K8S conffigMap

使用目录创建 ConfigMap

cd ~
mkdir ConfigMap
cd ConfigMap/dir -p
cd ConfigMap/dir

vi game.propertis
eneies=aliens
lives=3
enemies.cheat=true
enemies.cheat.level=noGoodRotten
secret.code.passphrase=UUDDLRLRBABAS
secret.code.allowed=true
secret.code.lives=30

vi ui.properties
color.good=purple
color.bad=yellow
allow.textmode=true
how.nice.to.look=fairlyNice

# 以目录形式创建 ConfigMap
kubectl create configmap game-config --from-file=../dir/

# 查看 ConfigMap
kubectl get cm
NAME          DATA   AGE
game-config   2      6s

# 查看 ConfigMap 的详细信息
kubectl get cm -o yaml
apiVersion: v1
items:
- apiVersion: v1
  data:
    game.propertis: |
      eneies=aliens
      lives=3
      enemies.cheat=true
      enemies.cheat.level=noGoodRotten
      secret.code.passphrase=UUDDLRLRBABAS
      secret.code.allowed=true
      secret.code.lives=30
    ui.properties: |
      color.good=purple
      color.bad=yellow
      allow.textmode=true
      how.nice.to.look=fairlyNice
  kind: ConfigMap
  metadata:
    creationTimestamp: "2020-03-21T08:08:52Z"
    name: game-config
    namespace: default
    resourceVersion: "85704"
    selfLink: /api/v1/namespaces/default/configmaps/game-config
    uid: 83af28e4-b458-4ce0-a7bf-f1f60eff40bd
kind: List
metadata:
  resourceVersion: ""
  selfLink: ""

# 查看 ConfigMap 的详细信息
kubectl describe cm game-config
Name:         game-config
Namespace:    default
Labels:       <none>
Annotations:  <none>

Data
====
game.propertis:
----
eneies=aliens
lives=3
enemies.cheat=true
enemies.cheat.level=noGoodRotten
secret.code.passphrase=UUDDLRLRBABAS
secret.code.allowed=true
secret.code.lives=30

ui.properties:
----
color.good=purple
color.bad=yellow
allow.textmode=true
how.nice.to.look=fairlyNice

Events:  <none>

使用文件创建 ConfigMap

kubectl create configmap game-config-2 --from-file=game.propertis 

# 查看 ConfigMap
kubectl get cm
NAME            DATA   AGE
game-config     2      2m46s
game-config-2   1      3s

# 查看 ConfigMap 的详细信息
kubectl get configmaps game-config-2
NAME            DATA   AGE
game-config-2   1      27s

# 查看 ConfigMap 的详细信息
kubectl get configmaps game-config-2 -o yaml
apiVersion: v1
data:
  game.propertis: |
    eneies=aliens
    lives=3
    enemies.cheat=true
    enemies.cheat.level=noGoodRotten
    secret.code.passphrase=UUDDLRLRBABAS
    secret.code.allowed=true
    secret.code.lives=30
kind: ConfigMap
metadata:
  creationTimestamp: "2020-03-21T08:11:35Z"
  name: game-config-2
  namespace: default
  resourceVersion: "85959"
  selfLink: /api/v1/namespaces/default/configmaps/game-config-2
  uid: df1e50e8-70ef-4675-8b05-2316c48bea6d

使用字面值创建 ConfigMap

kubectl create configmap special-config --from-literal=special.how=very --from-literal=special.type=charm

# 查看 ConfigMap 的详细信息
kubectl get configmaps special-config -o yaml
apiVersion: v1
data:
  special.how: very
  special.type: charm
kind: ConfigMap
metadata:
  creationTimestamp: "2020-03-21T08:12:58Z"
  name: special-config
  namespace: default
  resourceVersion: "86096"
  selfLink: /api/v1/namespaces/default/configmaps/special-config
  uid: cd48e00b-df97-4631-962a-b5404c039f03

使用 ConfigMap 来代替环境变量

kubectl delete cm game-config game-config-2 special-config

# 创建 ConfigMap
vi special-env-config.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: special-config
data:
  special.how: very
  special.type: charm

---
apiVersion: v1
kind: ConfigMap
metadata:
  name: env-config
data:
  log_level: INFO

kubectl apply -f special-env-config.yaml 

kubectl get cm
NAME             DATA   AGE
env-config       1      19m
special-config   2      19m

vi dapi-test-pod.yaml
apiVersion: v1
kind: Pod
metadata:
  name: dapi-test-pod
spec:
  containers:
  - name: test-container
    image: wangyanglinux/myapp:v1
    command: [ "/bin/sh", "-c", "env" ]
    env:
      - name: SPECIAL_LEVEL_KEY
        valueFrom:
          configMapKeyRef:
            name: special-config
            key: special.how
      - name: SPECIAL_TYPE_KEY
        valueFrom:
          configMapKeyRef:
            name: special-config
            key: special.type
    envFrom:
     - configMapRef:
         name: special-config
  restartPolicy: Never

kubectl apply -f dapi-test-pod.yaml 

kubectl get pod
NAME            READY   STATUS      RESTARTS   AGE
dapi-test-pod   0/1     Completed   0          6m

kubectl logs dapi-test-pod|grep SPECIAL
SPECIAL_TYPE_KEY=charm
SPECIAL_LEVEL_KEY=very

使用envFrom会在Pod环境中将ConfigMap中所有定义的key=value自动生成为环境变量

使用 ConfigMap 设置命令行参数

kubectl delete -f dapi-test-pod.yaml

vi dapi-test-pod2.yaml 
apiVersion: v1
kind: Pod
metadata:
  name: dapi-test-pod
spec:
  containers:
  - name: test-container
    image: wangyanglinux/myapp:v1
    command: [ "/bin/sh", "-c", "echo $(SPECIAL_LEVEL_KEY) $(SPECIAL_TYPE_KEY)" ]
    env:
      - name: SPECIAL_LEVEL_KEY
        valueFrom:
          configMapKeyRef:
            name: special-config
            key: special.how
      - name: SPECIAL_TYPE_KEY
        valueFrom:
          configMapKeyRef:
            name: special-config
            key: special.type
    envFrom:
     - configMapRef:
         name: special-config
  restartPolicy: Never

# 查看日志
kubectl logs dapi-test-pod 
very charm

在数据卷里面使用 ConfigMap

最基本的就是将文件填入数据卷，在这个文件中，键就是文件名，键值就是文件内容。

kubectl delete -f dapi-test-pod2.yaml 

vi dapi-test-pod3.yaml 
apiVersion: v1
kind: Pod
metadata:
  name: dapi-test-pod
spec:
  containers:
  - name: test-container
    image: wangyanglinux/myapp:v1
    command: [ "/bin/sh", "-c", "sleep 600s" ]
    volumeMounts:
    - name: config-volume
      mountPath: /etc/config
  volumes:
    - name: config-volume
      configMap:
        name: special-config
  restartPolicy: Never

kubectl apply -f dapi-test-pod3.yaml 

kubectl exec -it dapi-test-pod -- /bin/sh
/ # cd /etc/config/
/etc/config # ls
special.how   special.type

ConfigMap 热更新

kubectl delete -f dapi-test-pod3.yaml 

vi dapi-test-pod4.yaml 
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: my-nginx
spec:
  replicas: 1
  template:
    metadata:
      labels:
        run: my-nginx
    spec:
      containers:
      - name: my-nginx
        image: wangyanglinux/myapp:v1
        ports:
        - containerPort: 80
        volumeMounts:
          - name: env-volume
            mountPath: /etc/config
      volumes:
        - name: env-volume
          configMap:
            name: env-config


kubectl apply -f dapi-test-pod4.yaml 

kubectl get pod
NAME                        READY   STATUS    RESTARTS   AGE
my-nginx-68c98ffd69-4c2c9   1/1     Running   0          7m33s

kubectl edit configmap env-config
# 把 INFO 改成 DEBUG

#（这里的实验我并没有成功修改，暂时没找到原因）
kubectl exec  my-nginx-68c98ffd69-4c2c9 -it -- cat /etc/config/log_level

configmap 挂载到 pod 中

configmap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: echat-business-cm
data:
  env.js: |
    ;(function (win) {
      win._env = {
        env: 'test',
        h5MallHost: 'http://testm.yanpin.cn/',
      }
    })(window)

deployment 中部分定义

  volumes:
  - name: env-volume
    configMap:
      name: echat-business-cm
      items:
      - key: env.js
        path: env.js
  volumeMounts:
  - mountPath: /usr/share/nginx/html/js/env.js
    name: env-volume
    subPath: env.js

效果如下：

posted @ 2020-03-24 14:04 klvchen 阅读(403) 评论(0) 收藏举报

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klvchen

K8S conffigMap

使用目录创建 ConfigMap

使用文件创建 ConfigMap

使用字面值创建 ConfigMap

使用 ConfigMap 来代替环境变量

使用 ConfigMap 设置命令行参数

在数据卷里面使用 ConfigMap

ConfigMap 热更新

configmap 挂载到 pod 中

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