K8S如何部署Redis（单机、集群）

在今天的讨论中，我们将深入研究如何将Redis数据库迁移到云端，以便更好地利用云计算的优势提高数据管理的灵活性。

Redis(Remote Dictionary Server)是一个开源的、基于内存的数据结构存储系统，它可以用作数据库、缓存和消息代理。Redis支持多种数据结构，如字符串、列表、集合、散列等，具有高性能、低延迟、持久化等特点。

在Kubernetes(K8S)中部署Redis是一项常见的任务，因为Redis是一个高性能的键值存储数据库，非常适合用于缓存、消息队列等场景。本文将分别介绍如何在K8S集群中部署单机Redis和Redis集群。

一、部署单机Redis
步骤一：创建ConfigMap
首先，我们需要创建一个ConfigMap，用来存储和管理Redis的相关配置。

apiVersion: v1
kind: ConfigMap
metadata:
name: redis-single-config
data:
redis.conf: |
daemonize no
bind 0.0.0.0
port 6379
tcp-backlog 511
timeout 0
tcp-keepalive 300
pidfile /data/redis-server.pid
logfile /data/redis.log
loglevel notice
databases 16
always-show-logo yes
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
dir /data
slave-serve-stale-data yes
slave-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
slave-priority 100
appendonly yes
appendfilename "appendonly.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
lua-time-limit 5000
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit slave 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
aof-rewrite-incremental-fsync yes
requirepass redis#single#test
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步骤二：创建Deployment
接下来，我们需要创建一个Deployment，用来定义Redis的副本数量、镜像版本等相关信息。

apiVersion: apps/v1
kind: Deployment
metadata:
name: redis-single
spec:
replicas: 1
selector:
matchLabels:
app: redis-single
template:
metadata:
labels:
app: redis-single
spec:
initContainers:
- name: init-0
image: busybox
imagePullPolicy: IfNotPresent
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
command: [ "sysctl", "-w", "net.core.somaxconn=511" ]
securityContext:
privileged: true
- name: init-1
image: busybox
imagePullPolicy: IfNotPresent
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
command: [ "sh", "-c", "echo never > /sys/kernel/mm/transparent_hugepage/enabled" ]
securityContext:
privileged: true
containers:
- name: redis-single
image: redis:6.0.8
imagePullPolicy: IfNotPresent
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- name: redis-data
mountPath: /data
- name: redis-config
mountPath: /usr/local/etc/redis/redis.conf
subPath: redis.conf
command: [ "redis-server" ,"/usr/local/etc/redis/redis.conf" ]
env:
- name: TZ
value: "Asia/Shanghai"
volumes:
- name: timezone
hostPath:
path: /usr/share/zoneinfo/Asia/Shanghai
- name: redis-data
hostPath:
path: /var/lib/docker/redis/single
type: DirectoryOrCreate
- name: redis-config
configMap:
name: redis-single-config
items:
- key: redis.conf
path: redis.conf
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在这个文件中，我们定义了一个名为redis-single的Deployment，它使用了之前创建的ConfigMap中的配置文件，并将其挂载到容器的/usr/local/etc/redis/redis.conf路径下。此外，我们还将容器的/data目录挂载到宿主机的/var/lib/docker/redis/single目录。配置initContainers的目的是为了解决启动时出现的两个警告。

WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
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WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.
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步骤三：创建Service
然后，我们还需要创建一个Service，用来将K8S集群中运行的Redis实例暴露为可访问的服务。

apiVersion: v1
kind: Service
metadata:
name: service-redis-single
labels:
app: redis-single
spec:
selector:
app: redis-single
ports:
- name: redis-single
port: 6379
targetPort: 6379
nodePort: 30000
type: NodePort
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步骤四：验证单机Redis
首先，使用Redis可视化工具连接到刚部署的单机Redis上，验证Redis是否正常。

接下来，将副本数量调整为0,模拟Redis宕机情况。此时与Redis已断开连接。

然后，将副本数量恢复，模拟Redis宕机后重启。此时与Redis重新建立连接，功能使用正常。

小结
以上就是在K8S中部署单机Redis的相关步骤。通过这些步骤，我们成功地使用无状态的Deployment部署了一个可用的单机Redis。当然，我们也可以使用StatefulSet来部署单机Redis，两者之间的区别不大，这里就不再赘述。

二、部署6节点Redis集群
步骤一：创建ConfigMap
与单机版类似，我们需要创建一个ConfigMap来存储和管理Redis的相关配置。在这里，我们将创建6个配置文件，分别对应Redis集群中的6个节点，主要区别在于端口号的不同。

apiVersion: v1
kind: ConfigMap
metadata:
name: redis-cluster-config
data:
redis-cluster-0.conf: |
port 7111
cluster-announce-bus-port 17111
pidfile /data/redis-7111.pid
logfile /data/redis-7111.log
dbfilename dump-7111.rdb
appendfilename "appendonly-7111.aof"
cluster-config-file nodes-7111.conf
protected-mode no
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize no
supervised no
loglevel notice
databases 1
always-show-logo yes
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dir /data
masterauth redis#cluster#test
slave-serve-stale-data yes
slave-read-only yes
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
requirepass redis#cluster#test
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no
appendonly yes
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble yes
lua-time-limit 5000
cluster-enabled yes
cluster-node-timeout 15000
cluster-migration-barrier 1
cluster-require-full-coverage yes
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes
redis-cluster-1.conf: |
port 7112
cluster-announce-bus-port 17112
pidfile /data/redis-7112.pid
logfile /data/redis-7112.log
dbfilename dump-7112.rdb
appendfilename "appendonly-7112.aof"
cluster-config-file nodes-7112.conf
...
redis-cluster-2.conf: |
port 7113
cluster-announce-bus-port 17113
pidfile /data/redis-7113.pid
logfile /data/redis-7113.log
dbfilename dump-7113.rdb
appendfilename "appendonly-7113.aof"
cluster-config-file nodes-7113.conf
...
redis-cluster-3.conf: |
port 7114
cluster-announce-bus-port 17114
pidfile /data/redis-7114.pid
logfile /data/redis-7114.log
dbfilename dump-7114.rdb
appendfilename "appendonly-7114.aof"
cluster-config-file nodes-7114.conf
...
redis-cluster-4.conf: |
port 7115
cluster-announce-bus-port 17115
pidfile /data/redis-7115.pid
logfile /data/redis-7115.log
dbfilename dump-7115.rdb
appendfilename "appendonly-7115.aof"
cluster-config-file nodes-7115.conf
...
redis-cluster-5.conf: |
port 7116
cluster-announce-bus-port 17116
pidfile /data/redis-7116.pid
logfile /data/redis-7116.log
dbfilename dump-7116.rdb
appendfilename "appendonly-7116.aof"
cluster-config-file nodes-7116.conf
...
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步骤二：创建Deployment
接下来，我们需要创建6个Deployment，分别对应Redis集群中的6个节点。主要区别在于使用ConfigMap中的配置文件的不同和containers中暴露的端口不同。redis-cluster-0参考如下：

apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: redis-cluster-0
name: redis-cluster-0
spec:
progressDeadlineSeconds: 600
replicas: 1
selector:
matchLabels:
app: redis-cluster-0
strategy:
rollingUpdate:
maxSurge: 50%
maxUnavailable: 50%
type: RollingUpdate
template:
metadata:
labels:
app: redis-cluster-0
spec:
volumes:
- name: redis-data
hostPath:
path: /var/lib/docker/redis/cluster
type: DirectoryOrCreate
- name: redis-config
configMap:
name: redis-cluster-config
- name: timezone
hostPath:
path: /usr/share/zoneinfo/Asia/Shanghai
initContainers:
- name: init-0
image: busybox
imagePullPolicy: IfNotPresent
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
command: [ "sysctl", "-w", "net.core.somaxconn=511" ]
securityContext:
privileged: true
- name: init-1
image: busybox
imagePullPolicy: IfNotPresent
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
command: [ "sh", "-c", "echo never > /sys/kernel/mm/transparent_hugepage/enabled" ]
securityContext:
privileged: true
containers:
- name: redis
image: redis:6.0.8
imagePullPolicy: IfNotPresent
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- name: redis-data
mountPath: /data
- name: redis-config
mountPath: /usr/local/etc/redis/
ports:
- name: redis
containerPort: 7111
protocol: TCP
- name: election
containerPort: 17111
protocol: TCP
env:
- name: POD_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
- name: TZ
value: "Asia/Shanghai"
command: [ "redis-server" ,"/usr/local/etc/redis/redis-cluster-0.conf" ]
args:
- "--cluster-announce-ip"
- "$(POD_IP)"
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步骤三：创建Service
然后，我们还需要创建一个Service，用来将K8S集群中运行的Redis实例暴露为可访问的服务。这里同样需要创建6个Service，分别对应步骤二中的6个Deployment。

apiVersion: v1
kind: Service
metadata:
labels:
app: redis-cluster-0
name: redis-cluster-0
spec:
selector:
app: redis-cluster-0
type: NodePort
sessionAffinity: None
ports:
- name: redis-7111
port: 7111
targetPort: 7111
nodePort: 30201
- name: redis-17111
port: 17111
targetPort: 17111
nodePort: 30211
---
apiVersion: v1
kind: Service
metadata:
labels:
app: redis-cluster-1
name: redis-cluster-1
spec:
selector:
app: redis-cluster-1
type: NodePort
sessionAffinity: None
ports:
- name: redis-7112
port: 7112
targetPort: 7112
nodePort: 30202
- name: redis-17112
port: 17112
targetPort: 17112
nodePort: 30212
---
apiVersion: v1
kind: Service
metadata:
labels:
app: redis-cluster-2
name: redis-cluster-2
spec:
selector:
app: redis-cluster-2
type: NodePort
sessionAffinity: None
ports:
- name: redis-7113
port: 7113
targetPort: 7113
nodePort: 30203
- name: redis-17113
port: 17113
targetPort: 17113
nodePort: 30213
---
apiVersion: v1
kind: Service
metadata:
labels:
app: redis-cluster-3
name: redis-cluster-3
spec:
selector:
app: redis-cluster-3
type: NodePort
sessionAffinity: None
ports:
- name: redis-7114
port: 7114
targetPort: 7114
nodePort: 30204
- name: redis-17114
port: 17114
targetPort: 17114
nodePort: 30214
---
apiVersion: v1
kind: Service
metadata:
labels:
app: redis-cluster-4
name: redis-cluster-4
spec:
selector:
app: redis-cluster-4
type: NodePort
sessionAffinity: None
ports:
- name: redis-7115
port: 7115
targetPort: 7115
nodePort: 30205
- name: redis-17115
port: 17115
targetPort: 17115
nodePort: 30215
---
apiVersion: v1
kind: Service
metadata:
labels:
app: redis-cluster-5
name: redis-cluster-5
spec:
selector:
app: redis-cluster-5
type: NodePort
sessionAffinity: None
ports:
- name: redis-7116
port: 7116
targetPort: 7116
nodePort: 30206
- name: redis-17116
port: 17116
targetPort: 17116
nodePort: 30216

kubectl get pods -o wide
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执行以下命令创建Redis集群：

kubectl exec -it redis-cluster-0-65cb5487d-kn86p -- redis-cli -a redis#cluster#test --cluster create --cluster-replicas 1 109.233.87.199:7111 109.233.87.203:7112 109.233.87.198:7113 109.233.87.197:7114 109.233.87.205:7115 109.233.87.207:7116
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返回类似以下信息表示初始化成功。

[OK] All nodes agree about slots configuration.
>>> Check for open slots...
>>> Check slots coverage...
[OK] All 16384 slots covered.
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步骤五：验证Redis集群
最后，我们可以使用redis-cli工具来验证redis集群是否正常工作。首先，进入任意一个pod内，这里以redis-cluster-0为例：

kubectl exec -it redis-cluster-0-65cb5487d-kn86p -- /bin/bash
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然后，使用以下命令连接到redis集群：

redis-cli -a redis#cluster#test -c -h <HOST_IP> -p 30201
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在redis-cli中，可以执行各种redis命令来测试集群的功能。

小结
在K8S中部署Redis集群的相关步骤已经介绍完毕。通过这些步骤，我们成功地使用无状态的Deployment部署了一个可用的Redis集群。当然，我们还可以使用StatefulSet来部署Redis集群，两者之间的区别不大，相关配置文件参考详见附录。

附录1：StatefulSet方式部署Redis集群(暴露1个端口)
apiVersion: v1
kind: ConfigMap
metadata:
name: redis-cluster-config
data:
redis-cluster.conf: |
daemonize no
supervised no
protected-mode no
bind 0.0.0.0
port 6379
cluster-announce-bus-port 16379
cluster-enabled yes
appendonly yes
cluster-node-timeout 5000
dir /data
cluster-config-file /data/nodes.conf
requirepass redis#cluster#test
masterauth redis#cluster#test
---
apiVersion: v1
kind: Service
metadata:
name: redis-cluster-service
spec:
selector:
app: redis-cluster
clusterIP: None
ports:
- name: redis-6379
port: 6379
- name: redis-16379
port: 16379
---
apiVersion: v1
kind: Service
metadata:
name: redis-cluster-service-access
spec:
selector:
app: redis-cluster
type: NodePort
sessionAffinity: None
ports:
- name: redis-6379
port: 6379
targetPort: 6379
nodePort: 30201
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
labels:
app: redis-cluster
name: redis-cluster
spec:
serviceName: redis-cluster-service
replicas: 6
selector:
matchLabels:
app: redis-cluster
template:
metadata:
labels:
app: redis-cluster
spec:
terminationGracePeriodSeconds: 30
containers:
- name: redis
image: redis:6.0.8
imagePullPolicy: IfNotPresent
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
command: [ "redis-server", "/etc/redis/redis-cluster.conf" ]
args:
- "--cluster-announce-ip"
- "$(POD_IP)"
env:
- name: HOST_IP
valueFrom:
fieldRef:
fieldPath: status.hostIP
- name: POD_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: TZ
value: "Asia/Shanghai"
ports:
- name: redis
containerPort: 6379
protocol: TCP
- name: cluster
containerPort: 16379
protocol: TCP
volumeMounts:
- name: redis-conf
mountPath: /etc/redis
- name: pvc-data
mountPath: /data
volumes:
- name: timezone
hostPath:
path: /usr/share/zoneinfo/Asia/Shanghai
- name: redis-conf
configMap:
name: redis-cluster-config
items:
- key: redis-cluster.conf
path: redis-cluster.conf
volumeClaimTemplates:
- metadata:
name: pvc-data
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 1Gi
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附录2：StatefulSet方式部署Redis集群(暴露6个端口)
apiVersion: v1
kind: ConfigMap
metadata:
name: redis-cluster-config
data:
redis-cluster-0.conf: |
protected-mode no
port 7111
cluster-announce-bus-port 17111
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize no
supervised no
pidfile /data/redis-7111.pid
loglevel notice
logfile /data/redis-7111.log
databases 1
always-show-logo yes
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump-7111.rdb
dir /data
masterauth qxb#redis#cluster#test
slave-serve-stale-data yes
slave-read-only yes
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
requirepass qxb#redis#cluster#test
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no
appendonly yes
appendfilename "appendonly-7111.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble yes
lua-time-limit 5000
cluster-enabled yes
cluster-config-file nodes-7111.conf
cluster-node-timeout 15000
cluster-migration-barrier 1
cluster-require-full-coverage yes
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes
redis-cluster-1.conf: |
protected-mode no
port 7112
cluster-announce-bus-port 17112
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize no
supervised no
pidfile /data/redis-7112.pid
loglevel notice
logfile /data/redis-7112.log
databases 1
always-show-logo yes
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump-7112.rdb
dir /data
masterauth qxb#redis#cluster#test
slave-serve-stale-data yes
slave-read-only yes
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
requirepass qxb#redis#cluster#test
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no
appendonly yes
appendfilename "appendonly-7112.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble yes
lua-time-limit 5000
cluster-enabled yes
cluster-config-file nodes-7112.conf
cluster-node-timeout 15000
cluster-migration-barrier 1
cluster-require-full-coverage yes
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes
redis-cluster-2.conf: |
protected-mode no
port 7113
cluster-announce-bus-port 17113
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize no
supervised no
pidfile /data/redis-7113.pid
loglevel notice
logfile /data/redis-7113.log
databases 1
always-show-logo yes
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump-7113.rdb
dir /data
masterauth qxb#redis#cluster#test
slave-serve-stale-data yes
slave-read-only yes
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
requirepass qxb#redis#cluster#test
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no
appendonly yes
appendfilename "appendonly-7113.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble yes
lua-time-limit 5000
cluster-enabled yes
cluster-config-file nodes-7113.conf
cluster-node-timeout 15000
cluster-migration-barrier 1
cluster-require-full-coverage yes
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes
redis-cluster-3.conf: |
protected-mode no
port 7114
cluster-announce-bus-port 17114
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize no
supervised no
pidfile /data/redis-7114.pid
loglevel notice
logfile /data/redis-7114.log
databases 1
always-show-logo yes
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump-7114.rdb
dir /data
masterauth qxb#redis#cluster#test
slave-serve-stale-data yes
slave-read-only yes
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
requirepass qxb#redis#cluster#test
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no
appendonly yes
appendfilename "appendonly-7114.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble yes
lua-time-limit 5000
cluster-enabled yes
cluster-config-file nodes-7114.conf
cluster-node-timeout 15000
cluster-migration-barrier 1
cluster-require-full-coverage yes
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes
redis-cluster-4.conf: |
protected-mode no
port 7115
cluster-announce-bus-port 17115
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize no
supervised no
pidfile /data/redis-7115.pid
loglevel notice
logfile /data/redis-7115.log
databases 1
always-show-logo yes
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump-7115.rdb
dir /data
masterauth qxb#redis#cluster#test
slave-serve-stale-data yes
slave-read-only yes
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
requirepass qxb#redis#cluster#test
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no
appendonly yes
appendfilename "appendonly-7115.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble yes
lua-time-limit 5000
cluster-enabled yes
cluster-config-file nodes-7115.conf
cluster-node-timeout 15000
cluster-migration-barrier 1
cluster-require-full-coverage yes
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes
redis-cluster-5.conf: |
protected-mode no
port 7116
cluster-announce-bus-port 17116
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize no
supervised no
pidfile /data/redis-7116.pid
loglevel notice
logfile /data/redis-7116.log
databases 1
always-show-logo yes
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump-7116.rdb
dir /data
masterauth qxb#redis#cluster#test
slave-serve-stale-data yes
slave-read-only yes
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
requirepass qxb#redis#cluster#test
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no
appendonly yes
appendfilename "appendonly-7116.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble yes
lua-time-limit 5000
cluster-enabled yes
cluster-config-file nodes-7116.conf
cluster-node-timeout 15000
cluster-migration-barrier 1
cluster-require-full-coverage yes
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes
---
apiVersion: v1
kind: Service
metadata:
name: redis-cluster-0
spec:
selector:
statefulset.kubernetes.io/pod-name: redis-cluster-0
type: NodePort
sessionAffinity: None
ports:
- name: redis-30201
port: 7111
targetPort: 7111
nodePort: 30201
- name: redis-30211
port: 17111
targetPort: 17111
nodePort: 30211
---
apiVersion: v1
kind: Service
metadata:
name: redis-cluster-1
spec:
selector:
statefulset.kubernetes.io/pod-name: redis-cluster-1
type: NodePort
sessionAffinity: None
ports:
- name: redis-30202
port: 7112
targetPort: 7112
nodePort: 30202
- name: redis-30212
port: 17112
targetPort: 17112
nodePort: 30212
---
apiVersion: v1
kind: Service
metadata:
name: redis-cluster-2
spec:
selector:
statefulset.kubernetes.io/pod-name: redis-cluster-2
type: NodePort
sessionAffinity: None
ports:
- name: redis-30203
port: 7113
targetPort: 7113
nodePort: 30203
- name: redis-30213
port: 17113
targetPort: 17113
nodePort: 30213
---
apiVersion: v1
kind: Service
metadata:
name: redis-cluster-3
spec:
selector:
statefulset.kubernetes.io/pod-name: redis-cluster-3
type: NodePort
sessionAffinity: None
ports:
- name: redis-30204
port: 7114
targetPort: 7114
nodePort: 30204
- name: redis-30214
port: 17114
targetPort: 17114
nodePort: 30214
---
apiVersion: v1
kind: Service
metadata:
name: redis-cluster-4
spec:
selector:
statefulset.kubernetes.io/pod-name: redis-cluster-4
type: NodePort
sessionAffinity: None
ports:
- name: redis-30205
port: 7115
targetPort: 7115
nodePort: 30205
- name: redis-30215
port: 17115
targetPort: 17115
nodePort: 30215
---
apiVersion: v1
kind: Service
metadata:
name: redis-cluster-5
spec:
selector:
statefulset.kubernetes.io/pod-name: redis-cluster-5
type: NodePort
sessionAffinity: None
ports:
- name: redis-30206
port: 7116
targetPort: 7116
nodePort: 30206
- name: redis-30216
port: 17116
targetPort: 17116
nodePort: 30216
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: redis-cluster
spec:
serviceName: redis-cluster
replicas: 6
selector:
matchLabels:
app: redis-cluster
template:
metadata:
annotations:
statefulset.kubernetes.io/pod-name: $(POD_NAME)
labels:
app: redis-cluster
spec:
volumes:
- name: redis-data
hostPath:
path: /var/lib/docker/redis/cluster
type: DirectoryOrCreate
- name: redis-config
configMap:
name: redis-cluster-config
- name: timezone
hostPath:
path: /usr/share/zoneinfo/Asia/Shanghai
initContainers:
- name: init-0
image: busybox
imagePullPolicy: IfNotPresent
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
command: [ "sysctl", "-w", "net.core.somaxconn=511" ]
securityContext:
privileged: true
- name: init-1
image: busybox
imagePullPolicy: IfNotPresent
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
command: [ "sh", "-c", "echo never > /sys/kernel/mm/transparent_hugepage/enabled" ]
securityContext:
privileged: true
containers:
- name: redis
image: redis:6.0.8
imagePullPolicy: IfNotPresent
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- name: redis-data
mountPath: /data
- name: redis-config
mountPath: /usr/local/etc/redis/
env:
- name: HOST_IP
valueFrom:
fieldRef:
fieldPath: status.hostIP
- name: POD_IP
valueFrom:
fieldRef:
fieldPath: status.podIP
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: TZ
value: "Asia/Shanghai"
command: [ "redis-server" ,"/usr/local/etc/redis/$(POD_NAME).conf" ]
args:
- --cluster-announce-ip
- $(POD_IP)

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三、Redis集群存在的问题以及解决方案
尽管我们按照步骤二已经成功部署了Redis集群，但这种方式仅适用于在K8S集群内部使用Redis。如果我们使用可视化工具连接刚部署的Redis集群，一旦发生节点切换，集群将无法正常工作。

想要解决这个问题，我们可以按照如下步骤进行修改我们的部署文件。

步骤一：设置hostNetwork
首先，在Deployment或者StatefulSet中设置hostNetwork为true，使pod与宿主机共享网络命名空间。

spec:
template:
spec:
hostNetwork: true
————————————————

版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。

原文链接：https://blog.csdn.net/muguazhi/article/details/132455056

posted @ 2024-05-23 15:19 GaoYanbing 阅读(1931) 评论(0) 收藏举报

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