configMap
configmap概述:数据会存储在etcd数据库,其应用场景主要在应用程序的配置
configmap支持的类型(1)键值对(2)多行数据
pod使用configmap资源有两种常见的方式(1)变量注入(2)数据卷挂载
推荐阅读
https://kubernetes.io/docs/concepts/storage/volumes/
https://kubernetes.io/docs/concepts/configuration/configmap/声明式创建cm资源
[root@master231 configmaps]
apiVersion: v1
kind: ConfigMap
metadata:name: game-demo
data:player_initial_lives: "3"ui_properties_file_name: "user-interface.properties"school: oldboyeduclass: linux94game.properties: | enemy.types=aliens,monstersplayer.maximum-lives=5 user-interface.properties: |color.good=purplecolor.bad=yellowallow.textmode=true my.cnf: |[mysqld]datadir=/var/lib/mysqlbasedir=/usr/local/mysqlsocket=/tpm/mysql.sockskip-name-resolve=1port=3306[client]username=adminpassword=oldboyedu 创建
root@ubuntu0:~/manifests/configmap
configmap/game-demo created查看
root@ubuntu0:~/manifests/configmap
NAME DATA AGE
game-demo 7 29s
kube-root-ca.crt 1 23d
root@ubuntu0:~/manifests/configmap
NAME DATA AGE
game-demo 7 33s 删除
root@ubuntu0:~/manifests/configmap
configmap "game-demo" deleted响应式创建
root@ubuntu0:~/manifests/configmap
configmap/xp created
root@ubuntu0:~/manifests/configmap
NAME DATA AGE
kube-root-ca.crt 1 23d
xp 2 6s
root@ubuntu0:~/manifests/configmap
NAME DATA AGE
xp 2 8sroot@ubuntu0:~/manifests/configmap
Name: xp
Namespace: default
Labels: <none>
Annotations: <none>Data
====
class:
----
linux94
school:
----
oldboyeduBinaryData
====Events: <none>基于配置文件创建cm[root@master231 configmaps]
-rw-r--r-- 1 root root 4406 Nov 15 17:40 /root/kube-flannel.yml
[root@master231 configmaps]
[root@master231 configmaps]
configmap/oldboyedu-cni created3.3 查看cm资源
[root@master231 configmaps]
NAME DATA AGE
oldboyedu-cni 1 8s
[root@master231 configmaps]
[root@master231 configmaps]
[root@master231 configmaps]
[root@master231 configmaps]
[root@master231 configmaps]
[root@master231 configmaps]3.3 删除cm资源
[root@master231 configmaps]
NAME DATA AGE
kube-root-ca.crt 1 4d16h
oldboyedu-cni 1 2m27s
oldboyedu-linux94 2 4m38s
[root@master231 configmaps]
[root@master231 configmaps]
configmap "oldboyedu-cni" deleted
[root@master231 configmaps]
[root@master231 configmaps]
NAME DATA AGE
kube-root-ca.crt 1 4d16h
oldboyedu-linux94 2 5m9s
[root@master231 configmaps]root@ubuntu0:~/manifests/configmap
apiVersion: v1
data:class: linux94school: oldboyedu
kind: ConfigMap
metadata:creationTimestamp: "2025-05-02T10:49:39Z"name: xpnamespace: defaultresourceVersion: "670826"uid: b129e625-7733-4b80-9d9f-55227b473f51那如何在声明式中引用这个key:vlaue呢
root@ubuntu0:~/manifests/configmap
apiVersion: v1
kind: ReplicationController
metadata:name: xp-configmap
spec:replicas: 1selector:apps: v1template:metadata:labels:apps: v1spec:nodeName: ubuntu1containers:- name: xiuxian-v1image: registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1env:- name: SCHOOLvalueFrom:configMapKeyRef:name: "xp"key: "school"- name: CLassvalueFrom:configMapKeyRef:name: "xp"key: "class"
root@ubuntu0:~/manifests/configmap
replicationcontroller/xp-configmap created
root@ubuntu0:~/manifests/configmap
SCHOOL=oldboyedu
CLass=linux94
Pod基于存储卷引用cm资源
root@ubuntu0:~/manifests/configmap
apiVersion: v1
kind: ReplicationController
metadata:name: xpxp
spec:replicas: 1selector: apps: xpxp-v1template:metadata:labels:apps: xpxp-v1spec:nodeName: ubuntu1volumes:- name: dataconfigMap:name: "xp"items:- key: school path: school.txtcontainers:- name: nginximage: registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1volumeMounts:- name: datamountPath: /oldboyeduroot@ubuntu0:~/manifests/configmap
replicationcontroller/xpxp created
root@ubuntu0:~/manifests/configmap
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
xpxp-25pwf 1/1 Running 0 25m 10.100.2.19 ubuntu1 <none> <none>
root@ubuntu0:~/manifests/configmap
school.txt
root@ubuntu0:~/manifests/configmap
oldboyeduroot@ubuntu0:~/manifests/configmap将"registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1"镜像的80端口修改为81端口,要求在不重新打镜像的情况下,使用cm存储卷的方式挂载。1.找到nginx的配置文件
root@ubuntu0:~/manifests/configmap
/
/
/etc/nginx/conf.d/default.conf
/
server { listen 80; listen [::]:80; server_name localhost; location / { root /usr/share/nginx/html;index index.html index.htm; } error_page 500 502 503 504 /50x.html;location = /50x.html { root /usr/share/nginx/html; } }
2.编写资源清单root@ubuntu0:~/manifests/configmap
apiVersion: v1
kind: ConfigMap
metadata:name: game-cm
data:port.conf: |server { listen 81; listen [::]:81; server_name localhost; location / { root /usr/share/nginx/html;index index.html index.htm; } error_page 500 502 503 504 /50x.html;location = /50x.html { root /usr/share/nginx/html; } }
---
apiVersion: v1
kind: ReplicationController
metadata:name: xiuxian-cm
spec:replicas: 1selector: apps: xpxp-v1template:metadata:labels:apps: xpxp-v1spec:nodeName: ubuntu1volumes:- name: dataconfigMap:name: "game-cm"items:- key: port.confpath: default.confcontainers:- name: nginximage: registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1volumeMounts:- name: datamountPath: /etc/nginx/conf.d/
---
apiVersion: v1
kind: Service
metadata:name: svc-mysql
spec:type: NodePortselector:apps: xpxp-v1ports:- port: 80targetPort: 81nodePort: 30081
root@ubuntu0:~/manifests/configmap
configmap/game-cm created
replicationcontroller/xiuxian-cm created
service/svc-mysql created
root@ubuntu0:~/manifests/configmap
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
xiuxian-cm-b52m2 1/1 Running 0 7s 10.100.2.21 ubuntu1 <none> <none>
root@ubuntu0:~/manifests/configmap
kubernetes svc-mysql
root@ubuntu0:~/manifests/configmap
Name: svc-mysql
Namespace: default
Labels: <none>
Annotations: <none>
Selector: apps=xpxp-v1
Type: NodePort
IP Family Policy: SingleStack
IP Families: IPv4
IP: 192.168.116.228
IPs: 192.168.116.228
Port: <unset> 80/TCP
TargetPort: 81/TCP
NodePort: <unset> 30081/TCP
Endpoints: 10.100.2.21:81
Session Affinity: None
External Traffic Policy: Cluster
Events: <none>
root@ubuntu0:~/manifests/configmap
<!DOCTYPE html>
<html><head><meta charset="utf-8"/><title>yinzhengjie apps v1</title><style>div img {width: 900px;height: 600px;margin: 0;}</style></head><body><h1 style="color: green">凡人修仙传 v1 </h1><div><img src="1.jpg"><div></body></html>在进入容器内,已经发生改变了
root@ubuntu0:~/manifests/configmap
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
xiuxian-cm-b52m2 1/1 Running 0 2m38s 10.100.2.21 ubuntu1 <none> <none>
root@ubuntu0:~/manifests/configmap
/
server { listen 81; listen [::]:81; server_name localhost; location / { root /usr/share/nginx/html;index index.html index.htm; } error_page 500 502 503 504 /50x.html;location = /50x.html { root /usr/share/nginx/html; } }
kubectl logs查看Pod日志
1.实时查看日志
[root@master231 ~]
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
oldboyedu-xiuxian-cm-844zl 1/1 Running 0 4m47s 10.100.1.55 worker232 <none> <none>
[root@master231 ~]
[root@master231 ~]
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: can not modify /etc/nginx/conf.d/default.conf (read-only file system?)
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
2024/11/20 03:10:00 [notice] 1
2024/11/20 03:10:00 [notice] 1
2024/11/20 03:10:00 [notice] 1
2024/11/20 03:10:00 [notice] 1
2024/11/20 03:10:00 [notice] 1
2024/11/20 03:10:00 [notice] 1
2024/11/20 03:10:00 [notice] 1
2024/11/20 03:10:00 [notice] 1
10.100.0.0 - - [20/Nov/2024:03:10:08 +0000] "GET / HTTP/1.1" 200 357 "-" "curl/7.81.0" "-"
10.100.0.0 - - [20/Nov/2024:03:10:13 +0000] "GET / HTTP/1.1" 200 357 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36" "-"
10.100.0.0 - - [20/Nov/2024:03:10:13 +0000] "GET /1.jpg HTTP/1.1" 200 233472 "http://10.0.0.231:30080/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36" "-"
2024/11/20 03:10:13 [error] 24
10.100.0.0 - - [20/Nov/2024:03:10:13 +0000] "GET /favicon.ico HTTP/1.1" 404 555 "http://10.0.0.231:30080/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36" "-"2.查看最近5min的日志
[root@master231 ~]
2024/11/20 03:16:22 [error] 24
10.100.0.0 - - [20/Nov/2024:03:16:22 +0000] "GET /oldboyedu.html HTTP/1.1" 404 153 "-" "curl/7.81.0" "-"3.查看指定容器的日志(一般情况下是一个Pod有多个容器时才会使用)
[root@master231 ~]
2024/11/20 03:16:22 [error] 24
10.100.0.0 - - [20/Nov/2024:03:16:22 +0000] "GET /oldboyedu.html HTTP/1.1" 404 153 "-" "curl/7.81.0" "-"
cm资源存储nginx主配置文件值subPath案例
root@ubuntu0:~/manifests/configmap
apiVersion: v1
kind: ConfigMap
metadata:name: game-cm
data:main.conf: |user nginx;worker_processes auto;error_log /var/log/nginx/error.log notice;pid /var/run/nginx.pid;events {worker_connections 1024;}http {include /etc/nginx/mime.types;default_type application/octet-stream;log_format oldboyedu_nginx_json '{"@timestamp":"$time_iso8601",''"host":"$server_addr",''"clientip":"$remote_addr",''"SendBytes":$body_bytes_sent,''"responsetime":$request_time,''"upstreamtime":"$upstream_response_time",''"upstreamhost":"$upstream_addr",''"http_host":"$host",''"uri":"$uri",''"domain":"$host",''"xff":"$http_x_forwarded_for",''"referer":"$http_referer",''"tcp_xff":"$proxy_protocol_addr",''"http_user_agent":"$http_user_agent",''"status":"$status"}';access_log /var/log/nginx/access.log oldboyedu_nginx_json;sendfile on;keepalive_timeout 65;include /etc/nginx/conf.d/*.conf;}port.conf: |server { listen 81; listen [::]:81; server_name localhost; location / { root /usr/share/nginx/html;index index.html index.htm; } error_page 500 502 503 504 /50x.html;location = /50x.html { root /usr/share/nginx/html; } }
---
apiVersion: v1
kind: ReplicationController
metadata:name: xiuxian-cm
spec:replicas: 1selector: apps: xpxp-v1template:metadata:labels:apps: xpxp-v1spec:nodeName: ubuntu1volumes:- name: dataconfigMap:name: "game-cm"items:- key: port.confpath: default.conf- name: data1configMap:name: "game-cm"items:- key: main.confpath: nginx.conf containers:- name: nginximage: registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1volumeMounts:- name: datamountPath: /etc/nginx/conf.d/- name: data1mountPath: /etc/nginx/nginx.confsubPath: nginx.conf
---
apiVersion: v1
kind: Service
metadata:name: svc-mysql
spec:type: NodePortselector:apps: xpxp-v1ports:- port: 80targetPort: 81nodePort: 30081root@ubuntu0:~/manifests/configmap
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
xiuxian-cm-8q45n 1/1 Running 0 7s 10.100.2.22 ubuntu1 <none> <none>
root@ubuntu0:~/manifests/configmap
<!DOCTYPE html>
<html><head><meta charset="utf-8"/><title>yinzhengjie apps v1</title><style>div img {width: 900px;height: 600px;margin: 0;}</style></head><body><h1 style="color: green">凡人修仙传 v1 </h1><div><img src="1.jpg"><div></body></html>
k8s部署mysql主从
root@ubuntu0:~/manifests/ReplicationController
apiVersion: v1
kind: ConfigMap
metadata:name: game-demo
data:master.cnf: |[mysqld]log-bin=mysqllog-binserver_id=111skip-host-cacheskip-name-resolvedatadir=/var/lib/mysqlsocket=/var/run/mysqld/mysqld.socksecure-file-priv=/var/lib/mysql-filesuser=mysqlpid-file=/var/run/mysqld/mysqld.pid[client]socket=/var/run/mysqld/mysqld.sock !includedir /etc/mysql/conf.d/slave.cnf: |[mysqld]log-bin=mysqllog-binserver_id=222skip-host-cacheskip-name-resolvedatadir=/var/lib/mysqlsocket=/var/run/mysqld/mysqld.socksecure-file-priv=/var/lib/mysql-filesuser=mysqlpid-file=/var/run/mysqld/mysqld.pid[client]socket=/var/run/mysqld/mysqld.sock !includedir /etc/mysql/conf.d/
---
apiVersion: v1
kind: ReplicationController
metadata:name: mysql-master
spec:replicas: 1selector:apps: v1 template:spec:nodeName: ubuntu1volumes:- name: datanfs:server: ubuntu0path: /oldboyedu/data/nfs-server/master-lib - name: data1configMap:name: "game-demo"items:- key: master.cnfpath: my.cnf containers:- name: mysql-v1image: mysql:5.7.29ports:- containerPort: 3306name: mysqlportenv:- name: MYSQL_ALLOW_EMPTY_PASSWORDvalue: "yes"- name: MYSQL_USERvalue: linux94- name: MYSQL_PASSWORDvalue: 'oldboyedu'volumeMounts:- name: datamountPath: /var/lib/mysql- name: data1mountPath: /etc/my.cnfsubPath: my.cnfargs:- --character-set-server=utf8- --collation-server=utf8_bin- --default-authentication-plugin=mysql_native_passwordmetadata:labels:apps: v1
---
apiVersion: v1
kind: Service
metadata:name: svc-mysql
spec:selector:apps: v1ports:- port: 3306 name: mysqlport
---apiVersion: v1
kind: ReplicationController
metadata:name: mysql-slave
spec:replicas: 1selector:apps: v2template:spec:nodeName: ubuntu1volumes:- name: datanfs:server: ubuntu0path: /oldboyedu/data/nfs-server/slave-lib - name: data1configMap:name: "game-demo"items:- key: slave.cnfpath: my.cnf containers:- name: mysql-v2image: mysql:5.7.29env:- name: MYSQL_ALLOW_EMPTY_PASSWORDvalue: "yes"- name: MYSQL_MASTER_HOSTvalue: 'svc-mysql'ports:- containerPort: 3306volumeMounts:- name: datamountPath: /var/lib/mysql- name: data1mountPath: /etc/my.cnfsubPath: my.cnfmetadata:labels:apps: v2
---
apiVersion: v1
kind: Service
metadata:name: svc-slave
spec:selector:apps: v2ports:- port: 3306进入主数据库查看
root@ubuntu0:~/manifests/ReplicationController
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.29-log MySQL Community Server (GPL)Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.授权用户访问
mysql> GRANT Replication slave ON *.* TO linux94;
Query OK, 0 rows affected (0.00 sec)mysql> SHOW MASTER STATUS\G
*************************** 1. row ***************************File: mysqllog-bin.000004Position: 353Binlog_Do_DB: Binlog_Ignore_DB:
Executed_Gtid_Set:
1 row in set (0.00 sec)mysql> SHOW GRANTS FOR linux94;
+-------------------------------------------------+
| Grants for linux94@% |
+-------------------------------------------------+
| GRANT REPLICATION SLAVE ON *.* TO 'linux94'@'%' |
+-------------------------------------------------+从库配置
mysql> CHANGE MASTER TO MASTER_HOST='svc-mysql',MASTER_USER='linux94',MASTER_PASSWORD='oldboyedu',MASTER_PORT=3306,MASTER_LOG_FILE='mysqllog-bin.000004',MASTER_LOG_POS=353,MASTER_CONNECT_RETRY=3;
Query OK, 0 rows affected, 2 warnings (0.04 sec)mysql> STOP SLAVE;
Query OK, 0 rows affected, 1 warning (0.00 sec)mysql> START SLAVE;
Query OK, 0 rows affected (0.00 sec)mysql> SHOW SLAVE STATUS\G
*************************** 1. row ***************************Slave_IO_State: Waiting for master to send eventMaster_Host: svc-mysqlMaster_User: linux94Master_Port: 3306Connect_Retry: 3Master_Log_File: mysqllog-bin.000004Read_Master_Log_Pos: 353Relay_Log_File: mysql-slave-2pgsd-relay-bin.000002Relay_Log_Pos: 323Relay_Master_Log_File: mysqllog-bin.000004Slave_IO_Running: YesSlave_SQL_Running: Yes
secret概述
与ConfigMap类似,区别在于secret存储敏感数据,所有的数据都需要经过base64进行编码。
使用secret主要存储的是凭据信息。参考链接:https://kubernetes.io/zh/docs/concepts/configuration/secret/secret资源声明式两种创建方式2.1 方式一: 基于stringData方式(推荐)
root@ubuntu0:~/manifests/secret
apiVersion: v1
kind: Secret
metadata:name: user-info
stringData:username: adminpassword: "1"my.cnf: |[mysqld]basedir=/oldboyedu/softwares/mysql80port=3306datadir=/oldboyedu/data/mysql80socket=/tmp/mysql80.sock
root@ubuntu0:~/manifests/secret
secret/user-info created
root@ubuntu0:~/manifests/secretNAME TYPE DATA AGE
default-token-hszqs kubernetes.io/service-account-token 3 26d
user-info Opaque 3 7s
root@ubuntu0:~/manifests/secret
NAME TYPE DATA AGE
user-info Opaque 3 46s
root@ubuntu0:~/manifests/secret
Name: user-info
Namespace: default
Labels: <none>
Annotations: <none>Type: OpaqueData
====
my.cnf: 113 bytes
password: 1 bytes
username: 5 bytes
root@ubuntu0:~/manifests/secret
apiVersion: v1
data:my.cnf: W215c3FsZF0KYmFzZWRpcj0vb2xkYm95ZWR1L3NvZnR3YXJlcy9teXNxbDgwCnBvcnQ9MzMwNgpkYXRhZGlyPS9vbGRib3llZHUvZGF0YS9teXNxbDgwCnNvY2tldD0vdG1wL215c3FsODAuc29jawo=password: MQ==username: YWRtaW4=
kind: Secret
metadata:annotations:kubectl.kubernetes.io/last-applied-configuration: |{"apiVersion":"v1","kind":"Secret","metadata":{"annotations":{},"name":"user-info","namespace":"default"},"stringData":{"my.cnf":"[mysqld]\nbasedir=/oldboyedu/softwares/mysql80\nport=3306\ndatadir=/oldboyedu/data/mysql80\nsocket=/tmp/mysql80.sock\n","password":"1","username":"admin"}}creationTimestamp: "2025-05-05T02:16:24Z"name: user-infonamespace: defaultresourceVersion: "815355"uid: 90653274-1030-4208-a555-032c6484029f
type: Opaque解密:
root@ubuntu0:~/manifests/secret
DAuc29jawo='|base64 -d
[mysqld]
basedir=/oldboyedu/softwares/mysql80
port=3306
datadir=/oldboyedu/data/mysql80
socket=/tmp/mysql80.sock
root@ubuntu0:~/manifests/secret# echo 'MQ=='|base64 -d
1root@ubuntu0:~/manifests/secret# echo 'MQ=='|base64 -d|more
1方式二: 基于方式(不推荐,编写时容易出错)
root@ubuntu0:~/manifests/secret
bGludXg5NAo=
root@ubuntu0:~/manifests/secret
b2xkYm95ZWR1Cg==
root@ubuntu0:~/manifests/secret
apiVersion: v1
kind: Secret
metadata:name: admin
data:username: bGludXg5NAo=password: b2xkYm95ZWR1Cg==
root@ubuntu0:~/manifests/secret
bGludXg5NAo=
root@ubuntu0:~/manifests/secret
b2xkYm95ZWR1Cg==
root@ubuntu0:~/manifests/secret
apiVersion: v1
kind: Secret
metadata:name: admin
data:username: bGludXg5NAo=password: b2xkYm95ZWR1Cg==
root@ubuntu0:~/manifests/secret
secret/admin created
root@ubuntu0:~/manifests/secret
NAME TYPE DATA AGE
admin Opaque 2 6s
root@ubuntu0:~/manifests/secret
apiVersion: v1
data:password: b2xkYm95ZWR1Cg==username: bGludXg5NAo=
kind: Secret
metadata:annotations:kubectl.kubernetes.io/last-applied-configuration: |{"apiVersion":"v1","data":{"password":"b2xkYm95ZWR1Cg==","username":"bGludXg5NAo="},"kind":"Secret","metadata":{"annotations":{},"name":"admin","namespace":"default"}}creationTimestamp: "2025-05-05T02:21:09Z"name: adminnamespace: defaultresourceVersion: "815756"uid: 4e62f0f6-1940-43f7-b81c-16278cda898d
type: Opaque
响应式创建secrets常用选项
root@ubuntu0:~/manifests/secret
secret/test01 created
root@ubuntu0:~/manifests/secret
secret/test02 created
root@ubuntu0:~/manifests/secret
NAME TYPE DATA AGE
test01 Opaque 2 20s
test02 Opaque 2 9s
root@ubuntu0:~/manifests/secret
apiVersion: v1
items:
- apiVersion: v1data:SCHOOL: b2xkYm95ZWR1class: bGludXg5NA==kind: Secretmetadata:creationTimestamp: "2025-05-05T02:39:39Z"name: test01namespace: defaultresourceVersion: "817317"uid: 9255edec-24db-4490-a8b3-d0951b21c470type: Opaque
- apiVersion: v1data:Data: YXBpVmVyc2lvbjogdjEKa2luZDogU2VjcmV0Cm1ldGFkYXRhOgogIG5hbWU6IGFkbWluCmRhdGE6CiAgIyBLRVnml6DpnIDlgZrku7vkvZXmk43kvZzvvIxWQUxVRei/m+ihjEJBU0U2NOaJi+WKqOe8lueggQogIHVzZXJuYW1lOiBiR2x1ZFhnNU5Bbz0KICBwYXNzd29yZDogYjJ4a1ltOTVaV1IxQ2c9PQo=stringData: YXBpVmVyc2lvbjogdjEKa2luZDogU2VjcmV0Cm1ldGFkYXRhOgogIG5hbWU6IHVzZXItaW5mbwpzdHJpbmdEYXRhOgogIHVzZXJuYW1lOiBhZG1pbgogIHBhc3N3b3JkOiAiMSIKCiAgbXkuY25mOiB8CiAgICBbbXlzcWxkXQogICAgYmFzZWRpcj0vb2xkYm95ZWR1L3NvZnR3YXJlcy9teXNxbDgwCiAgICBwb3J0PTMzMDYKICAgIGRhdGFkaXI9L29sZGJveWVkdS9kYXRhL215c3FsODAKICAgIHNvY2tldD0vdG1wL215c3FsODAuc29jawo=kind: Secretmetadata:creationTimestamp: "2025-05-05T02:39:50Z"name: test02namespace: defaultresourceVersion: "817332"uid: b1476fdd-5182-426d-a784-7ee5b16342c1type: Opaque
kind: List
metadata:resourceVersion: ""selfLink: ""
root@ubuntu0:~/manifests/secret
secret "test01" deleted
secret "test02" deleted
Pod引用secrets的两种方式
基于环境变量引入1.先查看一下user-info的变量
root@ubuntu0:~/manifests/secret
NAME TYPE DATA AGE
user-info Opaque 3 4d21h
root@ubuntu0:~/manifests/secret
apiVersion: v1
data:my.cnf: W215c3FsZF0KYmFzZWRpcj0vb2xkYm95ZWR1L3NvZnR3YXJlcy9teXNxbDgwCnBvcnQ9MzMwNgpkYXRhZGlyPS9vbGRib3llZHUvZGF0YS9teXNxbDgwCnNvY2tldD0vdG1wL215c3FsODAuc29jawo=password: MQ==username: YWRtaW4=
kind: Secret2.基于环境变量引入root@ubuntu0:~/manifests/secret
apiVersion: v1
kind: ReplicationController
metadata:name: secret-env
spec:replicas: 1selector:apps: v1template:metadata:labels:apps: v1spec:nodeName: ubuntu1containers:- name: xpimage: registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1env:- name: env_usernamevalueFrom:secretKeyRef:name: user-infokey: username- name: env_mycnfvalueFrom:secretKeyRef:name: user-infokey: my.cnf
root@ubuntu0:~/manifests/secret
replicationcontroller/secret-env created
root@ubuntu0:~/manifests/secret
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
mysql-master-4zxp6 1/1 Running 0 5d 10.100.2.30 ubuntu1 <none> <none>
mysql-slave-2pgsd 1/1 Running 0 5d 10.100.2.29 ubuntu1 <none> <none>
secret-env-78xjs 1/1 Running 0 29s 10.100.2.32 ubuntu1 <none> <none>
查看环境变量,他会自动的解密
root@ubuntu0:~/manifests/secret
env_username=admin
env_mycnf=[mysqld]
basedir=/oldboyedu/softwares/mysql80
port=3306
datadir=/oldboyedu/data/mysql80
socket=/tmp/mysql80.sock基于存储卷的方式引用
root@ubuntu0:~/manifests/secret
apiVersion: v1
kind: ReplicationController
metadata:name: oldboyedu-rc-nfs-v1
spec:replicas: 1selector:apps: v1template:metadata:labels:apps: v1spec:nodeName: ubuntu1volumes:- name: datasecret: secretName: user-infoitems:- key: usernamepath: username.txt- key: passwordpath: password.txt- key: my.cnfpath: my.cnfcontainers:- name: nginximage: registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1 volumeMounts:- name: datamountPath: /oldboyeduroot@ubuntu0:~/manifests/secret
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
mysql-master-4zxp6 1/1 Running 0 5d 10.100.2.30 ubuntu1 <none> <none>
mysql-slave-2pgsd 1/1 Running 0 5d 10.100.2.29 ubuntu1 <none> <none>
oldboyedu-rc-nfs-v1-5cx5d 1/1 Running 0 8s 10.100.2.33 ubuntu1 <none> <none>
root@ubuntu0:~/manifests/secret
/
total 0
lrwxrwxrwx 1 root root 13 May 10 00:42 my.cnf -> ..data/my.cnf
lrwxrwxrwx 1 root root 19 May 10 00:42 password.txt -> ..data/password.txt
lrwxrwxrwx 1 root root 19 May 10 00:42 username.txt -> ..data/username.txt
/
[mysqld]
basedir=/oldboyedu/softwares/mysql80
port=3306
datadir=/oldboyedu/data/mysql80
socket=/tmp/mysql80.sock
基于响应式secret实现harbor登录认证案例
1.响应式创建harbor的认证信息
[root@master231 case-demo]
secret/oldboyedu-harbor created
[root@master231 case-demo]
NAME TYPE DATA AGE
oldboyedu-harbor kubernetes.io/dockerconfigjson 1 9s2.创建测试
[root@master231 case-demo]
apiVersion: v1
kind: ReplicationController
metadata:name: oldboyedu-private-harbor
spec:replicas: 3selector:apps: linuxtemplate:spec:imagePullSecrets:- name: oldboyedu-harborcontainers:- name: c1image: harbor.oldboyedu.com/oldboyedu-linux/alpine:latestimagePullPolicy: Alwaysstdin: truemetadata:labels:apps: linux
[root@master231 case-demo]
[root@master231 case-demo]
replicationcontroller/oldboyedu-private-harbor created
[root@master231 case-demo]
[root@master231 case-demo]
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
oldboyedu-private-harbor-f7hmj 1/1 Running 0 4s 10.100.1.64 worker232 <none> <none>
oldboyedu-private-harbor-gkmtm 1/1 Running 0 4s 10.100.2.120 worker233 <none> <none>
oldboyedu-private-harbor-pmf5q 1/1 Running 0 4s 10.100.2.119 worker233 <none> <none>
[root@master231 case-demo]
基于声明式secret实现harbor登录认证案例
1.harbor创建用户名和密码 用户名称: linux94 密码: Linux@2024邮箱: linux94@oldboyedu.com 2.对认证信息进行base64编码[root@master231 case-demo]bGludXg5NDpMaW51eEAyMDI0[root@master231 case-demo]
3.得到最终的认证信息:{"auths":{"harbor.oldboyedu.com":{"username":"linux94","password":"Linux@2024","email":"linux94@oldboyedu.com","auth":"bGludXg5NDpMaW51eEAyMDI0"}}} 4.编写资源清单
[root@master231 case-demo]
apiVersion: v1
kind: Secret
metadata:name: linux94-harbor
stringData:.dockerconfigjson: '{"auths":{"harbor.oldboyedu.com":{"username":"linux94","password":"Linux@2024","email":"linux94@oldboyedu.com","auth":"bGludXg5NDpMaW51eEAyMDI0"}}}'
type: kubernetes.io/dockerconfigjson---apiVersion: v1
kind: ReplicationController
metadata:name: oldboyedu-private-harbor
spec:replicas: 3selector:apps: linuxtemplate:spec:imagePullSecrets:- name: linux94-harborcontainers:- name: c1image: harbor.oldboyedu.com/oldboyedu-linux/alpine:latestimagePullPolicy: Alwaysstdin: truemetadata:labels:apps: linux
[root@master231 case-demo]
[root@master231 case-demo]
secret/linux94-harbor created
replicationcontroller/oldboyedu-private-harbor created
[root@master231 case-demo]
[root@master231 case-demo]
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
oldboyedu-private-harbor-6kf6t 1/1 Running 0 3s 10.100.2.124 worker233 <none> <none>
oldboyedu-private-harbor-prqnv 1/1 Running 0 3s 10.100.2.125 worker233 <none> <none>
oldboyedu-private-harbor-tcp27 1/1 Running 0 3s 10.100.1.68 worker232 <none> <none>
[root@master231 case-demo]
基于serviceaccounts绑定secret实现harbor认证
root@ubuntu0:/oldboyedu/softwares/harbor
serviceaccounts sa v1 true ServiceAccount1.响应式创建账号
root@ubuntu0:/oldboyedu/softwares/harbor
serviceaccount/xixi created
root@ubuntu0:/oldboyedu/softwares/harbor
NAME SECRETS AGE
xixi 1 61s
root@ubuntu0:/oldboyedu/softwares/harbor
apiVersion: v1
kind: ServiceAccount
metadata:creationTimestamp: "2025-05-18T12:03:44Z"name: xixinamespace: defaultresourceVersion: "1617334"uid: 8597121b-be87-4e33-a25b-d7f84a2fc43d
secrets:
- name: xixi-token-f4d9p2.查看账号后端的Image pull secrets
root@ubuntu0:/oldboyedu/softwares/harbor
Name: xixi
Namespace: default
Labels: <none>
Annotations: <none>
Image pull secrets: <none>
Mountable secrets: xixi-token-f4d9p
Tokens: xixi-token-f4d9p
Events: <none>
由于上面的镜像拉去策略为空,所以更新账号绑定的信息
[root@master231 serviceaccounts]
serviceaccount/xixi patched
[root@master231 serviceaccounts]
[root@master231 serviceaccounts]
Name: xixi
Namespace: default
Labels: <none>
Annotations: <none>
Image pull secrets: oldboyedu-harbor
Mountable secrets: xixi-token-nk9z4
Tokens: xixi-token-nk9z4
Events: <none>4.响应式更新账号的信息
[root@master231 serviceaccounts]
NAME TYPE DATA AGE
oldboyedu-harbor kubernetes.io/dockerconfigjson 1 66m
[root@master231 serviceaccounts]
[root@master231 serviceaccounts]
Name: xixi
Namespace: default
Labels: <none>
Annotations: <none>
Image pull secrets: <none>
Mountable secrets: xixi-token-nk9z4
Tokens: xixi-token-nk9z4
Events: <none>
[root@master231 serviceaccounts]
[root@master231 serviceaccounts]
serviceaccount/xixi patched
[root@master231 serviceaccounts]
[root@master231 serviceaccounts]
Name: xixi
Namespace: default
Labels: <none>
Annotations: <none>
Image pull secrets: oldboyedu-harbor
Mountable secrets: xixi-token-nk9z4
Tokens: xixi-token-nk9z4
Events: <none>
[root@master231 serviceaccounts]5.Pod使用sa账号拉取镜像
[root@master231 case-demo]
apiVersion: v1
kind: Secret
metadata:name: linux94-harbor
stringData:.dockerconfigjson: '{"auths":{"harbor.oldboyedu.com":{"username":"linux94","password":"Linux@2024","email":"linux94@oldboyedu.com","auth":"bGludXg5NDpMaW51eEAyMDI0"}}}'
type: kubernetes.io/dockerconfigjson---apiVersion: v1
imagePullSecrets:
- name: linux94-harbor
kind: ServiceAccount
metadata:name: linux94namespace: default---apiVersion: v1
kind: ReplicationController
metadata:name: oldboyedu-private-harbor
spec:replicas: 3selector:apps: linuxtemplate:spec:serviceAccount: linux94containers:- name: c1image: harbor.oldboyedu.com/oldboyedu-linux/alpine:latestimagePullPolicy: Alwaysstdin: truemetadata:labels:apps: linux
[root@master231 case-demo]
pod创建流程
- Pod创建流程:Pod的创建,删除,修改流程:1.执行kubectl命令时会加载"~/.kube/config",从而识别到apiserver的地址,端口及认证证书;2.apiserver进行证书认证,鉴权,语法检查,若成功则可以进行数据的读取或者写入;3.若用户是写入操作(创建,修改,删除)则需要修改etcd数据库的信息;4.如果创建Pod,此时scheduler负责Pod调度,将Pod调度到合适的worker节点,并将结果返回给ApiServer存储到etcd中;5.kubelet组件会周期性上报给apiServer节点,包括Pod内的容器资源(cpu,memory,disk,gpu,...)及worker宿主机节点状态,apiServer并将结果存储到etcd中,若有该节点的任务也会直接返回给该节点进行调度;6.kubelet开始调用CRI接口创建容器(依次创建pause,initContainers,containers);7.在运行过程中,若Pod容器,正常或者异常退出时,kubelet会根据重启策略是否重启容器(Never,Always,OnFailure);8.若一个节点怪掉,则需要controller manager介入维护,比如Pod副本数量缺失,则需要创建watch事件,要求控制器的副本数要达到标准,从而要创建新的Pod,此过程重复步骤4-6。
k8s部署jenkins
apiVersion: v1
kind: Namespace
metadata:name: devops---apiVersion: v1
kind: ReplicationController
metadata:name: oldboyedu-jenkinsnamespace: devops
spec:replicas: 1selector:apps: jenkinstemplate:spec:nodeName: worker233volumes:- name: datanfs:server: 10.0.0.231path: /oldboyedu/data/nfs-server/volumes/devops/jenkinscontainers:- name: c1image: harbor.oldboyedu.com/oldboyedu-devops/jenkins:2.479.1-alpine-jdk21ports:- containerPort: 8080volumeMounts:- name: datamountPath: /var/jenkins_home/metadata:labels:apps: jenkins---apiVersion: v1
kind: Service
metadata:name: svc-jenkinsnamespace: devops
spec:type: NodePortselector:apps: jenkinsports:- port: 8080nodePort: 30083
[root@master231 case-demo]3.温馨提示:- 在使用资源清单之前,应该先将Jenkins运行起来,安装常用的插件;- 再将/var/jenkins_home/数据拷贝到"/oldboyedu/data/nfs-server/volumes/devops/jenkins"中。