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【云原生之kubernetes】在kubernetes集群下的jobs与cronjobs管理
一、jobs与cronjobs介绍
1.job介绍
jobs：job负责处理任务，即仅执行一次的任务，它保证批处理任务的一个或多个Pod成功结束。
2.cronjobs介绍
CronJob在Job上加上了时间调度，CronJob是基于调度的Job执行将会自动产生多个job，调度格式参考Linux的cron系统。
二、检查本地kubernetes集群
1.检查工作节点状态
[root@k8s-master jobs]# kubectl get nodes -owide NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME k8s-master Ready control-plane,master 18d v1.23.1 192.168.3.201 <none> CentOS Linux 7 (Core) 3.10.0-957.el7.x86_64 containerd://1.6.6 k8s-node01 Ready <none> 18d v1.23.1 192.168.3.202 <none> CentOS Linux 7 (Core) 3.10.0-957.el7.x86_64 containerd://1.6.6 k8s-node02 Ready <none> 18d v1.23.1 192.168.3.203 <none> CentOS Linux 7 (Core) 3.10.0-957.el7.x86_64 containerd://1.6.6- 1
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2.检查系统pod状态
[root@k8s-master jobs]# kubectl get pods -A -owide NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES kube-system calico-kube-controllers-7bc6547ffb-2nf66 1/1 Running 2 (91m ago) 18d 10.244.235.201 k8s-master <none> <none> kube-system calico-node-8c4pn 1/1 Running 2 (91m ago) 18d 192.168.3.202 k8s-node01 <none> <none> kube-system calico-node-f28qq 1/1 Running 2 (91m ago) 18d 192.168.3.203 k8s-node02 <none> <none> kube-system calico-node-wmc2j 1/1 Running 2 (91m ago) 18d 192.168.3.201 k8s-master <none> <none> kube-system coredns-6d8c4cb4d-6gm4x 1/1 Running 2 (91m ago) 18d 10.244.235.200 k8s-master <none> <none> kube-system coredns-6d8c4cb4d-7vxlz 1/1 Running 2 (91m ago) 18d 10.244.235.199 k8s-master <none> <none> kube-system etcd-k8s-master 1/1 Running 2 (91m ago) 18d 192.168.3.201 k8s-master <none> <none> kube-system kube-apiserver-k8s-master 1/1 Running 2 (91m ago) 18d 192.168.3.201 k8s-master <none> <none> kube-system kube-controller-manager-k8s-master 1/1 Running 2 (91m ago) 18d 192.168.3.201 k8s-master <none> <none> kube-system kube-proxy-8dfw8 1/1 Running 2 (91m ago) 18d 192.168.3.201 k8s-master <none> <none> kube-system kube-proxy-ghzrv 1/1 Running 2 (91m ago) 18d 192.168.3.203 k8s-node02 <none> <none> kube-system kube-proxy-j867z 1/1 Running 2 (91m ago) 18d 192.168.3.202 k8s-node01 <none> <none> kube-system kube-scheduler-k8s-master 1/1 Running 2 (91m ago) 18d 192.168.3.201 k8s-master <none> <none>- 1
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三、查询k8s中jobs的相关模块
1.查询查询apiVersion
[root@k8s-master jobs]# kubectl api-resources |grep job cronjobs cj batch/v1 true CronJob jobs batch/v1 true Job- 1
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2.查询jobs
[root@k8s-master jobs]# kubectl explain jobs --recursive |more KIND: Job VERSION: batch/v1 DESCRIPTION: Job represents the configuration of a single job. FIELDS: apiVersion <string> kind <string> metadata <Object> annotations <map[string]string> clusterName <string> creationTimestamp <string> deletionGracePeriodSeconds <integer> deletionTimestamp <string> finalizers <[]string> generateName <string> generation <integer> labels <map[string]string> managedFields <[]Object> apiVersion <string> fieldsType <string> fieldsV1 <map[string]> manager <string> operation <string> subresource <string> time <string> name <string> namespace <string> ownerReferences <[]Object> apiVersion <string> blockOwnerDeletion <boolean> controller <boolean> kind <string> name <string> uid <string> resourceVersion <string> selfLink <string> uid <string> spec <Object> --More--- 1
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四、k8s中使用jobs创建一次性任务
1.编辑jobs.yaml文件
[root@k8s-master jobs]# cat jobs.yaml apiVersion: batch/v1 kind: Job metadata: name: jobs-tes namespace: default spec: backoffLimit: 3 activeDeadlineSeconds: 120 #限制容器运行时间 # ttlSecondsAfterFinished: 10 #任务执行完成后，10s内会删除pod # selector: # matchLabels: # app: helloworld template: metadata: name: hellworld labels: app: helloworld spec: restartPolicy: Never containers: - name: helloworld image: busybox:1.28 command: - /bin/sh - -c - "echo 'hello the world'"- 1
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2.运行jobs
kubectl apply -f jobs.yaml- 1
3.查看jobs
[root@k8s-master jobs]# kubectl get jobs.batch jobs-tes NAME COMPLETIONS DURATION AGE jobs-tes 1/1 19s 40s- 1
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4.查看运行日志
[root@k8s-master jobs]# kubectl logs jobs-tes-ns64n hello the world- 1
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5.删除jobs
[root@k8s-master jobs]# kubectl delete jobs.batch jobs-tes job.batch "jobs-tes" deleted- 1
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五、创建cronjobs类型任务
1.编写cronjobs.yaml文件
[root@k8s-master jobs]# cat cronjobs.yaml apiVersion: batch/v1 kind: CronJob metadata: name: cronjob-test namespace: default spec: schedule: "*/1 * * * *" successfulJobsHistoryLimit: 3 #保留成功任务的历史记录次数 # startingDeadlineSeconds：150 #上一个任务在150s后没有完成，进行下一个任务；在150s内，检测任务完成，立即执行下一个任务 jobTemplate: metadata: name: helloworld spec: backoffLimit: 3 activeDeadlineSeconds: 120 #限制容器运行时间 # ttlSecondsAfterFinished: 10 #任务执行完成后，10s内会删除pod # selector: # matchLabels: # app: helloworld template: metadata: name: hellworld labels: app: helloworld spec: restartPolicy: Never containers: - name: helloworld image: busybox:1.28 command: - /bin/sh - -c - "echo 'hello life'"- 1
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2.创建cronjobs
[root@k8s-master jobs]# kubectl apply -f cronjobs.yaml cronjob.batch/cronjob-test created- 1
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3.查看cronjobs状态
[root@k8s-master jobs]# kubectl get cronjobs.batch cronjob-test NAME SCHEDULE SUSPEND ACTIVE LAST SCHEDULE AGE cronjob-test */1 * * * * False 0 38s 2m32s- 1
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4.查看任务完成状态
[root@k8s-master jobs]# kubectl get pods NAME READY STATUS RESTARTS AGE cronjob-test-27639747-9rbzx 0/1 Completed 0 2m21s cronjob-test-27639748-hldht 0/1 Completed 0 81s cronjob-test-27639749-jqbwk 0/1 Completed 0 21s- 1
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5.查看cronjobs日志
[root@k8s-master jobs]# kubectl logs cronjob-test-27639748-hldht hello life [root@k8s-master jobs]# kubectl logs cronjob-test-27639749-jqbwk hello life [root@k8s-master jobs]# kubectl logs cronjob-test-27639750-8brd4 hello life- 1
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- 原文地址：https://blog.csdn.net/jks212454/article/details/125909719
