主机规划
主机名IP地址角色操作系统硬件配置master10.62.158.200管理节点CentOS 72 Core/4G Memorynode0110.62.158.201工作节点01CentOS 72 Core/4G Memorynode0210.62.158.202工作节点02CentOS 72 Core/4G Memorynfs10.62.158.203文件共享节点CentOS 72 Core/4G Memory
设置主机名
[root@localhost ~]# hostnamectl set-hostname nfs[root@localhost ~]# ls
anaconda-ks.cfg sysconfigure.sh
[root@localhost ~]# exit
登出
Connection closed by foreign host.
Disconnected from remote host(测试机 - 203) at 09:49:26.
安装NFS共享存储服务【服务端】
安装NFS软件包
[root@nfs ~]# yum install nfs-utils -y
创建NFS共享目录,该共享目录后续为多个服务提供共享文件夹
[root@nfs ~]# mkdir -p /data/nfs/{mysql-master,mysql-slaver-01,mysql-slaver-02}
修改NFS配置文件,指定共享目录是哪个
cat >> /etc/exports << EOF
/data/nfs/mysql-master 10.62.158.*(rw,sync,no_root_squash)/data/nfs/mysql-slaver-01 10.62.158.*(rw,sync,no_root_squash)/data/nfs/mysql-slaver-02 10.62.158.*(rw,sync,no_root_squash)
EOF
安装NFS共享存储服务【客户端】
k8s集群节点也需要安装
nfs-utils
用于访问NFS服务端(
nfs-utils
中不仅包含服务端程序,也包含客户端程序,不需要启动NFS程序,仅安装即可),否则无法访问NFS服务端
master
&node01
&node02
节点安装客户端
[root@master ~]# yum install nfs-utils -y
[root@node01 ~]# yum install nfs-utils -y
[root@node02 ~]# yum install nfs-utils -y
master
&node01
&node02
节点访问NFS服务端,查看共享信息,此时 master 节点 & node01节点 & node02节点 就可以使用共享目录进行文件的读写操作了
[root@master ~]# showmount -e 10.62.158.203
Export list for 10.62.158.203:
/data/nfs/mysql-slaver-02 10.62.158.*/data/nfs/mysql-slaver-01 10.62.158.*/data/nfs/mysql-master 10.62.158.*
[root@node01 ~]# showmount -e 10.62.158.203
Export list for 10.62.158.203:
/data/nfs/mysql-slaver-02 10.62.158.*/data/nfs/mysql-slaver-01 10.62.158.*/data/nfs/mysql-master 10.62.158.*
[root@node02 ~]# showmount -e 10.62.158.203
Export list for 10.62.158.203:
/data/nfs/mysql-slaver-02 10.62.158.*/data/nfs/mysql-slaver-01 10.62.158.*/data/nfs/mysql-master 10.62.158.*
前置工作
创建命名空间
[root@master ~]# kubectl create namespace deploy-mysql
namespace/deploy-mysql created
[root@master ~]# kubectl get ns
NAME STATUS AGE
default Active 6d21h
deploy-mysql Active 13s
kube-node-lease Active 6d21h
kube-public Active 6d21h
kube-system Active 6d21h
创建MySQL密码的Secret
[root@master ~]# kubectl create secret generic mysql-password --namespace=deploy-mysql --from-literal=mysql_root_password=root --dry-run=client -o=yaml
apiVersion: v1
data:
mysql_root_password: cm9vdA==
kind: Secret
metadata:
creationTimestamp: null
name: mysql-password
namespace: deploy-mysql
复制保存生成后的内容为 mysql-secret.yaml 文件
[root@master ~]# vim mysql-secret.yaml
apiVersion: v1
data:
mysql_root_password: cm9vdA==
kind: Secret
metadata:
creationTimestamp: null
name: mysql-password
namespace: deploy-mysql
创建Secret
[root@master ~]# kubectl apply -f mysql-secret.yaml
secret/mysql-password created
列出命名空间 deploy-mysql 中的所有 Secrets
[root@master ~]# kubectl get secret -n deploy-mysql
NAME TYPEDATA AGE
default-token-272c8 kubernetes.io/service-account-token 3 8m51s
mysql-password Opaque 1 25s
搭建部署mysql主节点
创建持久卷(PV)和持久卷声明(PVC)
[root@master ~]# vim mysql-master-pv-pvc.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: deploy-mysql-master-nfs-pv # PV 的名称
namespace: deploy-mysql # PV 所属的命名空间
spec:
capacity:
storage: 1Gi # PV 的存储容量为 1GB(根据实际调整)
accessModes:
- ReadWriteMany # 允许多个 Pod 同时对 PV 进行读写访问
nfs:
server: 10.62.158.203 # NFS 服务器的 IP 地址
path: /data/nfs/mysql-master # NFS 服务器上暴露的目录路径
storageClassName: "nfs"# PV 使用的存储类名称为 "nfs"---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: deploy-mysql-master-nfs-pvc # PVC 的名称
namespace: deploy-mysql # PVC 所属的命名空间
spec:
accessModes:
- ReadWriteMany # PVC 的访问模式为 ReadWriteMany
storageClassName: "nfs"# PVC 使用的存储类名称为 "nfs"
resources:
requests:
storage: 1Gi # 请求 1GB 的存储空间
volumeName: deploy-mysql-master-nfs-pv # 将 PVC 绑定到 PV 的名称为 "deploy-mysql-master-nfs-pv"
创建 PV 和 PVC
[root@master ~]# kubectl apply -f mysql-master-pv-pvc.yaml
persistentvolume/deploy-mysql-master-nfs-pv created
persistentvolumeclaim/deploy-mysql-master-nfs-pvc created
查看PV 和 PVC
[root@master ~]# kubectl get pv,pvc -n deploy-mysql
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
persistentvolume/deploy-mysql-master-nfs-pv 5Gi RWX Retain Bound deploy-mysql/deploy-mysql-master-nfs-pvc nfs 46s
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
persistentvolumeclaim/deploy-mysql-master-nfs-pvc Bound deploy-mysql-master-nfs-pv 5Gi RWX nfs 46s
创建主节点的mysql配置文件,同步的数据库为:db_k8s
[root@master ~]# vi my.cnf
[mysqld]skip-host-cache # 不使用主机缓存skip-name-resolve # 不解析主机名
datadir = /var/lib/mysql # 数据文件存放目录
socket = /var/run/mysqld/mysqld.sock # MySQL服务器套接字文件路径
secure-file-priv = /var/lib/mysql-files # 指定安全文件的位置
pid-file = /var/run/mysqld/mysqld.pid # PID文件路径
user = mysql # MySQL服务运行的用户
secure-file-priv = NULL # 禁用安全文件访问限制
server-id = 1 # 服务器唯一标识符
log-bin = master-bin # 启用二进制日志,并指定日志文件名
log_bin_index = master-bin.index # 二进制日志索引文件路径
binlog_do_db = db_k8s # 仅记录指定数据库的操作到二进制日志
binlog_ignore_db = information_schema # 忽略记录指定数据库的操作到二进制日志
binlog_ignore_db = mysql # 忽略记录指定数据库的操作到二进制日志
binlog_ignore_db = performance_schema # 忽略记录指定数据库的操作到二进制日志
binlog_ignore_db = sys # 忽略记录指定数据库的操作到二进制日志
binlog-format = ROW # 设置二进制日志格式为行格式[client]
socket = /var/run/mysqld/mysqld.sock # 客户端连接MySQL服务器时使用的套接字文件路径!includedir /etc/mysql/conf.d/ # 包含额外的配置文件目录
生成 master 节点的mysql ConfigMap 的 YAML 资源描述文件,指定mysql 配置文件 my.cnf
[root@master ~]# kubectl create configmap mysql-master-configmap -n deploy-mysql --from-file=my.cnf=my.cnf --dry-run=client -o yaml
apiVersion: v1
data:
my.cnf: |[mysqld]skip-host-cache # 不使用主机缓存skip-name-resolve # 不解析主机名
datadir = /var/lib/mysql # 数据文件存放目录
socket = /var/run/mysqld/mysqld.sock # MySQL服务器套接字文件路径
secure-file-priv = /var/lib/mysql-files # 指定安全文件的位置
pid-file = /var/run/mysqld/mysqld.pid # PID文件路径
user = mysql # MySQL服务运行的用户
secure-file-priv = NULL # 禁用安全文件访问限制
server-id = 1 # 服务器唯一标识符
log-bin = master-bin # 启用二进制日志,并指定日志文件名
log_bin_index = master-bin.index # 二进制日志索引文件路径
binlog_do_db = db_k8s # 仅记录指定数据库的操作到二进制日志
binlog_ignore_db = information_schema # 忽略记录指定数据库的操作到二进制日志
binlog_ignore_db = mysql # 忽略记录指定数据库的操作到二进制日志
binlog_ignore_db = performance_schema # 忽略记录指定数据库的操作到二进制日志
binlog_ignore_db = sys # 忽略记录指定数据库的操作到二进制日志
binlog-format = ROW # 设置二进制日志格式为行格式[client]
socket = /var/run/mysqld/mysqld.sock # 客户端连接MySQL服务器时使用的套接字文件路径!includedir /etc/mysql/conf.d/ # 包含额外的配置文件目录
kind: ConfigMap
metadata:
creationTimestamp: null
name: mysql-master-configmap
namespace: deploy-mysql
查看当前命名空间中的configmap
[root@master ~]# kubectl get configmaps -n deploy-mysql
NAME DATA AGE
kube-root-ca.crt 1 140m
mysql-master-configmap 1 97m
复制保存生成后的内容为文件 mysql-master-configmap.yaml,并额外添加svc、StatefulSet的配置
[root@master ~]# vim mysql-master-configmap.yaml
apiVersion: v1
data:
my.cnf: |+[mysqld]skip-host-cache # 不使用主机缓存skip-name-resolve # 不解析主机名
datadir = /var/lib/mysql # 数据文件存放目录
socket = /var/run/mysqld/mysqld.sock # MySQL服务器套接字文件路径
secure-file-priv = /var/lib/mysql-files # 指定安全文件的位置
pid-file = /var/run/mysqld/mysqld.pid # PID文件路径
user = mysql # MySQL服务运行的用户
secure-file-priv = NULL # 禁用安全文件访问限制
server-id = 1 # 服务器唯一标识符
log-bin = master-bin # 启用二进制日志,并指定日志文件名
binlog_do_db = db_k8s # 仅记录指定数据库的操作到二进制日志
log_bin_index = master-bin.index # 二进制日志索引文件路径
binlog_ignore_db = information_schema # 忽略记录指定数据库的操作到二进制日志
binlog_ignore_db = mysql # 忽略记录指定数据库的操作到二进制日志
binlog_ignore_db = performance_schema # 忽略记录指定数据库的操作到二进制日志
binlog_ignore_db = sys # 忽略记录指定数据库的操作到二进制日志
binlog-format = ROW # 设置二进制日志格式为行格式[client]
socket = /var/run/mysqld/mysqld.sock # 客户端连接MySQL服务器时使用的套接字文件路径
kind: ConfigMap
metadata:
creationTimestamp: null
name: mysql-master-configmap
namespace: deploy-mysql
---
apiVersion: v1
kind: Service
metadata:
name: deploy-mysql-master-svc # 定义服务的名称
namespace: deploy-mysql # 定义服务所属的命名空间
labels:
app: mysql-master
spec:
ports:
- port: 3306 # 服务暴露的端口号
name: mysql
targetPort: 3306
nodePort: 30306 # NodePort 类型服务的端口
selector:
app: mysql-master # 选择器,选择哪些 Pod 作为后端type: NodePort # 服务类型为 NodePort
sessionAffinity: ClientIP # 会话亲和性设置为 ClientIP---
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: deploy-mysql-master # StatefulSet 的名称
namespace: deploy-mysql # StatefulSet 所属的命名空间
spec:
selector:
matchLabels:
app: mysql-master # 选择器,用于选择管理的 Pod
serviceName: "deploy-mysql-master-svc"# 关联的 Service 的名称
replicas: 1 # 副本数
template:
metadata:
labels:
app: mysql-master # Pod 模板的标签
spec:
terminationGracePeriodSeconds: 10 # 终止优雅期的秒数
containers:
- args:
---character-set-server=utf8mb4 # MySQL 参数设置---collation-server=utf8mb4_unicode_ci
---lower_case_table_names=1
---default-time_zone=+8:00
name: mysql # 容器的名称
image: mysql:8.0.34 # 容器镜像
ports:
- containerPort: 3306 # 容器监听的端口号
name: mysql
volumeMounts:
- name: mysql-data# 挂载的持久化卷
mountPath: /var/lib/mysql
- name: mysql-conf # 挂载的 ConfigMap
mountPath: /etc/my.cnf
readOnly: true
subPath: my.cnf
env: # 容器的环境变量- name: MYSQL_ROOT_PASSWORD
valueFrom:
secretKeyRef:
key: mysql_root_password
name: mysql-password # 引用的 Secret 的名称
volumes:
- name: mysql-data# 持久化卷的名称
persistentVolumeClaim:
claimName: deploy-mysql-master-nfs-pvc # 持久化卷声明的名称- name: mysql-conf # ConfigMap 的名称
configMap:
name: mysql-master-configmap # ConfigMap 的名称
items:
- key: my.cnf # ConfigMap 中的键值对
mode: 0644 # 文件权限
path: my.cnf # 挂载路径
应用 YAML 文件到 Kubernetes 集群
[root@master ~]# kubectl apply -f mysql-master-configmap.yaml
configmap/mysql-master-configmap created
service/deploy-mysql-master-svc created
statefulset.apps/deploy-mysql-master created
获取在指定命名空间[ deploy-mysq ]中所有资源的详细信息
[root@master ~]# kubectl get all -o wide -n deploy-mysql
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/deploy-mysql-master-0 1/1 Running 0 100s 192.168.196.131 node01 <none> <none>
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/deploy-mysql-master-svc NodePort 10.109.63.216 <none> 3306:30306/TCP 100s app=mysql-master
NAME READY AGE CONTAINERS IMAGES
statefulset.apps/deploy-mysql-master 1/1 100s mysql mysql:8.0.34
查看Pod日志
[root@master ~]# kubectl logs deploy-mysql-master-0 -n deploy-mysql
查看 NFS 服务器中的共享目录,检查其中的文件并确认是否存在 log-bin 文件:master-bin
[root@nfs nfs]# ls -l /data/nfs/mysql-master/
总用量 96720
-rw-r----- 1 polkitd input 56 4月 19 10:54 auto.cnf
-rw------- 1 polkitd input 1676 4月 19 10:55 ca-key.pem
-rw-r--r-- 1 polkitd input 1112 4月 19 10:55 ca.pem
-rw-r--r-- 1 polkitd input 1112 4月 19 10:55 client-cert.pem
-rw------- 1 polkitd input 1680 4月 19 10:55 client-key.pem
-rw-r----- 1 polkitd input 196608 4月 19 11:11 #ib_16384_0.dblwr-rw-r----- 1 polkitd input 8585216 4月 19 10:55 #ib_16384_1.dblwr-rw-r----- 1 polkitd input 3541 4月 19 11:07 ib_buffer_pool
-rw-r----- 1 polkitd input 12582912 4月 19 11:09 ibdata1
-rw-r----- 1 polkitd input 12582912 4月 19 11:10 ibtmp1
drwxr-x--- 2 polkitd input 4096 4月 19 11:09 #innodb_redo
drwxr-x--- 2 polkitd input 187 4月 19 11:09 #innodb_temp-rw-r----- 1 polkitd input 180 4月 19 10:55 master-bin.000001
-rw-r----- 1 polkitd input 180 4月 19 10:55 master-bin.000002
-rw-r----- 1 polkitd input 180 4月 19 10:59 master-bin.000003
-rw-r----- 1 polkitd input 180 4月 19 11:07 master-bin.000004
-rw-r----- 1 polkitd input 157 4月 19 11:09 master-bin.000005
-rw-r----- 1 polkitd input 100 4月 19 11:09 master-bin.index
drwxr-x--- 2 polkitd input 143 4月 19 10:55 mysql
-rw-r----- 1 polkitd input 31457280 4月 19 11:09 mysql.ibd
lrwxrwxrwx 1 polkitd input 27 4月 19 11:09 mysql.sock -> /var/run/mysqld/mysqld.sock
drwxr-x--- 2 polkitd input 8192 4月 19 10:55 performance_schema
-rw------- 1 polkitd input 1676 4月 19 10:55 private_key.pem
-rw-r--r-- 1 polkitd input 452 4月 19 10:55 public_key.pem
-rw-r--r-- 1 polkitd input 1112 4月 19 10:55 server-cert.pem
-rw------- 1 polkitd input 1680 4月 19 10:55 server-key.pem
drwxr-x--- 2 polkitd input 28 4月 19 10:55 sys
-rw-r----- 1 polkitd input 16777216 4月 19 11:11 undo_001
-rw-r----- 1 polkitd input 16777216 4月 19 11:11 undo_002
搭建部署mysql主节点slave01
创建持久卷(PV)和持久卷声明(PVC)
[root@master ~]# vim mysql-slave01-pv-pvc.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: deploy-mysql-slave01-nfs-pv # PV 的名称
namespace: deploy-mysql # PV 所属的命名空间
spec:
capacity:
storage: 1Gi # PV 的存储容量为 1GB(根据实际调整)
accessModes:
- ReadWriteMany # 允许多个 Pod 同时对 PV 进行读写访问
nfs:
server: 10.62.158.203 # NFS 服务器的 IP 地址
path: /data/nfs/mysql-slaver-01 # NFS 服务器上暴露的目录路径
storageClassName: "nfs"# PV 使用的存储类名称为 "nfs"---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: deploy-mysql-slave01-nfs-pvc # PVC 的名称
namespace: deploy-mysql # PVC 所属的命名空间
spec:
accessModes:
- ReadWriteMany # PVC 的访问模式为 ReadWriteMany
storageClassName: "nfs"# PVC 使用的存储类名称为 "nfs"
resources:
requests:
storage: 1Gi # 请求 1GB 的存储空间
volumeName: deploy-mysql-slave01-nfs-pv # 将 PVC 绑定到 PV 的名称为 "deploy-mysql-master-nfs-pv"
创建 PV 和 PVC
[root@master ~]# kubectl apply -f mysql-slave01-pv-pvc.yaml
persistentvolume/deploy-mysql-slave01-nfs-pv created
persistentvolumeclaim/deploy-mysql-slave01-nfs-pvc created
查看PV 和 PVC
[root@master ~]# kubectl get pv,pvc -n deploy-mysql
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
persistentvolume/deploy-mysql-master-nfs-pv 5Gi RWX Retain Bound deploy-mysql/deploy-mysql-master-nfs-pvc nfs 114m
persistentvolume/deploy-mysql-slave01-nfs-pv 1Gi RWX Retain Bound deploy-mysql/deploy-mysql-slave01-nfs-pvc nfs 27s
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
persistentvolumeclaim/deploy-mysql-master-nfs-pvc Bound deploy-mysql-master-nfs-pv 5Gi RWX nfs 114m
persistentvolumeclaim/deploy-mysql-slave01-nfs-pvc Bound deploy-mysql-slave01-nfs-pv 1Gi RWX nfs 27s
创建 salve01 从节点的 mysql 配置文件
[root@master ~]# vim my.cnf
[mysqld]skip-host-cache # 不使用主机缓存skip-name-resolve # 不进行主机名解析
datadir = /var/lib/mysql # MySQL 数据目录
socket = /var/run/mysqld/mysqld.sock # MySQL Socket 文件路径
secure-file-priv = /var/lib/mysql-files # 安全文件目录
pid-file = /var/run/mysqld/mysqld.pid # MySQL 进程 ID 文件路径
user = mysql # MySQL 运行用户
secure-file-priv = NULL # 安全文件权限设置
server-id = 2 # 从节点服务器 ID
log-bin = slave-bin # 二进制日志文件名
relay-log = slave-relay-bin # 中继日志文件名
relay-log-index = slave-relay-bin.index # 中继日志索引文件名[client]
socket = /var/run/mysqld/mysqld.sock # MySQL 客户端 Socket 文件路径
生成 slave01 节点的 mysql ConfigMap 的 YAML 资源描述文件
[root@master ~]# kubectl create configmap mysql-slave01-configmap -n deploy-mysql --from-file=my.cnf --dry-run=client -o yaml
apiVersion: v1
data:
my.cnf: |[mysqld]skip-host-cache # 不使用主机缓存skip-name-resolve # 不进行主机名解析
datadir = /var/lib/mysql # MySQL 数据目录
socket = /var/run/mysqld/mysqld.sock # MySQL Socket 文件路径
secure-file-priv = /var/lib/mysql-files # 安全文件目录
pid-file = /var/run/mysqld/mysqld.pid # MySQL 进程 ID 文件路径
user = mysql # MySQL 运行用户
secure-file-priv = NULL # 安全文件权限设置
server-id = 2 # 从节点服务器 ID
log-bin = slave-bin # 二进制日志文件名
relay-log = slave-relay-bin # 中继日志文件名
relay-log-index = slave-relay-bin.index # 中继日志索引文件名[client]
socket = /var/run/mysqld/mysqld.sock # MySQL 客户端 Socket 文件路径
kind: ConfigMap
metadata:
creationTimestamp: null
name: mysql-slave01-configmap
namespace: deploy-mysql
复制保存生成后的内容为文件 mysql-slave01-configmap.yaml,添加svc、StatefulSet的配置
[root@master ~]# vim mysql-slave01-configmap.yaml
apiVersion: v1
data:
my.cnf: |[mysqld]skip-host-cache # 不使用主机缓存skip-name-resolve # 不进行主机名解析
datadir = /var/lib/mysql # MySQL 数据目录
socket = /var/run/mysqld/mysqld.sock # MySQL Socket 文件路径
secure-file-priv = /var/lib/mysql-files # 安全文件目录
pid-file = /var/run/mysqld/mysqld.pid # MySQL 进程 ID 文件路径
user = mysql # MySQL 运行用户
secure-file-priv = NULL # 安全文件权限设置
server-id = 2 # 从节点服务器 ID
log-bin = slave-bin # 二进制日志文件名
relay-log = slave-relay-bin # 中继日志文件名
relay-log-index = slave-relay-bin.index # 中继日志索引文件名[client]
socket = /var/run/mysqld/mysqld.sock # MySQL 客户端 Socket 文件路径
kind: ConfigMap
metadata:
creationTimestamp: null
name: mysql-slave01-configmap
namespace: deploy-mysql
---
apiVersion: v1
kind: Service
metadata:
name: deploy-mysql-slave-svc # MySQL从节点服务名称
namespace: deploy-mysql # 部署的命名空间
labels:
app: mysql-slave
spec:
ports:
- port: 3306
name: mysql
targetPort: 3306
nodePort: 30308 # 暴露的节点端口
selector:
app: mysql-slave
type: NodePort
sessionAffinity: ClientIP
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: deploy-mysql-slave-01 # MySQL从节点StatefulSet名称
namespace: deploy-mysql # 部署的命名空间
spec:
selector:
matchLabels:
app: mysql-slave-01
serviceName: "deploy-mysql-slave-svc"# 关联的Service名称
replicas: 1
template:
metadata:
labels:
app: mysql-slave-01
spec:
terminationGracePeriodSeconds: 10
containers:
- args:
---character-set-server=utf8mb4
---collation-server=utf8mb4_unicode_ci
---lower_case_table_names=1
---default-time_zone=+8:00
name: mysql
# image: docker.io/library/mysql:8.0.34
image: mysql:8.0.34 # MySQL镜像地址
ports:
- containerPort: 3306
name: mysql
volumeMounts:
- name: mysql-data
mountPath: /var/lib/mysql
- name: mysql-conf
mountPath: /etc/my.cnf
readOnly: true
subPath: my.cnf
env:
- name: MYSQL_ROOT_PASSWORD
valueFrom:
secretKeyRef:
key: mysql_root_password
name: mysql-password
volumes:
- name: mysql-data
persistentVolumeClaim:
claimName: deploy-mysql-slave01-nfs-pvc # 持久卷声明名称- name: mysql-conf
configMap:
name: mysql-slave01-configmap # ConfigMap名称
items:
- key: my.cnf
mode: 0644
path: my.cnf
应用 YAML 文件到 Kubernetes 集群
[root@master ~]# kubectl apply -f mysql-slave01-configmap.yaml
configmap/mysql-slave01-configmap created
service/deploy-mysql-slave-svc created
statefulset.apps/deploy-mysql-slave-01 created
获取在指定命名空间(deploy-mysql)中所有资源的详细信息
[root@master ~]# kubectl get all -o wide -n deploy-mysql
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/deploy-mysql-master-0 1/1 Running 0 138m 192.168.196.133 node01 <none> <none>
pod/deploy-mysql-slave-01-0 1/1 Running 0 6s 192.168.196.134 node01 <none> <none>
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/deploy-mysql-master-svc NodePort 10.109.46.105 <none> 3306:30306/TCP 138m app=mysql-master
service/deploy-mysql-slave-svc NodePort 10.99.187.187 <none> 3306:30308/TCP 6s app=mysql-slave
NAME READY AGE CONTAINERS IMAGES
statefulset.apps/deploy-mysql-master 1/1 138m mysql mysql:8.0.34
statefulset.apps/deploy-mysql-slave-01 1/1 6s mysql mysql:8.0.34
搭建部署mysql主节点slave02
创建持久卷(PV)和持久卷声明(PVC)
[root@master ~]# vim mysql-slave02-pv-pvc.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: deploy-mysql-slave02-nfs-pv # PV 的名称
namespace: deploy-mysql # PV 所属的命名空间
spec:
capacity:
storage: 1Gi # PV 的存储容量为 1GB(根据实际调整)
accessModes:
- ReadWriteMany # 允许多个 Pod 同时对 PV 进行读写访问
nfs:
server: 10.62.158.203 # NFS 服务器的 IP 地址
path: /data/nfs/mysql-slaver-02 # NFS 服务器上暴露的目录路径
storageClassName: "nfs"# PV 使用的存储类名称为 "nfs"---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: deploy-mysql-slave02-nfs-pvc # PVC 的名称
namespace: deploy-mysql # PVC 所属的命名空间
spec:
accessModes:
- ReadWriteMany # PVC 的访问模式为 ReadWriteMany
storageClassName: "nfs"# PVC 使用的存储类名称为 "nfs"
resources:
requests:
storage: 1Gi # 请求 1GB 的存储空间
volumeName: deploy-mysql-slave02-nfs-pv # 将 PVC 绑定到 PV 的名称为 "deploy-mysql-master-nfs-pv"
创建 PV 和 PVC
[root@master ~]# kubectl apply -f mysql-slave02-pv-pvc.yaml
persistentvolume/deploy-mysql-slave02-nfs-pv created
persistentvolumeclaim/deploy-mysql-slave02-nfs-pvc created
查看PV 和 PVC
[root@master ~]# kubectl get pv,pvc -n deploy-mysql
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
persistentvolume/deploy-mysql-master-nfs-pv 5Gi RWX Retain Bound deploy-mysql/deploy-mysql-master-nfs-pvc nfs 147m
persistentvolume/deploy-mysql-slave01-nfs-pv 1Gi RWX Retain Bound deploy-mysql/deploy-mysql-slave01-nfs-pvc nfs 33m
persistentvolume/deploy-mysql-slave02-nfs-pv 1Gi RWX Retain Bound deploy-mysql/deploy-mysql-slave02-nfs-pvc nfs 25s
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
persistentvolumeclaim/deploy-mysql-master-nfs-pvc Bound deploy-mysql-master-nfs-pv 5Gi RWX nfs 147m
persistentvolumeclaim/deploy-mysql-slave01-nfs-pvc Bound deploy-mysql-slave01-nfs-pv 1Gi RWX nfs 33m
persistentvolumeclaim/deploy-mysql-slave02-nfs-pvc Bound deploy-mysql-slave02-nfs-pv 1Gi RWX nfs 25s
创建 salve02 从节点的 mysql 配置文件
[root@master ~]# vim my.cnf
[mysqld]skip-host-cache # 不使用主机缓存skip-name-resolve # 不进行主机名解析
datadir = /var/lib/mysql # MySQL 数据目录
socket = /var/run/mysqld/mysqld.sock # MySQL Socket 文件路径
secure-file-priv = /var/lib/mysql-files # 安全文件目录
pid-file = /var/run/mysqld/mysqld.pid # MySQL 进程 ID 文件路径
user = mysql # MySQL 运行用户
secure-file-priv = NULL # 安全文件权限设置
server-id = 3 # 从节点服务器 ID
log-bin = slave-bin # 二进制日志文件名
relay-log = slave-relay-bin # 中继日志文件名
relay-log-index = slave-relay-bin.index # 中继日志索引文件名[client]
socket = /var/run/mysqld/mysqld.sock # MySQL 客户端 Socket 文件路径
生成 slave02 节点的 mysql ConfigMap 的 YAML 资源描述文件
[root@master ~]# kubectl create configmap mysql-slave02-configmap -n deploy-mysql --from-file=my.cnf --dry-run=client -o yaml
apiVersion: v1
data:
my.cnf: |[mysqld]skip-host-cache # 不使用主机缓存skip-name-resolve # 不进行主机名解析
datadir = /var/lib/mysql # MySQL 数据目录
socket = /var/run/mysqld/mysqld.sock # MySQL Socket 文件路径
secure-file-priv = /var/lib/mysql-files # 安全文件目录
pid-file = /var/run/mysqld/mysqld.pid # MySQL 进程 ID 文件路径
user = mysql # MySQL 运行用户
secure-file-priv = NULL # 安全文件权限设置
server-id = 3 # 从节点服务器 ID
log-bin = slave-bin # 二进制日志文件名
relay-log = slave-relay-bin # 中继日志文件名
relay-log-index = slave-relay-bin.index # 中继日志索引文件名[client]
socket = /var/run/mysqld/mysqld.sock # MySQL 客户端 Socket 文件路径
kind: ConfigMap
metadata:
creationTimestamp: null
name: mysql-slave02-configmap
namespace: deploy-mysql
复制保存生成后的内容为文件 mysql-slave02-configmap.yaml,添加svc、StatefulSet的配置
[root@master ~]# vim mysql-slave02-configmap.yaml
apiVersion: v1
data:
my.cnf: |[mysqld]skip-host-cache # 不使用主机缓存skip-name-resolve # 不进行主机名解析
datadir = /var/lib/mysql # MySQL 数据目录
socket = /var/run/mysqld/mysqld.sock # MySQL Socket 文件路径
secure-file-priv = /var/lib/mysql-files # 安全文件目录
pid-file = /var/run/mysqld/mysqld.pid # MySQL 进程 ID 文件路径
user = mysql # MySQL 运行用户
secure-file-priv = NULL # 安全文件权限设置
server-id = 3 # 从节点服务器 ID
log-bin = slave-bin # 二进制日志文件名
relay-log = slave-relay-bin # 中继日志文件名
relay-log-index = slave-relay-bin.index # 中继日志索引文件名[client]
socket = /var/run/mysqld/mysqld.sock # MySQL 客户端 Socket 文件路径
kind: ConfigMap
metadata:
creationTimestamp: null
name: mysql-slave02-configmap
namespace: deploy-mysql
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: deploy-mysql-slave-02 # MySQL从节点StatefulSet名称
namespace: deploy-mysql # 部署的命名空间
spec:
selector:
matchLabels:
app: mysql-slave-02
serviceName: "deploy-mysql-slave-svc"# 关联的Service名称
replicas: 1
template:
metadata:
labels:
app: mysql-slave-02
spec:
terminationGracePeriodSeconds: 10
containers:
- args:
---character-set-server=utf8mb4
---collation-server=utf8mb4_unicode_ci
---lower_case_table_names=1
---default-time_zone=+8:00
name: mysql
# image: docker.io/library/mysql:8.0.34
image: mysql:8.0.34 # MySQL镜像地址
ports:
- containerPort: 3306
name: mysql
volumeMounts:
- name: mysql-data
mountPath: /var/lib/mysql
- name: mysql-conf
mountPath: /etc/my.cnf
readOnly: true
subPath: my.cnf
env:
- name: MYSQL_ROOT_PASSWORD
valueFrom:
secretKeyRef:
key: mysql_root_password
name: mysql-password
volumes:
- name: mysql-data
persistentVolumeClaim:
claimName: deploy-mysql-slave02-nfs-pvc # 持久卷声明名称- name: mysql-conf
configMap:
name: mysql-slave02-configmap # ConfigMap名称
items:
- key: my.cnf
mode: 0644
path: my.cnf
应用 YAML 文件到 Kubernetes 集群
[root@master ~]# kubectl apply -f mysql-slave02-configmap.yaml
configmap/mysql-slave02-configmap created
statefulset.apps/deploy-mysql-slave-02 created
获取在指定命名空间(deploy-mysql)中所有资源的详细信息
[root@master ~]# kubectl get all -o wide -n deploy-mysql
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/deploy-mysql-master-0 1/1 Running 0 165m 192.168.196.133 node01 <none> <none>
pod/deploy-mysql-slave-01-0 1/1 Running 0 27m 192.168.196.134 node01 <none> <none>
pod/deploy-mysql-slave-02-0 1/1 Running 0 9s 192.168.196.135 node01 <none> <none>
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/deploy-mysql-master-svc NodePort 10.109.46.105 <none> 3306:30306/TCP 165m app=mysql-master
service/deploy-mysql-slave-svc NodePort 10.99.187.187 <none> 3306:30308/TCP 27m app=mysql-slave
NAME READY AGE CONTAINERS IMAGES
statefulset.apps/deploy-mysql-master 1/1 165m mysql mysql:8.0.34
statefulset.apps/deploy-mysql-slave-01 1/1 27m mysql mysql:8.0.34
statefulset.apps/deploy-mysql-slave-02 1/1 9s mysql mysql:8.0.34
使三台服务器组成一个集群
启动一个交互式会话,连接到名为 deploy-mysql-master-0 的 Pod,查看主节点的状态
[root@master ~]# kubectl exec -it -n deploy-mysql deploy-mysql-master-0 -- mysql -uroot -p
Enter password:
查看主节点的状态
mysql> show master status;+-------------------+----------+--------------+-------------------------------------------------+-------------------+| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |+-------------------+----------+--------------+-------------------------------------------------+-------------------+| master-bin.000005 | 157 | db_k8s | information_schema,mysql,performance_schema,sys ||+-------------------+----------+--------------+-------------------------------------------------+-------------------+
1 row in set(0.00 sec)
配置从节点(Slave)连接到主节点(Master)
- 进入从节点mysql pod内部,执行以下命令加入集群中
CHANGE MASTER TO
MASTER_HOST='deploy-mysql-master-0.deploy-mysql-master-svc.deploy-mysql.svc.cluster.local',
MASTER_PORT=3306,
MASTER_USER='root',
MASTER_PASSWORD='root',
MASTER_LOG_FILE='master-bin.000003',
MASTER_LOG_POS=157,
MASTER_CONNECT_RETRY=30,
GET_MASTER_PUBLIC_KEY=1;
- 需要注意下面的几个参数:
master_host: 这个参数是master的地址,kubernetes提供的解析规则是 pod名称.service名称.命名空间.svc.cluster.local ,所以我们master的mysql地址是 deploy-mysql-master-0.deploy-mysql-master-svc.deploy-mysql.svc.cluster.local
master_port: 主节点的mysql端口,我们没改默认是3306
master_user: 登录到主节点的mysql用户
master_password: 登录到主节点要用到的密码
master_log_file: 我们之前查看mysql主节点状态时候的 File 字段
master_log_pos: 我们之前查看mysql主节点状态时候的 Position 字段
master_connect_retry: 主节点重连时间
get_master_public_key: 连接主mysql的公钥获取方式
slave01 加入master
进入deploy-mysql-slave-01-0 的 Pod,密码root
[root@master ~]# kubectl exec -itn deploy-mysql pod/deploy-mysql-slave-01-0 -- mysql -uroot -p
配置从节点(Slave)连接到主节点(Master)的参数,执行以下命令来配置它们连接到主节点
CHANGE MASTER TO
MASTER_HOST='deploy-mysql-master-0.deploy-mysql-master-svc.deploy-mysql.svc.cluster.local',
MASTER_PORT=3306,
MASTER_USER='root',
MASTER_PASSWORD='root',
MASTER_LOG_FILE='master-bin.000005',
MASTER_LOG_POS=157,
MASTER_CONNECT_RETRY=30,
GET_MASTER_PUBLIC_KEY=1;
启动从节点的复制进程
mysql>start slave;
Query OK,0rows affected,1 warning (0.01 sec)
查看slave状态
mysql>show slave status;
slave02 加入master
进入deploy-mysql-slave-02-0 的 Pod,密码root
[root@master ~]# kubectl exec -itn deploy-mysql pod/deploy-mysql-slave-02-0 -- mysql -uroot -p
配置从节点(Slave)连接到主节点(Master)的参数,执行以下命令来配置它们连接到主节点
CHANGE MASTER TO
MASTER_HOST='deploy-mysql-master-0.deploy-mysql-master-svc.deploy-mysql.svc.cluster.local',
MASTER_PORT=3306,
MASTER_USER='root',
MASTER_PASSWORD='root',
MASTER_LOG_FILE='master-bin.000005',
MASTER_LOG_POS=157,
MASTER_CONNECT_RETRY=30,
GET_MASTER_PUBLIC_KEY=1;
启动从节点的复制进程
mysql>start slave;
Query OK,0rows affected,1 warning (0.01 sec)
查看slave状态
mysql>show slave status;
验证集群主从复制效果
- 主节点操作会被同步到两个子节点中
- 子节点操作不会被同步到主节点中
- 子节点操作会同步到另一个自己点中
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