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Add Consul & BoltDB datasource support (#178)
* Add libkv support * Add vendoring
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,185 @@ | ||
| package libkv | ||
|
|
||
| import ( | ||
| "crypto/tls" | ||
| "errors" | ||
| "log" | ||
| "net/url" | ||
| "strconv" | ||
| "time" | ||
|
|
||
| "github.com/blang/vfs" | ||
| "github.com/docker/libkv" | ||
| "github.com/docker/libkv/store" | ||
| "github.com/docker/libkv/store/boltdb" | ||
| "github.com/docker/libkv/store/consul" | ||
| "github.com/hairyhenderson/gomplate/env" | ||
| consulapi "github.com/hashicorp/consul/api" | ||
| ) | ||
|
|
||
| // logFatal is defined so log.Fatal calls can be overridden for testing | ||
| var logFatal = log.Fatal | ||
|
|
||
| // LibKV - | ||
| type LibKV struct { | ||
| store store.Store | ||
| fs vfs.Filesystem | ||
| } | ||
|
|
||
| type SetupDetails struct { | ||
| sourceType store.Backend | ||
| client string | ||
| options *store.Config | ||
| } | ||
|
|
||
| // New - instantiate a new | ||
| func New(url *url.URL) *LibKV { | ||
| var setup *SetupDetails | ||
| var err error | ||
|
|
||
| if url.Scheme == "consul" || url.Scheme == "consul+http" { | ||
| setup, err = setupConsul(url, false) | ||
| if err != nil { | ||
| logFatal("consul setup error", err) | ||
| } | ||
| } | ||
| if url.Scheme == "consul+https" { | ||
| setup, err = setupConsul(url, true) | ||
| if err != nil { | ||
| logFatal("consul setup error", err) | ||
| } | ||
| } | ||
| if url.Scheme == "boltdb" { | ||
| setup, err = setupBoltDB(url, false) | ||
| if err != nil { | ||
| logFatal("boltdb setup error", err) | ||
| } | ||
| } | ||
|
|
||
| if setup.client == "" { | ||
| logFatal("missing client location") | ||
| } | ||
|
|
||
| kv, err := libkv.NewStore( | ||
| setup.sourceType, | ||
| []string{setup.client}, | ||
| setup.options, | ||
| ) | ||
| if err != nil { | ||
| logFatal("Cannot create store", err) | ||
| } | ||
|
|
||
| return &LibKV{kv, nil} | ||
| } | ||
|
|
||
| func setupConsul(url *url.URL, enableTLS bool) (*SetupDetails, error) { | ||
| setup := &SetupDetails{} | ||
| consul.Register() | ||
| setup.sourceType = store.CONSUL | ||
| setup.client = env.Getenv("CONSUL_HTTP_ADDR", "localhost:8500") | ||
| setup.options = &store.Config{} | ||
| if timeout := env.Getenv("CONSUL_TIMEOUT", ""); timeout != "" { | ||
| num, err := strconv.ParseInt(timeout, 10, 16) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| setup.options.ConnectionTimeout = time.Duration(num) * time.Second | ||
| } | ||
| if ssl := env.Getenv("CONSUL_HTTP_SSL", ""); ssl != "" { | ||
| enabled, err := strconv.ParseBool(ssl) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| enableTLS = enabled | ||
| } | ||
| if enableTLS { | ||
| config, err := setupTLS("CONSUL") | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| setup.options.TLS = config | ||
| } | ||
| return setup, nil | ||
| } | ||
|
|
||
| func setupBoltDB(url *url.URL, enableTLS bool) (*SetupDetails, error) { | ||
| setup := &SetupDetails{} | ||
| boltdb.Register() | ||
| setup.sourceType = store.BOLTDB | ||
| setup.client = url.Path | ||
| setup.options = &store.Config{} | ||
| setup.options.Bucket = url.Fragment | ||
| if setup.options.Bucket == "" { | ||
| return nil, errors.New("missing bucket") | ||
| } | ||
| if timeout := env.Getenv("BOLTDB_TIMEOUT", ""); timeout != "" { | ||
| num, err := strconv.ParseInt(timeout, 10, 16) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| setup.options.ConnectionTimeout = time.Duration(num) * time.Second | ||
| } | ||
| if persist := env.Getenv("BOLTDB_PERSIST", ""); persist != "" { | ||
| enabled, err := strconv.ParseBool(persist) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| setup.options.PersistConnection = enabled | ||
| } | ||
| return setup, nil | ||
| } | ||
|
|
||
| func setupTLS(prefix string) (*tls.Config, error) { | ||
| tlsConfig := &consulapi.TLSConfig{} | ||
|
|
||
| if v := env.Getenv(prefix+"_TLS_SERVER_NAME", ""); v != "" { | ||
| tlsConfig.Address = v | ||
| } | ||
| if v := env.Getenv(prefix+"_CACERT", ""); v != "" { | ||
| tlsConfig.CAFile = v | ||
| } | ||
| if v := env.Getenv(prefix+"_CAPATH", ""); v != "" { | ||
| tlsConfig.CAPath = v | ||
| } | ||
| if v := env.Getenv(prefix+"_CLIENT_CERT", ""); v != "" { | ||
| tlsConfig.CertFile = v | ||
| } | ||
| if v := env.Getenv(prefix+"_CLIENT_KEY", ""); v != "" { | ||
| tlsConfig.KeyFile = v | ||
| } | ||
| if v := env.Getenv(prefix+"_HTTP_SSL_VERIFY", ""); v != "" { | ||
| verify, err := strconv.ParseBool(v) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if !verify { | ||
| tlsConfig.InsecureSkipVerify = true | ||
| } | ||
| } | ||
|
|
||
| config, err := consulapi.SetupTLSConfig(tlsConfig) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return config, nil | ||
| } | ||
|
|
||
| // Login - | ||
| func (kv *LibKV) Login() error { | ||
| return nil | ||
| } | ||
|
|
||
| // Logout - | ||
| func (kv *LibKV) Logout() { | ||
| } | ||
|
|
||
| // Read - | ||
| func (kv *LibKV) Read(path string) ([]byte, error) { | ||
| data, err := kv.store.Get(path) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return data.Value, nil | ||
| } |
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