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「創(chuàng)新互聯(lián)」RedisonK8s編排部署講解與實(shí)戰(zhàn)操作
一、概述
站在用戶的角度思考問(wèn)題，與客戶深入溝通，找到永川網(wǎng)站設(shè)計(jì)與永川網(wǎng)站推廣的解決方案，憑借多年的經(jīng)驗(yàn)，讓設(shè)計(jì)與互聯(lián)網(wǎng)技術(shù)結(jié)合，創(chuàng)造個(gè)性化、用戶體驗(yàn)好的作品，建站類型包括：做網(wǎng)站、成都網(wǎng)站建設(shè)、企業(yè)官網(wǎng)、英文網(wǎng)站、手機(jī)端網(wǎng)站、網(wǎng)站推廣、域名注冊(cè)、網(wǎng)站空間、企業(yè)郵箱。業(yè)務(wù)覆蓋永川地區(qū)。
REmote DIctionary Server(Redis) 是一個(gè)由 Salvatore Sanfilippo 寫的 key-value 存儲(chǔ)系統(tǒng)，是跨平臺(tái)的非關(guān)系型數(shù)據(jù)庫(kù)。
Redis有三種集群模式：主從模式，Sentinel（哨兵）模式，Cluster模式，這三種模式環(huán)境編排部署都會(huì)在本文章介紹與實(shí)戰(zhàn)操作。
二、redis 主從模式編排部署實(shí)戰(zhàn)操作
地址：https://artifacthub.io/packages/helm/bitnami/redis
1）下載chart 包
helm repo add bitnami https://charts.bitnami.com/bitnami
helm pull bitnami/redis --version 17.3.7
tar -xf redis-17.3.7.tgz
2）構(gòu)建鏡像
這里就不重新構(gòu)建鏡像了，只是把遠(yuǎn)程鏡像tag一下，推到本地harbor倉(cāng)庫(kù)加速下載鏡像。有不清楚怎么構(gòu)建鏡像的小伙伴，可以私信或者留言。
docker pull docker.io/bitnami/redis:7.0.5-debian-11-r7
# tag
docker tag docker.io/bitnami/redis:7.0.5-debian-11-r7 myharbor.com/bigdata/redis:7.0.5-debian-11-r7
# 推送鏡像到本地harbor倉(cāng)庫(kù)
docker push myharbor.com/bigdata/redis:7.0.5-debian-11-r7
3）修改yaml編排
- redis/templates/master/pv.yaml
新增pv.yaml文件，內(nèi)容如下：
{{- range .Values.master.persistence.local }}
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: {{ .name }}
labels:
name: {{ .name }}
spec:
storageClassName: {{ $.Values.master.persistence.storageClass }}
capacity:
storage: {{ $.Values.master.persistence.size }}
accessModes:
- ReadWriteOnce
local:
path: {{ .path }}
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values:
- {{ .host }}
---
{{- end }}- redis/templates/replicas/pv.yaml
新增pv.yaml文件，內(nèi)容如下：
{{- range .Values.replica.persistence.local }}
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: {{ .name }}
labels:
name: {{ .name }}
spec:
storageClassName: {{ $.Values.replica.persistence.storageClass }}
capacity:
storage: {{ $.Values.replica.persistence.size }}
accessModes:
- ReadWriteOnce
local:
path: {{ .path }}
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values:
- {{ .host }}
---
{{- end }}- redis/values.yaml
global:
redis:
password: "123456"
...
image:
registry: myharbor.com
repository: bigdata/redis
tag: 7.0.5-debian-11-r7
master:
count: 1
persistence:
enabled: true
size: 8Gi
storageClass: "local-redis-storage"
local:
- name: redis-0
host: "local-168-182-110"
path: "/opt/bigdata/servers/redis/data/data1"
replica:
replicaCount: 2
persistence:
enabled: true
size: 8Gi
storageClass: "local-redis-storage"
local:
- name: redis-1
host: "local-168-182-111"
path: "/opt/bigdata/servers/redis/data/data1"
- name: redis-2
host: "local-168-182-112"
path: "/opt/bigdata/servers/redis/data/data1"
4）開始部署
# 創(chuàng)建存儲(chǔ)目錄
mkdir /opt/bigdata/servers/redis/data/data1
# 先檢查語(yǔ)法
helm lint ./redis
# 開始安裝
helm install redis ./redis -n redis --create-namespace
NOTES
REVISION: 1
TEST SUITE: None
NOTES:
CHART NAME: redis
CHART VERSION: 17.3.7
APP VERSION: 7.0.5
** Please be patient while the chart is being deployed **
Redis? can be accessed on the following DNS names from within your cluster:
redis-master.redis.svc.cluster.local for read/write operations (port 6379)
redis-replicas.redis.svc.cluster.local for read-only operations (port 6379)
To get your password run:
export REDIS_PASSWORD=$(kubectl get secret --namespace redis redis -o jsonpath="{.data.redis-password}" | base64 -d)
To connect to your Redis? server:
1. Run a Redis? pod that you can use as a client:
kubectl run --namespace redis redis-client --restart='Never' --env REDIS_PASSWORD=$REDIS_PASSWORD --image myharbor.com/bigdata/redis:7.0.5-debian-11-r7 --command -- sleep infinity
Use the following command to attach to the pod:
kubectl exec --tty -i redis-client \
--namespace redis -- bash
2. Connect using the Redis? CLI:
REDISCLI_AUTH="$REDIS_PASSWORD" redis-cli -h redis-master
REDISCLI_AUTH="$REDIS_PASSWORD" redis-cli -h redis-replicas
To connect to your database from outside the cluster execute the following commands:
kubectl port-forward --namespace redis svc/redis-master 6379:6379 &
REDISCLI_AUTH="$REDIS_PASSWORD" redis-cli -h 127.0.0.1 -p 6379
5）測(cè)試驗(yàn)證
kubectl get pods,svc -n redis -owide
# 登錄master，可讀可寫
kubectl exec -it redis-master-0 -n redis -- redis-cli -h redis-master -a $(kubectl get secret --namespace redis redis -o jsonpath="{.data.redis-password}" | base64 -d)
# 登錄slave，只讀
kubectl exec -it redis-master-0 -n redis -- redis-cli -h redis-replicas -a $(kubectl get secret --namespace redis redis -o jsonpath="{.data.redis-password}" | base64 -d)
6）卸載
helm uninstall redis-sentinel -n redis-sentinel
# delete ns
kubectl delete ns redis-sentinel --force
# delete pv
kubectl delete pv `kubectl get pv|grep ^redis-|awk '{print $1}'` --force
rm -fr /opt/bigdata/servers/redis/data/data1/*
三、redis 哨兵模式編排部署實(shí)戰(zhàn)操作
主從模式的弊端就是不具備高可用性，當(dāng)master掛掉以后，Redis將不能再對(duì)外提供寫入操作，因此sentinel應(yīng)運(yùn)而生。
1）構(gòu)建鏡像
這里也重新構(gòu)建鏡像了，有不懂構(gòu)建鏡像的小伙伴可以在評(píng)論下方留言。這里也只是把遠(yuǎn)程的鏡像推送到本地harbor。
docker pull docker.io/bitnami/redis-sentinel:7.0.5-debian-11-r6
# tag
docker tag docker.io/bitnami/redis-sentinel:7.0.5-debian-11-r6 myharbor.com/bigdata/redis-sentinel:7.0.5-debian-11-r6
# push
docker push myharbor.com/bigdata/redis-sentinel:7.0.5-debian-11-r6
2）修改yaml編排
- redis-sentinel/values.yaml
replica:
# replica.replicaCount與sentinel.quorum值一樣
replicaCount: 3
storageClass: "local-redis-storage"
local:
- name: redis-0
host: "local-168-182-110"
path: "/opt/bigdata/servers/redis/data/data1"
- name: redis-1
host: "local-168-182-111"
path: "/opt/bigdata/servers/redis/data/data1"
- name: redis-2
host: "local-168-182-112"
path: "/opt/bigdata/servers/redis/data/data1"
sentinel:
enabled: true
image:
registry: myharbor.com
repository: bigdata/redis-sentinel
tag: 7.0.5-debian-11-r6
quorum: 3
- redis-sentinel/templates/replicas/pv.yaml
新增pv.yaml文件，內(nèi)容如下：
{{- range .Values.sentinel.persistence.local }}
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: {{ .name }}
labels:
name: {{ .name }}
spec:
storageClassName: {{ $.Values.sentinel.persistence.storageClass }}
capacity:
storage: {{ $.Values.sentinel.persistence.size }}
accessModes:
- ReadWriteOnce
local:
path: {{ .path }}
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values:
- {{ .host }}
---
{{- end }}3）開始部署
# 創(chuàng)建存儲(chǔ)目錄
mkdir -p /opt/bigdata/servers/redis/data/data1
helm install redis-sentinel ./redis-sentinel -n redis-sentinel --create-namespace
NOTES
NAME: redis-sentinel
LAST DEPLOYED: Fri Nov 4 22:42:52 2022
NAMESPACE: redis-sentinel
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
CHART NAME: redis
CHART VERSION: 17.3.7
APP VERSION: 7.0.5
** Please be patient while the chart is being deployed **
Redis? can be accessed via port 6379 on the following DNS name from within your cluster:
redis-sentinel.redis-sentinel.svc.cluster.local for read only operations
For read/write operations, first access the Redis? Sentinel cluster, which is available in port 26379 using the same domain name above.
To get your password run:
export REDIS_PASSWORD=$(kubectl get secret --namespace redis-sentinel redis-sentinel -o jsonpath="{.data.redis-password}" | base64 -d)
To connect to your Redis? server:
1. Run a Redis? pod that you can use as a client:
kubectl run --namespace redis-sentinel redis-client --restart='Never' --env REDIS_PASSWORD=$REDIS_PASSWORD --image myharbor.com/bigdata/redis:7.0.5-debian-11-r7 --command -- sleep infinity
Use the following command to attach to the pod:
kubectl exec --tty -i redis-client \
--namespace redis-sentinel -- bash
2. Connect using the Redis? CLI:
REDISCLI_AUTH="$REDIS_PASSWORD" redis-cli -h redis-sentinel -p 6379 # Read only operations
REDISCLI_AUTH="$REDIS_PASSWORD" redis-cli -h redis-sentinel -p 26379 # Sentinel access
To connect to your database from outside the cluster execute the following commands:
kubectl port-forward --namespace redis-sentinel svc/redis-sentinel 6379:6379 &
REDISCLI_AUTH="$REDIS_PASSWORD" redis-cli -h 127.0.0.1 -p 6379
查看
kubectl get pods,svc -n redis-sentinel -owide
4）模擬故障測(cè)試
# 查看
kubectl exec -it redis-sentinel-node-0 -n redis-sentinel -- redis-cli -h redis-sentinel -a $(kubectl get secret --namespace redis-sentinel redis-sentinel -o jsonpath="{.data.redis-password}" | base64 -d) info replication
模擬故障，kill master pod
kubectl delete pod redis-sentinel-node-0 -n redis-sentinel
再次查看master所在節(jié)點(diǎn)，master節(jié)點(diǎn)已經(jīng)切換到其它節(jié)點(diǎn)了。
再測(cè)試讀寫
# 登錄master節(jié)點(diǎn)
kubectl exec -it redis-sentinel-node-0 -n redis-sentinel -- redis-cli -h redis-sentinel-node-2.redis-sentinel-headless -a $(kubectl get secret --namespace redis-sentinel redis-sentinel -o jsonpath="{.data.redis-password}" | base64 -d)
# 登錄slave節(jié)點(diǎn)
kubectl exec -it redis-sentinel-node-0 -n redis-sentinel -- redis-cli -h redis-sentinel-node-0.redis-sentinel-headless -a $(kubectl get secret --namespace redis-sentinel redis-sentinel -o jsonpath="{.data.redis-password}" | base64 -d)
5）卸載
helm uninstall redis-sentinel -n redis
# delete ns
kubectl delete ns redis --force
# delete pv
kubectl delete pv `kubectl get pv|grep ^redis-|awk '{print $1}'` --force
rm -fr /opt/bigdata/servers/redis/data/data1/*
四、redis 集群模式編排部署實(shí)戰(zhàn)操作
集群模式可以說(shuō)是sentinel+主從模式的結(jié)合體，通過(guò)cluster可以實(shí)現(xiàn)主從和master重選功能，所以如果配置兩個(gè)副本三個(gè)分片的話，就需要六個(gè)Redis實(shí)例。因?yàn)镽edis的數(shù)據(jù)是根據(jù)一定規(guī)則分配到cluster的不同機(jī)器的，當(dāng)數(shù)據(jù)量過(guò)大時(shí)，可以新增機(jī)器進(jìn)行擴(kuò)容。
1）下載chart 包
helm repo add bitnami https://charts.bitnami.com/bitnami
helm pull bitnami/redis-cluster --version 8.2.7
tar -xf redis-cluster-8.2.7.tgz
2）構(gòu)建鏡像
這里就不重新構(gòu)建鏡像了，只是把遠(yuǎn)程鏡像tag一下，推到本地harbor倉(cāng)庫(kù)加速下載鏡像。有不清楚怎么構(gòu)建鏡像的小伙伴，可以私信或者留言。
docker pull docker.io/bitnami/redis-cluster:7.0.5-debian-11-r9
# tag
docker tag docker.io/bitnami/redis-cluster:7.0.5-debian-11-r9 myharbor.com/bigdata/redis-cluster:7.0.5-debian-11-r9
# 推送鏡像到本地harbor倉(cāng)庫(kù)
docker push myharbor.com/bigdata/redis-cluster:7.0.5-debian-11-r9
3）修改yaml編排
- redis-cluster/templates/pv.yaml
新增pv.yaml文件，內(nèi)容如下：
{{- range .Values.persistence.local }}
---
apiVersion: v1
kind: PersistentVolume
metadata:
name: {{ .name }}
labels:
name: {{ .name }}
spec:
storageClassName: {{ $.Values.persistence.storageClass }}
capacity:
storage: {{ $.Values.persistence.size }}
accessModes:
- ReadWriteOnce
local:
path: {{ .path }}
nodeAffinity:
required:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values:
- {{ .host }}
---
{{- end }}password: "123456"
...
image:
registry: myharbor.com
repository: bigdata/redis-cluster
tag: 7.0.5-debian-11-r9
...
persistence:
storageClass: "local-redis-cluster-storage"
local:
- name: redis-cluster-0
host: "local-168-182-110"
path: "/opt/bigdata/servers/redis-cluster/data/data1"
- name: redis-cluster-1
host: "local-168-182-110"
path: "/opt/bigdata/servers/redis-cluster/data/data2"
- name: redis-cluster-2
host: "local-168-182-110"
path: "/opt/bigdata/servers/redis-cluster/data/data3"
- name: redis-cluster-3
host: "local-168-182-111"
path: "/opt/bigdata/servers/redis-cluster/data/data1"
- name: redis-cluster-4
host: "local-168-182-111"
path: "/opt/bigdata/servers/redis-cluster/data/data2"
- name: redis-cluster-5
host: "local-168-182-111"
path: "/opt/bigdata/servers/redis-cluster/data/data3"
- name: redis-cluster-6
host: "local-168-182-112"
path: "/opt/bigdata/servers/redis-cluster/data/data1"
- name: redis-cluster-7
host: "local-168-182-112"
path: "/opt/bigdata/servers/redis-cluster/data/data2"
- name: redis-cluster-8
host: "local-168-182-112"
path: "/opt/bigdata/servers/redis-cluster/data/data3"
cluster:
init: true
# 一主兩從（三組）
nodes: 9
replicas: 2
4）開始部署
# 創(chuàng)建存儲(chǔ)目錄
mkdir -p /opt/bigdata/servers/redis-cluster/data/data{1..3}
helm install redis-cluster ./redis-cluster -n redis-cluster --create-namespace
NOTES
NOTES:
CHART NAME: redis-cluster
CHART VERSION: 8.2.7
APP VERSION: 7.0.5** Please be patient while the chart is being deployed **
To get your password run:
export REDIS_PASSWORD=$(kubectl get secret --namespace "redis-cluster" redis-cluster -o jsonpath="{.data.redis-password}" | base64 -d)
You have deployed a Redis? Cluster accessible only from within you Kubernetes Cluster.INFO: The Job to create the cluster will be created.To connect to your Redis? cluster:
1. Run a Redis? pod that you can use as a client:
kubectl run --namespace redis-cluster redis-cluster-client --rm --tty -i --restart='Never' \
--env REDIS_PASSWORD=$REDIS_PASSWORD \
--image myharbor.com/bigdata/redis-cluster:7.0.5-debian-11-r9 -- bash
2. Connect using the Redis? CLI:
redis-cli -c -h redis-cluster -a $REDIS_PASSWORD
查看
kubectl get pods,svc -n redis-cluster -owide
5）故障模擬測(cè)試
kubectl exec -it redis-cluster-0 -n redis-cluster -- redis-cli -c -h redis-cluster -a $(kubectl get secret --namespace "redis-cluster" redis-cluster -o jsnotallow="{.data.redis-password}" | base64 -d) CLUSTER INFO
kubectl exec -it redis-cluster-0 -n redis-cluster -- redis-cli -c -h redis-cluster -a $(kubectl get secret --namespace "redis-cluster" redis-cluster -o jsonpath="{.data.redis-password}" | base64 -d) CLUSTER NODES刪除其中一個(gè)master節(jié)點(diǎn)
kubectl delete pod redis-cluster-1 -n redis-cluster
# 再查看節(jié)點(diǎn)情況
kubectl exec -it redis-cluster-0 -n redis-cluster -- redis-cli -c -h redis-cluster -a $(kubectl get secret --namespace "redis-cluster" redis-cluster -o jsonpath="{.data.redis-password}" | base64 -d) CLUSTER NODES
6）卸載
helm uninstall redis-cluster -n redis-cluster
# delete ns
kubectl delete ns redis-cluster --force
# delete pv
kubectl delete pv `kubectl get pv|grep ^redis-cluster-|awk '{print $1}'` --force
rm -fr /opt/bigdata/servers/redis-cluster/data/data{1..3}/*
git地址：https://gitee.com/hadoop-bigdata/redis-on-k8s?
網(wǎng)頁(yè)名稱：「創(chuàng)新互聯(lián)」RedisonK8s編排部署講解與實(shí)戰(zhàn)操作
文章源于：http://fisionsoft.com.cn/article/dhhidos.html
