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K8s复习笔记6--使用PVC存储构建Zookeeper集群搭建
1. Zookeeper集群
基于pv和pvc作为后端存储,实现zookeeper集群
2. 创建PV
创建NFS
## nfs服务器上生成目录,并配置权限 root@haproxy-1:~# mkdir /data/k8s/wework/zookeeper-datadir-{1..3} root@haproxy-1:~# cat /etc/exports # /etc/exports: the access control list for filesystems which may be exported # to NFS clients. See exports(5). # # Example for NFSv2 and NFSv3: # /srv/homes hostname1(rw,sync,no_subtree_check) hostname2(ro,sync,no_subtree_check) # # Example for NFSv4: # /srv/nfs4 gss/krb5i(rw,sync,fsid=0,crossmnt,no_subtree_check) # /srv/nfs4/homes gss/krb5i(rw,sync,no_subtree_check) # /data/k8s *(rw,sync,no_root_squash) /data/k8s/wework/images *(rw,sync,no_root_squash) /data/k8s/wework/zookeeper-datadir-1 *(rw,sync,no_root_squash) /data/k8s/wework/zookeeper-datadir-2 *(rw,sync,no_root_squash) /data/k8s/wework/zookeeper-datadir-3 *(rw,sync,no_root_squash) root@haproxy-1:~# exportfs -rva ## 客户端查看是否有nfs权限 root@k8s-master-01:~# showmount -e 192.168.31.109 Export list for 192.168.31.109: /data/k8s/wework/zookeeper-datadir-3 * /data/k8s/wework/zookeeper-datadir-2 * /data/k8s/wework/zookeeper-datadir-1 * /data/k8s/wework/images * /data/k8s *- 1
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zookeeper-persistentvolume.yaml
--- apiVersion: v1 kind: PersistentVolume metadata: name: zookeeper-datadir-pv-1 spec: capacity: storage: 20Gi accessModes: - ReadWriteOnce nfs: server: 192.168.31.109 path: /data/k8s/wework/zookeeper-datadir-1 --- apiVersion: v1 kind: PersistentVolume metadata: name: zookeeper-datadir-pv-2 spec: capacity: storage: 20Gi accessModes: - ReadWriteOnce nfs: server: 192.168.31.109 path: /data/k8s/wework/zookeeper-datadir-2 --- apiVersion: v1 kind: PersistentVolume metadata: name: zookeeper-datadir-pv-3 spec: capacity: storage: 20Gi accessModes: - ReadWriteOnce nfs: server: 192.168.31.109 path: /data/k8s/wework/zookeeper-datadir-3- 1
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创建pv
root@k8s-master-01:/opt/k8s-data/yaml/wework/zookeeper/pv# kubectl apply -f zookeeper-persistentvolume.yaml persistentvolume/zookeeper-datadir-pv-1 created persistentvolume/zookeeper-datadir-pv-2 created persistentvolume/zookeeper-datadir-pv-3 created root@k8s-master-01:/opt/k8s-data/yaml/wework/zookeeper/pv# kubectl get pv NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE test 1Gi RWX Retain Available nfs 56d zookeeper-datadir-pv-1 20Gi RWO Retain Available 10s zookeeper-datadir-pv-2 20Gi RWO Retain Available 10s zookeeper-datadir-pv-3 20Gi RWO Retain Available 10s- 1
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3. 创建PVC
zookeeper-persistentvolumeclaim.yaml
pvc只能小于或等于pv--- apiVersion: v1 kind: PersistentVolumeClaim metadata: name: zookeeper-datadir-pvc-1 namespace: wework spec: accessModes: - ReadWriteOnce volumeName: zookeeper-datadir-pv-1 resources: requests: storage: 10Gi --- apiVersion: v1 kind: PersistentVolumeClaim metadata: name: zookeeper-datadir-pvc-2 namespace: wework spec: accessModes: - ReadWriteOnce volumeName: zookeeper-datadir-pv-2 resources: requests: storage: 10Gi --- apiVersion: v1 kind: PersistentVolumeClaim metadata: name: zookeeper-datadir-pvc-3 namespace: wework spec: accessModes: - ReadWriteOnce volumeName: zookeeper-datadir-pv-3 resources: requests: storage: 10Gi- 1
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创建pvc,pvc属于某个namespace
root@k8s-master-01:/opt/k8s-data/yaml/wework/zookeeper/pv# kubectl apply -f zookeeper-persistentvolumeclaim.yaml persistentvolumeclaim/zookeeper-datadir-pvc-1 created persistentvolumeclaim/zookeeper-datadir-pvc-2 created persistentvolumeclaim/zookeeper-datadir-pvc-3 created root@k8s-master-01:/opt/k8s-data/yaml/wework/zookeeper/pv# kubectl get pvc -n wework NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE zookeeper-datadir-pvc-1 Bound zookeeper-datadir-pv-1 20Gi RWO 8s zookeeper-datadir-pvc-2 Bound zookeeper-datadir-pv-2 20Gi RWO 8s zookeeper-datadir-pvc-3 Bound zookeeper-datadir-pv-3 20Gi RWO 8s- 1
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4. Zookeeper 镜像构建
获取基础镜像
docker pull elevy/slim_java:8 docker tag elevy/slim_java:8 harbor.intra.com/baseimages/slim_java:8 docker push harbor.intra.com/baseimages/slim_java:8- 1
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Zookeeper 的Dockerfile
数据文件: /zookeeper/data
预写日志: /zookeeper/wal
运行日志: /zookeeper/logFROM harbor.intra.com/baseimages/slim_java:8 ENV ZK_VERSION 3.4.14 ADD repositories /etc/apk/repositories # Download Zookeeper COPY zookeeper-3.4.14.tar.gz /tmp/zk.tgz COPY zookeeper-3.4.14.tar.gz.asc /tmp/zk.tgz.asc COPY KEYS /tmp/KEYS RUN apk add --no-cache --virtual .build-deps \ ca-certificates \ gnupg \ tar \ wget && \ # # Install dependencies apk add --no-cache \ bash && \ # # # Verify the signature export GNUPGHOME="$(mktemp -d)" && \ gpg -q --batch --import /tmp/KEYS && \ gpg -q --batch --no-auto-key-retrieve --verify /tmp/zk.tgz.asc /tmp/zk.tgz && \ # # Set up directories # mkdir -p /zookeeper/data /zookeeper/wal /zookeeper/log && \ # # Install tar -x -C /zookeeper --strip-components=1 --no-same-owner -f /tmp/zk.tgz && \ # # Slim down cd /zookeeper && \ cp dist-maven/zookeeper-${ZK_VERSION}.jar . && \ rm -rf \ *.txt \ *.xml \ bin/README.txt \ bin/*.cmd \ conf/* \ contrib \ dist-maven \ docs \ lib/*.txt \ lib/cobertura \ lib/jdiff \ recipes \ src \ zookeeper-*.asc \ zookeeper-*.md5 \ zookeeper-*.sha1 && \ apk del .build-deps && \ rm -rf /tmp/* "$GNUPGHOME" COPY conf /zookeeper/conf/ COPY bin/zkReady.sh /zookeeper/bin/ COPY entrypoint.sh / ENV PATH=/zookeeper/bin:${PATH} \ ZOO_LOG_DIR=/zookeeper/log \ ZOO_LOG4J_PROP="INFO, CONSOLE, ROLLINGFILE" \ JMXPORT=9010 ENTRYPOINT [ "/entrypoint.sh" ] CMD [ "zkServer.sh", "start-foreground" ] EXPOSE 2181 2888 3888 9010- 1
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build
#!/bin/bash TAG=$1 docker build -t harbor.intra.com/wework/zookeeper:${TAG} . sleep 1 docker push harbor.intra.com/wework/zookeeper:${TAG}- 1
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构建zookeeper镜像并上传harbor
root@k8s-master-01:/opt/k8s-data/dockerfile/web/wework/zookeeper# ./build-command.sh v3.4.14 Successfully built 5ae04b2d185f Successfully tagged harbor.intra.com/wework/zookeeper:v3.4.14 The push refers to repository [harbor.intra.com/wework/zookeeper] 0b68dce37282: Pushed 1eb2dfcd3952: Layer already exists 6151f3742918: Layer already exists bc80b73c0131: Layer already exists 4a6aa019c220: Layer already exists d7946f8d3eee: Layer already exists ffc9bf08c9aa: Layer already exists 6903db7df6a5: Layer already exists e053edd72ca6: Layer already exists aba783efb1a4: Layer already exists 5bef08742407: Layer already exists v3.4.14: digest: sha256:9d751752e075839c36f48787c337cbfbe5de7aeca60bbf3f81f26b00705e3de3 size: 2621 root@k8s-master-01:/opt/k8s-data/dockerfile/web/wework/zookeeper# docker images REPOSITORY TAG IMAGE ID CREATED SIZE harbor.intra.com/wework/zookeeper v3.4.14 5ae04b2d185f About a minute ago 183MB- 1
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测试镜像是否可以正常使用,确保zookeeper服务可以监听在2181端口
root@k8s-master-01:/opt/k8s-data/dockerfile/web/wework/zookeeper# docker run -it --rm harbor.intra.com/wework/zookeeper:v3.4.14 ZooKeeper JMX enabled by default ZooKeeper remote JMX Port set to 9010 ZooKeeper remote JMX authenticate set to false ZooKeeper remote JMX ssl set to false ZooKeeper remote JMX log4j set to true Using config: /zookeeper/bin/../conf/zoo.cfg 2022-08-10 01:57:43,154 [myid:] - INFO [main:QuorumPeerConfig@136] - Reading configuration from: /zookeeper/bin/../conf/zoo.cfg 2022-08-10 01:57:43,158 [myid:] - INFO [main:DatadirCleanupManager@78] - autopurge.snapRetainCount set to 3 2022-08-10 01:57:43,158 [myid:] - INFO [main:DatadirCleanupManager@79] - autopurge.purgeInterval set to 1 2022-08-10 01:57:43,162 [myid:] - WARN [main:QuorumPeerMain@116] - Either no config or no quorum defined in config, running in standalone mode 2022-08-10 01:57:43,163 [myid:] - INFO [PurgeTask:DatadirCleanupManager$PurgeTask@138] - Purge task started. 2022-08-10 01:57:43,165 [myid:] - INFO [main:QuorumPeerConfig@136] - Reading configuration from: /zookeeper/bin/../conf/zoo.cfg 2022-08-10 01:57:43,166 [myid:] - INFO [main:ZooKeeperServerMain@98] - Starting server 2022-08-10 01:57:43,171 [myid:] - INFO [main:Environment@100] - Server environment:zookeeper.version=3.4.14-4c25d480e66aadd371de8bd2fd8da255ac140bcf, built on 03/06/2019 16:18 GMT 2022-08-10 01:57:43,171 [myid:] - INFO [main:Environment@100] - Server environment:host.name=6b10cd66d66d 2022-08-10 01:57:43,172 [myid:] - INFO [main:Environment@100] - Server environment:java.version=1.8.0_144 2022-08-10 01:57:43,172 [myid:] - INFO [main:Environment@100] - Server environment:java.vendor=Oracle Corporation 2022-08-10 01:57:43,172 [myid:] - INFO [main:Environment@100] - Server environment:java.home=/usr/lib/jvm/java-8-oracle 2022-08-10 01:57:43,173 [myid:] - INFO [main:Environment@100] - Server environment:java.class.path=/zookeeper/bin/../zookeeper-server/target/classes:/zookeeper/bin/../build/classes:/zookeeper/bin/../zookeeper-server/target/lib/*.jar:/zookeeper/bin/../build/lib/*.jar:/zookeeper/bin/../lib/slf4j-log4j12-1.7.25.jar:/zookeeper/bin/../lib/slf4j-api-1.7.25.jar:/zookeeper/bin/../lib/netty-3.10.6.Final.jar:/zookeeper/bin/../lib/log4j-1.2.17.jar:/zookeeper/bin/../lib/jline-0.9.94.jar:/zookeeper/bin/../lib/audience-annotations-0.5.0.jar:/zookeeper/bin/../zookeeper-3.4.14.jar:/zookeeper/bin/../zookeeper-server/src/main/resources/lib/*.jar:/zookeeper/bin/../conf: 2022-08-10 01:57:43,173 [myid:] - INFO [main:Environment@100] - Server environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib 2022-08-10 01:57:43,173 [myid:] - INFO [main:Environment@100] - Server environment:java.io.tmpdir=/tmp 2022-08-10 01:57:43,174 [myid:] - INFO [main:Environment@100] - Server environment:java.compiler=<NA> 2022-08-10 01:57:43,174 [myid:] - INFO [main:Environment@100] - Server environment:os.name=Linux 2022-08-10 01:57:43,175 [myid:] - INFO [main:Environment@100] - Server environment:os.arch=amd64 2022-08-10 01:57:43,175 [myid:] - INFO [main:Environment@100] - Server environment:os.version=4.15.0-189-generic 2022-08-10 01:57:43,175 [myid:] - INFO [main:Environment@100] - Server environment:user.name=root 2022-08-10 01:57:43,176 [myid:] - INFO [main:Environment@100] - Server environment:user.home=/root 2022-08-10 01:57:43,176 [myid:] - INFO [main:Environment@100] - Server environment:user.dir=/zookeeper 2022-08-10 01:57:43,182 [myid:] - INFO [main:ZooKeeperServer@836] - tickTime set to 2000 2022-08-10 01:57:43,183 [myid:] - INFO [main:ZooKeeperServer@845] - minSessionTimeout set to -1 2022-08-10 01:57:43,183 [myid:] - INFO [main:ZooKeeperServer@854] - maxSessionTimeout set to -1 2022-08-10 01:57:43,185 [myid:] - INFO [PurgeTask:DatadirCleanupManager$PurgeTask@144] - Purge task completed. 2022-08-10 01:57:43,189 [myid:] - INFO [main:ServerCnxnFactory@117] - Using org.apache.zookeeper.server.NIOServerCnxnFactory as server connection factory 2022-08-10 01:57:43,193 [myid:] - INFO [main:NIOServerCnxnFactory@89] - binding to port 0.0.0.0/0.0.0.0:2181- 1
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5. Zookeeper yaml
zookeeper.yaml
apiVersion: v1 kind: Service metadata: name: zookeeper namespace: wework spec: ports: - name: client port: 2181 selector: app: zookeeper --- apiVersion: v1 kind: Service metadata: name: zookeeper1 namespace: wework spec: type: NodePort ports: - name: client port: 2181 nodePort: 32181 - name: followers port: 2888 - name: election port: 3888 selector: app: zookeeper server-id: "1" --- apiVersion: v1 kind: Service metadata: name: zookeeper2 namespace: wework spec: type: NodePort ports: - name: client port: 2181 nodePort: 32182 - name: followers port: 2888 - name: election port: 3888 selector: app: zookeeper server-id: "2" --- apiVersion: v1 kind: Service metadata: name: zookeeper3 namespace: wework spec: type: NodePort ports: - name: client port: 2181 nodePort: 32183 - name: followers port: 2888 - name: election port: 3888 selector: app: zookeeper server-id: "3" --- kind: Deployment apiVersion: apps/v1 metadata: name: zookeeper1 namespace: wework spec: replicas: 1 selector: matchLabels: app: zookeeper template: metadata: labels: app: zookeeper server-id: "1" spec: volumes: - name: data emptyDir: {} - name: wal emptyDir: medium: Memory containers: - name: server image: harbor.intra.com/wework/zookeeper:v3.4.14 imagePullPolicy: Always env: - name: MYID value: "1" - name: SERVERS value: "zookeeper1,zookeeper2,zookeeper3" - name: JVMFLAGS value: "-Xmx2G" ports: - containerPort: 2181 - containerPort: 2888 - containerPort: 3888 volumeMounts: - mountPath: "/zookeeper/data" name: zookeeper-datadir-pvc-1 volumes: - name: zookeeper-datadir-pvc-1 persistentVolumeClaim: claimName: zookeeper-datadir-pvc-1 --- kind: Deployment apiVersion: apps/v1 metadata: name: zookeeper2 namespace: wework spec: replicas: 1 selector: matchLabels: app: zookeeper template: metadata: labels: app: zookeeper server-id: "2" spec: volumes: - name: data emptyDir: {} - name: wal emptyDir: medium: Memory containers: - name: server image: harbor.intra.com/wework/zookeeper:v3.4.14 imagePullPolicy: Always env: - name: MYID value: "2" - name: SERVERS value: "zookeeper1,zookeeper2,zookeeper3" - name: JVMFLAGS value: "-Xmx2G" ports: - containerPort: 2181 - containerPort: 2888 - containerPort: 3888 volumeMounts: - mountPath: "/zookeeper/data" name: zookeeper-datadir-pvc-2 volumes: - name: zookeeper-datadir-pvc-2 persistentVolumeClaim: claimName: zookeeper-datadir-pvc-2 --- kind: Deployment apiVersion: apps/v1 metadata: name: zookeeper3 namespace: wework spec: replicas: 1 selector: matchLabels: app: zookeeper template: metadata: labels: app: zookeeper server-id: "3" spec: volumes: - name: data emptyDir: {} - name: wal emptyDir: medium: Memory containers: - name: server image: harbor.intra.com/wework/zookeeper:v3.4.14 imagePullPolicy: Always env: - name: MYID value: "3" - name: SERVERS value: "zookeeper1,zookeeper2,zookeeper3" - name: JVMFLAGS value: "-Xmx2G" ports: - containerPort: 2181 - containerPort: 2888 - containerPort: 3888 volumeMounts: - mountPath: "/zookeeper/data" name: zookeeper-datadir-pvc-3 volumes: - name: zookeeper-datadir-pvc-3 persistentVolumeClaim: claimName: zookeeper-datadir-pvc-3- 1
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将zookeeper部署到k8s
root@k8s-master-01:/opt/k8s-data/yaml/wework/zookeeper# kubectl apply -f zookeeper.yaml service/zookeeper created service/zookeeper1 created service/zookeeper2 created service/zookeeper3 created deployment.apps/zookeeper1 created deployment.apps/zookeeper2 created deployment.apps/zookeeper3 created root@k8s-master-01:/opt/k8s-data/yaml/wework/zookeeper# kubectl get pods -n wework NAME READY STATUS RESTARTS AGE wework-nginx-deployment-cdbb4945f-7xgx5 1/1 Running 0 92m wework-tomcat-app1-deployment-65d8d46957-s4666 1/1 Running 0 92m zookeeper1-699d46468c-8jq4x 1/1 Running 0 4s zookeeper2-7cc484778-gj45x 1/1 Running 0 4s zookeeper3-cdf484f7c-jh6hz 1/1 Running 0 4s root@k8s-master-01:/opt/k8s-data/yaml/wework/zookeeper# kubectl get pvc -n wework NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE zookeeper-datadir-pvc-1 Bound zookeeper-datadir-pv-1 20Gi RWO 12h zookeeper-datadir-pvc-2 Bound zookeeper-datadir-pv-2 20Gi RWO 12h zookeeper-datadir-pvc-3 Bound zookeeper-datadir-pv-3 20Gi RWO 12h root@k8s-master-01:/opt/k8s-data/yaml/wework/zookeeper# kubectl get svc -n wework NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE wework-nginx-service NodePort 10.200.89.252 <none> 80:30090/TCP,443:30091/TCP 45h wework-tomcat-app1-service ClusterIP 10.200.21.158 <none> 80/TCP 26h zookeeper ClusterIP 10.200.117.19 <none> 2181/TCP 41m zookeeper1 NodePort 10.200.167.230 <none> 2181:32181/TCP,2888:31774/TCP,3888:56670/TCP 41m zookeeper2 NodePort 10.200.36.129 <none> 2181:32182/TCP,2888:46321/TCP,3888:30984/TCP 41m zookeeper3 NodePort 10.200.190.129 <none> 2181:32183/TCP,2888:61447/TCP,3888:51393/TCP 41m- 1
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此时zookeeper的数据已经通过pv写入了nfs
root@haproxy-1:~# ls /data/k8s/wework/zookeeper-datadir-1 myid version-2 root@haproxy-1:~# ls /data/k8s/wework/zookeeper-datadir-2 myid version-2 root@haproxy-1:~# ls /data/k8s/wework/zookeeper-datadir-3 myid version-2 root@haproxy-1:~# cat /data/k8s/wework/zookeeper-datadir-1/myid 1 root@haproxy-1:~# cat /data/k8s/wework/zookeeper-datadir-2/myid 2 root@haproxy-1:~# cat /data/k8s/wework/zookeeper-datadir-3/myid 3 root@haproxy-1:~# ls -l /data/k8s/wework/zookeeper-datadir-1/version-2/ total 8 -rw-r--r-- 1 root root 1 Aug 10 10:24 acceptedEpoch -rw-r--r-- 1 root root 1 Aug 10 10:24 currentEpoch root@haproxy-1:~# ls -l /data/k8s/wework/zookeeper-datadir-2/version-2/ total 12 -rw-r--r-- 1 root root 1 Aug 10 10:24 acceptedEpoch -rw-r--r-- 1 root root 1 Aug 10 10:24 currentEpoch -rw-r--r-- 1 root root 296 Aug 10 10:24 snapshot.100000000 root@haproxy-1:~# ls -l /data/k8s/wework/zookeeper-datadir-3/version-2/ total 8 -rw-r--r-- 1 root root 1 Aug 10 10:24 acceptedEpoch -rw-r--r-- 1 root root 1 Aug 10 10:24 currentEpoch- 1
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登录控制台查看zookeeper状态
bash-4.3# zkServer.sh status ZooKeeper JMX enabled by default ZooKeeper remote JMX Port set to 9010 ZooKeeper remote JMX authenticate set to false ZooKeeper remote JMX ssl set to false ZooKeeper remote JMX log4j set to true Using config: /zookeeper/bin/../conf/zoo.cfg Mode: leader bash-4.3# netstat -tulnp Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:2181 0.0.0.0:* LISTEN 1/java tcp 0 0 0.0.0.0:44677 0.0.0.0:* LISTEN 1/java tcp 0 0 0.0.0.0:2888 0.0.0.0:* LISTEN 1/java tcp 0 0 0.0.0.0:3888 0.0.0.0:* LISTEN 1/java tcp 0 0 0.0.0.0:9010 0.0.0.0:* LISTEN 1/java tcp 0 0 0.0.0.0:45529 0.0.0.0:* LISTEN 1/java- 1
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至此zookeeper配置完成
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- 原文地址：https://blog.csdn.net/qq_29974229/article/details/126263272
