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Cluster API 檢索從未如此簡單

作者：蔡威
開發(fā)
如何快速部署一套 Cluster API And Clusterpedia 的示例環(huán)境？

?Clusterpedia 是一個 CNCF 沙箱項目，用于跨集群復(fù)雜的資源檢索。

名字源于 Wikipedia，寓意是打造多集群的百科全書，可以與多個集群同步資源，并在與 Kubernetes OpenAPI 兼容的基礎(chǔ)上，提供更強大的搜索功能，以幫助您快速、簡便、有效地獲取任何多集群資源。?

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

0.4.0 后，Clusterpedia 提供了更加友好的接入多云平臺的方式，用戶在多云平臺創(chuàng)建或者納管集群后，便可以直接使用 kubectl 來檢索這些集群內(nèi)的資源。

我們在Clusterpedia 倉庫[1]中維護了各個多云平臺的 ClusterImportPolicy[2]。非常歡迎大家提交用于對接其他多云平臺的 ClusterImportPolicy。?

用戶在安裝 Clusterpedia 后，創(chuàng)建合適的 ClusterImportPolicy 即可，用戶也可以根據(jù)自己的需求來創(chuàng)建新的 ClusterImportPolicy[3]。

Cluster API 的 ClusterImportPolicy 已經(jīng)在 clusterpedia#288[4]中提交，在 Cluster API 中創(chuàng)建集群后，可以直接使用 Clusterpedia 來對這些集群內(nèi)的資源進行復(fù)雜檢索。

$ kubectl get cluster
NAME                PHASE         AGE    VERSION
capi-quickstart     Provisioned   10m    v1.24.2
capi-quickstart-2   Provisioned   118s   v1.24.2


$ kubectl get kubeadmcontrolplane
NAME                      CLUSTER             INITIALIZED   API SERVER AVAILABLE   REPLICAS   READY   UPDATED   UNAVAILABLE   AGE   VERSION
capi-quickstart-2-ctm9k   capi-quickstart-2   true                                 1                  1         1             10m   v1.24.2
capi-quickstart-2xcsz     capi-quickstart     true                                 1                  1         1             19m   v1.24.2


$ # pediacluster 會根據(jù) cluster 資源自動創(chuàng)建，更新和刪除
$ kubectl get pediacluster -o wide
NAME                        READY   VERSION   APISERVER   VALIDATED   SYNCHRORUNNING   CLUSTERHEALTHY
default-capi-quickstart     True    v1.24.2               Validated   Running          Healthy
default-capi-quickstart-2   True    v1.24.2               Validated   Running          Healthy


$ kubectl --cluster clusterpedia get no
CLUSTER                     NAME                                            STATUS     ROLES           AGE   VERSION
default-capi-quickstart-2   capi-quickstart-2-ctm9k-g2m87                   NotReady   control-plane   12m   v1.24.2
default-capi-quickstart-2   capi-quickstart-2-md-0-s8hbx-7bd44554b5-kzcb6   NotReady   <none>          11m   v1.24.2
default-capi-quickstart     capi-quickstart-2xcsz-fxrrk                     NotReady   control-plane   21m   v1.24.2
default-capi-quickstart     capi-quickstart-md-0-9tw2g-b8b4f46cf-gggvq      NotReady   <none>          20m   v1.24.2

01示例環(huán)境

如何快速部署一套 Cluster API And Clusterpedia 的示例環(huán)境？

預(yù)備條件

  • 安裝 kubectl[5] 到本地環(huán)境
  • 安裝 Kind[6] and Docker[7]
  • 安裝 clusterctl[8]

   Minimum kind supported version: v0.14.0

創(chuàng)鍵管理集群并部署 Cluster API

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

$ cat > kind-cluster-with-extramounts.yaml <<EOF
kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
nodes:
- role: control-plane
  extraMounts:
    - hostPath: /var/run/docker.sock
      containerPath: /var/run/docker.sock
EOF


$ kind create cluster --name capi-sample --config kind-cluster-with-extramounts.yaml


$ export CLUSTER_TOPOLOGY=true
$ clusterctl init --infrastructure docker

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，需要創(chuàng)建 LOCAL PV 綁定的節(jié)點。如果不需要 charts 來創(chuàng)建 LOCAL PV，可以使用 --set persistenceMatchNode=None.詳見[9]

創(chuàng)建用于接入 Cluster API 的集群自動導(dǎo)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臺，接入方式可以參考 Interfacing to Multi-Cloud Platforms[11]

生成 kubectl cluster shortcut[12]，如果使用 client-go 或者 OpenAPI 來訪問，可以省略該步驟。

$ curl -sfL https://raw.githubusercontent.com/clusterpedia-io/clusterpedia/main/hack/gen-clusterconfigs.sh | sh -


$ # 使用 kubectl 檢索多集群資源，當前 Cluster API 未創(chuàng)建集群，所以返回空
$ kubectl --cluster clusterpedia api-resources

02使用 Cluster API創(chuàng)建集群

使用示例環(huán)境的 Docker Provider 來創(chuàng)建集群時，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

觀察集群創(chuàng)建情況

$ kubectl get cluster
NAME              PHASE         AGE   VERSION
capi-quickstart   Provisioned   8s    v1.24.2


$ kubectl get kubeadmcontrolplane -w
NAME                    CLUSTER           INITIALIZED   API SERVER AVAILABLE   REPLICAS   READY   UPDATED   UNAVAILABLE   AGE   VERSION
capi-quickstart-2xcsz   capi-quickstart   true

當 kubeadmcontrolplane 的 Initialized 為 True 后，clusterpedia 會自動同步該集群內(nèi)的資源，可以使用 kubectl --cluster clusterpedia get po -A 來查看資源。

$ kubectl get pediacluster
NAME                      READY   VERSION   APISERVER
default-capi-quickstart   True    v1.24.2


$ kubectl --cluster clusterpedia get pod -A
NAMESPACE     CLUSTER                   NAME                                                  READY   STATUS    RESTARTS   AGE
kube-system   default-capi-quickstart   kube-apiserver-capi-quickstart-2xcsz-fxrrk            1/1     Running   0          2m32s
kube-system   default-capi-quickstart   kube-scheduler-capi-quickstart-2xcsz-fxrrk            1/1     Running   0          2m31s
kube-system   default-capi-quickstart   coredns-6d4b75cb6d-lrwj4                              0/1     Pending   0          2m20s
kube-system   default-capi-quickstart   kube-proxy-p8v9m                                      1/1     Running   0          2m20s
kube-system   default-capi-quickstart   kube-controller-manager-capi-quickstart-2xcsz-fxrrk   1/1     Running   0          2m32s
kube-system   default-capi-quickstart   etcd-capi-quickstart-2xcsz-fxrrk                      1/1     Running   0          2m32s
kube-system   default-capi-quickstart   kube-proxy-2ln2w                                      1/1     Running   0          105s
kube-system   default-capi-quickstart   coredns-6d4b75cb6d-2hcmz                              0/1     Pending   0          2m20s

自動創(chuàng)建的 pediacluster 默認的同步資源在 cluster-api clusterimportpolicy 中設(shè)置[13]，用戶也可以手動修改 pediacluster 中同步的配置， Synchronize Cluster Resources[14]。

在 Cluster API 中刪除集群時，Clusterpedia 也同步刪除 PeidaCluster，不會繼續(xù)同步該集群。

03對多個集群的資源檢索

使用上述步驟創(chuàng)建多個集群。

$ kubectl get cluster
NAME                PHASE         AGE    VERSION
capi-quickstart     Provisioned   10m    v1.24.2
capi-quickstart-2   Provisioned   118s   v1.24.2


$ kubectl get kubeadmcontrolplane
NAME                      CLUSTER             INITIALIZED   API SERVER AVAILABLE   REPLICAS   READY   UPDATED   UNAVAILABLE   AGE   VERSION
capi-quickstart-2-ctm9k   capi-quickstart-2   true                                 1                  1         1             10m   v1.24.2
capi-quickstart-2xcsz     capi-quickstart     true                                 1                  1         1             19m   v1.24.2


$ # pediacluster 會根據(jù) cluster 資源自動創(chuàng)建
$ kubectl get pediacluster -o wide
NAME                        READY   VERSION   APISERVER   VALIDATED   SYNCHRORUNNING   CLUSTERHEALTHY
default-capi-quickstart     True    v1.24.2               Validated   Running          Healthy
default-capi-quickstart-2   True    v1.24.2               Validated   Running          Healthy


$ kubectl --cluster clusterpedia get no
CLUSTER                     NAME                                            STATUS     ROLES           AGE   VERSION
default-capi-quickstart-2   capi-quickstart-2-ctm9k-g2m87                   NotReady   control-plane   12m   v1.24.2
default-capi-quickstart-2   capi-quickstart-2-md-0-s8hbx-7bd44554b5-kzcb6   NotReady   <none>          11m   v1.24.2
default-capi-quickstart     capi-quickstart-2xcsz-fxrrk                     NotReady   control-plane   21m   v1.24.2
default-capi-quickstart     capi-quickstart-md-0-9tw2g-b8b4f46cf-gggvq      NotReady   <none>          20m   v1.24.2

clusterpedia 提供了兩種資源檢索方式

兼容 Kubernetes OpenAPI 的資源檢索[15]

$ kubectl --cluster clusterpedia get cm -A
NAMESPACE         CLUSTER                     NAME                                 DATA   AGE
kube-system       default-capi-quickstart     extension-apiserver-authentication   6      19m
kube-system       default-capi-quickstart     kubeadm-config                       1      19m
kube-public       default-capi-quickstart     cluster-info                         2      19m
kube-system       default-capi-quickstart     kube-proxy                           2      19m
kube-node-lease   default-capi-quickstart     kube-root-ca.crt                     1      19m
kube-system       default-capi-quickstart-2   extension-apiserver-authentication   6      10m
kube-system       default-capi-quickstart     kubelet-config                       1      19m
kube-system       default-capi-quickstart     coredns                              1      19m
kube-system       default-capi-quickstart     kube-root-ca.crt                     1      19m
kube-public       default-capi-quickstart     kube-root-ca.crt                     1      19m
kube-system       default-capi-quickstart-2   coredns                              1      10m
default           default-capi-quickstart     kube-root-ca.crt                     1      19m
kube-system       default-capi-quickstart-2   kube-proxy                           2      10m
kube-system       default-capi-quickstart-2   kubeadm-config                       1      10m
kube-system       default-capi-quickstart-2   kubelet-config                       1      10m
kube-system       default-capi-quickstart-2   kube-root-ca.crt                     1      10m
kube-node-lease   default-capi-quickstart-2   kube-root-ca.crt                     1      10m
kube-public       default-capi-quickstart-2   cluster-info                         3      10m
kube-public       default-capi-quickstart-2   kube-root-ca.crt                     1      10m
default           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 collectionresources
NAME            RESOURCES
any             *
workloads       apps.deployments,apps.daemonsets,apps.statefulsets
kuberesources   .*,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

檢索條件

  • 元信息過濾 (資源名稱，命名空間，集群，創(chuàng)建時間區(qū)間)[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   AGE
kube-system   default-capi-quickstart     extension-apiserver-authentication   6      23m
kube-system   default-capi-quickstart     kubeadm-config                       1      23m
kube-system   default-capi-quickstart     kube-proxy                           2      23m
kube-system   default-capi-quickstart-2   extension-apiserver-authentication   6      14m
kube-system   default-capi-quickstart     kubelet-config                       1      23m
kube-system   default-capi-quickstart     coredns                              1      23m
kube-system   default-capi-quickstart     kube-root-ca.crt                     1      23m
kube-system   default-capi-quickstart-2   coredns                              1      14m
default       default-capi-quickstart     kube-root-ca.crt                     1      23m
kube-system   default-capi-quickstart-2   kube-proxy                           2      14m
kube-system   default-capi-quickstart-2   kubeadm-config                       1      14m
kube-system   default-capi-quickstart-2   kubelet-config                       1      14m
kube-system   default-capi-quickstart-2   kube-root-ca.crt                     1      14m
default       default-capi-quickstart-2   kube-root-ca.crt                     1      14m
  • 模糊搜索[18]
  • 增強的 Field Selector[19]
  • 根據(jù)父輩或者祖輩 Owner 檢索[20]
  • 分頁和排序[21]
  • 自定義條件搜索[22]?

資料鏈接

[1]    Clusterpedia 倉庫: https://github.com/clusterpedia-io/clusterpedia/tree/main/deploy/clusterimportpolicy

[2]    ClusterImportPolicy: https://clusterpedia.io/zh-cn/docs/concepts/cluster-import-policy/

[3]    創(chuàng)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]    詳見: https://github.com/clusterpedia-io/clusterpedia/tree/main/charts

[10]  集群自動導(dǎo)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 中設(shè)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 的資源檢索: 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]  元信息過濾 (資源名稱，命名空間，集群，創(chuàng)建時間區(qū)間): 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]  增強的 Field Selector: https://clusterpedia.io/docs/usage/search/multi-cluster/#field-selector

[20]  根據(jù)父輩或者祖輩 Owner 檢索: https://clusterpedia.io/docs/usage/search/multi-cluster/#search-by-parent-or-ancestor-owner

[21]  分頁和排序: https://clusterpedia.io/docs/usage/search/multi-cluster/#paging-and-sorting

[22]  自定義條件搜索: https://clusterpedia.io/docs/us?age/search/#advanced-searchcustom-conditional-search

責任編輯：未麗燕 來源： 云原生社區(qū)動態(tài)
Cluster檢索集群
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