Kubernetes Jobs init Container

Question

ich einen Job pod mit 2 INIT Containern Bei pod Erstellung erstellt haben, abgeschlossen meine Arbeit erfolgreich, aber kein Zeichen der init Container

Für mich sollte die Aufgabe haben, warten auf den Abschluss der die 2 init Behälter vor

Mein Job Plan (aus Kubernetes Dokumentation) bei Start, wenn Sie möchten, das Problem

apiVersion: batch/v1 
kind: Job 
metadata: 
    name: pi 
annotations: 
    pod.beta.kubernetes.io/init-containers: '[ 
    { 
     "name": "init-myservice", 
     "image": "busybox", 
     "command": ["sh", "-c", "until nslookup myservice; do echo waiting for myservice; sleep 2; done;"] 
    }, 
    { 
     "name": "init-mydb", 
     "image": "busybox", 
     "command": ["sh", "-c", "until nslookup mydb; do echo waiting for mydb; sleep 2; done;"] 
    } 
    ]' 
spec: 
    template: 
    metadata: 
     name: pi 
    spec: 
     containers: 
     - name: pi 
     image: perl 
     command: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"] 
     restartPolicy: Never 

bei der Überprüfung meiner Arbeit pod

reproduzieren

$ kubectl describe pod pi-v2dn9 
Name: pi-v2dn9 
Namespace: default 
Security Policy: anyuid 
Node: 192.168.111.4/192.168.111.4 
Start Time: Thu, 19 Oct 2017 08:58:39 +0000 
Labels: controller-uid=b3091c77-b4ab-11e7-a3ea-fa163ea1c70b 
job-name=pi 
Status: Succeeded 
IP: 10.131.0.46 
Controllers: Job/pi 
Containers: 
pi: 
Container ID: docker://4bc5bb4c9fc65c1aa1999c3bdc09b01e54043dcdd464410edd0c9cad334c9c67 
Image: perl 
Image ID: docker-pullable://docker.io/perl@sha256:80bd8136a0f3e2c7d202236fc5d8f1192dbfa9ec661ecdd5e96a446e9c7913a8 
Port: 
Command: 
perl 
-Mbignum=bpi 
-wle 
print bpi(2000) 
State: Terminated 
Reason: Completed 
Exit Code: 0 
Started: Thu, 19 Oct 2017 08:58:53 +0000 
Finished: Thu, 19 Oct 2017 08:58:58 +0000 
Ready: False 
Restart Count: 0 
Volume Mounts: 
/var/run/secrets/kubernetes.io/serviceaccount from default-token-fxdf1 (ro) 
Environment Variables: 
Conditions: 
Type Status 
Initialized True 
Ready False 
PodScheduled True 
Volumes: 
default-token-fxdf1: 
Type: Secret (a volume populated by a Secret) 
SecretName: default-token-fxdf1 
QoS Class: BestEffort 
Tolerations: 
Events: 
FirstSeen LastSeen Count From SubObjectPath Type Reason Message 

26s 26s 1 {default-scheduler } Normal Scheduled Successfully assigned pi-v2dn9 to 192.168.111.4 
25s 25s 1 {kubelet 192.168.111.4} spec.containers{pi} Normal Pulling pulling image "perl" 
12s 12s 1 {kubelet 192.168.111.4} spec.containers{pi} Normal Pulled Successfully pulled image "perl" 
12s 12s 1 {kubelet 192.168.111.4} spec.containers{pi} Normal Created Created container with docker id 4bc5bb4c9fc6; Security:[seccomp=unconfined] 
12s 12s 1 {kubelet 192.168.111.4} spec.containers{pi} Normal Started Started container with docker id 4bc5bb4c9fc6 

KEIN ZEICHEN DER INIT CONTAINER !!!

Meine Umwelt: --- Kubernetes Version (Verwendung kubectl Version): Client-Version: version.Info {Dur: "1", Minor: "5", GitVersion: "v1.5.2 + 43a9be4", GitCommit : "43a9be4", GitTreeState: "clean", BuildDatum: "2017-04-20T15: 38: 11Z", GoVersion: "go1.7.4", Compiler: "gc", Plattform: "linux/amd64"} Server Version : version.Info {Major: "1", Minor: "5", GitVersion: "v1.5.2 + 43a9be4", GitCommit: "43a9be4", GitTreeState: "sauber", BuildDate: "2017-04-20T15: 38: 11Z“, GoVersion: "go1.7.4", Compiler: "gc", Plattform: "linux/amd64"}

ich bin in einem Cluster von Openstack arbeitet

OS ist Red Hat Enterprise Linux Server 7.3 (Maipo)

Vielen Dank im Voraus für jede Hilfe.

Answer 1

Versuchen Sie, die Anmerkung der Spezifikation Vorlage anstatt das Job-Objekt hinzufügen:

apiVersion: batch/v1 
kind: Job 
metadata: 
    name: pi 
spec: 
    template: 
    metadata: 
     name: pi 
    annotations: 
     pod.beta.kubernetes.io/init-containers: '[ 
     { 
      "name": "init-myservice", 
      "image": "busybox", 
      "command": ["sh", "-c", "until nslookup myservice; do echo waiting for myservice; sleep 2; done;"] 
     }, 
     { 
      "name": "init-mydb", 
      "image": "busybox", 
      "command": ["sh", "-c", "until nslookup mydb; do echo waiting for mydb; sleep 2; done;"] 
     } 
     ]' 
    spec: 
     containers: 
     - name: pi 
     image: perl 
     command: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"] 
     restartPolicy: Never 

Answer 2

Ihre Anmerkungen an der falschen Stelle sind. Sie sollten speziell für Init-Container in den Pod-Metadaten definiert werden, während Sie sie den Job-Metadaten hinzugefügt haben.

apiVersion: batch/v1 
kind: Job 
metadata: 
    name: pi 
spec: 
    template: 
    metadata: 
     name: pi 
     annotations: 
     pod.beta.kubernetes.io/init-containers: '[ 
      { 
      "name": "init-myservice", 
      "image": "busybox", 
      "command": ["sh", "-c", "until nslookup myservice; do echo waiting for myservice; sleep 2; done;"] 
      }, 
      { 
      "name": "init-mydb", 
      "image": "busybox", 
      "command": ["sh", "-c", "until nslookup mydb; do echo waiting for mydb; sleep 2; done;"] 
      } 
     ]' 
    spec: 
     containers: 
     - name: pi 
     image: perl 
     command: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"] 
     restartPolicy: Never