본 게시물은 [따배씨] 04. Multi-container Pod 생성하기 영상을 참고하여 작성한 글입니다.

kubernetes 공식 문서 : [Kubernetes docs] Creating a Pod that runs two Containers

문제

create pod

• 작업 클러스터 : hk8s
• Create a pod name lab004 with 3 containers running: nginx, redis, memcached

풀이

1. pod 템플릿 생성

$ kubectl run lab004 --image=nginx --dry-run=client -o yaml > multi.yaml

2. yaml 수정

$ vim multi.yaml

apiVersion: v1
kind: Pod
metadata:
  name: lab004
spec:
  containers:
  - image: nginx
    name: nginx
  - image: redis
    name: redis
  - image: memcached
    name: memcached

3. yaml 적용

$ kubectl apply -f multi.yaml

4. 확인

$ kubectl get pod lab004
NAME     READY   STATUS    RESTARTS   AGE
lab004   3/3     Running   0          35s

$ kubectl describe pod lab004
Name:             lab004
Namespace:        default
Priority:         0
Service Account:  default
Node:             worker/192.168.173.24
Start Time:       Wed, 04 Oct 2023 17:24:08 +0900
Labels:           <none>
Annotations:      cni.projectcalico.org/containerID: 600414dfac52816fef67b7e535eac833c71e613c99aa17bb13e525f9829cbb6d
                  cni.projectcalico.org/podIP: 10.244.171.79/32
                  cni.projectcalico.org/podIPs: 10.244.171.79/32
Status:           Running
IP:               10.244.171.79
IPs:
  IP:  10.244.171.79
Containers:
  nginx:
    Container ID:   cri-o://d98f444bb3509c3d0bbd3862c7ac36be92238728093684964be3e1c21de01762
    Image:          nginx
    Image ID:       docker.io/library/nginx@sha256:32da30332506740a2f7c34d5dc70467b7f14ec67d912703568daff790ab3f755
    Port:           <none>
    Host Port:      <none>
    State:          Running
      Started:      Wed, 04 Oct 2023 17:24:14 +0900
    Ready:          True
    Restart Count:  0
    Environment:    <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-jnldv (ro)
  redis:
    Container ID:   cri-o://b86ab74dc060ac0aedb1f43a053cfb62aad72a5ee721ce025ddf48e13d27700e
    Image:          redis
    Image ID:       docker.io/library/redis@sha256:6f142e895151bb9c05a9452686f5ee1dc1aa873b56b82a33adbb0f5e17c06995
    Port:           <none>
    Host Port:      <none>
    State:          Running
      Started:      Wed, 04 Oct 2023 17:24:27 +0900
    Ready:          True
    Restart Count:  0
    Environment:    <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-jnldv (ro)
  memcached:
    Container ID:   cri-o://1f8e76a81829dca1bdffa0a890e14b88c38258d7b19752aa7901e5066b0ac8ac
    Image:          memcached
    Image ID:       docker.io/library/memcached@sha256:3dfd85e1b83db26310b9e620e775922befa09deabef62b100b7de57a3441489c
    Port:           <none>
    Host Port:      <none>
    State:          Running
      Started:      Wed, 04 Oct 2023 17:24:39 +0900
    Ready:          True
    Restart Count:  0
    Environment:    <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-jnldv (ro)
Conditions:
  Type              Status
  Initialized       True
  Ready             True
  ContainersReady   True
  PodScheduled      True
Volumes:
  kube-api-access-jnldv:
    Type:                    Projected (a volume that contains injected data from multiple sources)
    TokenExpirationSeconds:  3607
    ConfigMapName:           kube-root-ca.crt
    ConfigMapOptional:       <nil>
    DownwardAPI:             true
QoS Class:                   BestEffort
Node-Selectors:              <none>
Tolerations:                 node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
                             node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
  Type    Reason     Age   From               Message
  ----    ------     ----  ----               -------
  Normal  Scheduled  97s   default-scheduler  Successfully assigned default/lab004 to worker
  Normal  Pulling    97s   kubelet            Pulling image "nginx"
  Normal  Pulled     91s   kubelet            Successfully pulled image "nginx" in 5.42622008s
  Normal  Created    91s   kubelet            Created container nginx
  Normal  Started    91s   kubelet            Started container nginx
  Normal  Pulling    91s   kubelet            Pulling image "redis"
  Normal  Pulled     79s   kubelet            Successfully pulled image "redis" in 12.629671578s
  Normal  Created    78s   kubelet            Created container redis
  Normal  Started    78s   kubelet            Started container redis
  Normal  Pulling    78s   kubelet            Pulling image "memcached"
  Normal  Pulled     66s   kubelet            Successfully pulled image "memcached" in 11.935012071s
  Normal  Created    66s   kubelet            Created container memcached
  Normal  Started    66s   kubelet            Started container memcached