Kubernetes集群實戰(zhàn) 項目5拓展訓練

任務一拓展訓練編寫使用nodeSelector調度腳本#定義控制器版本apiVersion:apps/v1#定義資源類型kind:Deployment#定義源數(shù)據(jù)metadata:name:nodeselector#定義容器模板spec:template:metadata:labels:app:httpdspec:containers:-name:httpdimage:httpdports:-name:httpcontainerPort:80#和containers字段對齊，使用nodeSelector調度到cpu=high的節(jié)點nodeSelector:cpu:high#定義匹配的labels標簽是app:httpdselector:matchLabels:app:httpd#定義生成3個Podreplicas:3運行后查看pod重啟狀態(tài)[root@masteryaml]#kubectlgetpodNAMEREADYSTATUSRESTARTSAGEnodeselector-678b44c686-77tcp0/1Pending03m43snodeselector-678b44c686-94q7k0/1Pending03m43snodeselector-678b44c686-h7cw60/1Pending03m43s結果顯示，如果調度的標記不存在，會一直處于pending錯誤狀態(tài)。任務二拓展訓練配置node1和node2不在同一拓撲域kubectllabelnodesnode1disk-type=ssdkubectllabelnodesnode2disk-type=sas配置pod軟親和性調度腳本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親和性,因此這里匹配規(guī)則寫的是Pod的標簽信息matchExpressions:-key:appoperator:Invalues:-http#調度到disk作為label關鍵字的相同拓撲域topologyKey:disk查看調度情況[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結果中發(fā)現(xiàn)，能夠正常調度和運行。任務三拓展訓練定義污點[root@masteryaml]#kubectltaintnodesnode1db=no:NoSchedule[root@masteryaml]#kubectltaintnodesnode2web=no:PreferNoSchedule編寫控制器腳本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觀察調度情況[root@masteryaml]#kubectlgetpodNAMEREADYSTATUSRESTARTSAGEtoleration-special-746bc96976-2f6qd0/1Pending02m2stoleration-special-746bc96976-4bn9p0/1Pending02m2stoleration-special-746bc96976-58qg90/1Pending02m2stoleration-special-746bc96976-644m80/1Pending02m2stolerat