Kubernetes集群实战 项目5拓展训练

任务一拓展训练编写使用nodeSelector调度脚本#定义控制器版本apiVersion:apps/v1#定义资源类型kind:Deployment#定义源数据metadata:name:nodeselector#定义容器模板spec:template:metadata:labels:app:httpdspec:containers:-name:httpdimage:httpdports:-name:httpcontainerPort:80#和containers字段对齐，使用nodeSelector调度到cpu=high的节点nodeSelector:cpu:high#定义匹配的labels标签是app:httpdselector:matchLabels:app:httpd#定义生成3个Podreplicas:3运行后查看pod重启状态[root@masteryaml]#kubectlgetpodNAMEREADYSTATUSRESTARTSAGEnodeselector-678b44c686-77tcp0/1Pending03m43snodeselector-678b44c686-94q7k0/1Pending03m43snodeselector-678b44c686-h7cw60/1Pending03m43s结果显示，如果调度的标记不存在，会一直处于pending错误状态。任务二拓展训练配置node1和node2不在同一拓扑域kubectllabelnodesnode1disk-type=ssdkubectllabelnodesnode2disk-type=sas配置pod软亲和性调度脚本apiVersion:apps/v1kind:Deploymentmetadata:name:pod-preferlabels:app:podpreferspec:replicas:6selector:matchLabels:app:mypodtemplate:metadata:labels:app:mypodspec:containers:-name:myapp-podimage:nginx:1.8.1imagePullPolicy:IfNotPresentports:-name:httpcontainerPort:80affinity:podAffinity:preferredDuringSchedulingIgnoredDuringExecution:-weight:100podAffinityTerm:labelSelector:#由于是Pod亲和性,因此这里匹配规则写的是Pod的标签信息matchExpressions:-key:appoperator:Invalues:-http#调度到disk作为label关键字的相同拓扑域topologyKey:disk查看调度情况[root@masteryaml]#kubectlgetpodNAMEREADYSTATUSRESTARTSAGEpod-prefer-7d6f654cc8-k2d2n1/1Running0101spod-prefer-7d6f654cc8-kqfzx1/1Running0101spod-prefer-7d6f654cc8-msspw1/1Running0101spod-prefer-7d6f654cc8-r797q1/1Running0101spod-prefer-7d6f654cc8-tkm4n1/1Running0101spod-prefer-7d6f654cc8-tmccx1/1Running0101s结果中发现，能够正常调度和运行。任务三拓展训练定义污点[root@masteryaml]#kubectltaintnodesnode1db=no:NoSchedule[root@masteryaml]#kubectltaintnodesnode2web=no:PreferNoSchedule编写控制器脚本apiVersion:apps/v1kind:Deploymentmetadata:name:toleration-specialspec:template:metadata:labels:app:nginxspec:containers:-name:nginximage:nginx:1.8.1ports:-name:p1containerPort:80selector:matchLabels:app:nginxreplicas:6观察调度情况[root@masteryaml]#kubectlgetpodNAMEREADYSTATUSRESTARTSAGEtoleration-special-746bc96976-2f6qd0/1Pending02m2stoleration-special-746bc96976-4bn9p0/1Pending02m2stoleration-special-746bc96976-58qg90/1Pending02m2stoleration-special-746bc96976-644m80/1Pending02m2stolerat