k8s生产环境部署mysql_kubernetes中部署mysql集群并持久化存储
环境主节点:172.19.2.50从节点:172.19.2.51172.19.2.140部署完成后通过各节点的30336端口访问mysql账号root,密码abcd1234如:mysql-h172.19.2.50-P30336-uroot-pabcd1234部署完成后通过galera可以让集群3个节点间的数据一致容器内访问mysql时,可以通过所有k8s节点的30336端口访问,也可以...
环境主节点:172.19.2.50
从节点:
172.19.2.51
172.19.2.140
部署完成后通过各节点的30336端口访问mysql账号root,密码abcd1234
如:
mysql -h 172.19.2.50 -P 30336 -uroot -pabcd1234
部署完成后通过galera可以让集群3个节点间的数据一致
容器内访问mysql时,可以通过所有k8s节点的30336端口访问,也可以使用k8s服务中的内部入口访问,如mysql.mysql:3306,dns会自动解析mysql.mysql到对应的服务集群
一、在主节点创建目录mkdir -pv /mysql_data/datadir-mariadb-0
mkdir -pv /mysql_data/datadir-mariadb-1
mkdir -pv /mysql_data/datadir-mariadb-2
二、修改部署文件cd /opt/kubernetes-mysql-cluster
命名空间部署文件vim 00namespace.yml
---
apiVersion: v1
kind: Namespace
metadata:
name: mysql
pvc部署文件vim 10pvc.yml
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: mysql-mariadb-0
namespace: mysql
spec:
accessModes:
- ReadWriteOnce#这里为pvc的访问模式
resources:
requests:
storage: 10Gi#这里调整要挂载的pvc大小
selector:
matchLabels:#这里要和pv的标签对应
app: mariadb
podindex: "0"
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: mysql-mariadb-1
namespace: mysql
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 10Gi
selector:
matchLabels:
app: mariadb
podindex: "1"
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: mysql-mariadb-2
namespace: mysql
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 10Gi
selector:
matchLabels:
app: mariadb
podindex: "2"
mariadb服务文件vim 20mariadb-service.yml
# the "Headless Service, used to control the network domain"
---
apiVersion: v1
kind: Service
metadata:
name: mariadb
namespace: mysql
spec:
clusterIP: None
selector:
app: mariadb
ports:
- port: 3306
name: mysql
- port: 4444
name: sst
- port: 4567
name: replication
- protocol: UDP
port: 4567
name: replicationudp
- port: 4568
name: ist
mysql服务文件vim 30mysql-service.yml
---
apiVersion: v1
kind: Service
metadata:
name: mysql
namespace: mysql
spec:
ports:
- port: 3306
name: mysql
targetPort: 3306
nodePort: 30336#这里为porxy映射端口
selector:
app: mariadb
type: NodePort
载入配置文件vim 40configmap.sh
#!/bin/bash
DIR=`dirname "$BASH_SOURCE"`
kubectl create configmap "conf-d" --from-file="$DIR/conf-d/" --namespace=mysql
输入mysql初始密码文件vim 41secret.sh
#!/bin/bash
echo -n Please enter mysql root password for upload to k8s secret:
read -s rootpw
echo
kubectl create secret generic mysql-secret --namespace=mysql --from-literal=rootpw=$rootpw
部署有状态集群文件vim 50mariadb.yml
apiVersion: apps/v1beta1
kind: StatefulSet
metadata:
name: mariadb
namespace: mysql
spec:
serviceName: "mariadb"
replicas: 1#这里是要启动的节点的数量
template:
metadata:
labels:
app: mariadb
spec:
terminationGracePeriodSeconds: 10
containers:
- name: mariadb
image: mariadb:10.1.22#这里修改使用的镜像文件
ports:
- containerPort: 3306
name: mysql
- containerPort: 4444
name: sst
- containerPort: 4567
name: replication
- containerPort: 4567
protocol: UDP
name: replicationudp
- containerPort: 4568
name: ist
env:
- name: MYSQL_ROOT_PASSWORD
valueFrom:
secretKeyRef:
name: mysql-secret
key: rootpw
- name: MYSQL_INITDB_SKIP_TZINFO
value: "yes"
args:
- --character-set-server=utf8mb4
- --collation-server=utf8mb4_unicode_ci
# Remove after first replicas=1 create
- --wsrep-new-cluster#这里在执行的时候代表会创建新集群,新增节点的时候要注释掉
volumeMounts:
- name: mysql
mountPath: /var/lib/mysql
- name: conf
mountPath: /etc/mysql/conf.d
- name: initdb
mountPath: /docker-entrypoint-initdb.d
volumes:
- name: conf
configMap:
name: conf-d
- name: initdb
emptyDir: {}
volumeClaimTemplates:
- metadata:
name: mysql
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 10Gi
调整集群节点到3个的文件vim 70unbootstrap.sh
#!/bin/bash
DIR=`dirname "$BASH_SOURCE"`
set -e
set -x
cp "$DIR/50mariadb.yml" "$DIR/50mariadb.yml.unbootstrap.yml"
sed -i 's/replicas: 1/replicas: 3/' "$DIR/50mariadb.yml.unbootstrap.yml"
sed -i 's/- --wsrep-new-cluster/#- --wsrep-new-cluster/' "$DIR/50mariadb.yml.unbootstrap.yml"
kubectl apply -f "$DIR/50mariadb.yml.unbootstrap.yml"
rm "$DIR/50mariadb.yml.unbootstrap.yml"
创建目录mkdir -pv bootstrap conf-d
创建pv脚本vim bootstrap/pv.sh
#!/bin/bash
echo "Note that in for example GKE a PetSet will have PersistentVolume(s) and PersistentVolumeClaim(s) created for it automatically"
dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && cd .. && pwd )"
path="$dir/data"
echo "Please enter a path where to store data during local testing: ($path)"
read newpath
[ -n "$newpath" ] && path=$newpath
cat bootstrap/pv-template.yml | sed "s|/tmp/k8s-data|$path|" | kubectl create -f -
创建挂载pv文件vim bootstrap/pv-template.yml
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: datadir-mariadb-0
labels:#这里的标签要和pvc的matchLabels对应
app: mariadb
podindex: "0"
spec:
accessModes:
- ReadWriteOnce#这里是pv的访问模式,必须要与pvc相同
capacity:
storage: 10Gi#这里是要创建的pv的大小
hostPath:
path: /mysql_data/datadir-mariadb-0#这里为挂载到本地的路径
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: datadir-mariadb-1
labels:
app: mariadb
podindex: "1"
spec:
accessModes:
- ReadWriteOnce
capacity:
storage: 10Gi
hostPath:
path: /mysql_data/datadir-mariadb-1
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: datadir-mariadb-2
labels:
app: mariadb
podindex: "2"
spec:
accessModes:
- ReadWriteOnce
capacity:
storage: 10Gi
hostPath:
path: /mysql_data/datadir-mariadb-2
删除pv脚本vim bootstrap/rm.sh
#!/bin/bash
echo "Note that in for example GKE a PetSet will have PersistentVolume(s) and PersistentVolumeClaim(s) created for it automatically"
dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && cd .. && pwd )"
path="$dir/data"
echo "Please enter a path where to store data during local testing: ($path)"
read newpath
[ -n "$newpath" ] && path=$newpath
cat bootstrap/pv-template.yml | sed "s|/tmp/k8s-data|$path|" | kubectl delete -f -
集群同步galera的配置文件vim conf-d/galera.cnf
[server]
[mysqld]
[galera]
wsrep_on=ON
wsrep_provider="/usr/lib/galera/libgalera_smm.so"
wsrep_cluster_address="gcomm://mariadb-0.mariadb,mariadb-1.mariadb,mariadb-2.mariadb"
binlog_format=ROW
default_storage_engine=InnoDB
innodb_autoinc_lock_mode=2
wsrep-sst-method=rsync
bind-address=0.0.0.0
[embedded]
[mariadb]
[mariadb-10.1]
三、在kubernetes上部署mariadb集群
kubernetes所有节点执行docker pull mariadb:10.1.22
主节点执行cd /opt/kubernetes-mysql-cluster
sh bootstrap/pv.sh
kubectl create -f 00namespace.yml
kubectl create -f 10pvc.yml
./40configmap.sh
./41secret.sh
设置数据库root密码为abcd1234
kubectl create -f 20mariadb-service.yml
kubectl create -f 30mysql-service.yml
kubectl create -f 50mariadb.yml
四、增加集群节点至3个./70unbootstrap.sh
五、清理kubernetes上的mysql集群
主节点上执行cd /opt/kubernetes-mysql-cluster
kubectl delete -f ./
sh bootstrap/rm.sh
所有节点执行rm -rf /mysql_data/datadir-mariadb-0/*
rm -rf /mysql_data/datadir-mariadb-1/*
rm -rf /mysql_data/datadir-mariadb-2/*
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