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Add support for configuration static logging fields

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To allow flexibility in log message context information, this changeset
provides the ability to configure static fields that are included in the
context. Such fields can be set via configuration or environment variables.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
This commit is contained in:
Stephen J Day 2015-03-24 17:12:04 -07:00
parent a75f0f26f7
commit ac73963d7e
5 changed files with 89 additions and 12 deletions
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4
configuration/configuration.go
View file

@ -25,6 +25,10 @@ type Configuration struct {
// Formatter overrides the default formatter with another. Options
// include "text", "json" and "logstash".
Formatter string `yaml:"formatter"`
// Fields allows users to specify static string fields to include in
// the logger context.
Fields map[string]string `yaml:"fields"`
}
// Loglevel is the level at which registry operations are logged. This is

20
configuration/configuration_test.go
View file

@ -15,7 +15,14 @@ func Test(t *testing.T) { TestingT(t) }
// configStruct is a canonical example configuration, which should map to configYamlV0_1
var configStruct = Configuration{
Version: "0.1",
Version: "0.1",
Log: struct {
Level Loglevel `yaml:"level"`
Formatter string `yaml:"formatter"`
Fields map[string]string `yaml:"fields"`
}{
Fields: map[string]string{"environment": "test"},
},
Loglevel: "info",
Storage: Storage{
"s3": Parameters{
@ -57,6 +64,9 @@ var configStruct = Configuration{
// configYamlV0_1 is a Version 0.1 yaml document representing configStruct
var configYamlV0_1 = `
version: 0.1
log:
fields:
environment: test
loglevel: info
storage:
s3:
@ -136,6 +146,7 @@ func (suite *ConfigSuite) TestParseSimple(c *C) {
func (suite *ConfigSuite) TestParseInmemory(c *C) {
suite.expectedConfig.Storage = Storage{"inmemory": Parameters{}}
suite.expectedConfig.Reporting = Reporting{}
suite.expectedConfig.Log.Fields = nil
config, err := Parse(bytes.NewReader([]byte(inmemoryConfigYamlV0_1)))
c.Assert(err, IsNil)
@ -150,6 +161,7 @@ func (suite *ConfigSuite) TestParseIncomplete(c *C) {
_, err := Parse(bytes.NewReader([]byte(incompleteConfigYaml)))
c.Assert(err, NotNil)
suite.expectedConfig.Log.Fields = nil
suite.expectedConfig.Storage = Storage{"filesystem": Parameters{"rootdirectory": "/tmp/testroot"}}
suite.expectedConfig.Auth = Auth{"silly": Parameters{"realm": "silly"}}
suite.expectedConfig.Reporting = Reporting{}
@ -303,6 +315,12 @@ func copyConfig(config Configuration) *Configuration {
configCopy.Version = MajorMinorVersion(config.Version.Major(), config.Version.Minor())
configCopy.Loglevel = config.Loglevel
configCopy.Log = config.Log
configCopy.Log.Fields = make(map[string]string, len(config.Log.Fields))
for k, v := range config.Log.Fields {
configCopy.Log.Fields[k] = v
}
configCopy.Storage = Storage{config.Storage.Type(): Parameters{}}
for k, v := range config.Storage.Parameters() {
configCopy.Storage.setParameter(k, v)