1, helm安装mysql
- 如果没有指明root密码，则使用随即生成的密码: helm install --name mysql stable/mysql
a, 手动分配pv
helm现有的各应用程序的charts仓库: https://github.com/helm/charts/tree/master/stable/mysql
[root@master ~]# helm install --name mysql1 \
--set mysqlRootPassword=root123456,mysqlUser=test,mysqlPassword=test,mysqlDatabase=test \
stable/mysql
NAME: mysql1
LAST DEPLOYED: Mon Oct 28 12:47:53 2019
NAMESPACE: default
STATUS: DEPLOYED
RESOURCES:
==> v1/ConfigMap
NAME DATA AGE
mysql1-test 1 1s
==> v1/Deployment
NAME READY UP-TO-DATE AVAILABLE AGE
mysql1 0/1 1 0 1s
==> v1/PersistentVolumeClaim
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
mysql1 Pending 1s
==> v1/Pod(related)
NAME READY STATUS RESTARTS AGE
mysql1-bddc7c6bf-8qc45 0/1 Pending 0 1s
==> v1/Secret
NAME TYPE DATA AGE
mysql1 Opaque 2 1s
==> v1/Service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
mysql1 ClusterIP 10.1.171.158 <none> 3306/TCP 1s
NOTES:
MySQL can be accessed via port 3306 on the following DNS name from within your cluster:
mysql1.default.svc.cluster.local
To get your root password run:
MYSQL_ROOT_PASSWORD=$(kubectl get secret --namespace default mysql1 -o jsonpath="{.data.mysql-root-password}" | base64 --decode; echo)
To connect to your database:
1. Run an Ubuntu pod that you can use as a client:
kubectl run -i --tty ubuntu --image=ubuntu:16.04 --restart=Never -- bash -il
2. Install the mysql client:
$ apt-get update && apt-get install mysql-client -y
3. Connect using the mysql cli, then provide your password:
$ mysql -h mysql1 -p
To connect to your database directly from outside the K8s cluster:
MYSQL_HOST=127.0.0.1
MYSQL_PORT=3306
# Execute the following command to route the connection:
kubectl port-forward svc/mysql1 3306
mysql -h ${MYSQL_HOST} -P${MYSQL_PORT} -u root -p${MYSQL_ROOT_PASSWORD}
.
#1, 根据提示，获取mysql root 密码：
[root@master ~]# MYSQL_ROOT_PASSWORD=$(kubectl get secret --namespace default mysql1 -o jsonpath="{.data.mysql-root-password}" | base64 --decode; echo)
[root@master ~]# echo $MYSQL_ROOT_PASSWORD
root123456
#2, 查看k8s运行的结果：pod的由于pvc没有挂载到pv, 一直pending
[root@master ~]# kubectl get all |grep mysql1
pod/mysql1-bddc7c6bf-8qc45 0/1 Pending 0 88m
service/mysql1 ClusterIP 10.1.171.158 <none> 3306/TCP 88m
deployment.apps/mysql1 0/1 1 0 88m
replicaset.apps/mysql1-bddc7c6bf 1 1 0 88m
[root@master ~]# kubectl describe pod/mysql1-bddc7c6bf-8qc45
........
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning FailedScheduling 3m26s (x66 over 93m) default-scheduler pod has unbound immediate PersistentVolumeClaims
#3, 查看此pod相关的pv,pvc
[root@master ~]# kubectl get pv,pvc |grep mysql1
persistentvolumeclaim/mysql1 Pending 97m
[root@master ~]# kubectl edit persistentvolumeclaim/mysql1
....
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 8Gi
volumeMode: Filesystem
status:
phase: Pending
#4, 手动创建pv
[root@master helm]# cat pv1.yaml
apiVersion: v1
kind: PersistentVolume
metadata:
name: pv1-mysql
spec:
capacity:
storage: 8Gi
accessModes:
- ReadWriteOnce
# nfs:
# path: /data/nfs/helm
# server: 192.168.56.201
hostPath:
path: /tmp/helm1-mysql
type: Directory
[root@master helm]# mkdir /tmp/helm1-mysql
[root@master helm]# kubectl apply -f pv1.yaml
persistentvolume/pv1-mysql created
[root@master helm]# kubectl get pvc |grep mysql1
mysql1 Bound pv1-mysql 8Gi RWO 103m
[root@master helm]# kubectl get all |grep mysql1
pod/mysql1-bddc7c6bf-789xf 0/1 Running 0 9s
service/mysql1 ClusterIP 10.1.171.158 <none> 3306/TCP 105m
deployment.apps/mysql1 0/1 1 0 105m
replicaset.apps/mysql1-bddc7c6bf 1 1 0 105m
#查看主机上被挂载的目录
[root@master ~]# ls /tmp/helm1-mysql
auto.cnf ib_buffer_pool ibdata1 ib_logfile0 ib_logfile1 ibtmp1 mysql performance_schema sys test
#5, 修改service 类型为：NodePort, 方便访问mysql
[root@master ~]# kubectl edit service/mysql1
#type: clusterIP ---> 修改为 type: NodePort
[root@master ~]# kubectl get svc |grep mysql1
mysql1 NodePort 10.1.171.158 <none> 3306:31248/TCP 113m
....
#6, 从其他机器，远程登陆mysql
[root@aa ~]# mysql -utest -ptest -hkmaster -P31248
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 76
Server version: 5.7.14 MySQL Community Server (GPL)
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| test |
+--------------------+
2 rows in set (0.00 sec)
b, 自动分配pv
在k8s集群中先配置好nfs的自动供给, 参考之前的博客：https://blog.csdn.net/eyeofeagle/article/details/101031494
[root@master ~]# helm install --name mysql2 \
--set mysqlRootPassword=root123456,mysqlUser=test,mysqlPassword=test,mysqlDatabase=test,persistence.storageClass=managed-nfs-storage \
stable/mysql
#查看结果
[root@master ~]# helm ls
NAME REVISION UPDATED STATUS CHART APP VERSION NAMESPACE
mysql1 1 Tue Oct 22 18:03:45 2019 DEPLOYED mysql-1.4.0 5.7.27 default
mysql2 1 Mon Oct 28 12:14:37 2019 DEPLOYED mysql-1.4.0 5.7.27 default
[root@master ~]# kubectl get all |grep mysql2
pod/mysql2-86dfb558df-nm484 1/1 Running 0 7m30s
service/mysql2 ClusterIP 10.1.87.240 <none> 3306/TCP 7m34s
deployment.apps/mysql2 1/1 1 1 7m33s
replicaset.apps/mysql2-86dfb558df 1 1 1 7m30s
#修改service 类型为：NodePort, 方便访问mysql
[root@master ~]# kubectl edit service/mysql2
#type: clusterIP ---> 修改为 type: NodePort
[root@master ~]# kubectl get svc |grep mysql2
mysql2 NodePort 10.1.87.240 <none> 3306:30531/TCP 147m
#从其他机器，远程登陆mysql
[root@aa ~]# mysql -utest -ptest -hkmaster -P30531
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 130
Server version: 5.7.14 MySQL Community Server (GPL)
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| test |
+--------------------+
2 rows in set (0.01 sec)
2, helm定制安装mysql
配置k8s集群pv自动供给：https://blog.csdn.net/eyeofeagle/article/details/101031494
- 下载helm提供的charts，定制修改配置
- 配置mysql为utf8编码 --> 修改charts里面的values.yaml
- helm安装mysql：使用pv自动供给
a, helm下载mysql, 定制配置
#１，搜索mysql的charts
[root@master ~]# helm search mysql
NAME CHART VERSION APP VERSION DESCRIPTION
stable/mysql 1.4.0 5.7.27 Fast, reliable, scalable, and easy to use open-source rel...
stable/mariadb 6.12.0 10.3.18 Fast, reliable, scalable, and easy to use open-source rel...
#２，下载对应的mysql-charts
[root@master ~]# helm fetch stable/mysql
[root@master ~]# ls
mysql
[root@master ~]# ls mysql
Chart.yaml README.md templates values.yaml
#３，修改配置: 复制127-129行的配置，添加字符编码配置
[root@master ~]# vi mysql/values.yaml
127 # Custom mysql configuration files used to override default mysql settings
128 #configurationFiles: {}
129 # mysql.cnf: |-
130 #[mysqld]
131 #skip-name-resolve
132 #ssl-ca=/ssl/ca.pem
133 #ssl-cert=/ssl/server-cert.pem
134 #ssl-key=/ssl/server-key.pem
135 configurationFiles:
136 mysql.cnf: |-
137 [client]
138 default-character-set=utf8
139 [mysql]
140 default-character-set=utf8
141 [mysqld]
142 collation-server = utf8_unicode_ci
143 init-connect='SET NAMES utf8'
144 character-set-server = utf8
# ４，保存本地的charts
[root@master ~]# helm package mysql
Successfully packaged chart and saved it to: /root/mysql-1.4.0.tgz
[root@master ~]# helm repo list
NAME URL
stable https://kubernetes-charts.storage.googleapis.com
myrepo http://192.168.56.190:8879
local http://192.168.56.190:8879
[root@master ~]# helm repo update
Hang tight while we grab the latest from your chart repositories...
...Skip local chart repository
...Successfully got an update from the "myrepo" chart repository
...Successfully got an update from the "stable" chart repository
Update Complete.
[root@master ~]# helm search mysql
NAME CHART VERSION APP VERSION DESCRIPTION
myrepo/mysql 1.4.0 5.7.27 Fast, reliable, scalable, and easy to use open-source rel...
stable/mysql 1.4.0 5.7.27 Fast, reliable, scalable, and easy to use open-source rel...
......
b, helm运行定制的mysql
#１， 运行本地修改的mysql-charts
[root@master ~]# helm install myrepo/mysql \
--name mysql-utf8 --set \
mysqlRootPassword=root123456,mysqlUser=test,mysqlPassword=test,\
mysqlDatabase=test,persistence.storageClass=managed-nfs-storage
NAME: mysql-utf8
LAST DEPLOYED: Tue Oct 29 12:06:14 2019
NAMESPACE: default
STATUS: DEPLOYED
RESOURCES:
==> v1/ConfigMap
NAME DATA AGE
mysql-utf8-configuration 1 0s
mysql-utf8-test 1 0s
==> v1/Deployment
NAME READY UP-TO-DATE AVAILABLE AGE
mysql-utf8 0/1 1 0 0s
==> v1/PersistentVolumeClaim
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
mysql-utf8 Pending managed-nfs-storage 0s
==> v1/Pod(related)
NAME READY STATUS RESTARTS AGE
mysql-utf8-d6c84b746-mlqfp 0/1 Pending 0 0s
==> v1/Secret
NAME TYPE DATA AGE
mysql-utf8 Opaque 2 1s
==> v1/Service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
mysql-utf8 ClusterIP 10.1.162.18 <none> 3306/TCP 0s
....
#２，查看数据字符编码
[root@master ~]# kubectl exec -it $(kubectl get pod |grep mysql-utf8 |awk '{print $1}') sh
# mysql -utest -ptest
show variables like '%char%';mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 48
Server version: 5.7.14 MySQL Community Server (GPL)
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show variables like '%char%';
+--------------------------+----------------------------+
| Variable_name | Value |
+--------------------------+----------------------------+
| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |
+--------------------------+----------------------------+
8 rows in set (0.02 sec)
