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Exporting of docker runtime variables as tags #2532

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Exporting of docker runtime variables as tags #2532

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77892f7
Exporting of docker runtime variables as tags
Mar 14, 2017
26dcd09
fix typo in sampleConfig
Mar 14, 2017
9ea24b9
fix formatting
Mar 14, 2017
16116b6
camel case for variables
Mar 15, 2017
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27 changes: 25 additions & 2 deletions plugins/inputs/docker/docker.go
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Original file line number Diff line number Diff line change
Expand Up @@ -25,8 +25,9 @@ type Docker struct {
Endpoint string
ContainerNames []string
Timeout internal.Duration
PerDevice bool `toml:"perdevice"`
Total bool `toml:"total"`
PerDevice bool `toml:"perdevice"`
Total bool `toml:"total"`
EnvToTag []string `toml:"env_to_tag"`

client *client.Client
engine_host string
Expand Down Expand Up @@ -98,6 +99,10 @@ var sampleConfig = `
perdevice = true
## Whether to report for each container total blkio and network stats or not
total = false
## List of varibles from container runtime, e.g.: "docker run -e APPLICATION_NAME=shop -e APP_ID=ver1.2 shop"
## Names of varibles will be transformed to tags, e.g.: container_env_APPLICATION_NAME container_env_APP_ID
## Values of variables will be transformed to values of tags, e.g.: container_env_APPLICATION_NAME=shop, container_env_APP_ID=ver1.2
env_to_tag = [ "APPLICATION_NAME", "APP_ID" ]

`

Expand Down Expand Up @@ -251,6 +256,11 @@ func (d *Docker) gatherContainer(
// Not sure what to do with other names, just take the first.
cname = strings.TrimPrefix(container.Names[0], "/")
}
// getting container configuration ( container.Config )
conf, err := d.client.ContainerInspect(context.TODO(), cname)
if err != nil {
return err
}

// the image name sometimes has a version part, or a private repo
// ie, rabbitmq:3-management or docker.someco.net:4443/rabbitmq:3-management
Expand All @@ -270,6 +280,19 @@ func (d *Docker) gatherContainer(
"container_image": imageName,
"container_version": imageVersion,
}

for _, config_env := range conf.Config.Env {
confNameValue := strings.Split(config_env, "=")
confName := confNameValue[0]
confValue := confNameValue[1]
for _, name := range d.EnvToTag {
if confName == name {
tag := "container_env_" + confName
tags[tag] = confValue
}
}
}

if len(d.ContainerNames) > 0 {
if !sliceContains(cname, d.ContainerNames) {
return nil
Expand Down