• 如何查看k8s存在etcd中的数据(转)


    原文 https://yq.aliyun.com/articles/561888

    一直有这个冲动,

    想知道kubernetes往etcd里放了哪些数据,是如何组织的。

    能看到,才有把握知道它的实现和细节。

    找了很多文档,终于找到靠谱的。

    ===========================

    https://www.jianshu.com/p/f9f83dd21770

    ===========================

    我是使用kubeadm工具安装的集群,要解除集群的资源占用要先把一些容器停掉,把kube-apiserver的编排文件从/etc/kubernetes/manifests/目录下先移出来,kubelet检查到会停止相应的pods,没有了kube-apiserver集群不会再创建新的pods,这时kubectl不可用了,使用docker命令把spinnaker项目的容器都删掉系统资源就能空闲出来。这时etcd还是正常的,用docker工具直接进入etcd。
    操作etcd有命令行工具etcdctl,有两个api版本互不兼容的,系统默认的v2版本,kubernetes集群使用的是v3版本,v2版本下是看不到v3版本的数据的,我也是找了些资料才了解这个情况。
    使用环境变量定义api版本
    export ETCDCTL_API=3
    etcd有目录结构类似linux文件系统,获取所有key看一看:
    etcdctl get / --prefix --keys-only


    一看就可以大概理解kubenetes的数据结构了,查询命名空间下所有部署的数据:
    etcdctl get /registry/deployments/default --prefix --keys-only
    把想删除的删掉,列如:
    etcdctl del /registry/deployments/default/elevated-dragonfly-spinn-front50
    删除deployments,pods这可以了,稍微减少一些资源,让kube-apiserver可以正常工作即可,其它资源还可以使用kubectl工具删除
    删掉些资源后退出etcd把kube-apiserver的编排文件放回/etc/kubernetes/manifests目录,服务会再次启动,然后再清理重新部署。


    =======================================
    k8s 1.9.3放在etcd里的根数据结构如下:
     

    etcdctl get / --prefix --keys-only

    /registry/apiregistration.k8s.io/apiservices/v1.

    /registry/apiregistration.k8s.io/apiservices/v1.apps

    /registry/apiregistration.k8s.io/apiservices/v1.authentication.k8s.io

    /registry/apiregistration.k8s.io/apiservices/v1.authorization.k8s.io

    /registry/apiregistration.k8s.io/apiservices/v1.autoscaling

    /registry/apiregistration.k8s.io/apiservices/v1.batch

    /registry/apiregistration.k8s.io/apiservices/v1.networking.k8s.io

    /registry/apiregistration.k8s.io/apiservices/v1.rbac.authorization.k8s.io

    /registry/apiregistration.k8s.io/apiservices/v1.storage.k8s.io

    /registry/apiregistration.k8s.io/apiservices/v1beta1.admissionregistration.k8s.io

    /registry/apiregistration.k8s.io/apiservices/v1beta1.apiextensions.k8s.io

    /registry/apiregistration.k8s.io/apiservices/v1beta1.apps

    /registry/apiregistration.k8s.io/apiservices/v1beta1.authentication.k8s.io

    /registry/apiregistration.k8s.io/apiservices/v1beta1.authorization.k8s.io

    /registry/apiregistration.k8s.io/apiservices/v1beta1.batch

    /registry/apiregistration.k8s.io/apiservices/v1beta1.certificates.k8s.io

    /registry/apiregistration.k8s.io/apiservices/v1beta1.events.k8s.io

    /registry/apiregistration.k8s.io/apiservices/v1beta1.extensions

    /registry/apiregistration.k8s.io/apiservices/v1beta1.policy

    /registry/apiregistration.k8s.io/apiservices/v1beta1.rbac.authorization.k8s.io

    /registry/apiregistration.k8s.io/apiservices/v1beta1.storage.k8s.io

    /registry/apiregistration.k8s.io/apiservices/v1beta2.apps

    /registry/apiregistration.k8s.io/apiservices/v2beta1.autoscaling

    /registry/certificatesigningrequests/node-csr-NMpLG7rhBYiuAyRD739h79x2qhbhWn-UtLPFwJWJU1Y

    /registry/certificatesigningrequests/node-csr-v96LRHUfeRD3iAZgHdUYxDaT1kkHvIilDnLZy2GPSew

    /registry/clusterrolebindings/cluster-admin

    /registry/clusterrolebindings/flannel

    /registry/clusterrolebindings/heapster

    /registry/clusterrolebindings/kubeadm:kubelet-bootstrap

    /registry/clusterrolebindings/kubeadm:node-autoapprove-bootstrap

    /registry/clusterrolebindings/kubeadm:node-autoapprove-certificate-rotation

    /registry/clusterrolebindings/kubeadm:node-proxier

    /registry/clusterrolebindings/kubernetes-dashboard

    /registry/clusterrolebindings/system:aws-cloud-provider

    /registry/clusterrolebindings/system:basic-user

    /registry/clusterrolebindings/system:controller:attachdetach-controller

    /registry/clusterrolebindings/system:controller:certificate-controller

    /registry/clusterrolebindings/system:controller:clusterrole-aggregation-controller

    /registry/clusterrolebindings/system:controller:cronjob-controller

    /registry/clusterrolebindings/system:controller:daemon-set-controller

    /registry/clusterrolebindings/system:controller:deployment-controller

    /registry/clusterrolebindings/system:controller:disruption-controller

    /registry/clusterrolebindings/system:controller:endpoint-controller

    /registry/clusterrolebindings/system:controller:generic-garbage-collector

    /registry/clusterrolebindings/system:controller:horizontal-pod-autoscaler

    /registry/clusterrolebindings/system:controller:job-controller

    /registry/clusterrolebindings/system:controller:namespace-controller

    /registry/clusterrolebindings/system:controller:node-controller

    /registry/clusterrolebindings/system:controller:persistent-volume-binder

    /registry/clusterrolebindings/system:controller:pod-garbage-collector

    /registry/clusterrolebindings/system:controller:replicaset-controller

    /registry/clusterrolebindings/system:controller:replication-controller

    /registry/clusterrolebindings/system:controller:resourcequota-controller

    /registry/clusterrolebindings/system:controller:route-controller

    /registry/clusterrolebindings/system:controller:service-account-controller

    /registry/clusterrolebindings/system:controller:service-controller

    /registry/clusterrolebindings/system:controller:statefulset-controller

    /registry/clusterrolebindings/system:controller:ttl-controller

    /registry/clusterrolebindings/system:coredns

    /registry/clusterrolebindings/system:discovery

    /registry/clusterrolebindings/system:kube-controller-manager

    /registry/clusterrolebindings/system:kube-dns

    /registry/clusterrolebindings/system:kube-scheduler

    /registry/clusterrolebindings/system:node

    /registry/clusterrolebindings/system:node-proxier

    /registry/clusterroles/admin

    /registry/clusterroles/cluster-admin

    /registry/clusterroles/edit

    /registry/clusterroles/flannel

    /registry/clusterroles/system:aggregate-to-admin

    /registry/clusterroles/system:aggregate-to-edit

    /registry/clusterroles/system:aggregate-to-view

    /registry/clusterroles/system:auth-delegator

    /registry/clusterroles/system:aws-cloud-provider

    /registry/clusterroles/system:basic-user

    /registry/clusterroles/system:certificates.k8s.io:certificatesigningrequests:nodeclient

    /registry/clusterroles/system:certificates.k8s.io:certificatesigningrequests:selfnodeclient

    /registry/clusterroles/system:controller:attachdetach-controller

    /registry/clusterroles/system:controller:certificate-controller

    /registry/clusterroles/system:controller:clusterrole-aggregation-controller

    /registry/clusterroles/system:controller:cronjob-controller

    /registry/clusterroles/system:controller:daemon-set-controller

    /registry/clusterroles/system:controller:deployment-controller

    /registry/clusterroles/system:controller:disruption-controller

    /registry/clusterroles/system:controller:endpoint-controller

    /registry/clusterroles/system:controller:generic-garbage-collector

    /registry/clusterroles/system:controller:horizontal-pod-autoscaler

    /registry/clusterroles/system:controller:job-controller

    /registry/clusterroles/system:controller:namespace-controller

    /registry/clusterroles/system:controller:node-controller

    /registry/clusterroles/system:controller:persistent-volume-binder

    /registry/clusterroles/system:controller:pod-garbage-collector

    /registry/clusterroles/system:controller:replicaset-controller

    /registry/clusterroles/system:controller:replication-controller

    /registry/clusterroles/system:controller:resourcequota-controller

    /registry/clusterroles/system:controller:route-controller

    /registry/clusterroles/system:controller:service-account-controller

    /registry/clusterroles/system:controller:service-controller

    /registry/clusterroles/system:controller:statefulset-controller

    /registry/clusterroles/system:controller:ttl-controller

    /registry/clusterroles/system:coredns

    /registry/clusterroles/system:discovery

    /registry/clusterroles/system:heapster

    /registry/clusterroles/system:kube-aggregator

    /registry/clusterroles/system:kube-controller-manager

    /registry/clusterroles/system:kube-dns

    /registry/clusterroles/system:kube-scheduler

    /registry/clusterroles/system:node

    /registry/clusterroles/system:node-bootstrapper

    /registry/clusterroles/system:node-problem-detector

    /registry/clusterroles/system:node-proxier

    /registry/clusterroles/system:persistent-volume-provisioner

    /registry/clusterroles/view

    /registry/configmaps/kube-public/cluster-info

    /registry/configmaps/kube-system/coredns

    /registry/configmaps/kube-system/extension-apiserver-authentication

    /registry/configmaps/kube-system/kube-flannel-cfg

    /registry/configmaps/kube-system/kube-proxy

    /registry/configmaps/kube-system/kubeadm-config

    /registry/configmaps/kube-system/kubernetes-dashboard-settings

    /registry/controllerrevisions/kube-system/kube-flannel-ds-dd8484577

    /registry/controllerrevisions/kube-system/kube-proxy-95cfb667c

    /registry/cronjobs/default/hello

    /registry/daemonsets/kube-system/kube-flannel-ds

    /registry/daemonsets/kube-system/kube-proxy

    /registry/deployments/default/flower

    /registry/deployments/default/pc-saveapi

    /registry/deployments/default/pxxxm-django

    /registry/deployments/default/pxxxm-redis

    /registry/deployments/default/pxxxm-tengine-proxy

    /registry/deployments/default/pxxxm-tengine-static

    /registry/deployments/default/pxxxmlogapi-nj

    /registry/deployments/kube-system/coredns

    /registry/deployments/kube-system/heapster

    /registry/deployments/kube-system/kubernetes-dashboard

    /registry/deployments/kube-system/monitoring-grafana

    /registry/deployments/kube-system/monitoring-influxdb

    /registry/events/default/flower-554b58b968-n48sj.151de36ccc190d41

    /registry/events/default/flower-554b58b968-n48sj.151de36e0d128ca9

    /registry/events/default/hello.151e1bcd521ee391

    /registry/jobs/default/hello-1521622920

    /registry/jobs/default/hello-1521622980

    /registry/jobs/default/hello-1521623040

    /registry/minions/cnsz131381

    /registry/minions/cnsz131382

    /registry/minions/cnsz131383

    /registry/namespaces/default

    /registry/namespaces/kube-public

    /registry/namespaces/kube-system

    /registry/pods/default/flower-554b58b968-n48sj

    /registry/pods/default/hello-1521622920-5z4bl

    /registry/pods/default/hello-1521622980-4qcrd

    /registry/pods/default/hello-1521623040-szf4f

    /registry/pods/default/pc-saveapi-58cf87b4f5-5x2d8

    /registry/pods/default/pxxxm-django-8466f46d84-4mjtf

    /registry/pods/default/pxxxm-django-8466f46d84-pnqzp

    /registry/pods/default/pxxxm-django-8466f46d84-x5d8z

    /registry/pods/default/pxxxm-redis-767c5d5966-l88qj

    /registry/pods/default/pxxxm-tengine-proxy-75d874d898-8275h

    /registry/pods/default/pxxxm-tengine-static-7d7bb5d5b6-7568z

    /registry/pods/default/pxxxmlogapi-nj-687cc89b96-ps4np

    /registry/pods/kube-system/coredns-65dcdb4cf-hgmdv

    /registry/pods/kube-system/etcd-cnsz131383

    /registry/pods/kube-system/heapster-5996df699d-d8798

    /registry/pods/kube-system/kube-apiserver-cnsz131383

    /registry/pods/kube-system/kube-controller-manager-cnsz131383

    /registry/pods/kube-system/kube-flannel-ds-gr8jp

    /registry/pods/kube-system/kube-flannel-ds-p4tpq

    /registry/pods/kube-system/kube-flannel-ds-z7s96

    /registry/pods/kube-system/kube-proxy-cgjhk

    /registry/pods/kube-system/kube-proxy-f7snz

    /registry/pods/kube-system/kube-proxy-l98gl

    /registry/pods/kube-system/kube-scheduler-cnsz131383

    /registry/pods/kube-system/kubernetes-dashboard-5bd6f767c7-vr6sg

    /registry/pods/kube-system/monitoring-grafana-6bf544559d-cd6d4

    /registry/pods/kube-system/monitoring-influxdb-865d95895b-n9sls

    /registry/ranges/serviceips

    /registry/ranges/servicenodeports

    /registry/replicasets/default/flower-554b58b968

    /registry/replicasets/default/pc-saveapi-58cf87b4f5

    /registry/replicasets/default/pxxxm-django-8466f46d84

    /registry/replicasets/default/pxxxm-redis-767c5d5966

    /registry/replicasets/default/pxxxm-tengine-proxy-75d874d898

    /registry/replicasets/default/pxxxm-tengine-static-7d7bb5d5b6

    /registry/replicasets/default/pxxxmlogapi-nj-687cc89b96

    /registry/replicasets/kube-system/coredns-65dcdb4cf

    /registry/replicasets/kube-system/heapster-5996df699d

    /registry/replicasets/kube-system/kubernetes-dashboard-5bd6f767c7

    /registry/replicasets/kube-system/monitoring-grafana-6bf544559d

    /registry/replicasets/kube-system/monitoring-influxdb-865d95895b

    /registry/rolebindings/kube-public/kubeadm:bootstrap-signer-clusterinfo

    /registry/rolebindings/kube-public/system:controller:bootstrap-signer

    /registry/rolebindings/kube-system/kubernetes-dashboard-minimal

    /registry/rolebindings/kube-system/system::leader-locking-kube-controller-manager

    /registry/rolebindings/kube-system/system::leader-locking-kube-scheduler

    /registry/rolebindings/kube-system/system:controller:bootstrap-signer

    /registry/rolebindings/kube-system/system:controller:cloud-provider

    /registry/rolebindings/kube-system/system:controller:token-cleaner

    /registry/roles/kube-public/kubeadm:bootstrap-signer-clusterinfo

    /registry/roles/kube-public/system:controller:bootstrap-signer

    /registry/roles/kube-system/extension-apiserver-authentication-reader

    /registry/roles/kube-system/kubernetes-dashboard-minimal

    /registry/roles/kube-system/system::leader-locking-kube-controller-manager

    /registry/roles/kube-system/system::leader-locking-kube-scheduler

    /registry/roles/kube-system/system:controller:bootstrap-signer

    /registry/roles/kube-system/system:controller:cloud-provider

    /registry/roles/kube-system/system:controller:token-cleaner

    /registry/secrets/default/default-token-hfj82

    /registry/secrets/kube-public/default-token-wpbfs

    /registry/secrets/kube-system/attachdetach-controller-token-7jsks

    /registry/secrets/kube-system/bootstrap-signer-token-xs87g

    /registry/secrets/kube-system/certificate-controller-token-x4swr

    /registry/secrets/kube-system/clusterrole-aggregation-controller-token-z7w85

    /registry/secrets/kube-system/coredns-token-tbbbw

    /registry/secrets/kube-system/cronjob-controller-token-p44bn

    /registry/secrets/kube-system/daemon-set-controller-token-4klc2

    /registry/secrets/kube-system/default-token-g9lcp

    /registry/secrets/kube-system/deployment-controller-token-gfcdt

    /registry/secrets/kube-system/disruption-controller-token-vs4dz

    /registry/secrets/kube-system/endpoint-controller-token-92kn2

    /registry/secrets/kube-system/flannel-token-wvgjq

    /registry/secrets/kube-system/generic-garbage-collector-token-pcpnq

    /registry/secrets/kube-system/heapster-token-6szhz

    /registry/secrets/kube-system/horizontal-pod-autoscaler-token-xqcl5

    /registry/secrets/kube-system/job-controller-token-422zr

    /registry/secrets/kube-system/kube-proxy-token-k5rfq

    /registry/secrets/kube-system/kubernetes-dashboard-certs

    /registry/secrets/kube-system/kubernetes-dashboard-key-holder

    /registry/secrets/kube-system/kubernetes-dashboard-token-kpkw7

    /registry/secrets/kube-system/namespace-controller-token-r57ss

    /registry/secrets/kube-system/node-controller-token-5f7sm

    /registry/secrets/kube-system/persistent-volume-binder-token-7rnt2

    /registry/secrets/kube-system/pod-garbage-collector-token-2txwf

    /registry/secrets/kube-system/replicaset-controller-token-zh9xq

    /registry/secrets/kube-system/replication-controller-token-q69jz

    /registry/secrets/kube-system/resourcequota-controller-token-92hn4

    /registry/secrets/kube-system/service-account-controller-token-vvw5d

    /registry/secrets/kube-system/service-controller-token-lslnf

    /registry/secrets/kube-system/statefulset-controller-token-wdqjt

    /registry/secrets/kube-system/token-cleaner-token-9zzpv

    /registry/secrets/kube-system/ttl-controller-token-tc7pl

    /registry/serviceaccounts/default/default

    /registry/serviceaccounts/kube-public/default

    /registry/serviceaccounts/kube-system/attachdetach-controller

    /registry/serviceaccounts/kube-system/bootstrap-signer

    /registry/serviceaccounts/kube-system/certificate-controller

    /registry/serviceaccounts/kube-system/clusterrole-aggregation-controller

    /registry/serviceaccounts/kube-system/coredns

    /registry/serviceaccounts/kube-system/cronjob-controller

    /registry/serviceaccounts/kube-system/daemon-set-controller

    /registry/serviceaccounts/kube-system/default

    /registry/serviceaccounts/kube-system/deployment-controller

    /registry/serviceaccounts/kube-system/disruption-controller

    /registry/serviceaccounts/kube-system/endpoint-controller

    /registry/serviceaccounts/kube-system/flannel

    /registry/serviceaccounts/kube-system/generic-garbage-collector

    /registry/serviceaccounts/kube-system/heapster

    /registry/serviceaccounts/kube-system/horizontal-pod-autoscaler

    /registry/serviceaccounts/kube-system/job-controller

    /registry/serviceaccounts/kube-system/kube-proxy

    /registry/serviceaccounts/kube-system/kubernetes-dashboard

    /registry/serviceaccounts/kube-system/namespace-controller

    /registry/serviceaccounts/kube-system/node-controller

    /registry/serviceaccounts/kube-system/persistent-volume-binder

    /registry/serviceaccounts/kube-system/pod-garbage-collector

    /registry/serviceaccounts/kube-system/replicaset-controller

    /registry/serviceaccounts/kube-system/replication-controller

    /registry/serviceaccounts/kube-system/resourcequota-controller

    /registry/serviceaccounts/kube-system/service-account-controller

    /registry/serviceaccounts/kube-system/service-controller

    /registry/serviceaccounts/kube-system/statefulset-controller

    /registry/serviceaccounts/kube-system/token-cleaner

    /registry/serviceaccounts/kube-system/ttl-controller

    /registry/services/endpoints/default/flower

    /registry/services/endpoints/default/kubernetes

    /registry/services/endpoints/default/pc-saveapi

    /registry/services/endpoints/default/pxxxm-django

    /registry/services/endpoints/default/pxxxm-redis

    /registry/services/endpoints/default/pxxxm-tengine-proxy

    /registry/services/endpoints/default/pxxxm-tengine-static

    /registry/services/endpoints/default/pxxxmlogapi-nj

    /registry/services/endpoints/kube-system/heapster

    /registry/services/endpoints/kube-system/kube-controller-manager

    /registry/services/endpoints/kube-system/kube-dns

    /registry/services/endpoints/kube-system/kube-scheduler

    /registry/services/endpoints/kube-system/kubernetes-dashboard

    /registry/services/endpoints/kube-system/monitoring-grafana

    /registry/services/endpoints/kube-system/monitoring-influxdb

    /registry/services/specs/default/flower

    /registry/services/specs/default/kubernetes

    /registry/services/specs/default/pc-saveapi

    /registry/services/specs/default/pxxxm-django

    /registry/services/specs/default/pxxxm-redis

    /registry/services/specs/default/pxxxm-tengine-proxy

    /registry/services/specs/default/pxxxm-tengine-static

    /registry/services/specs/default/pxxxmlogapi-nj

    /registry/services/specs/kube-system/heapster

    /registry/services/specs/kube-system/kube-dns

    /registry/services/specs/kube-system/kubernetes-dashboard

    /registry/services/specs/kube-system/monitoring-grafana

    /registry/services/specs/kube-system/monitoring-influxdb

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  • 原文地址:https://www.cnblogs.com/devilwind/p/8931124.html
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