1、修改自己对应的命名空间
2、local pv的方式必须先创建好目录在给权限
3、sts部署文件密码都要修改好在部署
yaml资源文件如下：
bash
#配置mysql的root密码再部署，如果部署了在修改root密码就会失败，必须在初始化就把root密码修改好
#部署采用的local pv的模式持久化本地
# local-sc.yml
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
name: local-path
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: WaitForFirstConsumer #延迟绑定参数，很重要
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv-mysql-1
spec :
capacity:
storage: 5Gi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Retain
storageClassName: local-path
local:
path: /data/mysql-1
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values :
- cole-k8s-worker1
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv-mysql-2
spec :
capacity:
storage: 5Gi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Retain
storageClassName: local-path
local:
path: /data/mysql-2
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values :
- cole-k8s-worker2
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv-mysql-3
spec :
capacity:
storage: 5Gi
volumeMode: Filesystem
accessModes:
- ReadWriteOnce
persistentVolumeReclaimPolicy: Retain
storageClassName: local-path
local:
path: /data/mysql-3
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values :
- cole-k8s-worker3
---
#application/mysql/mysql-configmap.yaml
apiVersion: v1
kind: ConfigMap
metadata:
name: mysql
namespace: public-midd
labels:
app: mysql
data:
master.cnf: |
# Apply this config only on the master.
[mysqld]
log-bin
slave.cnf: |
# Apply this config only on slaves.
[mysqld]
super-read-only
---
# application/mysql/mysql-services.yaml
# Headless service for stable DNS entries of StatefulSet members.
apiVersion: v1
kind: Service
metadata:
name: mysql
namespace: public-midd
labels:
app: mysql
spec:
ports:
- name: mysql
port: 3306
clusterIP: None
selector:
app: mysql
---
# Client service for connecting to any MySQL instance for reads.
# For writes, you must instead connect to the master: mysql-0.mysql.
apiVersion: v1
kind: Service
metadata:
name: mysql-read
namespace: public-midd
labels:
app: mysql
spec:
ports:
- name: mysql
port: 3306
selector:
app: mysql
---
#application/mysql/mysql-statefulset.yaml
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: mysql
namespace: public-midd
spec:
selector:
matchLabels:
app: mysql
serviceName: mysql
replicas: 3
template:
metadata:
labels:
app: mysql
spec:
# 设置初始化容器，进行一些准备工作
initContainers:
- name: init-mysql
image: mysql:5.7
# 为每个MySQL节点配置service-id
# 如果节点序号是0，则使用master的配置， 其余节点使用slave的配置
command:
- bash
- "-c"
- |
set -ex
# Generate mysql server-id from pod ordinal index.
[[ `uname -n` =~ -([0-9]+)$ ]] || exit 1
ordinal=${BASH_REMATCH[1]}
echo [mysqld] > /mnt/conf.d/server-id.cnf
# Add an offset to avoid reserved server-id=0 value.
echo server-id=$((100 + $ordinal)) >> /mnt/conf.d/server-id.cnf
# Copy appropriate conf.d files from config-map to emptyDir.
if [[ $ordinal -eq 0 ]]; then
cp /mnt/config-map/master.cnf /mnt/conf.d/
else
cp /mnt/config-map/slave.cnf /mnt/conf.d/
fi
volumeMounts:
- name: time-localtime
mountPath: /etc/localtime
readOnly: true
- name: conf
mountPath: /mnt/conf.d
- name: config-map
mountPath: /mnt/config-map
- name: clone-mysql
image: yizhiyong/xtrabackup:latest
# 为除了节点序号为0的主节点外的其它节点，备份前一个节点的数据
command:
- bash
- "-c"
- |
set -ex
# Skip the clone if data already exists.
[[ -d /var/lib/mysql/mysql ]] && exit 0
# Skip the clone on master (ordinal index 0).
[[ `uname -n` =~ -([0-9]+)$ ]] || exit 1
ordinal=${BASH_REMATCH[1]}
[[ $ordinal -eq 0 ]] && exit 0
# Clone data from previous peer.
ncat --recv-only mysql-$(($ordinal-1)).mysql 3307 | xbstream -x -C /var/lib/mysql
# Prepare the backup.
xtrabackup --prepare --target-dir=/var/lib/mysql
volumeMounts:
- name: time-localtime
mountPath: /etc/localtime
readOnly: true
- name: data
mountPath: /var/lib/mysql
subPath: mysql
- name: conf
mountPath: /etc/mysql/conf.d
containers:
- name: mysql
image: mysql:5.7
# 设置支持免密登录
env:
# - name: MYSQL_ALLOW_EMPTY_PASSWORD
# value: "1"
- name: MYSQL_ROOT_PASSWORD
value: "123456"
ports:
- name: mysql
containerPort: 3306
volumeMounts:
- name: time-localtime
mountPath: /etc/localtime
readOnly: true
- name: data
mountPath: /var/lib/mysql
subPath: mysql
- name: conf
mountPath: /etc/mysql/conf.d
resources:
# 设置启动pod需要的资源，官方文档上需要500m cpu，1Gi memory。
# 我本地测试的时候，会因为资源不足，报1 Insufficient cpu, 1 Insufficient memory错误，所以我改小了点
requests:
# m是千分之一的意思，100m表示需要0.1个cpu
cpu: 100m
# Mi是兆的意思，需要100M 内存
memory: 100Mi
livenessProbe:
# 使用mysqladmin ping命令，对MySQL节点进行探活检测
# 在节点部署完30秒后开始，每10秒检测一次，超时时间为5秒
exec:
command: [ "mysqladmin", "ping" ]
initialDelaySeconds: 30
periodSeconds: 10
timeoutSeconds: 5
readinessProbe:
# 对节点服务可用性进行检测， 启动5秒后开始，每2秒检测一次，超时时间1秒
exec:
# Check we can execute queries over TCP (skip-networking is off).
command: [ "mysql", "-h", "127.0.0.1", "-p123456", "-e", "SELECT 1" ]
initialDelaySeconds: 5
periodSeconds: 2
timeoutSeconds: 1
- name: xtrabackup
image: yizhiyong/xtrabackup:latest
ports:
- name: xtrabackup
containerPort: 3307
# 开始进行备份文件校验、解析和开始同步
command:
- bash
- "-c"
- |
set -ex
cd /var/lib/mysql
# Determine binlog position of cloned data, if any.
if [[ -f xtrabackup_slave_info && "x$(<xtrabackup_slave_info)" != "x" ]]; then
# XtraBackup already generated a partial "CHANGE MASTER TO" query
# because we're cloning from an existing slave. (Need to remove the tailing semicolon!)
cat xtrabackup_slave_info | sed -E 's/;$//g' > change_master_to.sql.in
# Ignore xtrabackup_binlog_info in this case (it's useless).
rm -f xtrabackup_slave_info xtrabackup_binlog_info
elif [[ -f xtrabackup_binlog_info ]]; then
# We're cloning directly from master. Parse binlog position.
[[ `cat xtrabackup_binlog_info` =~ ^(.*?)[[:space:]]+(.*?)$ ]] || exit 1
rm -f xtrabackup_binlog_info xtrabackup_slave_info
echo "CHANGE MASTER TO MASTER_LOG_FILE='${BASH_REMATCH[1]}',\
MASTER_LOG_POS=${BASH_REMATCH[2]}" > change_master_to.sql.in
fi
# Check if we need to complete a clone by starting replication.
if [[ -f change_master_to.sql.in ]]; then
echo "Waiting for mysqld to be ready (accepting connections)"
until mysql -h 127.0.0.1 -p"123456" -e "SELECT 1"; do sleep 1; done
echo "Initializing replication from clone position"
mysql -h 127.0.0.1 -p"123456"\
-e "$(<change_master_to.sql.in), \
MASTER_HOST='mysql-0.mysql', \
MASTER_USER='root', \
MASTER_PASSWORD='123456', \
MASTER_CONNECT_RETRY=10; \
START SLAVE;" || exit 1
# In case of container restart, attempt this at-most-once.
mv change_master_to.sql.in change_master_to.sql.orig
fi
# Start a server to send backups when requested by peers.
exec ncat --listen --keep-open --send-only --max-conns=1 3307 -c \
"xtrabackup --backup --slave-info --stream=xbstream --host=127.0.0.1 --user=root --password=123456"
volumeMounts:
- name: time-localtime
mountPath: /etc/localtime
readOnly: true
- name: data
mountPath: /var/lib/mysql
subPath: mysql
- name: conf
mountPath: /etc/mysql/conf.d
resources:
requests:
cpu: 100m
memory: 100Mi
volumes:
- name: time-localtime
hostPath:
path: /etc/localtime
- name: conf
emptyDir: { }
- name: config-map
configMap:
name: mysql
# 设置PVC
volumeClaimTemplates:
- metadata:
name: data
spec:
storageClassName: local-path
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 5Gi