一、基于字符值创建

1.创建ConfigMap

[root@k8s-master01 conf]# kubectl create cm envfromliteral --from-literal=level=INFO --from-literal=PASSWORD=redis123

2.验证

[root@k8s-master01 conf]# kubectl get cm envfromliteral -oyaml
apiVersion: v1
data:
  PASSWORD: redis123
  level: INFO
kind: ConfigMap
metadata:
  creationTimestamp: "2022-12-03T08:43:38Z"
  name: envfromliteral
  namespace: default
  resourceVersion: "36640"
  uid: 7bd86383-d671-49be-b174-18be41ee5a7e

[root@k8s-master01 ~]# kubectl describe  cm envfromliteral 
Name:         envfromliteral
Namespace:    default
Labels:       <none>
Annotations:  <none>

Data
====
level:
----
INFO
PASSWORD:
----
redis123

BinaryData
====

Events:  <none>

3.5 基于yaml文件

1.编写yaml文件

[root@k8s-master01 ~]# mkdir -p configmap/conf
[root@k8s-master01 ~]# vim configmap/conf/cm.yaml
apiVersion: v1
kind: ConfigMap
metadata:
  name: envfromliteral2
  namespace: default
data:
  PASSWORD: redis123
  level: INFO

2.创建cm

[root@k8s-master01 ~]# kubectl create -f configmap/conf/cm.yaml

3.进行验证

[root@k8s-master01 ~]# kubectl get cm 
NAME               DATA   AGE
cmfromdir          2      16m
cmfromfile         1      12m
envfromliteral     2      5m46s
envfromliteral2    2      27s
gameenvcm          2      7m25s
kube-root-ca.crt   1      51d

[root@k8s-master01 ~]# kubectl get cm envfromliteral2 -oyaml 
apiVersion: v1
data:
  PASSWORD: redis123
  level: INFO
kind: ConfigMap
metadata:
  creationTimestamp: "2023-05-02T09:29:17Z"
  name: envfromliteral2
  namespace: default
  resourceVersion: "724100"
  uid: fd63ca4d-e950-4ac1-a462-e133d03dd8d8

[root@k8s-master01 ~]# kubectl describe  cm envfromliteral2 
Name:         envfromliteral2
Namespace:    default
Labels:       <none>
Annotations:  <none>

Data
====
PASSWORD:
----
redis123
level:
----
INFO

BinaryData
====

Events:  <none>

3.6 自定义conf文件

3.6.1 自定义单个conf文件

1.创建工作目录

[root@k8s-master01 ~]# mkdir -p configmap/conf

2.编写配置文件

[root@k8s-master01 ~]# vim configmap/conf/game.conf
lives=3
secret.code=true

3.创建ConfigMap，指定key名为game-conf

[root@k8s-master01 ~]# cd configmap/conf/
[root@k8s-master01 conf]# kubectl create cm cmspecialname --from-file=game-conf=game.conf
configmap/cmspecialname created

4.验证

[root@k8s-master01 conf]# kubectl get cm 
NAME               DATA   AGE
cmfromdir          2      15m
cmfromfile         1      10m
cmspecialname      1      41s
kube-root-ca.crt   1      26h

[root@k8s-master01 conf]# kubectl get cm cmspecialname -oyaml
apiVersion: v1
data:
  game-conf: |
    lives=3
    secret.code=true
kind: ConfigMap
metadata:
  creationTimestamp: "2022-12-03T08:29:15Z"
  name: cmspecialname
  namespace: default
  resourceVersion: "34779"
  uid: 8a5ec907-81bf-4467-a38e-4bf36c2b731f

3.6.2 自定义多个conf文件

1.创建工作目录

[root@k8s-master01 ~]# mkdir -p configmap/conf

2.编写配置文件

[root@k8s-master01 ~]# vim configmap/conf/game.conf
lives=3
secret.code=true

[root@k8s-master01 ~]# vim configmap/conf/redis.conf
password 123

3.创建ConfigMap，指定多个key名，有game-conf和redis-conf

[root@k8s-master01 ~]# cd configmap/conf/
[root@k8s-master01 conf]# kubectl create cm cmspecialname2 --from-file=game-conf=game.conf --from-file=redis-conf=redis.conf

4.验证

[root@k8s-master01 conf]# kubectl get cm cmspecialname2 -oyaml
apiVersion: v1
data:
  game-conf: |
    lives=3
    secret.code=true
  redis-conf: |
    password 123
kind: ConfigMap
metadata:
  creationTimestamp: "2022-12-03T08:31:50Z"
  name: cmspecialname2
  namespace: default
  resourceVersion: "35112"
  uid: 48514c82-e671-4816-8abf-33f9fe84cbe6