k8s常见的微服务中间件部署之MySQL主从
一.编写MySQL主从同步资源清单
1.资源清单准备
[root@master241 01-mysql-master-slave]# cat 01-cm-mysql.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: mysql-conf
data:
master: |
[mysqld]
server_id=100
skip-host-cache
skip-name-resolve
datadir=/var/lib/mysql
socket=/var/run/mysqld/mysqld.sock
secure-file-priv=/var/lib/mysql-files
user=mysql
pid-file=/var/run/mysqld/mysqld.pid
character-set-server=utf8mb4
default_storage_engine=InnoDB
[client]
socket=/var/run/mysqld/mysqld.sock
!includedir /etc/mysql/conf.d/
slave: |
[mysqld]
server_id=200
skip-host-cache
skip-name-resolve
datadir=/var/lib/mysql
socket=/var/run/mysqld/mysqld.sock
secure-file-priv=/var/lib/mysql-files
user=mysql
pid-file=/var/run/mysqld/mysqld.pid
character-set-server=utf8mb4
default_storage_engine=InnoDB
read_only=ON
relay_log=relay-log
relay_log_index=relay-log.index
[client]
socket=/var/run/mysqld/mysqld.sock
!includedir /etc/mysql/conf.d/
[root@master241 01-mysql-master-slave]#
[root@master241 01-mysql-master-slave]#
[root@master241 01-mysql-master-slave]# cat 02-secret-mysql.yaml
apiVersion: v1
kind: Secret
metadata:
name: mysql-passwd
type: Opaque
stringData:
MYSQL_ROOT_PASSWORD: yinzhengjie
[root@master241 01-mysql-master-slave]#
[root@master241 01-mysql-master-slave]#
[root@master241 01-mysql-master-slave]# cat 03-deploy-mysql.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: deploy-master
spec:
replicas: 1
selector:
matchLabels:
apps: master
template:
metadata:
labels:
apps: master
spec:
volumes:
- name: data
configMap:
name: mysql-conf
items:
- key: master
path: my.cnf
containers:
- image: docker.io/library/mysql:8.0.36-oracle
volumeMounts:
- name: data
mountPath: /etc/my.cnf
subPath: my.cnf
name: c1
env:
- name: MYSQL_ROOT_PASSWORD
valueFrom:
secretKeyRef:
name: mysql-passwd
key: MYSQL_ROOT_PASSWORD
- name: MYSQL_DATABASE
value: yinzhengjie
- name: MYSQL_USER
value: admin
- name: MYSQL_PASSWORD
value: jasonyin2020
args:
- --character-set-server=utf8
- --collation-server=utf8_bin
- --default-authentication-plugin=mysql_native_password
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: deploy-slave
spec:
replicas: 1
selector:
matchLabels:
apps: slave
template:
metadata:
labels:
apps: slave
spec:
volumes:
- name: data
configMap:
name: mysql-conf
items:
- key: slave
path: my.cnf
containers:
- image: docker.io/library/mysql:8.0.36-oracle
volumeMounts:
- name: data
mountPath: /etc/my.cnf
subPath: my.cnf
name: c1
env:
- name: MYSQL_ALLOW_EMPTY_PASSWORD
value: "yes"
args:
- --character-set-server=utf8
- --collation-server=utf8_bin
- --default-authentication-plugin=mysql_native_password
[root@master241 01-mysql-master-slave]#
[root@master241 01-mysql-master-slave]#
[root@master241 01-mysql-master-slave]# cat 04-svc-mysql.yaml
apiVersion: v1
kind: Service
metadata:
name: svc-mysql
spec:
ports:
- port: 3306
selector:
apps: master
type: ClusterIP
[root@master241 01-mysql-master-slave]#
2.部署服务
[root@master241 01-mysql-master-slave]# ll
total 24
drwxr-xr-x 2 root root 4096 Jul 10 14:56 ./
drwxr-xr-x 3 root root 4096 Jul 10 11:38 ../
-rw-r--r-- 1 root root 979 Jul 10 11:38 01-cm-mysql.yaml
-rw-r--r-- 1 root root 119 Jul 10 11:57 02-secret-mysql.yaml
-rw-r--r-- 1 root root 1822 Jul 10 14:56 03-deploy-mysql.yaml
-rw-r--r-- 1 root root 134 Jul 10 11:39 04-svc-mysql.yaml
[root@master241 01-mysql-master-slave]#
[root@master241 01-mysql-master-slave]#
[root@master241 01-mysql-master-slave]# kubectl apply -f .
configmap/mysql-conf created
secret/mysql-passwd created
deployment.apps/deploy-master created
deployment.apps/deploy-slave created
service/svc-mysql created
[root@master241 01-mysql-master-slave]#
[root@master241 01-mysql-master-slave]# kubectl get pods -o wide -l "apps in (master,slave)"
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
deploy-master-7cb4bd8f69-9v74l 2/2 Running 0 63s 10.100.165.152 worker242 <none> <none>
deploy-slave-b56d49979-vcxst 2/2 Running 0 63s 10.100.207.16 worker243 <none> <none>
[root@master241 01-mysql-master-slave]#
二.配置主从同步
1.主库创建拷贝数据的账号
[root@master241 01-mysql-master-slave]# kubectl exec -it deploy-master-7cb4bd8f69-9v74l -- mysql -pyinzhengjie
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 9
Server version: 8.0.36 MySQL Community Server - GPL
Copyright (c) 2000, 2024, Oracle and/or its affiliates.
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.
mysql> SELECT @@server_id;
+-------------+
| @@server_id |
+-------------+
| 100 |
+-------------+
1 row in set (0.00 sec)
mysql> CREATE USER jasonyin IDENTIFIED BY 'yinzhengjie';
Query OK, 0 rows affected (0.01 sec)
mysql> GRANT REPLICATION SLAVE ON *.* TO 'jasonyin';
Query OK, 0 rows affected (0.00 sec)
mysql> SHOW GRANTS FOR jasonyin;
+--------------------------------------------------+
| Grants for jasonyin@% |
+--------------------------------------------------+
| GRANT REPLICATION SLAVE ON *.* TO `jasonyin`@`%` |
+--------------------------------------------------+
1 row in set (0.00 sec)
mysql> SHOW MASTER STATUS;
+---------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+---------------+----------+--------------+------------------+-------------------+
| binlog.000002 | 668 | | | |
+---------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
mysql>
2.从库和主库建立链接
[root@master241 ~]# kubectl exec -it deploy-slave-b56d49979-vcxst -- mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 8.0.36 MySQL Community Server - GPL
Copyright (c) 2000, 2024, Oracle and/or its affiliates.
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.
mysql> SELECT @@server_id;
+-------------+
| @@server_id |
+-------------+
| 200 |
+-------------+
1 row in set (0.00 sec)
mysql> CHANGE MASTER TO
-> MASTER_HOST='svc-mysql',
-> MASTER_USER='jasonyin',
-> MASTER_PASSWORD='yinzhengjie',
-> MASTER_PORT=3306,
-> MASTER_LOG_FILE='binlog.000002',
-> MASTER_LOG_POS=668,
-> MASTER_CONNECT_RETRY=10;
Query OK, 0 rows affected, 10 warnings (0.01 sec)
mysql> START SLAVE;
Query OK, 0 rows affected, 1 warning (0.01 sec)
mysql> SHOW SLAVE STATUS\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for source to send event
Master_Host: svc-mysql
Master_User: jasonyin
Master_Port: 3306
Connect_Retry: 10
Master_Log_File: binlog.000002
Read_Master_Log_Pos: 668
Relay_Log_File: relay-log .000002
Relay_Log_Pos: 323
Relay_Master_Log_File: binlog.000002
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB:
Replicate_Ignore_DB:
Replicate_Do_Table:
Replicate_Ignore_Table:
Replicate_Wild_Do_Table:
Replicate_Wild_Ignore_Table:
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 668
Relay_Log_Space: 538
Until_Condition: None
Until_Log_File:
Until_Log_Pos: 0
Master_SSL_Allowed: No
Master_SSL_CA_File:
Master_SSL_CA_Path:
Master_SSL_Cert:
Master_SSL_Cipher:
Master_SSL_Key:
Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
Last_IO_Errno: 0
Last_IO_Error:
Last_SQL_Errno: 0
Last_SQL_Error:
Replicate_Ignore_Server_Ids:
Master_Server_Id: 100
Master_UUID: 027807bd-5d5b-11f0-aa95-6aee3b288e24
Master_Info_File: mysql.slave_master_info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Replica has read all relay log; waiting for more updates
Master_Retry_Count: 86400
Master_Bind:
Last_IO_Error_Timestamp:
Last_SQL_Error_Timestamp:
Master_SSL_Crl:
Master_SSL_Crlpath:
Retrieved_Gtid_Set:
Executed_Gtid_Set:
Auto_Position: 0
Replicate_Rewrite_DB:
Channel_Name:
Master_TLS_Version:
Master_public_key_path:
Get_master_public_key: 0
Network_Namespace:
1 row in set, 1 warning (0.00 sec)
mysql>
3.测试验证主从同步
3.1 主库写入数据
[root@master241 01-mysql-master-slave]# kubectl exec -it deploy-master-7cb4bd8f69-9v74l -- mysql -pyinzhengjie
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 11
Server version: 8.0.36 MySQL Community Server - GPL
Copyright (c) 2000, 2024, Oracle and/or its affiliates.
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.
mysql> CREATE DATABASE wordpress;
Query OK, 1 row affected (0.01 sec)
mysql> USE wordpress
Database changed
mysql> CREATE TABLE blog(id INT PRIMARY KEY AUTO_INCREMENT,name VARCHAR(255) NOT NULL, hobby VARCHAR(255) NOT NULL);
Query OK, 0 rows affected (0.01 sec)
mysql> INSERT INTO blog(name,hobby) VALUES ('YinZhengJie','https://www.cnblogs.com/yinzhengjie');
Query OK, 1 row affected (0.01 sec)
mysql> SELECT * FROM blog;
+----+-------------+-------------------------------------+
| id | name | hobby |
+----+-------------+-------------------------------------+
| 1 | YinZhengJie | https://www.cnblogs.com/yinzhengjie |
+----+-------------+-------------------------------------+
1 row in set (0.00 sec)
mysql>
3.2 从库查询数据
[root@master241 ~]# kubectl exec -it deploy-slave-b56d49979-vcxst -- mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 15
Server version: 8.0.36 MySQL Community Server - GPL
Copyright (c) 2000, 2024, Oracle and/or its affiliates.
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.
mysql> SHOW DATABASES;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
| wordpress |
+--------------------+
5 rows in set (0.00 sec)
mysql> SHOW TABLES FROM wordpress;
+---------------------+
| Tables_in_wordpress |
+---------------------+
| blog |
+---------------------+
1 row in set (0.00 sec)
mysql> SELECT * FROM wordpress.blog;
+----+-------------+-------------------------------------+
| id | name | hobby |
+----+-------------+-------------------------------------+
| 1 | YinZhengJie | https://www.cnblogs.com/yinzhengjie |
+----+-------------+-------------------------------------+
1 row in set (0.00 sec)
mysql>
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