yaml
```
bash-5.1$ cat grafana.ini
[analytics]
check_for_updates = true
[grafana_net]
url = https://grafana.net
[log]
mode = console
[paths]
data = /var/lib/grafana/data
logs = /var/log/grafana
plugins = /home/grafana/plugins
provisioning = /etc/grafana/provisioning
```
```
# MySQL 一主多从部署
# 根据极客时间的《深入剖析 Kubernetes》 整理
# 测试部署成功
# kubernetes version: 1.20.13
apiVersion: v1
kind: ConfigMap
metadata:
name: mysql
labels:
app: mysql
data:
master.cnf: |
[mysqld]
log-bin
slave.cnf: |
[mysqld]
super-read-only
---
apiVersion: v1
kind: Service
metadata:
name: mysql-external
labels:
app: mysql
spec:
type: NodePort
ports:
- name: 'mysql-port'
port: 3306
targetPort: 3306
protocol: TCP
selector:
app: mysql
---
apiVersion: v1
kind: Service
metadata:
name: mysql
labels:
app: mysql
spec:
ports:
- name: mysql
port: 3306
clusterIP: None # Headless Service
selector:
app: mysql
---
apiVersion: v1
kind: Service
metadata:
name: mysql-read
labels:
app: mysql
spec:
ports:
- name: mysql
port: 3306
selector:
app: mysql
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: mysql
spec:
selector:
matchLabels:
app: mysql
serviceName: mysql
replicas: 3
template:
metadata:
labels:
app: mysql
spec:
initContainers:
- name: init-mysql
image: mysql:5.7
resources:
limits:
cpu: 500m
memory: 512Mi
command:
- bash
- "-c"
- |
set -ex
# 从Pod的序号，生成server-id
[[ `hostname` =~ -([0-9]+)$ ]] || exit 1
ordinal=${BASH_REMATCH[1]}
echo [mysqld] > /mnt/conf.d/server-id.cnf
# 由于server-id=0有特殊含义，我们给ID加一个100来避开它
echo server-id=$((100 + $ordinal)) >> /mnt/conf.d/server-id.cnf
# 如果Pod序号是0，说明它是Master节点，从ConfigMap里把Master的配置文件拷贝到/mnt/conf.d/目录；
# 否则，拷贝Slave的配置文件
if [[ $ordinal -eq 0 ]]; then
cp /mnt/config-map/master.cnf /mnt/conf.d/
else
cp /mnt/config-map/slave.cnf /mnt/conf.d/
fi
volumeMounts:
- name: conf
mountPath: /mnt/conf.d
- name: config-map
mountPath: /mnt/config-map
- name: clone-mysql
image: ist0ne/xtrabackup:1.0
command:
- bash
- "-c"
- |
set -ex
# 拷贝操作只需要在第一次启动时进行，所以如果数据已经存在，跳过
[[ -d /var/lib/mysql/mysql ]] && exit 0
# Master节点(序号为0)不需要做这个操作
[[ `hostname` =~ -([0-9]+)$ ]] || exit 1
ordinal=${BASH_REMATCH[1]}
[[ $ordinal -eq 0 ]] && exit 0
# 使用ncat指令，远程地从前一个节点拷贝数据到本地
ncat --recv-only mysql-$(($ordinal-1)).mysql 3307 | xbstream -x -C /var/lib/mysql
xtrabackup --prepare --target-dir=/var/lib/mysql
volumeMounts:
- name: data
mountPath: /var/lib/mysql
subPath: mysql
- name: conf
mountPath: /etc/mysql/conf.d
containers:
- name: mysql
image: mysql:5.7
env:
- name: MYSQL_ALLOW_EMPTY_PASSWORD
value: "1"
ports:
- name: mysql
containerPort: 3306
volumeMounts:
- name: data
mountPath: /var/lib/mysql
subPath: mysql
- name: conf
mountPath: /etc/mysql/conf.d
resources:
requests:
cpu: 500m
memory: 512Mi
limits:
cpu: 1
memory: 1Gi
livenessProbe:
exec:
command: ["mysqladmin","ping"]
initialDelaySeconds: 30
periodSeconds: 10
timeoutSeconds: 5
readinessProbe:
exec:
# 通过TCP连接的方式进行健康检查
command: ["mysql", "-h", "127.0.0.1", "-e", "SELECT 1"]
initialDelaySeconds: 5
periodSeconds: 2
timeoutSeconds: 1
- name: xtrabackup
image: ist0ne/xtrabackup:1.0
ports:
- name: xtrabackup
containerPort: 3307
command:
- bash
- "-c"
- |
set -ex
cd /var/lib/mysql
# 从备份信息文件里读取MASTER_LOG_FILEM和MASTER_LOG_POS这两个字段的值，用来拼装集群初始化SQL
if [[ -f xtrabackup_slave_info ]]; then
## 如果xtrabackup_slave_info文件存在，说明这个备份数据来自于另一个Slave节点。
## 这种情况下，XtraBackup工具在备份的时候，就已经在这个文件里自动生成了"CHANGE MASTER TO" SQL语句。
## 所以，我们只需要把这个文件重命名为change_master_to.sql.in，后面直接使用即可
mv xtrabackup_slave_info change_master_to.sql.in
# 所以，也就用不着xtrabackup_binlog_info了
rm -f xtrabackup_binlog_info
elif [[ -f xtrabackup_binlog_info ]]; then
# 如果只存在xtrabackup_binlog_info 文件，
# 那说明备份来自于Master节点，我们就需要解析这个备份信息文件，读取所需的两个字段的值
[[ `cat xtrabackup_binlog_info` =~ ^(.*?)[[:space:]]+(.*?)$ ]] || exit 1
rm xtrabackup_binlog_info
# 把两个字段的值拼装成SQL，写入change_master_to.sql.in文件
echo "CHANGE MASTER TO MASTER_LOG_FILE='${BASH_REMATCH[1]}', \
MASTER_LOG_POS=${BASH_REMATCH[2]}" > change_master_to.sql.in
fi
# 如果change_master_to.sql.in，就意味着需要做集群初始化工作
if [[ -f change_master_to.sql.in ]]; then
# 但一定要先等MySQL容器启动之后才能进行下一步连接MySQL的操作
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"
# 将文件change_master_to.sql.in改个名字，防止这个Container重启的时候，
# 因为又找到了change_master_to.sql.in，从而重复执行一遍这个初始化流程
mv change_master_to.sql.in change_master_to.sql.orig
# 使用change_master_to.sql.orig的内容，也是就是前面拼装的SQL，
# 组成一个完整的初始化和启动Slave的SQL语句
mysql -h 127.0.0.1 \
-e "$(<change_master_to.sql.in), \
MASTER_HOST='mysql-0.mysql', \
MASTER_USER='root', \
MASTER_PASSWORD='', \
MASTER_CONNECT_RETRY=10; \
START SLAVE;" || exit 1
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
volumes:
- name: conf
emptyDir: {}
- name: config-map
configMap:
name: mysql
# - name: data
# emptyDir: {}
volumeClaimTemplates:
- metadata:
name: data
spec:
storageClassName: "local"
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 1Gi
```
```
#-------------------------------------------------------
docker pull mysql:5.7
docker tag mysql:5.7 harbor.ev.com:8000/rancher/mysql:5.7
docker push harbor.ev.com:8000/rancher/mysql:5.7
docker pull registry.cn-hangzhou.aliyuncs.com/hxpdocker/xtrabackup:1.0
docker tag registry.cn-hangzhou.aliyuncs.com/hxpdocker/xtrabackup:1.0 harbor.ev.com:8000/rancher/xtrabackup:1.0
docker push harbor.ev.com:8000/rancher/xtrabackup:1.0
#-------------------------------------------------------
mkdir -p /data/k8sdata/erp/mysql-datadir-{1..5}
cat >> /etc/exports <<EOF
/data/k8sdata/erp/redis-datadir-1 *(rw,no_root_squash)
/data/k8sdata/erp/mysql-datadir-1 *(rw,no_root_squash)
/data/k8sdata/erp/mysql-datadir-2 *(rw,no_root_squash)
/data/k8sdata/erp/mysql-datadir-3 *(rw,no_root_squash)
/data/k8sdata/erp/mysql-datadir-4 *(rw,no_root_squash)
/data/k8sdata/erp/mysql-datadir-5 *(rw,no_root_squash)
EOF
systectl restart nfs
#-------------------------------------------------------
cat > mysql_class.yaml <<EOF
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
name: do-block-storage
provisioner: example.com/nfs
EOF
kubectl apply -f mysql_class.yaml
#-------------------------------------------------------
#创建ConfigMap
cat > mysql-configmap.yaml <<EOF
apiVersion: v1
kind: ConfigMap
metadata:
name: mysql-conf
labels:
app: mysql-conf
data:
master.cnf: |
# 仅master节点会使用该配置
[mysqld]
log-bin
log_bin_trust_function_creators=1
lower_case_table_names=1
slave.cnf: |
# 仅slave节点会使用该配置
[mysqld]
super-read-only
log_bin_trust_function_creators=1
EOF
#-------------------------------------------------------
## 创建headless Service
cat > mysql-master-services.yaml <<EOF
apiVersion: v1
kind: Service
metadata:
name: mysql
labels:
app: mysql
spec:
ports:
- name: mysql
port: 3306
clusterIP: None
selector:
app: mysql
EOF
##------------------------
cat > mysql-slave-services.yaml <<EOF
apiVersion: v1
kind: Service
metadata:
name: mysql-read
labels:
app: mysql
spec:
ports:
- name: mysql
port: 3306
selector:
app: mysql
EOF
kubectl apply -f mysql-configmap.yaml
kubectl apply -f mysql-master-services.yaml
kubectl apply -f mysql-slave-services.yaml
##---------------------------------------------------
cat mysql-statefulSet.yaml
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: mysql
spec:
selector:
matchLabels:
app: mysql
serviceName: mysql
replicas: 3
template:
metadata:
labels:
app: mysql
spec:
initContainers:
- name: init-mysql
image: harbor.ev.com:8000/rancher/mysql:5.7
command:
- bash
- "-c"
- |
set -ex
[[ `hostname` =~ -([0-9]+)$ ]] || exit 1
ordinal=${BASH_REMATCH[1]}
echo [mysqld] > /mnt/conf.d/server-id.cnf
echo server-id=$((100 + $ordinal)) >> /mnt/conf.d/server-id.cnf
if [[ $ordinal -eq 0 ]]; then
cp /mnt/config-map/master.cnf /mnt/conf.d/
else
cp /mnt/config-map/slave.cnf /mnt/conf.d/
fi
volumeMounts:
- name: conf
mountPath: /mnt/conf.d
- name: config-map
mountPath: /mnt/config-map
- name: clone-mysql
image: harbor.ev.com:8000/rancher/xtrabackup:1.0
command:
- bash
- "-c"
- |
set -ex
[[ -d /var/lib/mysql/mysql ]] && exit 0
[[ `hostname` =~ -([0-9]+)$ ]] || exit 1
ordinal=${BASH_REMATCH[1]}
[[ $ordinal -eq 0 ]] && exit 0
ncat --recv-only mysql-$(($ordinal-1)).mysql 3307 | xbstream -x -C /var/lib/mysql
xtrabackup --prepare --target-dir=/var/lib/mysql
volumeMounts:
- name: data
mountPath: /var/lib/mysql
subPath: mysql
- name: conf
mountPath: /etc/mysql/conf.d
containers:
- name: mysql
image: harbor.ev.com:8000/rancher/mysql:5.7
env:
- name: MYSQL_ALLOW_EMPTY_PASSWORD
value: "1"
ports:
- name: mysql
containerPort: 3306
volumeMounts:
- name: data
mountPath: /var/lib/mysql
subPath: mysql
- name: conf
mountPath: /etc/mysql/conf.d
resources:
requests:
cpu: 500m
memory: 200Mi
livenessProbe:
exec:
command: ["mysqladmin", "ping"]
initialDelaySeconds: 30
periodSeconds: 10
timeoutSeconds: 5
readinessProbe:
exec:
command: ["mysql", "-h", "127.0.0.1", "-e", "SELECT 1"]
initialDelaySeconds: 5
periodSeconds: 2
timeoutSeconds: 1
- name: xtrabackup
image: harbor.ev.com:8000/rancher/xtrabackup:1.0
ports:
- name: xtrabackup
containerPort: 3307
command:
- bash
- "-c"
- |
set -ex
cd /var/lib/mysql
if [[ -f xtrabackup_slave_info && "x$(<xtrabackup_slave_info)" != "x" ]]; then
cat xtrabackup_slave_info | sed -E 's/;$//g' > change_master_to.sql.in
rm -f xtrabackup_slave_info xtrabackup_binlog_info
elif [[ -f xtrabackup_binlog_info ]]; then
[[ `cat xtrabackup_binlog_info` =~ ^(.*?)[[:space:]]+(.*?)$ ]] || 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
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"
mysql -h 127.0.0.1 \
-e "$(<change_master_to.sql.in), \
MASTER_HOST='mysql-0.mysql', \
MASTER_USER='root', \
MASTER_PASSWORD='', \
MASTER_CONNECT_RETRY=10; \
START SLAVE;" || exit 1
mv change_master_to.sql.in change_master_to.sql.orig
fi
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-conf
volumeClaimTemplates:
- metadata:
name: data
labels:
app: mysql
spec:
accessModes: [ "ReadWriteOnce" ]
storageClassName: do-block-storage
resources:
requests:
storage: 2Gi
kubectl apply -f mysql-statefulSet.yaml
#--------------------------------------------
```