【1】 マニフェストファイル（AP）
◆ Pod
- Pod作成時
ContainerCreatingの場合$ kubectl describe pod [Pod名]で確認
pod.yml
apiVersion: v1
kind: Pod
metadata:
name: sample-app
namespace: default
labels:
app: test
type: application
spec:
containers:
- name: sample-app
image: sample-app:v1.0
command:
- /bin/bash
args:
- -c
- rails db:migrate && rails server
◆ Service
service.yml
apiVersion: v1
kind: Service
metadata:
name: app-service
spec:
ports:
- port: 3000
targetPort: 3000
◆ Deployment
Deployment.yml
apiVersion: apps/v1
kind: Deployment
metadata:
name: sample-deployment
spec:
selector:
matchLabels: #templateのlabelと一致させる
app: test
replicas: 2
strategy:
rollingUpdate: #基本はRollingUpdate一択
maxSurge: 1
maxUnavailable: 1
revesionHistoryLimit: 12 #ReplicaSetの履歴保存数
template:
metadata:
labels: #5行上のmatchLabelsと一致させる
app: test
spec:
containers:
- name: sample-app
image: sample-app:v1.0
ports:
- containerPort: 3000
◆ ConfigMap
configmap.yml
apiVersion: v1
kind: ConfigMap
metadata:
name: config #configMapKeyRefで使用
data:
sample.cfg: |
username: test #configMapKeyRefで使用
---
apiVersion: v1
kind: Pod
metadata:
name: sample
spec:
containers:
- name: sample-app
image: sample-app:v1.0
env:
- name: TYPE
valueFrom:
configMapKeyRef:
name: config #上記configMapのmetadata参照
key: username #上記configMapのdataプロパティ参照
◆ Ingress
ingress.yml
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: sample
spec:
rules:
- http:
paths:
- path: / #どのパスにリダイレクトするか設定
backend:
serviceName: sample #Serviceマニフェストのmetadata参照
servicePort: 80
【2】 マニフェストファイル（DB）
◆ Pod
pod.yml
apiVersion: v1
kind: Pod
metadata:
name: sample-db
spec:
containers:
- name: postgresql
image: sample-db:v1.0
volumeMounts:
- mountPath: "/var/lib/postgresql/data"
name: db
volumes:
- name: db
persistentVolumeClaim:
claimName: sample-pvc
◆ PersistentVolume PersistentVolumeClaim
pv-pvc.yml
apiVersion: v1
kind: PersistentVolume
metadata:
name: sample-pv
spec:
capacity: #ストレージ容量
storage: 1Gi
accessModes:
- ReadWriteMany #他はReadWriteOnce, ReadOnlyMany
storageClassName: standard #ストレージの種類
hostpath:
path: "/tmp"
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: sample-pvc
spec:
accessModes:
- ReadWriteMany #他はReadWriteOnce, ReadOnlyMany
resources:
requests:
storage: 1Gi #ストレージ容量
storageClassName: standard #ストレージの種類
【3】 pod操作
◆ pod作成
$ kubectl apply -f pod.yml
◆ pod一覧確認
$ kubectl get pod
NAME READY STATUS RESTARTS AGE
sample 1/1 Running 0 3s
◆ pod削除
$ kubectl delete pod sample
$ kubectl delete -f pod.yml
◆ podログイン
$ kubectl exec -it sample sh
◆ podとのファイル転送
$ kubectl cp sample:/root/hello.txt ./hello.txt
◆ pod詳細表示
$ kubectl describe pod/sample
◆ podログ確認
$ kubectl logs pod/sample
◆ IPアドレス確認
$ kubectl get pod -o wide
【4】 kubectlインストール
$ brew install kubectl
$ brew install kubernetes-cli
$ kubectl version --client