfig stores information about various unix sockets which // Consul creates and uses for communication. type UnixSocketConfig struct { UnixSocketPermissions `mapstructure:",squash"` } // socketPath tests if a given address describes a domain socket, // and returns the relevant path part of the string if it is. func socketPath(addr string) string { if !strings.HasPrefix(addr, "unix://") { return "" } return strings.TrimPrefix(addr, "unix://") } type dirEnts []os.FileInfo // DefaultConfig is used to return a sane default configuration func DefaultConfig() *Config { return &Config{ Bootstrap: false, BootstrapExpect: 0, Server: false, Datacenter: consul.DefaultDC, Domain: "consul.", LogLevel: "INFO", ClientAddr: "127.0.0.1", BindAddr: "0.0.0.0", Ports: PortConfig{ DNS: 8600, HTTP: 8500, HTTPS: -1, SerfLan: consul.DefaultLANSerfPort, SerfWan: consul.DefaultWANSerfPort, Server: 8300, }, DNSConfig: DNSConfig{ AllowStale: Bool(true), UDPAnswerLimit: 3, MaxStale: 10 * 365 * 24 * time.Hour, RecursorTimeout: 2 * time.Second, }, Telemetry: Telemetry{ StatsitePrefix: "consul", FilterDefault: Bool(true), }, Meta: make(map[string]string), SyslogFacility: "LOCAL0", Protocol: consul.ProtocolVersion2Compatible, CheckUpdateInterval: 5 * time.Minute, CheckDeregisterIntervalMin: time.Minute, CheckReapInterval: 30 * time.Second, AEInterval: time.Minute, DisableCoordinates: false, // SyncCoordinateRateTarget is set based on the rate that we want // the server to handle as an aggregate across the entire cluster. // If you update this, you'll need to adjust CoordinateUpdate* in // the server-side config accordingly. SyncCoordinateRateTarget: 64.0, // updates / second SyncCoordinateIntervalMin: 15 * time.Second, ACLTTL: 30 * time.Second, ACLDownPolicy: "extend-cache", ACLDefaultPolicy: "allow", ACLDisabledTTL: 120 * time.Second, ACLEnforceVersion8: Bool(true), DisableRemoteExec: Bool(true), RetryInterval: 30 * time.Second, RetryIntervalWan: 30 * time.Second, TLSMinVersion: "tls10", EncryptVerifyIncoming: Bool(true), EncryptVerifyOutgoing: Bool(true), DisableHostNodeID: Bool(true), } } // DevConfig is used to return a set of configuration to use for dev mode. func DevConfig() *Config { conf := DefaultConfig() conf.DevMode = true conf.LogLevel = "DEBUG" conf.Server = true conf.EnableDebug = true conf.DisableAnonymousSignature = true conf.EnableUI = true conf.BindAddr = "127.0.0.1" conf.DisableKeyringFile = true conf.ConsulConfig = consul.DefaultConfig() conf.ConsulConfig.SerfLANConfig.MemberlistConfig.ProbeTimeout = 100 * time.Millisecond conf.ConsulConfig.SerfLANConfig.MemberlistConfig.ProbeInterval = 100 * time.Millisecond conf.ConsulConfig.SerfLANConfig.MemberlistConfig.GossipInterval = 100 * time.Millisecond conf.ConsulConfig.SerfWANConfig.MemberlistConfig.SuspicionMult = 3 conf.ConsulConfig.SerfWANConfig.MemberlistConfig.ProbeTimeout = 100 * time.Millisecond conf.ConsulConfig.SerfWANConfig.MemberlistConfig.ProbeInterval = 100 * time.Millisecond conf.ConsulConfig.SerfWANConfig.MemberlistConfig.GossipInterval = 100 * time.Millisecond conf.ConsulConfig.RaftConfig.LeaderLeaseTimeout = 20 * time.Millisecond conf.ConsulConfig.RaftConfig.HeartbeatTimeout = 40 * time.Millisecond conf.ConsulConfig.RaftConfig.ElectionTimeout = 40 * time.Millisecond conf.ConsulConfig.CoordinateUpdatePeriod = 100 * time.Millisecond return conf } // EncryptBytes returns the encryption key configured. func (c *Config) EncryptBytes() ([]byte, error) { return base64.StdEncoding.DecodeString(c.EncryptKey) } // ClientListener is used to format a listener for a // port on a ClientAddr func (c *Config) ClientListener(override string, port int) (net.Addr, error) { addr := c.ClientAddr if override != "" { addr = override } if path := socketPath(addr); path != "" { return &net.UnixAddr{Name: path, Net: "unix"}, nil } ip := net.ParseIP(addr) if ip == nil { return nil, fmt.Errorf("Failed to parse IP: %v", addr) } return &net.TCPAddr{IP: ip, Port: port}, nil } // VerifyUniqueListeners checks to see if an address was used more than once in // the config func (c *Config) VerifyUniqueListeners() error { listeners := []struct { host string port int descr string }{ {c.Addresses.DNS, c.Ports.DNS, "DNS"}, {c.Addresses.HTTP, c.Ports.HTTP, "HTTP"}, {c.Addresses.HTTPS, c.Ports.HTTPS, "HTTPS"}, {c.AdvertiseAddr, c.Ports.Server, "Server RPC"}, {c.AdvertiseAddr, c.Ports.SerfLan, "Serf LAN"}, {c.AdvertiseAddr, c.Ports.SerfWan, "Serf WAN"}, } type key struct { host string port int } m := make(map[key]string, len(listeners)) for _, l := range listeners { if l.host == "" { l.host = "0.0.0.0" } else if strings.HasPrefix(l.host, "unix") { // Don't compare ports on unix sockets l.port = 0 } if l.host == "0.0.0.0" && l.port <= 0 { continue } k := key{l.host, l.port} v, ok := m[k] if ok { return fmt.Errorf("%s address already configured for %s", l.descr, v) } m[k] = l.descr } return nil } // DecodeConfig reads the configuration from the given reader in JSON // format and decodes it into a proper Config structure. func DecodeConfig(r io.Reader) (*Config, error) { var raw interface{} if err := json.NewDecoder(r).Decode(&raw); err != nil { return nil, err } // Check the result type var result Config if obj, ok := raw.(map[string]interface{}); ok { // Check for a "services", "service" or "check" key, meaning // this is actually a definition entry if sub, ok := obj["services"]; ok { if list, ok := sub.([]interface{}); ok { for _, srv := range list { service, err := DecodeServiceDefinition(srv) if err != nil { return nil, err } result.Services = append(result.Services, service) } } } if sub, ok := obj["service"]; ok { service, err := DecodeServiceDefinition(sub) if err != nil { return nil, err } result.Services = append(result.Services, service) } if sub, ok := obj["checks"]; ok { if list, ok := sub.([]interface{}); ok { for _, chk := range list { check, err := DecodeCheckDefinition(chk) if err != nil { return nil, err } result.Checks = append(result.Checks, check) } } } if sub, ok := obj["check"]; ok { check, err := DecodeCheckDefinition(sub) if err != nil { return nil, err } result.Checks = append(result.Checks, check) } // A little hacky but upgrades the old stats config directives to the new way if sub, ok := obj["statsd_addr"]; ok && result.Telemetry.StatsdAddr == "" { result.Telemetry.StatsdAddr = sub.(string) } if sub, ok := obj["statsite_addr"]; ok && result.Telemetry.StatsiteAddr == "" { result.Telemetry.StatsiteAddr = sub.(string) } if sub, ok := obj["statsite_prefix"]; ok && result.Telemetry.StatsitePrefix == "" { result.Telemetry.StatsitePrefix = sub.(string) } if sub, ok := obj["dogstatsd_addr"]; ok && result.Telemetry.DogStatsdAddr == "" { result.Telemetry.DogStatsdAddr = sub.(string) } if sub, ok := obj["dogstatsd_tags"].([]interface{}); ok && len(result.Telemetry.DogStatsdTags) == 0 { result.Telemetry.DogStatsdTags = make([]string, len(sub)) for i := range sub { result.Telemetry.DogStatsdTags[i] = sub[i].(string) } } } // Decode var md mapstructure.Metadata msdec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{ Metadata: &md, Result: &result, }) if err != nil { return nil, err } if err := msdec.Decode(raw); err != nil { return nil, err } // Check for deprecations if result.Ports.RPC != 0 { fmt.Fprintln(os.Stderr, "==> DEPRECATION: ports.rpc is deprecated and is "+ "no longer used. Please remove it from your configuration.") } if result.Addresses.RPC != "" { fmt.Fprintln(os.Stderr, "==> DEPRECATION: addresses.rpc is deprecated and "+ "is no longer used. Please remove it from your configuration.") } if result.DeprecatedAtlasInfrastructure != "" { fmt.Fprintln(os.Stderr, "==> DEPRECATION: atlas_infrastructure is deprecated and "+ "is no longer used. Please remove it from your configuration.") } if result.DeprecatedAtlasToken != "" { fmt.Fprintln(os.Stderr, "==> DEPRECATION: atlas_token is deprecated and "+ "is no longer used. Please remove it from your configuration.") } if result.DeprecatedAtlasACLToken != "" { fmt.Fprintln(os.Stderr, "==> DEPRECATION: atlas_acl_token is deprecated and "+ "is no longer used. Please remove it from your configuration.") } if result.DeprecatedAtlasJoin != false { fmt.Fprintln(os.Stderr, "==> DEPRECATION: atlas_join is deprecated and "+ "is no longer used. Please remove it from your configuration.") } if result.DeprecatedAtlasEndpoint != "" { fmt.Fprintln(os.Stderr, "==> DEPRECATION: atlas_endpoint is deprecated and "+ "is no longer used. Please remove it from your configuration.") } // Check unused fields and verify that no bad configuration options were // passed to Consul. There are a few additional fields which don't directly // use mapstructure decoding, so we need to account for those as well. These // telemetry-related fields used to be available as top-level keys, so they // are here for backward compatibility with the old format. allowedKeys := []string{ "service", "services", "check", "checks", "statsd_addr", "statsite_addr", "statsite_prefix", "dogstatsd_addr", "dogstatsd_tags", } var unused []string for _, field := range md.Unused { if !lib.StrContains(allowedKeys, field) { unused = append(unused, field) } } if len(unused) > 0 { return nil, fmt.Errorf("Config has invalid keys: %s", strings.Join(unused, ",")) } // Handle time conversions if raw := result.DNSConfig.NodeTTLRaw; raw != "" { dur, err := time.ParseDuration(raw) if err != nil { return nil, fmt.Errorf("NodeTTL invalid: %v", err) } result.DNSConfig.NodeTTL = dur } if raw := result.DNSConfig.MaxStaleRaw; raw != "" { dur, err := time.ParseDuration(raw) if err != nil { return nil, fmt.Errorf("MaxStale invalid: %v", err) } result.DNSConfig.MaxStale = dur } if raw := result.DNSConfig.RecursorTimeoutRaw; raw != "" { dur, err := time.ParseDuration(raw) if err != nil { return nil, fmt.Errorf("RecursorTimeout invalid: %v", err) } result.DNSConfig.RecursorTimeout = dur } if len(result.DNSConfig.ServiceTTLRaw) != 0 { if result.DNSConfig.ServiceTTL == nil { result.DNSConfig.ServiceTTL = make(map[string]time.Duration) } for service, raw := range result.DNSConfig.ServiceTTLRaw { dur, err := time.ParseDuration(raw) if err != nil { return nil, fmt.Errorf("ServiceTTL %s invalid: %v", service, err) } result.DNSConfig.ServiceTTL[service] = dur } } if raw := result.CheckUpdateIntervalRaw; raw != "" { dur, err := time.ParseDuration(raw) if err != nil { return nil, fmt.Errorf("CheckUpdateInterval invalid: %v", err) } result.CheckUpdateInterval = dur } if raw := result.ACLTTLRaw; raw != "" { dur, err := time.ParseDuration(raw) if err != nil { return nil, fmt.Errorf("ACL TTL invalid: %v", err) } result.ACLTTL = dur } if raw := result.RetryIntervalRaw; raw != "" { dur, err := time.ParseDuration(raw) if err != nil { return nil, fmt.Errorf("RetryInterval invalid: %v", err) } result.RetryInterval = dur } if raw := result.RetryIntervalWanRaw; raw != "" { dur, err := time.ParseDuration(raw) if err != nil { return nil, fmt.Errorf("RetryIntervalWan invalid: %v", err) } result.RetryIntervalWan = dur } const reconnectTimeoutMin = 8 * time.Hour if raw := result.ReconnectTimeoutLanRaw; raw != "" { dur, err := time.ParseDuration(raw) if err != nil { return nil, fmt.Errorf("ReconnectTimeoutLan invalid: %v", err) } if dur < reconnectTimeoutMin { return nil, fmt.Errorf("ReconnectTimeoutLan must be >= %s", reconnectTimeoutMin.String()) } result.ReconnectTimeoutLan = dur } if raw := result.ReconnectTimeoutWanRaw; raw != "" { dur, err := time.ParseDuration(raw) if err != nil { return nil, fmt.Errorf("ReconnectTimeoutWan invalid: %v", err) } if dur < reconnectTimeoutMin { return nil, fmt.Errorf("ReconnectTimeoutWan must be >= %s", reconnectTimeoutMin.String()) } result.ReconnectTimeoutWan = dur } if raw := result.Autopilot.LastContactThresholdRaw; raw != "" { dur, err := time.ParseDuration(raw) if err != nil { return nil, fmt.Errorf("LastContactThreshold invalid: %v", err) } result.Autopilot.LastContactThreshold = &dur } if raw := result.Autopilot.ServerStabilizationTimeRaw; raw != "" { dur, err := time.ParseDuration(raw) if err != nil { return nil, fmt.Errorf("ServerStabilizationTime invalid: %v", err) } result.Autopilot.ServerStabilizationTime = &dur } // Merge the single recursor if result.DNSRecursor != "" { result.DNSRecursors = append(result.DNSRecursors, result.DNSRecursor) } if raw := result.SessionTTLMinRaw; raw != "" { dur, err := time.ParseDuration(raw) if err != nil { return nil, fmt.Errorf("Session TTL Min invalid: %v", err) } result.SessionTTLMin = dur } if result.AdvertiseAddrs.SerfLanRaw != "" { ipStr, err := parseSingleIPTemplate(result.AdvertiseAddrs.SerfLanRaw) if err != nil { return nil, fmt.Errorf("Serf Advertise LAN address resolution failed: %v", err) } result.AdvertiseAddrs.SerfLanRaw = ipStr addr, err := net.ResolveTCPAddr("tcp", result.AdvertiseAddrs.SerfLanRaw) if err != nil { return nil, fmt.Errorf("AdvertiseAddrs.SerfLan is invalid: %v", err) } result.AdvertiseAddrs.SerfLan = addr } if result.AdvertiseAddrs.SerfWanRaw != "" { ipStr, err := parseSingleIPTemplate(result.AdvertiseAddrs.SerfWanRaw) if err != nil { return nil, fmt.Errorf("Serf Advertise WAN address resolution failed: %v", err) } result.AdvertiseAddrs.SerfWanRaw = ipStr addr, err := net.ResolveTCPAddr("tcp", result.AdvertiseAddrs.SerfWanRaw) if err != nil { return nil, fmt.Errorf("AdvertiseAddrs.SerfWan is invalid: %v", err) } result.AdvertiseAddrs.SerfWan = addr } if result.AdvertiseAddrs.RPCRaw != "" { ipStr, err := parseSingleIPTemplate(result.AdvertiseAddrs.RPCRaw) if err != nil { return nil, fmt.Errorf("RPC Advertise address resolution failed: %v", err) } result.AdvertiseAddrs.RPCRaw = ipStr addr, err := net.ResolveTCPAddr("tcp", result.AdvertiseAddrs.RPCRaw) if err != nil { return nil, fmt.Errorf("AdvertiseAddrs.RPC is invalid: %v", err) } result.AdvertiseAddrs.RPC = addr } // Enforce the max Raft multiplier. if result.Performance.RaftMultiplier > consul.MaxRaftMultiplier { return nil, fmt.Errorf("Performance.RaftMultiplier must be <= %d", consul.MaxRaftMultiplier) } if raw := result.TLSCipherSuitesRaw; raw != "" { ciphers, err := tlsutil.ParseCiphers(raw) if err != nil { return nil, fmt.Errorf("TLSCipherSuites invalid: %v", err) } result.TLSCipherSuites = ciphers } // This is for backwards compatibility. // HTTPAPIResponseHeaders has been replaced with HTTPConfig.ResponseHeaders if len(result.DeprecatedHTTPAPIResponseHeaders) > 0 { fmt.Fprintln(os.Stderr, "==> DEPRECATION: http_api_response_headers is deprecated and "+ "is no longer used. Please use http_config.response_headers instead.") if result.HTTPConfig.ResponseHeaders == nil { result.HTTPConfig.ResponseHeaders = make(map[string]string) } for field, value := range result.DeprecatedHTTPAPIResponseHeaders { result.HTTPConfig.ResponseHeaders[field] = value } result.DeprecatedHTTPAPIResponseHeaders = nil } // Set the ACL replication enable if they set a token, for backwards // compatibility. if result.ACLReplicationToken != "" { result.EnableACLReplication = true } // Parse the metric filters for _, rule := range result.Telemetry.PrefixFilter { if rule == "" { return nil, fmt.Errorf("Cannot have empty filter rule in prefix_filter") } switch rule[0] { case '+': result.Telemetry.AllowedPrefixes = append(result.Telemetry.AllowedPrefixes, rule[1:]) case '-': result.Telemetry.BlockedPrefixes = append(result.Telemetry.BlockedPrefixes, rule[1:]) default: return nil, fmt.Errorf("Filter rule must begin with either '+' or '-': %q", rule) } } return &result, nil } // DecodeServiceDefinition is used to decode a service definition func DecodeServiceDefinition(raw interface{}) (*structs.ServiceDefinition, error) { rawMap, ok := raw.(map[string]interface{}) if !ok { goto AFTER_FIX } // If no 'tags', handle the deprecated 'tag' value. if _, ok := rawMap["tags"]; !ok { if tag, ok := rawMap["tag"]; ok { rawMap["tags"] = []interface{}{tag} } } for k, v := range rawMap { switch strings.ToLower(k) { case "check": if err := FixupCheckType(v); err != nil { return nil, err } case "checks": chkTypes, ok := v.([]interface{}) if !ok { goto AFTER_FIX } for _, chkType := range chkTypes { if err := FixupCheckType(chkType); err != nil { return nil, err } } } } AFTER_FIX: var md mapstructure.Metadata var result structs.ServiceDefinition msdec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{ Metadata: &md, Result: &result, }) if err != nil { return nil, err } if err := msdec.Decode(raw); err != nil { return nil, err } return &result, nil } var errInvalidHeaderFormat = errors.New("agent: invalid format of 'header' field") func FixupCheckType(raw interface{}) error { rawMap, ok := raw.(map[string]interface{}) if !ok { return nil } parseDuration := func(v interface{}) (time.Duration, error) { if v == nil { return 0, nil } switch x := v.(type) { case time.Duration: return x, nil case float64: return time.Duration(x), nil case string: return time.ParseDuration(x) default: return 0, fmt.Errorf("invalid format") } } parseHeaderMap := func(v interface{}) (map[string][]string, error) { if v == nil { return nil, nil } vm, ok := v.(map[string]interface{}) if !ok { return nil, errInvalidHeaderFormat } m := map[string][]string{} for k, vv := range vm { vs, ok := vv.([]interface{}) if !ok { return nil, errInvalidHeaderFormat } for _, vs := range vs { s, ok := vs.(string) if !ok { return nil, errInvalidHeaderFormat } m[k] = append(m[k], s) } } return m, nil } replace := func(oldKey, newKey string, val interface{}) { rawMap[newKey] = val if oldKey != newKey { delete(rawMap, oldKey) } } for k, v := range rawMap { switch strings.ToLower(k) { case "header": h, err := parseHeaderMap(v) if err != nil { return fmt.Errorf("invalid %q: %s", k, err) } rawMap[k] = h case "ttl", "interval", "timeout": d, err := parseDuration(v) if err != nil { return fmt.Errorf("invalid %q: %v", k, err) } rawMap[k] = d case "deregister_critical_service_after", "deregistercriticalserviceafter": d, err := parseDuration(v) if err != nil { return fmt.Errorf("invalid %q: %v", k, err) } replace(k, "DeregisterCriticalServiceAfter", d) case "docker_container_id": replace(k, "DockerContainerID", v) case "service_id": replace(k, "ServiceID", v) case "tls_skip_verify": replace(k, "TLSSkipVerify", v) } } return nil } // DecodeCheckDefinition is used to decode a check definition func DecodeCheckDefinition(raw interface{}) (*structs.CheckDefinition, error) { if err := FixupCheckType(raw); err != nil { return nil, err } var md mapstructure.Metadata var result structs.CheckDefinition msdec, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{ Metadata: &md, Result: &result, }) if err != nil { return nil, err } if err := msdec.Decode(raw); err != nil { return nil, err } return &result, nil } // MergeConfig merges two configurations together to make a single new // configuration. func MergeConfig(a, b *Config) *Config { var result Config = *a // Propagate non-default performance settings if b.Performance.RaftMultiplier > 0 { result.Performance.RaftMultiplier = b.Performance.RaftMultiplier } // Copy the strings if they're set if b.Bootstrap { result.Bootstrap = true } if b.BootstrapExpect != 0 { result.BootstrapExpect = b.BootstrapExpect } if b.Datacenter != "" { result.Datacenter = b.Datacenter } if b.DataDir != "" { result.DataDir = b.DataDir } // Copy the dns recursors result.DNSRecursors = make([]string, 0, len(a.DNSRecursors)+len(b.DNSRecursors)) result.DNSRecursors = append(result.DNSRecursors, a.DNSRecursors...) result.DNSRecursors = append(result.DNSRecursors, b.DNSRecursors...) if b.Domain != "" { result.Domain = b.Domain } if b.EncryptKey != "" { result.EncryptKey = b.EncryptKey } if b.DisableKeyringFile { result.DisableKeyringFile = true } if b.EncryptVerifyIncoming != nil { result.EncryptVerifyIncoming = b.EncryptVerifyIncoming } if b.EncryptVerifyOutgoing != nil { result.EncryptVerifyOutgoing = b.EncryptVerifyOutgoing } if b.LogLevel != "" { result.LogLevel = b.LogLevel } if b.Protocol > 0 { result.Protocol = b.Protocol } if b.RaftProtocol > 0 { result.RaftProtocol = b.RaftProtocol } if b.NodeID != "" { result.NodeID = b.NodeID } if b.DisableHostNodeID != nil { result.DisableHostNodeID = b.DisableHostNodeID } if b.NodeName != "" { result.NodeName = b.NodeName } if b.ClientAddr != "" { result.ClientAddr = b.ClientAddr } if b.BindAddr != "" { result.BindAddr = b.BindAddr } if b.AdvertiseAddr != "" { result.AdvertiseAddr = b.AdvertiseAddr } if b.AdvertiseAddrWan != "" { result.AdvertiseAddrWan = b.AdvertiseAddrWan } if b.SerfWanBindAddr != "" { result.SerfWanBindAddr = b.SerfWanBindAddr } if b.SerfLanBindAddr != "" { result.SerfLanBindAddr = b.SerfLanBindAddr } if b.TranslateWanAddrs == true { result.TranslateWanAddrs = true } if b.AdvertiseAddrs.SerfLan != nil { result.AdvertiseAddrs.SerfLan = b.AdvertiseAddrs.SerfLan result.AdvertiseAddrs.SerfLanRaw = b.AdvertiseAddrs.SerfLanRaw } if b.AdvertiseAddrs.SerfWan != nil { result.AdvertiseAddrs.SerfWan = b.AdvertiseAddrs.SerfWan result.AdvertiseAddrs.SerfWanRaw = b.AdvertiseAddrs.SerfWanRaw } if b.AdvertiseAddrs.RPC != nil { result.AdvertiseAddrs.RPC = b.AdvertiseAddrs.RPC result.AdvertiseAddrs.RPCRaw = b.AdvertiseAddrs.RPCRaw } if b.Server == true { result.Server = b.Server } if b.NonVotingServer == true { result.NonVotingServer = b.NonVotingServer } if b.LeaveOnTerm != nil { result.LeaveOnTerm = b.LeaveOnTerm } if b.SkipLeaveOnInt != nil { result.SkipLeaveOnInt = b.SkipLeaveOnInt } if b.Autopilot.CleanupDeadServers != nil { result.Autopilot.CleanupDeadServers = b.Autopilot.CleanupDeadServers } if b.Autopilot.LastContactThreshold != nil { result.Autopilot.LastContactThreshold = b.Autopilot.LastContactThreshold } if b.Autopilot.MaxTrailingLogs != nil { result.Autopilot.MaxTrailingLogs = b.Autopilot.MaxTrailingLogs } if b.Autopilot.ServerStabilizationTime != nil { result.Autopilot.ServerStabilizationTime = b.Autopilot.ServerStabilizationTime } if b.Autopilot.RedundancyZoneTag != "" { result.Autopilot.RedundancyZoneTag = b.Autopilot.RedundancyZoneTag } if b.Autopilot.DisableUpgradeMigration != nil { result.Autopilot.DisableUpgradeMigration = b.Autopilot.DisableUpgradeMigration } if b.Autopilot.UpgradeVersionTag != "" { result.Autopilot.UpgradeVersionTag = b.Autopilot.UpgradeVersionTag } if b.Telemetry.DisableHostname == true { result.Telemetry.DisableHostname = true } if len(b.Telemetry.PrefixFilter) != 0 { result.Telemetry.PrefixFilter = append(result.Telemetry.PrefixFilter, b.Telemetry.PrefixFilter...) } if b.Telemetry.FilterDefault != nil { result.Telemetry.FilterDefault = b.Telemetry.FilterDefault } if b.Telemetry.StatsdAddr != "" { result.Telemetry.StatsdAddr = b.Telemetry.StatsdAddr } if b.Telemetry.StatsiteAddr != "" { result.Telemetry.StatsiteAddr = b.Telemetry.StatsiteAddr } if b.Telemetry.StatsitePrefix != "" { result.Telemetry.StatsitePrefix = b.Telemetry.StatsitePrefix } if b.Telemetry.DogStatsdAddr != "" { result.Telemetry.DogStatsdAddr = b.Telemetry.DogStatsdAddr } if b.Telemetry.DogStatsdTags != nil { result.Telemetry.DogStatsdTags = b.Telemetry.DogStatsdTags } if b.Telemetry.CirconusAPIToken != "" { result.Telemetry.CirconusAPIToken = b.Telemetry.CirconusAPIToken } if b.Telemetry.CirconusAPIApp != "" { result.Telemetry.CirconusAPIApp = b.Telemetry.CirconusAPIApp } if b.Telemetry.CirconusAPIURL != "" { result.Telemetry.CirconusAPIURL = b.Telemetry.CirconusAPIURL } if b.Telemetry.CirconusCheckSubmissionURL != "" { result.Telemetry.CirconusCheckSubmissionURL = b.Telemetry.CirconusCheckSubmissionURL } if b.Telemetry.CirconusSubmissionInterval != "" { result.Telemetry.CirconusSubmissionInterval = b.Telemetry.CirconusSubmissionInterval } if b.Telemetry.CirconusCheckID != "" { result.Telemetry.CirconusCheckID = b.Telemetry.CirconusCheckID } if b.Telemetry.CirconusCheckForceMetricActivation != "" { result.Telemetry.CirconusCheckForceMetricActivation = b.Telemetry.CirconusCheckForceMetricActivation } if b.Telemetry.CirconusCheckInstanceID != "" { result.Telemetry.CirconusCheckInstanceID = b.Telemetry.CirconusCheckInstanceID } if b.Telemetry.CirconusCheckSearchTag != "" { result.Telemetry.CirconusCheckSearchTag = b.Telemetry.CirconusCheckSearchTag } if b.Telemetry.CirconusCheckDisplayName != "" { result.Telemetry.CirconusCheckDisplayName = b.Telemetry.CirconusCheckDisplayName } if b.Telemetry.CirconusCheckTags != "" { result.Telemetry.CirconusCheckTags = b.Telemetry.CirconusCheckTags } if b.Telemetry.CirconusBrokerID != "" { result.Telemetry.CirconusBrokerID = b.Telemetry.CirconusBrokerID } if b.Telemetry.CirconusBrokerSelectTag != "" { result.Telemetry.CirconusBrokerSelectTag = b.Telemetry.CirconusBrokerSelectTag } if b.EnableDebug { result.EnableDebug = true } if b.VerifyIncoming { result.VerifyIncoming = true } if b.VerifyIncomingRPC { result.VerifyIncomingRPC = true } if b.VerifyIncomingHTTPS { result.VerifyIncomingHTTPS = true } if b.VerifyOutgoing { result.VerifyOutgoing = true } if b.VerifyServerHostname { result.VerifyServerHostname = true } if b.CAFile != "" { result.CAFile = b.CAFile } if b.CAPath != "" { result.CAPath = b.CAPath } if b.CertFile != "" { result.CertFile = b.CertFile } if b.KeyFile != "" { result.KeyFile = b.KeyFile } if b.ServerName != "" { result.ServerName = b.ServerName } if b.TLSMinVersion != "" { result.TLSMinVersion = b.TLSMinVersion } if len(b.TLSCipherSuites) != 0 { result.TLSCipherSuites = append(result.TLSCipherSuites, b.TLSCipherSuites...) } if b.TLSPreferServerCipherSuites { result.TLSPreferServerCipherSuites = true } if b.Checks != nil { result.Checks = append(result.Checks, b.Checks...) } if b.Services != nil { result.Services = append(result.Services, b.Services...) } if b.Ports.DNS != 0 { result.Ports.DNS = b.Ports.DNS } if b.Ports.HTTP != 0 { result.Ports.HTTP = b.Ports.HTTP } if b.Ports.HTTPS != 0 { result.Ports.HTTPS = b.Ports.HTTPS } if b.Ports.RPC != 0 { result.Ports.RPC = b.Ports.RPC } if b.Ports.SerfLan != 0 { result.Ports.SerfLan = b.Ports.SerfLan } if b.Ports.SerfWan != 0 { result.Ports.SerfWan = b.Ports.SerfWan } if b.Ports.Server != 0 { result.Ports.Server = b.Ports.Server } if b.Addresses.DNS != "" { result.Addresses.DNS = b.Addresses.DNS } if b.Addresses.HTTP != "" { result.Addresses.HTTP = b.Addresses.HTTP } if b.Addresses.HTTPS != "" { result.Addresses.HTTPS = b.Addresses.HTTPS } if b.Addresses.RPC != "" { result.Addresses.RPC = b.Addresses.RPC } if b.EnableUI { result.EnableUI = true } if b.UIDir != "" { result.UIDir = b.UIDir } if b.PidFile != "" { result.PidFile = b.PidFile } if b.EnableSyslog { result.EnableSyslog = true } if b.RejoinAfterLeave { result.RejoinAfterLeave = true } if b.RetryMaxAttempts != 0 { result.RetryMaxAttempts = b.RetryMaxAttempts } if b.RetryInterval != 0 { result.RetryInterval = b.RetryInterval } if b.DeprecatedRetryJoinEC2.AccessKeyID != "" { result.DeprecatedRetryJoinEC2.AccessKeyID = b.DeprecatedRetryJoinEC2.AccessKeyID } if b.DeprecatedRetryJoinEC2.SecretAccessKey != "" { result.DeprecatedRetryJoinEC2.SecretAccessKey = b.DeprecatedRetryJoinEC2.SecretAccessKey } if b.DeprecatedRetryJoinEC2.Region != "" { result.DeprecatedRetryJoinEC2.Region = b.DeprecatedRetryJoinEC2.Region } if b.DeprecatedRetryJoinEC2.TagKey != "" { result.DeprecatedRetryJoinEC2.TagKey = b.DeprecatedRetryJoinEC2.TagKey } if b.DeprecatedRetryJoinEC2.TagValue != "" { result.DeprecatedRetryJoinEC2.TagValue = b.DeprecatedRetryJoinEC2.TagValue } if b.DeprecatedRetryJoinGCE.ProjectName != "" { result.DeprecatedRetryJoinGCE.ProjectName = b.DeprecatedRetryJoinGCE.ProjectName } if b.DeprecatedRetryJoinGCE.ZonePattern != "" { result.DeprecatedRetryJoinGCE.ZonePattern = b.DeprecatedRetryJoinGCE.ZonePattern } if b.DeprecatedRetryJoinGCE.TagValue != "" { result.DeprecatedRetryJoinGCE.TagValue = b.DeprecatedRetryJoinGCE.TagValue } if b.DeprecatedRetryJoinGCE.CredentialsFile != "" { result.DeprecatedRetryJoinGCE.CredentialsFile = b.DeprecatedRetryJoinGCE.CredentialsFile } if b.DeprecatedRetryJoinAzure.TagName != "" { result.DeprecatedRetryJoinAzure.TagName = b.DeprecatedRetryJoinAzure.TagName } if b.DeprecatedRetryJoinAzure.TagValue != "" { result.DeprecatedRetryJoinAzure.TagValue = b.DeprecatedRetryJoinAzure.TagValue } if b.DeprecatedRetryJoinAzure.SubscriptionID != "" { result.DeprecatedRetryJoinAzure.SubscriptionID = b.DeprecatedRetryJoinAzure.SubscriptionID } if b.DeprecatedRetryJoinAzure.TenantID != "" { result.DeprecatedRetryJoinAzure.TenantID = b.DeprecatedRetryJoinAzure.TenantID } if b.DeprecatedRetryJoinAzure.ClientID != "" { result.DeprecatedRetryJoinAzure.ClientID = b.DeprecatedRetryJoinAzure.ClientID } if b.DeprecatedRetryJoinAzure.SecretAccessKey != "" { result.DeprecatedRetryJoinAzure.SecretAccessKey = b.DeprecatedRetryJoinAzure.SecretAccessKey } if b.RetryMaxAttemptsWan != 0 { result.RetryMaxAttemptsWan = b.RetryMaxAttemptsWan } if b.RetryIntervalWan != 0 { result.RetryIntervalWan = b.RetryIntervalWan } if b.ReconnectTimeoutLan != 0 { result.ReconnectTimeoutLan = b.ReconnectTimeoutLan result.ReconnectTimeoutLanRaw = b.ReconnectTimeoutLanRaw } if b.ReconnectTimeoutWan != 0 { result.ReconnectTimeoutWan = b.ReconnectTimeoutWan result.ReconnectTimeoutWanRaw = b.ReconnectTimeoutWanRaw } if b.DNSConfig.NodeTTL != 0 { result.DNSConfig.NodeTTL = b.DNSConfig.NodeTTL } if len(b.DNSConfig.ServiceTTL) != 0 { if result.DNSConfig.ServiceTTL == nil { result.DNSConfig.ServiceTTL = make(map[string]time.Duration) } for service, dur := range b.DNSConfig.ServiceTTL { result.DNSConfig.ServiceTTL[service] = dur } } if b.DNSConfig.AllowStale != nil { result.DNSConfig.AllowStale = b.DNSConfig.AllowStale } if b.DNSConfig.UDPAnswerLimit != 0 { result.DNSConfig.UDPAnswerLimit = b.DNSConfig.UDPAnswerLimit } if b.DNSConfig.EnableTruncate { result.DNSConfig.EnableTruncate = true } if b.DNSConfig.MaxStale != 0 { result.DNSConfig.MaxStale = b.DNSConfig.MaxStale } if b.DNSConfig.OnlyPassing { result.DNSConfig.OnlyPassing = true } if b.DNSConfig.DisableCompression { result.DNSConfig.DisableCompression = true } if b.DNSConfig.RecursorTimeout != 0 { result.DNSConfig.RecursorTimeout = b.DNSConfig.RecursorTimeout } if b.EnableScriptChecks { result.EnableScriptChecks = true } if b.CheckUpdateIntervalRaw != "" || b.CheckUpdateInterval != 0 { result.CheckUpdateInterval = b.CheckUpdateInterval } if b.SyslogFacility != "" { result.SyslogFacility = b.SyslogFacility } if b.ACLToken != "" { result.ACLToken = b.ACLToken } if b.ACLAgentMasterToken != "" { result.ACLAgentMasterToken = b.ACLAgentMasterToken } if b.ACLAgentToken != "" { result.ACLAgentToken = b.ACLAgentToken } if b.ACLMasterToken != "" { result.ACLMasterToken = b.ACLMasterToken } if b.ACLDatacenter != "" { result.ACLDatacenter = b.ACLDatacenter } if b.ACLTTLRaw != "" { result.ACLTTL = b.ACLTTL result.ACLTTLRaw = b.ACLTTLRaw } if b.ACLDownPolicy != "" { result.ACLDownPolicy = b.ACLDownPolicy } if b.ACLDefaultPolicy != "" { result.ACLDefaultPolicy = b.ACLDefaultPolicy } if b.EnableACLReplication { result.EnableACLReplication = true } if b.ACLReplicationToken != "" { result.ACLReplicationToken = b.ACLReplicationToken } if b.ACLEnforceVersion8 != nil { result.ACLEnforceVersion8 = b.ACLEnforceVersion8 } if len(b.Watches) != 0 { result.Watches = append(result.Watches, b.Watches...) } if len(b.WatchPlans) != 0 { result.WatchPlans = append(result.WatchPlans, b.WatchPlans...) } if b.DisableRemoteExec != nil { result.DisableRemoteExec = b.DisableRemoteExec } if b.DisableUpdateCheck { result.DisableUpdateCheck = true } if b.DisableAnonymousSignature { result.DisableAnonymousSignature = true } if b.UnixSockets.Usr != "" { result.UnixSockets.Usr = b.UnixSockets.Usr } if b.UnixSockets.Grp != "" { result.UnixSockets.Grp = b.UnixSockets.Grp } if b.UnixSockets.Perms != "" { result.UnixSockets.Perms = b.UnixSockets.Perms } if b.DisableCoordinates { result.DisableCoordinates = true } if b.SessionTTLMinRaw != "" { result.SessionTTLMin = b.SessionTTLMin result.SessionTTLMinRaw = b.SessionTTLMinRaw } result.HTTPConfig.BlockEndpoints = append(a.HTTPConfig.BlockEndpoints, b.HTTPConfig.BlockEndpoints...) if len(b.HTTPConfig.ResponseHeaders) > 0 { if result.HTTPConfig.ResponseHeaders == nil { result.HTTPConfig.ResponseHeaders = make(map[string]string) } for field, value := range b.HTTPConfig.ResponseHeaders { result.HTTPConfig.ResponseHeaders[field] = value } } if len(b.Meta) != 0 { if result.Meta == nil { result.Meta = make(map[string]string) } for field, value := range b.Meta { result.Meta[field] = value } } // Copy the start join addresses result.StartJoin = make([]string, 0, len(a.StartJoin)+len(b.StartJoin)) result.StartJoin = append(result.StartJoin, a.StartJoin...) result.StartJoin = append(result.StartJoin, b.StartJoin...) // Copy the start join addresses result.StartJoinWan = make([]string, 0, len(a.StartJoinWan)+len(b.StartJoinWan)) result.StartJoinWan = append(result.StartJoinWan, a.StartJoinWan...) result.StartJoinWan = append(result.StartJoinWan, b.StartJoinWan...) // Copy the retry join addresses result.RetryJoin = make([]string, 0, len(a.RetryJoin)+len(b.RetryJoin)) result.RetryJoin = append(result.RetryJoin, a.RetryJoin...) result.RetryJoin = append(result.RetryJoin, b.RetryJoin...) // Copy the retry join -wan addresses result.RetryJoinWan = make([]string, 0, len(a.RetryJoinWan)+len(b.RetryJoinWan)) result.RetryJoinWan = append(result.RetryJoinWan, a.RetryJoinWan...) result.RetryJoinWan = append(result.RetryJoinWan, b.RetryJoinWan...) return &result } // ReadConfigPaths reads the paths in the given order to load configurations. // The paths can be to files or directories. If the path is a directory, // we read one directory deep and read any files ending in ".json" as // configuration files. func ReadConfigPaths(paths []string) (*Config, error) { result := new(Config) for _, path := range paths { f, err := os.Open(path) if err != nil { return nil, fmt.Errorf("Error reading '%s': %s", path, err) } fi, err := f.Stat() if err != nil { f.Close() return nil, fmt.Errorf("Error reading '%s': %s", path, err) } if !fi.IsDir() { config, err := DecodeConfig(f) f.Close() if err != nil { return nil, fmt.Errorf("Error decoding '%s': %s", path, err) } result = MergeConfig(result, config) continue } contents, err := f.Readdir(-1) f.Close() if err != nil { return nil, fmt.Errorf("Error reading '%s': %s", path, err) } // Sort the contents, ensures lexical order sort.Sort(dirEnts(contents)) for _, fi := range contents { // Don't recursively read contents if fi.IsDir() { continue } // If it isn't a JSON file, ignore it if !strings.HasSuffix(fi.Name(), ".json") { continue } // If the config file is empty, ignore it if fi.Size() == 0 { continue } subpath := filepath.Join(path, fi.Name()) f, err := os.Open(subpath) if err != nil { return nil, fmt.Errorf("Error reading '%s': %s", subpath, err) } config, err := DecodeConfig(f) f.Close() if err != nil { return nil, fmt.Errorf("Error decoding '%s': %s", subpath, err) } result = MergeConfig(result, config) } } return result, nil } // ResolveTmplAddrs iterates over the myriad of addresses in the agent's config // and performs go-sockaddr/template Parse on each known address in case the // user specified a template config for any of their values. func (c *Config) ResolveTmplAddrs() (err error) { parse := func(addr *string, socketAllowed bool, name string) { if *addr == "" || err != nil { return } var ip string ip, err = parseSingleIPTemplate(*addr) if err != nil { err = fmt.Errorf("Resolution of %s failed: %v", name, err) return } ipAddr := net.ParseIP(ip) if !socketAllowed && ipAddr == nil { err = fmt.Errorf("Failed to parse %s: %v", name, ip) return } if socketAllowed && socketPath(ip) == "" && ipAddr == nil { err = fmt.Errorf("Failed to parse %s, %q is not a valid IP address or socket", name, ip) return } *addr = ip } if c == nil { return } parse(&c.Addresses.DNS, true, "DNS address") parse(&c.Addresses.HTTP, true, "HTTP address") parse(&c.Addresses.HTTPS, true, "HTTPS address") parse(&c.AdvertiseAddr, false, "Advertise address") parse(&c.AdvertiseAddrWan, false, "Advertise WAN address") parse(&c.BindAddr, true, "Bind address") parse(&c.ClientAddr, true, "Client address") parse(&c.SerfLanBindAddr, false, "Serf LAN address") parse(&c.SerfWanBindAddr, false, "Serf WAN address") return } // SetupTaggedAndAdvertiseAddrs configures advertise addresses and sets up a map of tagged addresses func (cfg *Config) SetupTaggedAndAdvertiseAddrs() error { if cfg.AdvertiseAddr == "" { switch { case cfg.BindAddr != "" && !ipaddr.IsAny(cfg.BindAddr): cfg.AdvertiseAddr = cfg.BindAddr default: ip, err := consul.GetPrivateIP() if ipaddr.IsAnyV6(cfg.BindAddr) { ip, err = consul.GetPublicIPv6() } if err != nil { return fmt.Errorf("Failed to get advertise address: %v", err) } cfg.AdvertiseAddr = ip.String() } } // Try to get an advertise address for the wan if cfg.AdvertiseAddrWan == "" { cfg.AdvertiseAddrWan = cfg.AdvertiseAddr } // Create the default set of tagged addresses. cfg.TaggedAddresses = map[string]string{ "lan": cfg.AdvertiseAddr, "wan": cfg.AdvertiseAddrWan, } return nil } // parseSingleIPTemplate is used as a helper function to parse out a single IP // address from a config parameter. func parseSingleIPTemplate(ipTmpl string) (string, error) { out, err := template.Parse(ipTmpl) if err != nil { return "", fmt.Errorf("Unable to parse address template %q: %v", ipTmpl, err) } ips := strings.Split(out, " ") switch len(ips) { case 0: return "", errors.New("No addresses found, please configure one.") case 1: return ips[0], nil default: return "", fmt.Errorf("Multiple addresses found (%q), please configure one.", out) } } // Implement the sort interface for dirEnts func (d dirEnts) Len() int { return len(d) } func (d dirEnts) Less(i, j int) bool { return d[i].Name() < d[j].Name() } func (d dirEnts) Swap(i, j int) { d[i], d[j] = d[j], d[i] } // ParseMetaPair parses a key/value pair of the form key:value func ParseMetaPair(raw string) (string, string) { pair := strings.SplitN(raw, ":", 2) if len(pair) == 2 { return pair[0], pair[1] } return pair[0], "" }