k8s部署mysql集群
临时操作后续细化补充
1.创建存储目录：
mkdir -p /server/yaml/app/mysql;cd /server/yaml/app/mysql
2.创建pv
cat mysql.pv.yamlapiVersion: v1
kind: PersistentVolume
metadata:
name: pv-nfs-mysql01 #创建的pv名称可创建多个.
namespace: mt-math #属于的命名空间
spec:
capacity:
storage: 5Gi #创建的pv容量为1G
accessModes:
- ReadWriteOnce #pv的访问模式:可读可写可挂在多个节点
persistentVolumeReclaimPolicy: Retain #回收策略
#storageClassName: pv-nfs-mysql
nfs: #创建的pv数据来源
path: /NFS/mysql/pv01 #数据源目录
server: 192.168.0.14 #数据源ip
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv-nfs-mysql02 #创建的pv名称可创建多个.
namespace: mt-math #属于的命名空间
spec:
capacity:
storage: 5Gi #创建的pv容量为1G
accessModes:
- ReadWriteOnce #pv的访问模式:可读可写可挂在多个节点
persistentVolumeReclaimPolicy: Retain #回收策略
#storageClassName: pv-nfs-mysql
nfs: #创建的pv数据来源
path: /NFS/mysql/pv02 #数据源目录
server: 192.168.0.14 #数据源ip
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv-nfs-mysql03 #创建的pv名称可创建多个.
namespace: mt-math #属于的命名空间
spec:
capacity:
storage: 5Gi #创建的pv容量为1G
accessModes:
- ReadWriteOnce #pv的访问模式:可读可写可挂在多个节点
persistentVolumeReclaimPolicy: Retain #回收策略
#storageClassName: pv-nfs-mysql
nfs: #创建的pv数据来源
path: /NFS/mysql/pv03 #数据源目录
server: 192.168.0.14 #数据源ip
2.创建master server 与 slave server
cat mysql_configmap.yamlapiVersion: v1
kind: ConfigMap
metadata:
name: mysql
namespace: mt-math
labels:
app: mysql
data:
master.cnf: |
# Apply this config only on the master.
[mysqld]
log-bin
log_bin_trust_function_creators=1
#关闭MySQL对创建存储函数实施的限制
lower_case_table_names=1
#设置大小写不敏感
slave.cnf: |
# Apply this config only on slaves.
[mysqld]
super-read-only
#只读模式
log_bin_trust_function_creators=1
创建mysql无头服务 这里创建两个实例
cat mysql.statefulset.yamlapiVersion: apps/v1
kind: StatefulSet
metadata:
name: mysql
namespace: mt-math
spec:
selector:
matchLabels:
app: mysql
serviceName: mysql
replicas: 2
template:
metadata:
namespace: mt-math
labels:
app: mysql
spec:
initContainers:
- name: init-mysql
image: mysql:5.7
command:
- bash
- "-c"
- |
set -ex
# Generate mysql server-id from pod ordinal index.
[[ `hostname` =~ -([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 [[ $ordinal -eq 0 ]]; then
cp /mnt/config-map/master.cnf /mnt/conf.d/
else
cp /mnt/config-map/slave.cnf /mnt/conf.d/
fi
volumeMounts:
- name: conf
mountPath: /mnt/conf.d
- name: config-map
mountPath: /mnt/config-map
- name: clone-mysql
image: twoeo/gcr.io-google-samples-xtrabackup
command:
- bash
- "-c"
- |
set -ex
# Skip the clone if data already exists.
[[ -d /var/lib/mysql/mysql ]] && exit 0
# Skip the clone on master (ordinal index 0).
[[ `hostname` =~ -([0-9]+)$ ]] || exit 1
ordinal=${BASH_REMATCH[1]}
[[ $ordinal -eq 0 ]] && exit 0
# Clone data from previous peer.
ncat --recv-only mysql-$(($ordinal-1)).mysql 3307 | xbstream -x -C /var/lib/mysql
# Prepare the backup.
xtrabackup --prepare --target-dir=/var/lib/mysql
volumeMounts:
- name: data
mountPath: /var/lib/mysql
subPath: mysql
- name: conf
mountPath: /etc/mysql/conf.d
containers:
- name: mysql
image: mysql:5.7
env:
- name: MYSQL_ALLOW_EMPTY_PASSWORD
value: "1"
ports:
- name: mysql
containerPort: 3306
volumeMounts:
- name: data
mountPath: /var/lib/mysql
subPath: mysql
- name: conf
mountPath: /etc/mysql/conf.d
resources:
requests:
cpu: 500m
memory: 1Gi
livenessProbe:
exec:
command: ["mysqladmin", "ping"]
initialDelaySeconds: 30
periodSeconds: 10
timeoutSeconds: 5
readinessProbe:
exec:
# Check we can execute queries over TCP (skip-networking is off).
command: ["mysql", "-h", "127.0.0.1", "-e", "SELECT 1"]
initialDelaySeconds: 5
periodSeconds: 2
timeoutSeconds: 1
- name: xtrabackup
image: twoeo/gcr.io-google-samples-xtrabackup
ports:
- name: xtrabackup
containerPort: 3307
command:
- bash
- "-c"
- |
set -ex
cd /var/lib/mysql
# Determine binlog position of cloned data, if any.
if [[ -f xtrabackup_slave_info ]]; then
# XtraBackup already generated a partial "CHANGE MASTER TO" query
# because we're cloning from an existing slave.
mv xtrabackup_slave_info change_master_to.sql.in
# Ignore xtrabackup_binlog_info in this case (it's useless).
rm -f xtrabackup_binlog_info
elif [[ -f xtrabackup_binlog_info ]]; then
# We're cloning directly from master. Parse binlog position.
[[ `cat xtrabackup_binlog_info` =~ ^(.*?)[[:space:]]+(.*?)$ ]] || exit 1
rm xtrabackup_binlog_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 -e "SELECT 1"; do sleep 1; done
echo "Initializing replication from clone position"
# In case of container restart, attempt this at-most-once.
mv change_master_to.sql.in change_master_to.sql.orig
mysql -h 127.0.0.1 <<EOF
$(<change_master_to.sql.orig),
MASTER_HOST='mysql-0.mysql',
MASTER_USER='root',
MASTER_PASSWORD='',
MASTER_CONNECT_RETRY=10;
START SLAVE;
EOF
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"
volumeMounts:
- name: data
mountPath: /var/lib/mysql
subPath: mysql
- name: conf
mountPath: /etc/mysql/conf.d
resources:
requests:
cpu: 100m
memory: 100Mi
volumes:
- name: conf
emptyDir: {}
- name: config-map
configMap:
name: mysql
volumeClaimTemplates:
- metadata:
name: data
namespace: mt-math
spec:
accessModes: ["ReadWriteOnce"]
resources:
requests:
storage: 5Gi
文件列表：
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