128 lines
3.6 KiB
Go
128 lines
3.6 KiB
Go
package helm
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import (
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"bytes"
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"crypto/sha1"
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"fmt"
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"io/ioutil"
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"os"
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"strings"
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"text/template"
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)
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const K = "katenary.io"
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const RELEASE_NAME = "{{ .Release.Name }}"
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const (
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LABEL_ENV_SECRET = K + "/secret-envfiles"
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LABEL_PORT = K + "/ports"
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LABEL_INGRESS = K + "/ingress"
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LABEL_ENV_SERVICE = K + "/env-to-service"
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LABEL_VOL_CM = K + "/configmap-volumes"
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LABEL_HEALTHCHECK = K + "/healthcheck"
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LABEL_SAMEPOD = K + "/same-pod"
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LABEL_EMPTYDIRS = K + "/empty-dirs"
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)
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func GetLabelsDocumentation() string {
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t, _ := template.New("labels").Parse(`
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# Labels
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{{.LABEL_ENV_SECRET | printf "%-33s"}}: set the given file names as a secret instead of configmap
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{{.LABEL_PORT | printf "%-33s"}}: set the port to expose as a service
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{{.LABEL_INGRESS | printf "%-33s"}}: set the port to expose in an ingress
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{{.LABEL_ENV_SERVICE | printf "%-33s"}}: specifies that the environment variable points on a service name
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{{.LABEL_VOL_CM | printf "%-33s"}}: specifies that the volume points on a configmap
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{{.LABEL_SAMEPOD | printf "%-33s"}}: specifies that the pod should be deployed in the same pod than the given service name
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{{.LABEL_EMPTYDIRS | printf "%-33s"}}: specifies that the volume should be "emptyDir" instead of persistentVolumeClaim
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{{.LABEL_HEALTHCHECK | printf "%-33s"}}: specifies that the container should be monitored by a healthcheck, **it overrides the docker-compose healthcheck**.
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{{ printf "%-34s" ""}} You can use these form of label values:
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{{ printf "%-35s" ""}}- "http://[not used address][:port][/path]" to specify an http healthcheck
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{{ printf "%-35s" ""}}- "tcp://[not used address]:port" to specify a tcp healthcheck
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{{ printf "%-35s" ""}}- other string is condidered as a "command" healthcheck
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`)
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buff := bytes.NewBuffer(nil)
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t.Execute(buff, map[string]string{
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"LABEL_ENV_SECRET": LABEL_ENV_SECRET,
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"LABEL_ENV_SERVICE": LABEL_ENV_SERVICE,
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"LABEL_PORT": LABEL_PORT,
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"LABEL_INGRESS": LABEL_INGRESS,
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"LABEL_VOL_CM": LABEL_VOL_CM,
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"LABEL_HEALTHCHECK": LABEL_HEALTHCHECK,
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"LABEL_SAMEPOD": LABEL_SAMEPOD,
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"LABEL_EMPTYDIRS": LABEL_EMPTYDIRS,
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})
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return buff.String()
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}
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var (
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Appname = ""
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Version = "1.0" // should be set from main.Version
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)
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type Kinded interface {
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Get() string
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}
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type Signable interface {
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BuildSHA(filename string)
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}
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type Named interface {
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Name() string
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}
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type Metadata struct {
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Name string `yaml:"name,omitempty"`
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Labels map[string]string `yaml:"labels"`
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Annotations map[string]string `yaml:"annotations,omitempty"`
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}
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func NewMetadata() *Metadata {
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return &Metadata{
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Name: "",
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Labels: make(map[string]string),
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Annotations: make(map[string]string),
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}
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}
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type K8sBase struct {
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ApiVersion string `yaml:"apiVersion"`
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Kind string `yaml:"kind"`
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Metadata *Metadata `yaml:"metadata"`
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}
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func NewBase() *K8sBase {
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b := &K8sBase{
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Metadata: NewMetadata(),
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}
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// add some information of the build
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b.Metadata.Labels[K+"/project"] = GetProjectName()
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b.Metadata.Labels[K+"/release"] = RELEASE_NAME
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b.Metadata.Annotations[K+"/version"] = Version
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return b
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}
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func (k *K8sBase) BuildSHA(filename string) {
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c, _ := ioutil.ReadFile(filename)
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//sum := sha256.Sum256(c)
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sum := sha1.Sum(c)
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k.Metadata.Annotations[K+"/docker-compose-sha1"] = fmt.Sprintf("%x", string(sum[:]))
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}
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func (k *K8sBase) Get() string {
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return k.Kind
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}
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func (k *K8sBase) Name() string {
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return k.Metadata.Name
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}
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func GetProjectName() string {
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if len(Appname) > 0 {
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return Appname
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}
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p, _ := os.Getwd()
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path := strings.Split(p, string(os.PathSeparator))
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return path[len(path)-1]
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}
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