Pod を使ってみる (kubernetes)

kubernetes

Published: 2020-12-27

やったこと

Pod を立ち上げてみます。

確認環境

$ k version
Client Version: version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.2", GitCommit:"c97fe5036ef3df2967d086711e6c0c405941e14b", GitTreeState:"clean", BuildDate:"2019-10-15T19:18:23Z", GoVersion:"go1.12.10", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"19", GitVersion:"v1.19.3", GitCommit:"1e11e4a2108024935ecfcb2912226cedeafd99df", GitTreeState:"clean", BuildDate:"2020-10-14T12:41:49Z", GoVersion:"go1.15.2", Compiler:"gc", Platform:"linux/amd64"}

調査

sample.yaml

apiVersion: v1
kind: Pod
metadata:
  name: sample-pod
spec:
  containers:
    - name: nginx-container
      image: nginx:1.17

マニフェストの適用

$ k apply -f sample.yaml
pod/sample-pod created

Pod取得

$ k get pod sample-pod -o wide
NAME         READY   STATUS    RESTARTS   AGE     IP           NODE             NOMINATED NODE   READINESS GATES
sample-pod   1/1     Running   0          7m22s   10.1.0.132   docker-desktop   <none>           <none>

$ k get pod --help より

-o, –output=”: Output format. One of: json|yaml|wide|name|custom-columns=…|custom-columns-file=…|go-template=…|go-template-file=…|jsonpath=…|jsonpath-file=… See custom columns [http://kubernetes.io/docs/user-guide/kubectl-overview/#custom-columns], golang template [http://golang.org/pkg/text/template/#pkg-overview] and jsonpath template [http://kubernetes.io/docs/user-guide/jsonpath].

コンテナにログイン

$ k exec -it sample-pod bash
root@sample-pod:/# ls
bin  boot  dev	etc  home  lib	lib64  media  mnt  opt	proc  root  run  sbin  srv  sys  tmp  usr  var

ホストOSからコマンド実行

$ k exec -it sample-pod -- ls
bin   dev  home  lib64	mnt  proc  run	 srv  tmp  var
boot  etc  lib	 media	opt  root  sbin  sys  usr