1088 lines
32 KiB
Go
1088 lines
32 KiB
Go
package agent
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import (
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"encoding/base64"
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"encoding/json"
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"fmt"
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"io"
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"net"
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"os"
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"path/filepath"
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"sort"
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"strings"
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"time"
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"github.com/hashicorp/consul/consul"
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"github.com/hashicorp/consul/watch"
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"github.com/mitchellh/mapstructure"
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)
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// Ports is used to simplify the configuration by
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// providing default ports, and allowing the addresses
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// to only be specified once
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type PortConfig struct {
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DNS int // DNS Query interface
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HTTP int // HTTP API
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HTTPS int // HTTPS API
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RPC int // CLI RPC
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SerfLan int `mapstructure:"serf_lan"` // LAN gossip (Client + Server)
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SerfWan int `mapstructure:"serf_wan"` // WAN gossip (Server onlyg)
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Server int // Server internal RPC
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}
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// AddressConfig is used to provide address overrides
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// for specific services. By default, either ClientAddress
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// or ServerAddress is used.
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type AddressConfig struct {
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DNS string // DNS Query interface
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HTTP string // HTTP API
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HTTPS string // HTTPS API
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RPC string // CLI RPC
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}
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// DNSConfig is used to fine tune the DNS sub-system.
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// It can be used to control cache values, and stale
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// reads
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type DNSConfig struct {
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// NodeTTL provides the TTL value for a node query
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NodeTTL time.Duration `mapstructure:"-"`
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NodeTTLRaw string `mapstructure:"node_ttl" json:"-"`
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// ServiceTTL provides the TTL value for a service
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// query for given service. The "*" wildcard can be used
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// to set a default for all services.
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ServiceTTL map[string]time.Duration `mapstructure:"-"`
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ServiceTTLRaw map[string]string `mapstructure:"service_ttl" json:"-"`
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// AllowStale is used to enable lookups with stale
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// data. This gives horizontal read scalability since
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// any Consul server can service the query instead of
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// only the leader.
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AllowStale bool `mapstructure:"allow_stale"`
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// EnableTruncate is used to enable setting the truncate
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// flag for UDP DNS queries. This allows unmodified
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// clients to re-query the consul server using TCP
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// when the total number of records exceeds the number
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// returned by default for UDP.
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EnableTruncate bool `mapstructure:"enable_truncate"`
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// MaxStale is used to bound how stale of a result is
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// accepted for a DNS lookup. This can be used with
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// AllowStale to limit how old of a value is served up.
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// If the stale result exceeds this, another non-stale
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// stale read is performed.
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MaxStale time.Duration `mapstructure:"-"`
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MaxStaleRaw string `mapstructure:"max_stale" json:"-"`
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// OnlyPassing is used to determine whether to filter nodes
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// whose health checks are in any non-passing state. By
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// default, only nodes in a critical state are excluded.
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OnlyPassing bool `mapstructure:"only_passing"`
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}
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// Config is the configuration that can be set for an Agent.
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// Some of this is configurable as CLI flags, but most must
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// be set using a configuration file.
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type Config struct {
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// Bootstrap is used to bring up the first Consul server, and
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// permits that node to elect itself leader
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Bootstrap bool `mapstructure:"bootstrap"`
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// BootstrapExpect tries to automatically bootstrap the Consul cluster,
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// by witholding peers until enough servers join.
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BootstrapExpect int `mapstructure:"bootstrap_expect"`
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// Server controls if this agent acts like a Consul server,
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// or merely as a client. Servers have more state, take part
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// in leader election, etc.
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Server bool `mapstructure:"server"`
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// Datacenter is the datacenter this node is in. Defaults to dc1
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Datacenter string `mapstructure:"datacenter"`
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// DataDir is the directory to store our state in
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DataDir string `mapstructure:"data_dir"`
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// DNSRecursors can be set to allow the DNS servers to recursively
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// resolve non-consul domains. It is deprecated, and merges into the
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// recursors array.
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DNSRecursor string `mapstructure:"recursor"`
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// DNSRecursors can be set to allow the DNS servers to recursively
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// resolve non-consul domains
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DNSRecursors []string `mapstructure:"recursors"`
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// DNS configuration
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DNSConfig DNSConfig `mapstructure:"dns_config"`
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// Domain is the DNS domain for the records. Defaults to "consul."
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Domain string `mapstructure:"domain"`
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// Encryption key to use for the Serf communication
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EncryptKey string `mapstructure:"encrypt" json:"-"`
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// LogLevel is the level of the logs to putout
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LogLevel string `mapstructure:"log_level"`
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// Node name is the name we use to advertise. Defaults to hostname.
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NodeName string `mapstructure:"node_name"`
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// ClientAddr is used to control the address we bind to for
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// client services (DNS, HTTP, HTTPS, RPC)
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ClientAddr string `mapstructure:"client_addr"`
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// BindAddr is used to control the address we bind to.
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// If not specified, the first private IP we find is used.
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// This controls the address we use for cluster facing
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// services (Gossip, Server RPC)
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BindAddr string `mapstructure:"bind_addr"`
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// AdvertiseAddr is the address we use for advertising our Serf,
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// and Consul RPC IP. If not specified, bind address is used.
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AdvertiseAddr string `mapstructure:"advertise_addr"`
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// Port configurations
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Ports PortConfig
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// Address configurations
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Addresses AddressConfig
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// LeaveOnTerm controls if Serf does a graceful leave when receiving
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// the TERM signal. Defaults false. This can be changed on reload.
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LeaveOnTerm bool `mapstructure:"leave_on_terminate"`
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// SkipLeaveOnInt controls if Serf skips a graceful leave when receiving
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// the INT signal. Defaults false. This can be changed on reload.
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SkipLeaveOnInt bool `mapstructure:"skip_leave_on_interrupt"`
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// StatsiteAddr is the address of a statsite instance. If provided,
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// metrics will be streamed to that instance.
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StatsiteAddr string `mapstructure:"statsite_addr"`
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// StatsdAddr is the address of a statsd instance. If provided,
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// metrics will be sent to that instance.
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StatsdAddr string `mapstructure:"statsd_addr"`
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// Protocol is the Consul protocol version to use.
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Protocol int `mapstructure:"protocol"`
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// EnableDebug is used to enable various debugging features
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EnableDebug bool `mapstructure:"enable_debug"`
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// VerifyIncoming is used to verify the authenticity of incoming connections.
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// This means that TCP requests are forbidden, only allowing for TLS. TLS connections
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// must match a provided certificate authority. This can be used to force client auth.
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VerifyIncoming bool `mapstructure:"verify_incoming"`
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// VerifyOutgoing is used to verify the authenticity of outgoing connections.
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// This means that TLS requests are used. TLS connections must match a provided
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// certificate authority. This is used to verify authenticity of server nodes.
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VerifyOutgoing bool `mapstructure:"verify_outgoing"`
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// CAFile is a path to a certificate authority file. This is used with VerifyIncoming
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// or VerifyOutgoing to verify the TLS connection.
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CAFile string `mapstructure:"ca_file"`
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// CertFile is used to provide a TLS certificate that is used for serving TLS connections.
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// Must be provided to serve TLS connections.
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CertFile string `mapstructure:"cert_file"`
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// KeyFile is used to provide a TLS key that is used for serving TLS connections.
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// Must be provided to serve TLS connections.
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KeyFile string `mapstructure:"key_file"`
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// ServerName is used with the TLS certificates to ensure the name we
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// provid ematches the certificate
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ServerName string `mapstructure:"server_name"`
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// StartJoin is a list of addresses to attempt to join when the
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// agent starts. If Serf is unable to communicate with any of these
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// addresses, then the agent will error and exit.
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StartJoin []string `mapstructure:"start_join"`
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// StartJoinWan is a list of addresses to attempt to join -wan when the
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// agent starts. If Serf is unable to communicate with any of these
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// addresses, then the agent will error and exit.
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StartJoinWan []string `mapstructure:"start_join_wan"`
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// RetryJoin is a list of addresses to join with retry enabled.
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RetryJoin []string `mapstructure:"retry_join"`
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// RetryMaxAttempts specifies the maximum number of times to retry joining a
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// host on startup. This is useful for cases where we know the node will be
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// online eventually.
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RetryMaxAttempts int `mapstructure:"retry_max"`
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// RetryInterval specifies the amount of time to wait in between join
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// attempts on agent start. The minimum allowed value is 1 second and
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// the default is 30s.
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RetryInterval time.Duration `mapstructure:"-" json:"-"`
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RetryIntervalRaw string `mapstructure:"retry_interval"`
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// RetryJoinWan is a list of addresses to join -wan with retry enabled.
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RetryJoinWan []string `mapstructure:"retry_join_wan"`
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// RetryMaxAttemptsWan specifies the maximum number of times to retry joining a
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// -wan host on startup. This is useful for cases where we know the node will be
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// online eventually.
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RetryMaxAttemptsWan int `mapstructure:"retry_max_wan"`
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// RetryIntervalWan specifies the amount of time to wait in between join
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// -wan attempts on agent start. The minimum allowed value is 1 second and
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// the default is 30s.
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RetryIntervalWan time.Duration `mapstructure:"-" json:"-"`
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RetryIntervalWanRaw string `mapstructure:"retry_interval_wan"`
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// UiDir is the directory containing the Web UI resources.
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// If provided, the UI endpoints will be enabled.
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UiDir string `mapstructure:"ui_dir"`
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// PidFile is the file to store our PID in
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PidFile string `mapstructure:"pid_file"`
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// EnableSyslog is used to also tee all the logs over to syslog. Only supported
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// on linux and OSX. Other platforms will generate an error.
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EnableSyslog bool `mapstructure:"enable_syslog"`
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// SyslogFacility is used to control where the syslog messages go
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// By default, goes to LOCAL0
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SyslogFacility string `mapstructure:"syslog_facility"`
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// RejoinAfterLeave controls our interaction with the cluster after leave.
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// When set to false (default), a leave causes Consul to not rejoin
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// the cluster until an explicit join is received. If this is set to
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// true, we ignore the leave, and rejoin the cluster on start.
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RejoinAfterLeave bool `mapstructure:"rejoin_after_leave"`
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// CheckUpdateInterval controls the interval on which the output of a health check
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// is updated if there is no change to the state. For example, a check in a steady
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// state may run every 5 second generating a unique output (timestamp, etc), forcing
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// constant writes. This allows Consul to defer the write for some period of time,
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// reducing the write pressure when the state is steady.
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CheckUpdateInterval time.Duration `mapstructure:"-"`
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CheckUpdateIntervalRaw string `mapstructure:"check_update_interval" json:"-"`
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// ACLToken is the default token used to make requests if a per-request
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// token is not provided. If not configured the 'anonymous' token is used.
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ACLToken string `mapstructure:"acl_token" json:"-"`
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// ACLMasterToken is used to bootstrap the ACL system. It should be specified
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// on the servers in the ACLDatacenter. When the leader comes online, it ensures
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// that the Master token is available. This provides the initial token.
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ACLMasterToken string `mapstructure:"acl_master_token" json:"-"`
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// ACLDatacenter is the central datacenter that holds authoritative
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// ACL records. This must be the same for the entire cluster.
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// If this is not set, ACLs are not enabled. Off by default.
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ACLDatacenter string `mapstructure:"acl_datacenter"`
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// ACLTTL is used to control the time-to-live of cached ACLs . This has
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// a major impact on performance. By default, it is set to 30 seconds.
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ACLTTL time.Duration `mapstructure:"-"`
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ACLTTLRaw string `mapstructure:"acl_ttl"`
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// ACLDefaultPolicy is used to control the ACL interaction when
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// there is no defined policy. This can be "allow" which means
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// ACLs are used to black-list, or "deny" which means ACLs are
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// white-lists.
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ACLDefaultPolicy string `mapstructure:"acl_default_policy"`
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// ACLDownPolicy is used to control the ACL interaction when we cannot
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// reach the ACLDatacenter and the token is not in the cache.
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// There are two modes:
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// * deny - Deny all requests
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// * extend-cache - Ignore the cache expiration, and allow cached
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// ACL's to be used to service requests. This
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// is the default. If the ACL is not in the cache,
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// this acts like deny.
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ACLDownPolicy string `mapstructure:"acl_down_policy"`
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// Watches are used to monitor various endpoints and to invoke a
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// handler to act appropriately. These are managed entirely in the
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// agent layer using the standard APIs.
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Watches []map[string]interface{} `mapstructure:"watches"`
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// DisableRemoteExec is used to turn off the remote execution
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// feature. This is for security to prevent unknown scripts from running.
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DisableRemoteExec bool `mapstructure:"disable_remote_exec"`
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// DisableUpdateCheck is used to turn off the automatic update and
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// security bulletin checking.
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DisableUpdateCheck bool `mapstructure:"disable_update_check"`
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// DisableAnonymousSignature is used to turn off the anonymous signature
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// send with the update check. This is used to deduplicate messages.
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DisableAnonymousSignature bool `mapstructure:"disable_anonymous_signature"`
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// HTTPAPIResponseHeaders are used to add HTTP header response fields to the HTTP API responses.
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HTTPAPIResponseHeaders map[string]string `mapstructure:"http_api_response_headers"`
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// AtlasCluster is the name of the cluster we belong to. e.g. hashicorp/stage
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AtlasCluster string `mapstructure:"atlas_cluster"`
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// AtlasToken is our authentication token from Atlas
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AtlasToken string `mapstructure:"atlas_token"`
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// AtlasACLToken is applied to inbound requests if no other token
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// is provided. This takes higher precedence than the ACLToken.
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// Without this, the ACLToken is used. If that is not specified either,
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// then the 'anonymous' token is used. This can be set to 'anonymous'
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// to reduce the Atlas privileges to below that of the ACLToken.
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AtlasACLToken string `mapstructure:"atlas_acl_token"`
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// AtlasJoin controls if Atlas will attempt to auto-join the node
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// to it's cluster. Requires Atlas integration.
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AtlasJoin bool `mapstructure:"atlas_join"`
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// AEInterval controls the anti-entropy interval. This is how often
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// the agent attempts to reconcile it's local state with the server'
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// representation of our state. Defaults to every 60s.
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AEInterval time.Duration `mapstructure:"-" json:"-"`
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// Checks holds the provided check definitions
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Checks []*CheckDefinition `mapstructure:"-" json:"-"`
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// Services holds the provided service definitions
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Services []*ServiceDefinition `mapstructure:"-" json:"-"`
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// ConsulConfig can either be provided or a default one created
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ConsulConfig *consul.Config `mapstructure:"-" json:"-"`
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// Revision is the GitCommit this maps to
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Revision string `mapstructure:"-"`
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// Version is the release version number
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Version string `mapstructure:"-"`
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// VersionPrerelease is a label for pre-release builds
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VersionPrerelease string `mapstructure:"-"`
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// WatchPlans contains the compiled watches
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WatchPlans []*watch.WatchPlan `mapstructure:"-" json:"-"`
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// UnixSockets is a map of socket configuration data
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UnixSockets UnixSocketConfig `mapstructure:"unix_sockets"`
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}
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// UnixSocketPermissions contains information about a unix socket, and
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// implements the FilePermissions interface.
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type UnixSocketPermissions struct {
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Usr string `mapstructure:"user"`
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Grp string `mapstructure:"group"`
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Perms string `mapstructure:"mode"`
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}
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func (u UnixSocketPermissions) User() string {
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return u.Usr
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}
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func (u UnixSocketPermissions) Group() string {
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return u.Grp
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}
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func (u UnixSocketPermissions) Mode() string {
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return u.Perms
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}
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// UnixSocketConfig stores information about various unix sockets which
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// Consul creates and uses for communication.
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type UnixSocketConfig struct {
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UnixSocketPermissions `mapstructure:",squash"`
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}
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// unixSocketAddr tests if a given address describes a domain socket,
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// and returns the relevant path part of the string if it is.
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func unixSocketAddr(addr string) (string, bool) {
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if !strings.HasPrefix(addr, "unix://") {
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return "", false
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}
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return strings.TrimPrefix(addr, "unix://"), true
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}
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type dirEnts []os.FileInfo
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// DefaultConfig is used to return a sane default configuration
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func DefaultConfig() *Config {
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return &Config{
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Bootstrap: false,
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BootstrapExpect: 0,
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Server: false,
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Datacenter: consul.DefaultDC,
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Domain: "consul.",
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LogLevel: "INFO",
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ClientAddr: "127.0.0.1",
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BindAddr: "0.0.0.0",
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Ports: PortConfig{
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DNS: 8600,
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HTTP: 8500,
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HTTPS: -1,
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RPC: 8400,
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SerfLan: consul.DefaultLANSerfPort,
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SerfWan: consul.DefaultWANSerfPort,
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Server: 8300,
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},
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DNSConfig: DNSConfig{
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MaxStale: 5 * time.Second,
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},
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SyslogFacility: "LOCAL0",
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Protocol: consul.ProtocolVersionMax,
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CheckUpdateInterval: 5 * time.Minute,
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AEInterval: time.Minute,
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ACLTTL: 30 * time.Second,
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ACLDownPolicy: "extend-cache",
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ACLDefaultPolicy: "allow",
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RetryInterval: 30 * time.Second,
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RetryIntervalWan: 30 * time.Second,
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}
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}
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// EncryptBytes returns the encryption key configured.
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func (c *Config) EncryptBytes() ([]byte, error) {
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return base64.StdEncoding.DecodeString(c.EncryptKey)
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}
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// ClientListener is used to format a listener for a
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// port on a ClientAddr
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func (c *Config) ClientListener(override string, port int) (net.Addr, error) {
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var addr string
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if override != "" {
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addr = override
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} else {
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addr = c.ClientAddr
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}
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if path, ok := unixSocketAddr(addr); ok {
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return &net.UnixAddr{Name: path, Net: "unix"}, nil
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}
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ip := net.ParseIP(addr)
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if ip == nil {
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return nil, fmt.Errorf("Failed to parse IP: %v", addr)
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}
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return &net.TCPAddr{IP: ip, Port: port}, nil
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}
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// DecodeConfig reads the configuration from the given reader in JSON
|
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// format and decodes it into a proper Config structure.
|
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func DecodeConfig(r io.Reader) (*Config, error) {
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var raw interface{}
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var result Config
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dec := json.NewDecoder(r)
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if err := dec.Decode(&raw); err != nil {
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return nil, err
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}
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// Check the result type
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if obj, ok := raw.(map[string]interface{}); ok {
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// Check for a "services", "service" or "check" key, meaning
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// this is actually a definition entry
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if sub, ok := obj["services"]; ok {
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if list, ok := sub.([]interface{}); ok {
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for _, srv := range list {
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service, err := DecodeServiceDefinition(srv)
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if err != nil {
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return nil, err
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}
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result.Services = append(result.Services, service)
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}
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}
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}
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if sub, ok := obj["service"]; ok {
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|
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)
|
|
}
|
|
}
|
|
|
|
// 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 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.
|
|
allowedKeys := []string{"service", "services", "check", "checks"}
|
|
var unused []string
|
|
for _, field := range md.Unused {
|
|
if !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 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
|
|
}
|
|
|
|
// Merge the single recursor
|
|
if result.DNSRecursor != "" {
|
|
result.DNSRecursors = append(result.DNSRecursors, result.DNSRecursor)
|
|
}
|
|
|
|
return &result, nil
|
|
}
|
|
|
|
// DecodeServiceDefinition is used to decode a service definition
|
|
func DecodeServiceDefinition(raw interface{}) (*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 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
|
|
}
|
|
|
|
func FixupCheckType(raw interface{}) error {
|
|
var ttlKey, intervalKey, timeoutKey string
|
|
|
|
// Handle decoding of time durations
|
|
rawMap, ok := raw.(map[string]interface{})
|
|
if !ok {
|
|
return nil
|
|
}
|
|
|
|
for k, v := range rawMap {
|
|
switch strings.ToLower(k) {
|
|
case "ttl":
|
|
ttlKey = k
|
|
case "interval":
|
|
intervalKey = k
|
|
case "timeout":
|
|
timeoutKey = k
|
|
case "service_id":
|
|
rawMap["serviceid"] = v
|
|
delete(rawMap, "service_id")
|
|
}
|
|
}
|
|
|
|
if ttl, ok := rawMap[ttlKey]; ok {
|
|
ttlS, ok := ttl.(string)
|
|
if ok {
|
|
if dur, err := time.ParseDuration(ttlS); err != nil {
|
|
return err
|
|
} else {
|
|
rawMap[ttlKey] = dur
|
|
}
|
|
}
|
|
}
|
|
|
|
if interval, ok := rawMap[intervalKey]; ok {
|
|
intervalS, ok := interval.(string)
|
|
if ok {
|
|
if dur, err := time.ParseDuration(intervalS); err != nil {
|
|
return err
|
|
} else {
|
|
rawMap[intervalKey] = dur
|
|
}
|
|
}
|
|
}
|
|
|
|
if timeout, ok := rawMap[timeoutKey]; ok {
|
|
timeoutS, ok := timeout.(string)
|
|
if ok {
|
|
if dur, err := time.ParseDuration(timeoutS); err != nil {
|
|
return err
|
|
} else {
|
|
rawMap[timeoutKey] = dur
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// DecodeCheckDefinition is used to decode a check definition
|
|
func DecodeCheckDefinition(raw interface{}) (*CheckDefinition, error) {
|
|
if err := FixupCheckType(raw); err != nil {
|
|
return nil, err
|
|
}
|
|
var md mapstructure.Metadata
|
|
var result 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
|
|
|
|
// 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.LogLevel != "" {
|
|
result.LogLevel = b.LogLevel
|
|
}
|
|
if b.Protocol > 0 {
|
|
result.Protocol = b.Protocol
|
|
}
|
|
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.Server == true {
|
|
result.Server = b.Server
|
|
}
|
|
if b.LeaveOnTerm == true {
|
|
result.LeaveOnTerm = true
|
|
}
|
|
if b.SkipLeaveOnInt == true {
|
|
result.SkipLeaveOnInt = true
|
|
}
|
|
if b.StatsiteAddr != "" {
|
|
result.StatsiteAddr = b.StatsiteAddr
|
|
}
|
|
if b.StatsdAddr != "" {
|
|
result.StatsdAddr = b.StatsdAddr
|
|
}
|
|
if b.EnableDebug {
|
|
result.EnableDebug = true
|
|
}
|
|
if b.VerifyIncoming {
|
|
result.VerifyIncoming = true
|
|
}
|
|
if b.VerifyOutgoing {
|
|
result.VerifyOutgoing = true
|
|
}
|
|
if b.CAFile != "" {
|
|
result.CAFile = b.CAFile
|
|
}
|
|
if b.CertFile != "" {
|
|
result.CertFile = b.CertFile
|
|
}
|
|
if b.KeyFile != "" {
|
|
result.KeyFile = b.KeyFile
|
|
}
|
|
if b.ServerName != "" {
|
|
result.ServerName = b.ServerName
|
|
}
|
|
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.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.RetryMaxAttemptsWan != 0 {
|
|
result.RetryMaxAttemptsWan = b.RetryMaxAttemptsWan
|
|
}
|
|
if b.RetryIntervalWan != 0 {
|
|
result.RetryIntervalWan = b.RetryIntervalWan
|
|
}
|
|
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 {
|
|
result.DNSConfig.AllowStale = true
|
|
}
|
|
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.CheckUpdateIntervalRaw != "" || b.CheckUpdateInterval != 0 {
|
|
result.CheckUpdateInterval = b.CheckUpdateInterval
|
|
}
|
|
if b.SyslogFacility != "" {
|
|
result.SyslogFacility = b.SyslogFacility
|
|
}
|
|
if b.ACLToken != "" {
|
|
result.ACLToken = b.ACLToken
|
|
}
|
|
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 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 {
|
|
result.DisableRemoteExec = true
|
|
}
|
|
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.AtlasCluster != "" {
|
|
result.AtlasCluster = b.AtlasCluster
|
|
}
|
|
if b.AtlasToken != "" {
|
|
result.AtlasToken = b.AtlasToken
|
|
}
|
|
if b.AtlasACLToken != "" {
|
|
result.AtlasACLToken = b.AtlasACLToken
|
|
}
|
|
if b.AtlasJoin {
|
|
result.AtlasJoin = true
|
|
}
|
|
|
|
if len(b.HTTPAPIResponseHeaders) != 0 {
|
|
if result.HTTPAPIResponseHeaders == nil {
|
|
result.HTTPAPIResponseHeaders = make(map[string]string)
|
|
}
|
|
for field, value := range b.HTTPAPIResponseHeaders {
|
|
result.HTTPAPIResponseHeaders[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
|
|
}
|
|
|
|
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
|
|
}
|
|
|
|
// 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]
|
|
}
|