k8s helm 安装mysql8.0，单节点，一主两从架构
前言
环境：centos 7.9 k8s-1.22.15 dockr-20.10.9 helm3
前提条件
有k8s集群、有helm工具、有持久化存储
安装mysql
拉去helm包
[root@master ~]# helm repo add bitnami https://charts.bitnami.com/bitnami
helm search repo mysql
bitnami/mysql 9.7.0 8.0.32 MySQL is a fast, reliable, scalable, and easy t...
bitnami/phpmyadmin 10.4.5 5.2.1 phpMyAdmin is a free software tool written in P...
bitnami/mariadb 11.5.5 10.6.12 MariaDB is an open source, community-developed ...
bitnami/mariadb-galera 7.5.4 10.6.12 MariaDB Galera is a multi-primary database clus...
[root@master ~]# helm pull bitnami/mysql --version=9.7.0
[root@master ~]#ls
mysql-9.7.0.tgz
[root@master ~]# tar xf mysql-9.7.0.tgz
[root@master ~]# cd mysql
[root@master mysql]# cp values.yaml values_original.yaml
修改values.yaml文件
[root@master mysql]# grep -Ev "$^|#" values.yaml
global:
imageRegistry: ""
imagePullSecrets: []
storageClass: ""
kubeVersion: ""
nameOverride: ""
fullnameOverride: ""
namespaceOverride: ""
clusterDomain: cluster.local
commonAnnotations: {}
commonLabels: {}
extraDeploy: []
serviceBindings:
enabled: false
diagnosticMode:
enabled: false
command:
- sleep
args:
- infinity
image:
registry: docker.io
repository: bitnami/mysql
tag: 8.0.32-debian-11-r14 #安装的是mysql-8.0.32数据库
digest: ""
pullPolicy: IfNotPresent
pullSecrets: []
debug: false
architecture: replication #architecture参数表示mysql的架构，本次部署架构是主从复制，取值replication
auth: #如果部署的是单机版，取值standalone即可，下面secondary部分不用改
rootPassword: "123456" #root密码
createDatabase: true #是否创建数据库，设置true
database: "sn" #要创建的数据库名称
username: "sn" #数据库用户
password: "123456" #数据库用户密码
replicationUser: replicator #主从复制的专用用户
replicationPassword: "123456" #主从复制的专用用户密码
existingSecret: ""
usePasswordFiles: false
customPasswordFiles: {}
initdbScripts: {}
initdbScriptsConfigMap: ""
primary: #这块是主库配置，这里没有定义主库的pod副本数，是在主库模板文件里面定义的
name: primary
command: []
args: []
lifecycleHooks: {}
hostAliases: []
configuration: |-
[mysqld]
default_authentication_plugin=mysql_native_password
skip-name-resolve
explicit_defaults_for_timestamp
basedir=/opt/bitnami/mysql
plugin_dir=/opt/bitnami/mysql/lib/plugin
port=3306
socket=/opt/bitnami/mysql/tmp/mysql.sock
datadir=/bitnami/mysql/data
tmpdir=/opt/bitnami/mysql/tmp
max_allowed_packet=16M
bind-address=*
pid-file=/opt/bitnami/mysql/tmp/mysqld.pid
log-error=/opt/bitnami/mysql/logs/mysqld.log
character-set-server=UTF8
collation-server=utf8_general_ci
slow_query_log=0
slow_query_log_file=/opt/bitnami/mysql/logs/mysqld.log
long_query_time=10.0
[client]
port=3306
socket=/opt/bitnami/mysql/tmp/mysql.sock
default-character-set=UTF8
plugin_dir=/opt/bitnami/mysql/lib/plugin
[manager]
port=3306
socket=/opt/bitnami/mysql/tmp/mysql.sock
pid-file=/opt/bitnami/mysql/tmp/mysqld.pid
existingConfigmap: ""
updateStrategy:
type: RollingUpdate
podAnnotations: {}
podAffinityPreset: ""
podAntiAffinityPreset: soft
nodeAffinityPreset:
type: ""
key: ""
values: []
affinity: {}
nodeSelector: {}
tolerations: []
priorityClassName: ""
runtimeClassName: ""
schedulerName: ""
terminationGracePeriodSeconds: ""
topologySpreadConstraints: []
podManagementPolicy: ""
podSecurityContext:
enabled: true
fsGroup: 1001
containerSecurityContext:
enabled: true
runAsUser: 1001
runAsNonRoot: true
resources:
limits: {}
requests: {}
livenessProbe:
enabled: true
initialDelaySeconds: 5
periodSeconds: 10
timeoutSeconds: 1
failureThreshold: 3
successThreshold: 1
readinessProbe:
enabled: true
initialDelaySeconds: 5
periodSeconds: 10
timeoutSeconds: 1
failureThreshold: 3
successThreshold: 1
startupProbe:
enabled: true
initialDelaySeconds: 15
periodSeconds: 10
timeoutSeconds: 1
failureThreshold: 10
successThreshold: 1
customLivenessProbe: {}
customReadinessProbe: {}
customStartupProbe: {}
extraFlags: ""
extraEnvVars: []
extraEnvVarsCM: ""
extraEnvVarsSecret: ""
extraPorts: []
persistence:
enabled: true
existingClaim: ""
subPath: ""
storageClass: "nfs-storageclass" #存储类，持久化mysql主库数据
annotations: {}
accessModes:
- ReadWriteOnce
size: 1Gi #pv的大小，根据实际修改
selector: {}
extraVolumes: []
extraVolumeMounts: []
initContainers: []
sidecars: []
service:
type: ClusterIP
ports:
mysql: 3306
nodePorts:
mysql: ""
clusterIP: ""
loadBalancerIP: ""
externalTrafficPolicy: Cluster
loadBalancerSourceRanges: []
extraPorts: []
annotations: {}
sessionAffinity: None
sessionAffinityConfig: {}
headless:
annotations: {}
pdb:
create: false
minAvailable: 1
maxUnavailable: ""
podLabels: {}
secondary: #这块是从库的相关配置
name: secondary
replicaCount: 2 #从库的副本数，这里设为2，默认是1
hostAliases: []
command: []
args: []
lifecycleHooks: {}
configuration: |-
[mysqld]
default_authentication_plugin=mysql_native_password
skip-name-resolve
explicit_defaults_for_timestamp
basedir=/opt/bitnami/mysql
plugin_dir=/opt/bitnami/mysql/lib/plugin
port=3306
socket=/opt/bitnami/mysql/tmp/mysql.sock
datadir=/bitnami/mysql/data
tmpdir=/opt/bitnami/mysql/tmp
max_allowed_packet=16M
bind-address=*
pid-file=/opt/bitnami/mysql/tmp/mysqld.pid
log-error=/opt/bitnami/mysql/logs/mysqld.log
character-set-server=UTF8
collation-server=utf8_general_ci
slow_query_log=0
slow_query_log_file=/opt/bitnami/mysql/logs/mysqld.log
long_query_time=10.0
[client]
port=3306
socket=/opt/bitnami/mysql/tmp/mysql.sock
default-character-set=UTF8
plugin_dir=/opt/bitnami/mysql/lib/plugin
[manager]
port=3306
socket=/opt/bitnami/mysql/tmp/mysql.sock
pid-file=/opt/bitnami/mysql/tmp/mysqld.pid
existingConfigmap: ""
updateStrategy:
type: RollingUpdate
podAnnotations: {}
podAffinityPreset: ""
podAntiAffinityPreset: soft
nodeAffinityPreset:
type: ""
key: ""
values: []
affinity: {}
nodeSelector: {}
tolerations: []
priorityClassName: ""
runtimeClassName: ""
schedulerName: ""
terminationGracePeriodSeconds: ""
topologySpreadConstraints: []
podManagementPolicy: ""
podSecurityContext:
enabled: true
fsGroup: 1001
containerSecurityContext:
enabled: true
runAsUser: 1001
runAsNonRoot: true
resources:
limits: {}
requests: {}
livenessProbe:
enabled: true
initialDelaySeconds: 5
periodSeconds: 10
timeoutSeconds: 1
failureThreshold: 3
successThreshold: 1
readinessProbe:
enabled: true
initialDelaySeconds: 5
periodSeconds: 10
timeoutSeconds: 1
failureThreshold: 3
successThreshold: 1
startupProbe:
enabled: true
initialDelaySeconds: 15
periodSeconds: 10
timeoutSeconds: 1
failureThreshold: 15
successThreshold: 1
customLivenessProbe: {}
customReadinessProbe: {}
customStartupProbe: {}
extraFlags: ""
extraEnvVars: []
extraEnvVarsCM: ""
extraEnvVarsSecret: ""
extraPorts: []
persistence:
enabled: true
existingClaim: ""
subPath: ""
storageClass: "nfs-storageclass" #存储类，用于从库持久化数据
annotations: {}
accessModes:
- ReadWriteOnce
size: 1Gi #pv的大小，根据实际修改
selector: {}
extraVolumes: []
extraVolumeMounts: []
initContainers: []
sidecars: []
service:
type: ClusterIP
ports:
mysql: 3306
nodePorts:
mysql: ""
clusterIP: ""
loadBalancerIP: ""
externalTrafficPolicy: Cluster
loadBalancerSourceRanges: []
extraPorts: []
annotations: {}
sessionAffinity: None
sessionAffinityConfig: {}
headless:
annotations: {}
pdb:
create: false
minAvailable: 1
maxUnavailable: ""
podLabels: {}
serviceAccount:
create: true
name: ""
annotations: {}
automountServiceAccountToken: true
rbac:
create: false
rules: []
networkPolicy:
enabled: false
allowExternal: true
explicitNamespacesSelector: {}
volumePermissions:
enabled: false
image:
registry: docker.io
repository: bitnami/bitnami-shell
tag: 11-debian-11-r94
digest: ""
pullPolicy: IfNotPresent
pullSecrets: []
resources: {}
metrics:
enabled: false
image:
registry: docker.io
repository: bitnami/mysqld-exporter
tag: 0.14.0-debian-11-r96
digest: ""
pullPolicy: IfNotPresent
pullSecrets: []
containerSecurityContext:
enabled: true
runAsUser: 1001
runAsNonRoot: true
service:
type: ClusterIP
port: 9104
annotations:
prometheus.io/scrape: "true"
prometheus.io/port: "{{ .Values.metrics.service.port }}"
extraArgs:
primary: []
secondary: []
resources:
limits: {}
requests: {}
livenessProbe:
enabled: true
initialDelaySeconds: 120
periodSeconds: 10
timeoutSeconds: 1
successThreshold: 1
failureThreshold: 3
readinessProbe:
enabled: true
initialDelaySeconds: 30
periodSeconds: 10
timeoutSeconds: 1
successThreshold: 1
failureThreshold: 3
serviceMonitor:
enabled: false
namespace: ""
jobLabel: ""
interval: 30s
scrapeTimeout: ""
relabelings: []
metricRelabelings: []
selector: {}
honorLabels: false
labels: {}
annotations: {}
prometheusRule:
enabled: false
namespace: ""
additionalLabels: {}
rules: []
[root@master mysql]#
查看模板文件
[root@master mysql-主从]# tree templates/
templates/
├── extra-list.yaml
├── _helpers.tpl
├── metrics-svc.yaml
├── networkpolicy.yaml
├── NOTES.txt
├── primary #这个目录里面存放的就是主库的模板
│ ├── configmap.yaml
│ ├── initialization-configmap.yaml
│ ├── pdb.yaml
│ ├── statefulset.yaml #主库的sts模板，里面定义了replicas副本数是1
│ ├── svc-headless.yaml
│ └── svc.yaml
├── prometheusrule.yaml
├── rolebinding.yaml
├── role.yaml
├── secondary #这个目录里面存放的就是从库的模板
│ ├── configmap.yaml
│ ├── pdb.yaml
│ ├── statefulset.yaml
│ ├── svc-headless.yaml
│ └── svc.yaml
├── secrets.yaml
├── serviceaccount.yaml
└── servicemonitor.yaml
2 directories, 22 files
[root@master mysql]#
安装mysql
[root@master ~]# helm install mysql mysql/ -n default
查看mysql pod
#查看mysql的pod 正常running即可，可以登录主库创建数据，然后检查从库是否已经同步，此处略
[root@master ~]# kubectl get pod -n default