open-consul/agent/consul/config_endpoint.go

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package consul
import (
"fmt"
"time"
metrics "github.com/armon/go-metrics"
"github.com/hashicorp/consul/acl"
"github.com/hashicorp/consul/agent/consul/discoverychain"
"github.com/hashicorp/consul/agent/consul/state"
"github.com/hashicorp/consul/agent/structs"
memdb "github.com/hashicorp/go-memdb"
"github.com/mitchellh/copystructure"
)
// The ConfigEntry endpoint is used to query centralized config information
type ConfigEntry struct {
srv *Server
}
// Apply does an upsert of the given config entry.
Centralized Config CLI (#5731) * Add HTTP endpoints for config entry management * Finish implementing decoding in the HTTP Config entry apply endpoint * Add CAS operation to the config entry apply endpoint Also use this for the bootstrapping and move the config entry decoding function into the structs package. * First pass at the API client for the config entries * Fixup some of the ConfigEntry APIs Return a singular response object instead of a list for the ConfigEntry.Get RPC. This gets plumbed through the HTTP API as well. Dont return QueryMeta in the JSON response for the config entry listing HTTP API. Instead just return a list of config entries. * Minor API client fixes * Attempt at some ConfigEntry api client tests These don’t currently work due to weak typing in JSON * Get some of the api client tests passing * Implement reflectwalk magic to correct JSON encoding a ProxyConfigEntry Also added a test for the HTTP endpoint that exposes the problem. However, since the test doesn’t actually do the JSON encode/decode its still failing. * Move MapWalk magic into a binary marshaller instead of JSON. * Add a MapWalk test * Get rid of unused func * Get rid of unused imports * Fixup some tests now that the decoding from msgpack coerces things into json compat types * Stub out most of the central config cli Fully implement the config read command. * Basic config delete command implementation * Implement config write command * Implement config list subcommand Not entirely sure about the output here. Its basically the read output indented with a line specifying the kind/name of each type which is also duplicated in the indented output. * Update command usage * Update some help usage formatting * Add the connect enable helper cli command * Update list command output * Rename the config entry API client methods. * Use renamed apis * Implement config write tests Stub the others with the noTabs tests. * Change list output format Now just simply output 1 line per named config * Add config read tests * Add invalid args write test. * Add config delete tests * Add config list tests * Add connect enable tests * Update some CLI commands to use CAS ops This also modifies the HTTP API for a write op to return a boolean indicating whether the value was written or not. * Fix up the HTTP API CAS tests as I realized they weren’t testing what they should. * Update config entry rpc tests to properly test CAS * Fix up a few more tests * Fix some tests that using ConfigEntries.Apply * Update config_write_test.go * Get rid of unused import
2019-04-30 23:27:16 +00:00
func (c *ConfigEntry) Apply(args *structs.ConfigEntryRequest, reply *bool) error {
if done, err := c.srv.forward("ConfigEntry.Apply", args, args, reply); done {
return err
}
defer metrics.MeasureSince([]string{"config_entry", "apply"}, time.Now())
// Normalize and validate the incoming config entry.
if err := args.Entry.Normalize(); err != nil {
return err
}
if err := args.Entry.Validate(); err != nil {
return err
}
// Fetch the ACL token, if any.
rule, err := c.srv.ResolveToken(args.Token)
if err != nil {
return err
}
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if rule != nil && !args.Entry.CanWrite(rule) {
return acl.ErrPermissionDenied
}
Centralized Config CLI (#5731) * Add HTTP endpoints for config entry management * Finish implementing decoding in the HTTP Config entry apply endpoint * Add CAS operation to the config entry apply endpoint Also use this for the bootstrapping and move the config entry decoding function into the structs package. * First pass at the API client for the config entries * Fixup some of the ConfigEntry APIs Return a singular response object instead of a list for the ConfigEntry.Get RPC. This gets plumbed through the HTTP API as well. Dont return QueryMeta in the JSON response for the config entry listing HTTP API. Instead just return a list of config entries. * Minor API client fixes * Attempt at some ConfigEntry api client tests These don’t currently work due to weak typing in JSON * Get some of the api client tests passing * Implement reflectwalk magic to correct JSON encoding a ProxyConfigEntry Also added a test for the HTTP endpoint that exposes the problem. However, since the test doesn’t actually do the JSON encode/decode its still failing. * Move MapWalk magic into a binary marshaller instead of JSON. * Add a MapWalk test * Get rid of unused func * Get rid of unused imports * Fixup some tests now that the decoding from msgpack coerces things into json compat types * Stub out most of the central config cli Fully implement the config read command. * Basic config delete command implementation * Implement config write command * Implement config list subcommand Not entirely sure about the output here. Its basically the read output indented with a line specifying the kind/name of each type which is also duplicated in the indented output. * Update command usage * Update some help usage formatting * Add the connect enable helper cli command * Update list command output * Rename the config entry API client methods. * Use renamed apis * Implement config write tests Stub the others with the noTabs tests. * Change list output format Now just simply output 1 line per named config * Add config read tests * Add invalid args write test. * Add config delete tests * Add config list tests * Add connect enable tests * Update some CLI commands to use CAS ops This also modifies the HTTP API for a write op to return a boolean indicating whether the value was written or not. * Fix up the HTTP API CAS tests as I realized they weren’t testing what they should. * Update config entry rpc tests to properly test CAS * Fix up a few more tests * Fix some tests that using ConfigEntries.Apply * Update config_write_test.go * Get rid of unused import
2019-04-30 23:27:16 +00:00
if args.Op != structs.ConfigEntryUpsert && args.Op != structs.ConfigEntryUpsertCAS {
args.Op = structs.ConfigEntryUpsert
}
resp, err := c.srv.raftApply(structs.ConfigEntryRequestType, args)
if err != nil {
return err
}
if respErr, ok := resp.(error); ok {
return respErr
}
Centralized Config CLI (#5731) * Add HTTP endpoints for config entry management * Finish implementing decoding in the HTTP Config entry apply endpoint * Add CAS operation to the config entry apply endpoint Also use this for the bootstrapping and move the config entry decoding function into the structs package. * First pass at the API client for the config entries * Fixup some of the ConfigEntry APIs Return a singular response object instead of a list for the ConfigEntry.Get RPC. This gets plumbed through the HTTP API as well. Dont return QueryMeta in the JSON response for the config entry listing HTTP API. Instead just return a list of config entries. * Minor API client fixes * Attempt at some ConfigEntry api client tests These don’t currently work due to weak typing in JSON * Get some of the api client tests passing * Implement reflectwalk magic to correct JSON encoding a ProxyConfigEntry Also added a test for the HTTP endpoint that exposes the problem. However, since the test doesn’t actually do the JSON encode/decode its still failing. * Move MapWalk magic into a binary marshaller instead of JSON. * Add a MapWalk test * Get rid of unused func * Get rid of unused imports * Fixup some tests now that the decoding from msgpack coerces things into json compat types * Stub out most of the central config cli Fully implement the config read command. * Basic config delete command implementation * Implement config write command * Implement config list subcommand Not entirely sure about the output here. Its basically the read output indented with a line specifying the kind/name of each type which is also duplicated in the indented output. * Update command usage * Update some help usage formatting * Add the connect enable helper cli command * Update list command output * Rename the config entry API client methods. * Use renamed apis * Implement config write tests Stub the others with the noTabs tests. * Change list output format Now just simply output 1 line per named config * Add config read tests * Add invalid args write test. * Add config delete tests * Add config list tests * Add connect enable tests * Update some CLI commands to use CAS ops This also modifies the HTTP API for a write op to return a boolean indicating whether the value was written or not. * Fix up the HTTP API CAS tests as I realized they weren’t testing what they should. * Update config entry rpc tests to properly test CAS * Fix up a few more tests * Fix some tests that using ConfigEntries.Apply * Update config_write_test.go * Get rid of unused import
2019-04-30 23:27:16 +00:00
if respBool, ok := resp.(bool); ok {
*reply = respBool
}
return nil
}
// Get returns a single config entry by Kind/Name.
func (c *ConfigEntry) Get(args *structs.ConfigEntryQuery, reply *structs.ConfigEntryResponse) error {
if done, err := c.srv.forward("ConfigEntry.Get", args, args, reply); done {
return err
}
defer metrics.MeasureSince([]string{"config_entry", "get"}, time.Now())
// Fetch the ACL token, if any.
rule, err := c.srv.ResolveToken(args.Token)
if err != nil {
return err
}
// Create a dummy config entry to check the ACL permissions.
lookupEntry, err := structs.MakeConfigEntry(args.Kind, args.Name)
if err != nil {
return err
}
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if rule != nil && !lookupEntry.CanRead(rule) {
return acl.ErrPermissionDenied
}
return c.srv.blockingQuery(
&args.QueryOptions,
&reply.QueryMeta,
func(ws memdb.WatchSet, state *state.Store) error {
index, entry, err := state.ConfigEntry(ws, args.Kind, args.Name)
if err != nil {
return err
}
reply.Index = index
if entry == nil {
return nil
}
reply.Entry = entry
return nil
})
}
// List returns all the config entries of the given kind. If Kind is blank,
// all existing config entries will be returned.
func (c *ConfigEntry) List(args *structs.ConfigEntryQuery, reply *structs.IndexedConfigEntries) error {
if done, err := c.srv.forward("ConfigEntry.List", args, args, reply); done {
return err
}
defer metrics.MeasureSince([]string{"config_entry", "list"}, time.Now())
// Fetch the ACL token, if any.
rule, err := c.srv.ResolveToken(args.Token)
if err != nil {
return err
}
if args.Kind != "" && !structs.ValidateConfigEntryKind(args.Kind) {
return fmt.Errorf("invalid config entry kind: %s", args.Kind)
}
return c.srv.blockingQuery(
&args.QueryOptions,
&reply.QueryMeta,
func(ws memdb.WatchSet, state *state.Store) error {
index, entries, err := state.ConfigEntriesByKind(ws, args.Kind)
if err != nil {
return err
}
// Filter the entries returned by ACL permissions.
filteredEntries := make([]structs.ConfigEntry, 0, len(entries))
for _, entry := range entries {
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if rule != nil && !entry.CanRead(rule) {
continue
}
filteredEntries = append(filteredEntries, entry)
}
reply.Kind = args.Kind
reply.Index = index
reply.Entries = filteredEntries
return nil
})
}
// ListAll returns all the known configuration entries
func (c *ConfigEntry) ListAll(args *structs.DCSpecificRequest, reply *structs.IndexedGenericConfigEntries) error {
if done, err := c.srv.forward("ConfigEntry.ListAll", args, args, reply); done {
return err
}
defer metrics.MeasureSince([]string{"config_entry", "listAll"}, time.Now())
// Fetch the ACL token, if any.
rule, err := c.srv.ResolveToken(args.Token)
if err != nil {
return err
}
return c.srv.blockingQuery(
&args.QueryOptions,
&reply.QueryMeta,
func(ws memdb.WatchSet, state *state.Store) error {
index, entries, err := state.ConfigEntries(ws)
if err != nil {
return err
}
// Filter the entries returned by ACL permissions.
filteredEntries := make([]structs.ConfigEntry, 0, len(entries))
for _, entry := range entries {
if rule != nil && !entry.CanRead(rule) {
continue
}
filteredEntries = append(filteredEntries, entry)
}
reply.Entries = filteredEntries
reply.Index = index
return nil
})
}
// Delete deletes a config entry.
func (c *ConfigEntry) Delete(args *structs.ConfigEntryRequest, reply *struct{}) error {
if done, err := c.srv.forward("ConfigEntry.Delete", args, args, reply); done {
return err
}
defer metrics.MeasureSince([]string{"config_entry", "delete"}, time.Now())
// Normalize the incoming entry.
if err := args.Entry.Normalize(); err != nil {
return err
}
// Fetch the ACL token, if any.
rule, err := c.srv.ResolveToken(args.Token)
if err != nil {
return err
}
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if rule != nil && !args.Entry.CanWrite(rule) {
return acl.ErrPermissionDenied
}
args.Op = structs.ConfigEntryDelete
resp, err := c.srv.raftApply(structs.ConfigEntryRequestType, args)
if err != nil {
return err
}
if respErr, ok := resp.(error); ok {
return respErr
}
return nil
}
// ResolveServiceConfig
func (c *ConfigEntry) ResolveServiceConfig(args *structs.ServiceConfigRequest, reply *structs.ServiceConfigResponse) error {
if done, err := c.srv.forward("ConfigEntry.ResolveServiceConfig", args, args, reply); done {
return err
}
defer metrics.MeasureSince([]string{"config_entry", "resolve_service_config"}, time.Now())
// Fetch the ACL token, if any.
rule, err := c.srv.ResolveToken(args.Token)
if err != nil {
return err
}
if rule != nil && !rule.ServiceRead(args.Name) {
return acl.ErrPermissionDenied
}
return c.srv.blockingQuery(
&args.QueryOptions,
&reply.QueryMeta,
func(ws memdb.WatchSet, state *state.Store) error {
reply.MeshGateway.Mode = structs.MeshGatewayModeDefault
// Pass the WatchSet to both the service and proxy config lookups. If either is updated
// during the blocking query, this function will be rerun and these state store lookups
// will both be current.
index, serviceEntry, err := state.ConfigEntry(ws, structs.ServiceDefaults, args.Name)
if err != nil {
return err
}
var serviceConf *structs.ServiceConfigEntry
var ok bool
if serviceEntry != nil {
serviceConf, ok = serviceEntry.(*structs.ServiceConfigEntry)
if !ok {
return fmt.Errorf("invalid service config type %T", serviceEntry)
}
}
_, proxyEntry, err := state.ConfigEntry(ws, structs.ProxyDefaults, structs.ProxyConfigGlobal)
if err != nil {
return err
}
var proxyConf *structs.ProxyConfigEntry
if proxyEntry != nil {
proxyConf, ok = proxyEntry.(*structs.ProxyConfigEntry)
if !ok {
return fmt.Errorf("invalid proxy config type %T", proxyEntry)
}
// Apply the proxy defaults to the sidecar's proxy config
mapCopy, err := copystructure.Copy(proxyConf.Config)
if err != nil {
return fmt.Errorf("failed to copy global proxy-defaults: %v", err)
}
reply.ProxyConfig = mapCopy.(map[string]interface{})
reply.MeshGateway = proxyConf.MeshGateway
}
reply.Index = index
if serviceConf != nil {
if serviceConf.MeshGateway.Mode != structs.MeshGatewayModeDefault {
reply.MeshGateway.Mode = serviceConf.MeshGateway.Mode
}
if serviceConf.Protocol != "" {
if reply.ProxyConfig == nil {
reply.ProxyConfig = make(map[string]interface{})
}
reply.ProxyConfig["protocol"] = serviceConf.Protocol
}
}
// Apply the upstream protocols to the upstream configs
for _, upstream := range args.Upstreams {
_, upstreamEntry, err := state.ConfigEntry(ws, structs.ServiceDefaults, upstream)
if err != nil {
return err
}
var upstreamConf *structs.ServiceConfigEntry
var ok bool
if upstreamEntry != nil {
upstreamConf, ok = upstreamEntry.(*structs.ServiceConfigEntry)
if !ok {
return fmt.Errorf("invalid service config type %T", upstreamEntry)
}
}
// Nothing to configure if a protocol hasn't been set.
if upstreamConf == nil || upstreamConf.Protocol == "" {
continue
}
if reply.UpstreamConfigs == nil {
reply.UpstreamConfigs = make(map[string]map[string]interface{})
}
reply.UpstreamConfigs[upstream] = map[string]interface{}{
"protocol": upstreamConf.Protocol,
}
}
return nil
})
}
func (c *ConfigEntry) ReadDiscoveryChain(args *structs.DiscoveryChainRequest, reply *structs.DiscoveryChainResponse) error {
if done, err := c.srv.forward("ConfigEntry.ReadDiscoveryChain", args, args, reply); done {
return err
}
defer metrics.MeasureSince([]string{"config_entry", "read_discovery_chain"}, time.Now())
// Fetch the ACL token, if any.
rule, err := c.srv.ResolveToken(args.Token)
if err != nil {
return err
}
if rule != nil && !rule.ServiceRead(args.Name) {
return acl.ErrPermissionDenied
}
if args.Name == "" {
return fmt.Errorf("Must provide service name")
}
const currentNamespace = "default"
return c.srv.blockingQuery(
&args.QueryOptions,
&reply.QueryMeta,
func(ws memdb.WatchSet, state *state.Store) error {
index, entries, err := state.ReadDiscoveryChainConfigEntries(ws, args.Name)
if err != nil {
return err
}
// Then we compile it into something useful.
chain, err := discoverychain.Compile(discoverychain.CompileRequest{
ServiceName: args.Name,
CurrentNamespace: currentNamespace,
CurrentDatacenter: c.srv.config.Datacenter,
InferDefaults: true,
Entries: entries,
})
if err != nil {
return err
}
reply.Index = index
reply.ConfigEntries = entries
reply.Chain = chain
return nil
})
}