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环球速读：Cluster API 检索从未如此简单

2022-08-12 18:52:55来源：云原生社区动态

​Clusterpedia 是一个 CNCF 沙箱项目，用于跨集群复杂的资源检索。


【资料图】

名字源于 Wikipedia，寓意是打造多集群的百科全书，可以与多个集群同步资源，并在与 Kubernetes OpenAPI 兼容的基础上，提供更强大的搜索功能，以帮助您快速、简便、有效地获取任何多集群资源。​

项目地址：https://github.com/clusterpedia-io/clusterpedia

0.4.0 后，Clusterpedia 提供了更加友好的接入多云平台的方式，用户在多云平台创建或者纳管集群后，便可以直接使用 kubectl 来检索这些集群内的资源。

我们在Clusterpedia 仓库[1]中维护了各个多云平台的ClusterImportPolicy[2]。非常欢迎大家提交用于对接其他多云平台的 ClusterImportPolicy。​

用户在安装 Clusterpedia 后，创建合适的 ClusterImportPolicy 即可，用户也可以根据自己的需求来创建新的 ClusterImportPolicy[3]。

Cluster API 的 ClusterImportPolicy 已经在clusterpedia#288[4]中提交，在 Cluster API 中创建集群后，可以直接使用 Clusterpedia 来对这些集群内的资源进行复杂检索。

$ kubectl get clusterNAME                PHASE         AGE    VERSIONcapi-quickstart     Provisioned   10m    v1.24.2capi-quickstart-2   Provisioned   118s   v1.24.2$ kubectl get kubeadmcontrolplaneNAME                      CLUSTER             INITIALIZED   API SERVER AVAILABLE   REPLICAS   READY   UPDATED   UNAVAILABLE   AGE   VERSIONcapi-quickstart-2-ctm9k   capi-quickstart-2   true                                 1                  1         1             10m   v1.24.2capi-quickstart-2xcsz     capi-quickstart     true                                 1                  1         1             19m   v1.24.2$ # pediacluster 会根据 cluster 资源自动创建，更新和删除$ kubectl get pediacluster -o wideNAME                        READY   VERSION   APISERVER   VALIDATED   SYNCHRORUNNING   CLUSTERHEALTHYdefault-capi-quickstart     True    v1.24.2               Validated   Running          Healthydefault-capi-quickstart-2   True    v1.24.2               Validated   Running          Healthy$ kubectl --cluster clusterpedia get noCLUSTER                     NAME                                            STATUS     ROLES           AGE   VERSIONdefault-capi-quickstart-2   capi-quickstart-2-ctm9k-g2m87                   NotReady   control-plane   12m   v1.24.2default-capi-quickstart-2   capi-quickstart-2-md-0-s8hbx-7bd44554b5-kzcb6   NotReady             11m   v1.24.2default-capi-quickstart     capi-quickstart-2xcsz-fxrrk                     NotReady   control-plane   21m   v1.24.2default-capi-quickstart     capi-quickstart-md-0-9tw2g-b8b4f46cf-gggvq      NotReady             20m   v1.24.2
01示例环境

如何快速部署一套 Cluster API And Clusterpedia 的示例环境？

预备条件安装kubectl[5]到本地环境安装Kind[6]andDocker[7]安装clusterctl[8]

Minimum kind supported version: v0.14.0

创键管理集群并部署 Cluster API

部署 Cluster API 也可以参考https://cluster-api.sigs.k8s.io/user/quick-start.html

$ cat > kind-cluster-with-extramounts.yaml <部署 Clusterpedia
$ git clone https://github.com/clusterpedia-io/clusterpedia.git && cd clusterpedia/charts$ helm install clusterpedia . \  --namespace clusterpedia-system \  --create-namespace \  --set installCRDs=true \  # --set persistenceMatchNode={{ LOCAL_PV_NODE }}  --set persistenceMatchNode=capi-sample-control-plane
clusterpedia charts 提供了 Local PV，需要创建 LOCAL PV 绑定的节点。如果不需要 charts 来创建 LOCAL PV，可以使用--set persistenceMatchNode=None.详见[9]
创建用于接入 Cluster API 的集群自动导入策略[10]
$ kubectl apply -f https://raw.githubusercontent.com/Iceber/clusterpedia/add_cluster_api_clusterimportpolicy/deploy/clusterimportpolicy/cluster_api.yaml
Clusterpedia 可以接入任何的多云管理平台，接入方式可以参考Interfacing to Multi-Cloud Platforms[11]
生成 kubectl cluster shortcut[12]，如果使用 client-go 或者 OpenAPI 来访问，可以省略该步骤。
$ curl -sfL https://raw.githubusercontent.com/clusterpedia-io/clusterpedia/main/hack/gen-clusterconfigs.sh | sh -$ # 使用 kubectl 检索多集群资源，当前 Cluster API 未创建集群，所以返回空$ kubectl --cluster clusterpedia api-resources
02使用 Cluster API创建集群
使用示例环境的 Docker Provider 来创建集群时，需要添加--flavor development。
$ clusterctl generate cluster capi-quickstart --flavor development \  --kubernetes-version v1.24.2 \  --control-plane-machine-count=1 \  --worker-machine-count=1 \  > capi-quickstart.yaml$ kubectl apply -f ./capi-quickstart.yaml
观察集群创建情况
$ kubectl get clusterNAME              PHASE         AGE   VERSIONcapi-quickstart   Provisioned   8s    v1.24.2$ kubectl get kubeadmcontrolplane -wNAME                    CLUSTER           INITIALIZED   API SERVER AVAILABLE   REPLICAS   READY   UPDATED   UNAVAILABLE   AGE   VERSIONcapi-quickstart-2xcsz   capi-quickstart   true
当 kubeadmcontrolplane 的 Initialized 为 True 后，clusterpedia 会自动同步该集群内的资源，可以使用 kubectl --cluster clusterpedia get po -A 来查看资源。
$ kubectl get pediaclusterNAME                      READY   VERSION   APISERVERdefault-capi-quickstart   True    v1.24.2$ kubectl --cluster clusterpedia get pod -ANAMESPACE     CLUSTER                   NAME                                                  READY   STATUS    RESTARTS   AGEkube-system   default-capi-quickstart   kube-apiserver-capi-quickstart-2xcsz-fxrrk            1/1     Running   0          2m32skube-system   default-capi-quickstart   kube-scheduler-capi-quickstart-2xcsz-fxrrk            1/1     Running   0          2m31skube-system   default-capi-quickstart   coredns-6d4b75cb6d-lrwj4                              0/1     Pending   0          2m20skube-system   default-capi-quickstart   kube-proxy-p8v9m                                      1/1     Running   0          2m20skube-system   default-capi-quickstart   kube-controller-manager-capi-quickstart-2xcsz-fxrrk   1/1     Running   0          2m32skube-system   default-capi-quickstart   etcd-capi-quickstart-2xcsz-fxrrk                      1/1     Running   0          2m32skube-system   default-capi-quickstart   kube-proxy-2ln2w                                      1/1     Running   0          105skube-system   default-capi-quickstart   coredns-6d4b75cb6d-2hcmz                              0/1     Pending   0          2m20s
自动创建的 pediacluster 默认的同步资源在 cluster-apiclusterimportpolicy 中设置[13]，用户也可以手动修改 pediacluster 中同步的配置，Synchronize Cluster Resources[14]。
在 Cluster API 中删除集群时，Clusterpedia 也同步删除 PeidaCluster，不会继续同步该集群。
03对多个集群的资源检索
使用上述步骤创建多个集群。
$ kubectl get clusterNAME                PHASE         AGE    VERSIONcapi-quickstart     Provisioned   10m    v1.24.2capi-quickstart-2   Provisioned   118s   v1.24.2$ kubectl get kubeadmcontrolplaneNAME                      CLUSTER             INITIALIZED   API SERVER AVAILABLE   REPLICAS   READY   UPDATED   UNAVAILABLE   AGE   VERSIONcapi-quickstart-2-ctm9k   capi-quickstart-2   true                                 1                  1         1             10m   v1.24.2capi-quickstart-2xcsz     capi-quickstart     true                                 1                  1         1             19m   v1.24.2$ # pediacluster 会根据 cluster 资源自动创建$ kubectl get pediacluster -o wideNAME                        READY   VERSION   APISERVER   VALIDATED   SYNCHRORUNNING   CLUSTERHEALTHYdefault-capi-quickstart     True    v1.24.2               Validated   Running          Healthydefault-capi-quickstart-2   True    v1.24.2               Validated   Running          Healthy$ kubectl --cluster clusterpedia get noCLUSTER                     NAME                                            STATUS     ROLES           AGE   VERSIONdefault-capi-quickstart-2   capi-quickstart-2-ctm9k-g2m87                   NotReady   control-plane   12m   v1.24.2default-capi-quickstart-2   capi-quickstart-2-md-0-s8hbx-7bd44554b5-kzcb6   NotReady             11m   v1.24.2default-capi-quickstart     capi-quickstart-2xcsz-fxrrk                     NotReady   control-plane   21m   v1.24.2default-capi-quickstart     capi-quickstart-md-0-9tw2g-b8b4f46cf-gggvq      NotReady             20m   v1.24.2
clusterpedia 提供了两种资源检索方式
兼容 Kubernetes OpenAPI 的资源检索[15]
$ kubectl --cluster clusterpedia get cm -ANAMESPACE         CLUSTER                     NAME                                 DATA   AGEkube-system       default-capi-quickstart     extension-apiserver-authentication   6      19mkube-system       default-capi-quickstart     kubeadm-config                       1      19mkube-public       default-capi-quickstart     cluster-info                         2      19mkube-system       default-capi-quickstart     kube-proxy                           2      19mkube-node-lease   default-capi-quickstart     kube-root-ca.crt                     1      19mkube-system       default-capi-quickstart-2   extension-apiserver-authentication   6      10mkube-system       default-capi-quickstart     kubelet-config                       1      19mkube-system       default-capi-quickstart     coredns                              1      19mkube-system       default-capi-quickstart     kube-root-ca.crt                     1      19mkube-public       default-capi-quickstart     kube-root-ca.crt                     1      19mkube-system       default-capi-quickstart-2   coredns                              1      10mdefault           default-capi-quickstart     kube-root-ca.crt                     1      19mkube-system       default-capi-quickstart-2   kube-proxy                           2      10mkube-system       default-capi-quickstart-2   kubeadm-config                       1      10mkube-system       default-capi-quickstart-2   kubelet-config                       1      10mkube-system       default-capi-quickstart-2   kube-root-ca.crt                     1      10mkube-node-lease   default-capi-quickstart-2   kube-root-ca.crt                     1      10mkube-public       default-capi-quickstart-2   cluster-info                         3      10mkube-public       default-capi-quickstart-2   kube-root-ca.crt                     1      10mdefault           default-capi-quickstart-2   kube-root-ca.crt                     1      10m$ # gen cluster shortcuts$ curl -sfL https://raw.githubusercontent.com/clusterpedia-io/clusterpedia/main/hack/gen-clusterconfigs.sh | sh -$ kubectl --cluster default-capi-quickstart get cm -n kube-system
Collection Resource​[16]
$ kubectl get collectionresourcesNAME            RESOURCESany             *workloads       apps.deployments,apps.daemonsets,apps.statefulsetskuberesources   .*,admission.k8s.io.*,admissionregistration.k8s.io.*,apiextensions.k8s.io.*,apps.*,authentication.k8s.io.*,authorization.k8s.io.*,autoscaling.*,batch.*,certificates.k8s.io.*,coordination.k8s.io.*,discovery.k8s.io.*,events.k8s.io.*,extensions.*,flowcontrol.apiserver.k8s.io.*,imagepolicy.k8s.io.*,internal.apiserver.k8s.io.*,networking.k8s.io.*,node.k8s.io.*,policy.*,rbac.authorization.k8s.io.*,scheduling.k8s.io.*,storage.k8s.io.*$ kubectl get collectionresources workloads
检索条件元信息过滤 (资源名称，命名空间，集群，创建时间区间)[17]
$ kubectl --cluster clusterpedia get cm -A -l \    "search.clusterpedia.io/clusters in (default-capi-quickstart,default-capi-quickstart-2),\    search.clusterpedia.io/namespaces in (kube-system,default)"NAMESPACE     CLUSTER                     NAME                                 DATA   AGEkube-system   default-capi-quickstart     extension-apiserver-authentication   6      23mkube-system   default-capi-quickstart     kubeadm-config                       1      23mkube-system   default-capi-quickstart     kube-proxy                           2      23mkube-system   default-capi-quickstart-2   extension-apiserver-authentication   6      14mkube-system   default-capi-quickstart     kubelet-config                       1      23mkube-system   default-capi-quickstart     coredns                              1      23mkube-system   default-capi-quickstart     kube-root-ca.crt                     1      23mkube-system   default-capi-quickstart-2   coredns                              1      14mdefault       default-capi-quickstart     kube-root-ca.crt                     1      23mkube-system   default-capi-quickstart-2   kube-proxy                           2      14mkube-system   default-capi-quickstart-2   kubeadm-config                       1      14mkube-system   default-capi-quickstart-2   kubelet-config                       1      14mkube-system   default-capi-quickstart-2   kube-root-ca.crt                     1      14mdefault       default-capi-quickstart-2   kube-root-ca.crt                     1      14m
模糊搜索[18]增强的 Field Selector[19]根据父辈或者祖辈 Owner 检索[20]分页和排序[21]自定义条件搜索[22]​资料链接
[1] Clusterpedia 仓库:https://github.com/clusterpedia-io/clusterpedia/tree/main/deploy/clusterimportpolicy
[2] ClusterImportPolicy:https://clusterpedia.io/zh-cn/docs/concepts/cluster-import-policy/
[3] 创建新的 ClusterImportPolicy:https://clusterpedia.io/docs/usage/interfacing-to-multi-cloud-platforms/#new-clusterimportpolicy
[4] clusterpedia#288:https://github.com/clusterpedia-io/clusterpedia/pull/288
[5] kubectl:https://kubernetes.io/docs/tasks/tools/install-kubectl/
[6] Kind:https://kind.sigs.k8s.io/
[7] Docker:https://www.docker.com/
[8] clusterctl:https://cluster-api.sigs.k8s.io/user/quick-start.html#install-clusterctl
[9] 详见:https://github.com/clusterpedia-io/clusterpedia/tree/main/charts
[10]集群自动导入策略:https://clusterpedia.io/docs/concepts/cluster-import-policy/
[11]Interfacing to Multi-Cloud Platforms:https://clusterpedia.io/docs/usage/interfacing-to-multi-cloud-platforms/
[12]生成 kubectl cluster shortcut:https://clusterpedia.io/docs/usage/access-clusterpedia/#configure-the-cluster-shortcut-for-kubectl
[13]clusterimportpolicy 中设置:https://clusterpedia.io/docs/concepts/cluster-import-policy/#pediacluster-template
[14]Synchronize Cluster Resources:https://clusterpedia.io/docs/usage/sync-resources/
[15]兼容 Kubernetes OpenAPI 的资源检索:https://clusterpedia.io/zh-cn/docs/usage/access-clusterpedia/#%E8%AE%BF%E9%97%AE-clusterpedia-%E8%B5%84%E6%BA%90
[16]Collection Resource:https://clusterpedia.io/zh-cn/docs/concepts/collection-resource/
[17]元信息过滤 (资源名称，命名空间，集群，创建时间区间):https://clusterpedia.io/docs/usage/search/#search-by-metadata
[18]模糊搜索:https://clusterpedia.io/docs/usage/search/multi-cluster/#fuzzy-search
[19]增强的 Field Selector:https://clusterpedia.io/docs/usage/search/multi-cluster/#field-selector
[20]根据父辈或者祖辈 Owner 检索:https://clusterpedia.io/docs/usage/search/multi-cluster/#search-by-parent-or-ancestor-owner
[21]分页和排序:https://clusterpedia.io/docs/usage/search/multi-cluster/#paging-and-sorting
[22]自定义条件搜索:https://clusterpedia.io/docs/us​age/search/#advanced-searchcustom-conditional-search
 
		         

关键词：         
       可以使用 
              
       命名空间 
              
       创建时间 
              
       模糊搜索

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