有別於之前筆記在 LXD 裡面設置 Minikube 得準備一堆預備動作，KIND 蠻好心的～簡簡單單的把 K8s 關在容器裡面～！
這樣一來～測試環境空間省很多，資源也比較省～更比之前辛苦的用 LXD 關住 Minikube 容易多了～
本處準備的 Docker Host 為 CentOS 8Stream，不過基本上用其他 OS 環境的 Docker 也可以。首先安裝 Docker：因為有點忘記，所以回頭參考一下 Install Docker Engine on CentOS | Docker Documentation
[goodgame@k8sindocker ~]$ cat /etc/*release
CentOS Stream release 8
NAME="CentOS Stream"
VERSION="8"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="8"
PLATFORM_ID="platform:el8"
PRETTY_NAME="CentOS Stream 8"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:8"
HOME_URL="https://centos.org/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux 8"
REDHAT_SUPPORT_PRODUCT_VERSION="CentOS Stream"
CentOS Stream release 8
CentOS Stream release 8
[goodgame@k8sindocker ~]$ sudo yum install -y wget
[goodgame@k8sindocker ~]$ sudo wget -P /etc/yum.repos.d/ https://download.docker.com/linux/centos/docker-ce.repo
[goodgame@k8sindocker ~]$ sudo yum install -y docker-ce docker-ce-cli containerd.io
[goodgame@k8sindocker ~]$ sudo service docker start
[goodgame@k8sindocker ~]$ sudo chkconfig docker on
[goodgame@k8sindocker ~]$ sudo usermod -aG docker $USER
[goodgame@k8sindocker ~]$ newgrp docker
[goodgame@k8sindocker ~]$ docker run --rm hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
b8dfde127a29: Pull complete
Digest: sha256:7d91b69e04a9029b99f3585aaaccae2baa80bcf318f4a5d2165a9898cd2dc0a1
Status: Downloaded newer image for hello-world:latest
Hello from Docker!
This message shows that your installation appears to be working correctly.
To generate this message, Docker took the following steps:
1. The Docker client contacted the Docker daemon.
2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
(amd64)
3. The Docker daemon created a new container from that image which runs the
executable that produces the output you are currently reading.
4. The Docker daemon streamed that output to the Docker client, which sent it
to your terminal.
To try something more ambitious, you can run an Ubuntu container with:
$ docker run -it ubuntu bash
Share images, automate workflows, and more with a free Docker ID:
https://hub.docker.com/
For more examples and ideas, visit:
https://docs.docker.com/get-started/
[goodgame@k8sindocker ~]$
接著就可以安裝 KIND 了：除了 KIND 之外，也需要 kubectl 這個 K8s CLI 元件，才能跟 K8s 叢集互動。安裝步驟可以參考 kind, Kubernetes clusters using Docker – Quick Start，而關於 kubectl 的資訊可以參考這 Install Tools | Kubernetes
[goodgame@k8sindocker ~]$ sudo wget https://kind.sigs.k8s.io/dl/v0.11.1/kind-linux-amd64 -P /usr/local/bin/ --2021-09-10 09:41:05-- https://kind.sigs.k8s.io/dl/v0.11.1/kind-linux-amd64 Resolving kind.sigs.k8s.io (kind.sigs.k8s.io)... 67.207.81.229, 34.194.149.67, 2600:1f18:2489:8202:8b08:4681:8310:cd65, ... Connecting to kind.sigs.k8s.io (kind.sigs.k8s.io)|67.207.81.229|:443... connected. GnuTLS: Resource temporarily unavailable, try again. GnuTLS: Resource temporarily unavailable, try again. GnuTLS: Resource temporarily unavailable, try again. HTTP request sent, awaiting response... 301 Moved Permanently Location: https://github.com/kubernetes-sigs/kind/releases/download/v0.11.1/kind-linux-amd64 [following] --2021-09-10 09:41:05-- https://github.com/kubernetes-sigs/kind/releases/download/v0.11.1/kind-linux-amd64 Resolving github.com (github.com)... 140.82.112.4 Connecting to github.com (github.com)|140.82.112.4|:443... connected. HTTP request sent, awaiting response... 302 Found Location: https://github-releases.githubusercontent.com/148545807/35090700-bf13-11eb-86f7-457d9d738822?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIWNJYAX4CSVEH53A%2F20210910%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20210910T094105Z&X-Amz-Expires=300&X-Amz-Signature=69916e14682ecbe451c46392f4cf20c73631307cb1ea644664f7bb950a7d9dff&X-Amz-SignedHeaders=host&actor_id=0&key_id=0&repo_id=148545807&response-content-disposition=attachment%3B%20filename%3Dkind-linux-amd64&response-content-type=application%2Foctet-stream [following] --2021-09-10 09:41:05-- https://github-releases.githubusercontent.com/148545807/35090700-bf13-11eb-86f7-457d9d738822?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIWNJYAX4CSVEH53A%2F20210910%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20210910T094105Z&X-Amz-Expires=300&X-Amz-Signature=69916e14682ecbe451c46392f4cf20c73631307cb1ea644664f7bb950a7d9dff&X-Amz-SignedHeaders=host&actor_id=0&key_id=0&repo_id=148545807&response-content-disposition=attachment%3B%20filename%3Dkind-linux-amd64&response-content-type=application%2Foctet-stream Resolving github-releases.githubusercontent.com (github-releases.githubusercontent.com)... 185.199.108.154, 185.199.109.154, 185.199.110.154, ... Connecting to github-releases.githubusercontent.com (github-releases.githubusercontent.com)|185.199.108.154|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 6820758 (6.5M) [application/octet-stream] Saving to: ‘/usr/local/bin/kind-linux-amd64’ kind-linux-amd64 100%[=============================>] 6.50M --.-KB/s in 0.08s 2021-09-10 09:41:05 (79.8 MB/s) - ‘/usr/local/bin/kind-linux-amd64’ saved [6820758/6820758] [goodgame@k8sindocker ~]$ sudo chmod +x /usr/local/bin/kind-linux-amd64 [goodgame@k8sindocker ~]$ kind-linux-amd64 --version kind version 0.11.1 [goodgame@k8sindocker ~]$
[goodgame@k8sindocker ~]$ sudo wget "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl" -P /usr/local/bin/
--2021-09-10 09:41:49-- https://dl.k8s.io/release/v1.22.1/bin/linux/amd64/kubectl
Resolving dl.k8s.io (dl.k8s.io)... 34.107.204.206, 2600:1901:0:26f3::
Connecting to dl.k8s.io (dl.k8s.io)|34.107.204.206|:443... connected.
HTTP request sent, awaiting response... 302 Moved Temporarily
Location: https://storage.googleapis.com/kubernetes-release/release/v1.22.1/bin/linux/amd64/kubectl [following]
--2021-09-10 09:41:49-- https://storage.googleapis.com/kubernetes-release/release/v1.22.1/bin/linux/amd64/kubectl
Resolving storage.googleapis.com (storage.googleapis.com)... 142.250.148.128, 209.85.200.128, 209.85.234.128, ...
Connecting to storage.googleapis.com (storage.googleapis.com)|142.250.148.128|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 46907392 (45M) [application/octet-stream]
Saving to: ‘/usr/local/bin/kubectl’
kubectl 100%[=============================>] 44.73M 258MB/s in 0.2s
2021-09-10 09:41:50 (258 MB/s) - ‘/usr/local/bin/kubectl’ saved [46907392/46907392]
[goodgame@k8sindocker ~]$ sudo chmod +x /usr/local/bin/kubectl
[goodgame@k8sindocker ~]$ kubectl version
Client Version: version.Info{Major:"1", Minor:"22", GitVersion:"v1.22.1", GitCommit:"632ed300f2c34f6d6d15ca4cef3d3c7073412212", GitTreeState:"clean", BuildDate:"2021-08-19T15:45:37Z", GoVersion:"go1.16.7", Compiler:"gc", Platform:"linux/amd64"}
The connection to the server localhost:8080 was refused - did you specify the right host or port?
[goodgame@k8sindocker ~]$
接著就能夠初始化一個 K8s 了：這邊目標是初始化一個 1+2 的 K8s 環境
[goodgame@k8sindocker ~]$ kind-linux-amd64 create cluster --help
Creates a local Kubernetes cluster using Docker container 'nodes'
Usage:
kind create cluster [flags]
Flags:
--config string path to a kind config file
-h, --help help for cluster
--image string node docker image to use for booting the cluster
--kubeconfig string sets kubeconfig path instead of $KUBECONFIG or $HOME/.kube/config
--name string cluster name, overrides KIND_CLUSTER_NAME, config (default kind)
--retain retain nodes for debugging when cluster creation fails
--wait duration wait for control plane node to be ready (default 0s)
Global Flags:
--loglevel string DEPRECATED: see -v instead
-q, --quiet silence all stderr output
-v, --verbosity int32 info log verbosity
[goodgame@k8sindocker ~]$
[goodgame@k8sindocker ~]$ cat << EOF >> ~/kind-3node-config.yaml # three node (two workers) cluster config kind: Cluster apiVersion: kind.x-k8s.io/v1alpha4 nodes: - role: control-plane - role: worker - role: worker EOF [goodgame@k8sindocker ~]$ [goodgame@k8sindocker ~]$ kind-linux-amd64 create cluster --name edbpgsql --config kind-3node-config.yaml Creating cluster "edbpgsql" ... ✓ Ensuring node image (kindest/node:v1.21.1) 🖼 ✓ Preparing nodes 📦 📦 📦 ✓ Writing configuration 📜 ✓ Starting control-plane 🕹️ ✓ Installing CNI 🔌 ✓ Installing StorageClass 💾 ✓ Joining worker nodes 🚜 Set kubectl context to "kind-edbpgsql" You can now use your cluster with: kubectl cluster-info --context kind-edbpgsql Have a nice day! 👋 Not sure what to do next? 😅 Check out https://kind.sigs.k8s.io/docs/user/quick-start/ [goodgame@k8sindocker ~]$ [goodgame@k8sindocker ~]$ kubectl cluster-info --context kind-edbpgsql Kubernetes control plane is running at https://127.0.0.1:43121 KubeDNS is running at https://127.0.0.1:43121/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'. [goodgame@k8sindocker ~]$ [goodgame@k8sindocker ~]$ kubectl get nodes NAME STATUS ROLES AGE VERSION edbpgsql-control-plane Ready control-plane,master 14m v1.21.1 edbpgsql-worker Ready <none> 14m v1.21.1 edbpgsql-worker2 Ready <none> 14m v1.21.1 [goodgame@k8sindocker ~]$
[goodgame@k8sindocker ~]$ ##這是 client 工具 kubectl 的設定目錄
[goodgame@k8sindocker ~]$ ls ~/.kube/
cache config
[goodgame@k8sindocker ~]$ tree -d ~/.kube/
/home/goodgame/.kube/
└── cache
├── discovery
│ └── 127.0.0.1_43121
│ ├── admissionregistration.k8s.io
│ │ ├── v1
│ │ └── v1beta1
│ ├── apiextensions.k8s.io
│ │ ├── v1
│ │ └── v1beta1
│ ├── apiregistration.k8s.io
│ │ ├── v1
│ │ └── v1beta1
│ ├── apps
│ │ └── v1
│ ├── authentication.k8s.io
│ │ ├── v1
│ │ └── v1beta1
│ ├── authorization.k8s.io
│ │ ├── v1
│ │ └── v1beta1
│ ├── autoscaling
│ │ ├── v1
│ │ ├── v2beta1
│ │ └── v2beta2
│ ├── batch
│ │ ├── v1
│ │ └── v1beta1
│ ├── certificates.k8s.io
│ │ ├── v1
│ │ └── v1beta1
│ ├── coordination.k8s.io
│ │ ├── v1
│ │ └── v1beta1
│ ├── discovery.k8s.io
│ │ ├── v1
│ │ └── v1beta1
│ ├── events.k8s.io
│ │ ├── v1
│ │ └── v1beta1
│ ├── extensions
│ │ └── v1beta1
│ ├── flowcontrol.apiserver.k8s.io
│ │ └── v1beta1
│ ├── networking.k8s.io
│ │ ├── v1
│ │ └── v1beta1
│ ├── node.k8s.io
│ │ ├── v1
│ │ └── v1beta1
│ ├── policy
│ │ ├── v1
│ │ └── v1beta1
│ ├── postgresql.k8s.enterprisedb.io
│ │ ├── v1
│ │ └── v1alpha1
│ ├── rbac.authorization.k8s.io
│ │ ├── v1
│ │ └── v1beta1
│ ├── scheduling.k8s.io
│ │ ├── v1
│ │ └── v1beta1
│ ├── storage.k8s.io
│ │ ├── v1
│ │ └── v1beta1
│ └── v1
└── http
66 directories
[goodgame@k8sindocker ~]$
進到 container 裡面喵一下：這三個 docker container 被我們當作主機，運行 K8s 三節點叢集
[goodgame@k8sindocker ~]$ docker container exec -it edbpgsql-control-plane bash root@edbpgsql-control-plane:/# ps aux USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.2 18664 9656 ? Ss 09:46 0:00 /sbin/init root 182 0.0 0.1 23688 6860 ? S<s 09:47 0:00 /lib/systemd/systemd-journa root 203 0.5 1.3 1904332 51240 ? Ssl 09:47 0:53 /usr/local/bin/containerd root 341 0.0 0.4 712928 17148 ? Sl 09:47 0:02 /usr/local/bin/containerd-s root 342 0.0 0.4 712928 16816 ? Sl 09:47 0:02 /usr/local/bin/containerd-s root 371 0.0 0.4 713184 16832 ? Sl 09:47 0:02 /usr/local/bin/containerd-s root 376 0.0 0.4 713184 16056 ? Sl 09:47 0:02 /usr/local/bin/containerd-s 65535 429 0.0 0.0 972 4 ? Ss 09:47 0:00 /pause 65535 435 0.0 0.0 972 4 ? Ss 09:47 0:00 /pause 65535 438 0.0 0.0 972 4 ? Ss 09:47 0:00 /pause 65535 444 0.0 0.0 972 4 ? Ss 09:47 0:00 /pause root 559 5.7 10.5 1240896 404604 ? Ssl 09:47 10:09 kube-apiserver --advertise- root 634 1.6 1.9 10681088 75380 ? Ssl 09:47 2:57 etcd --advertise-client-url root 674 3.1 2.6 1857896 99728 ? Ssl 09:48 5:30 /usr/bin/kubelet --bootstra root 783 0.0 0.4 713184 16836 ? Sl 09:48 0:02 /usr/local/bin/containerd-s 65535 803 0.0 0.0 972 4 ? Ss 09:48 0:00 /pause root 815 0.0 0.4 713184 16520 ? Sl 09:48 0:02 /usr/local/bin/containerd-s 65535 842 0.0 0.0 972 4 ? Ss 09:48 0:00 /pause root 892 0.0 0.7 747628 28224 ? Ssl 09:48 0:02 /usr/local/bin/kube-proxy - root 1037 0.0 0.7 732352 28072 ? Ssl 09:48 0:03 /bin/kindnetd root 1238 0.0 0.4 712928 16536 ? Sl 09:49 0:02 /usr/local/bin/containerd-s 65535 1258 0.0 0.0 972 4 ? Ss 09:49 0:00 /pause root 1280 0.0 0.4 712928 17692 ? Sl 09:49 0:02 /usr/local/bin/containerd-s 65535 1300 0.0 0.0 972 4 ? Ss 09:49 0:00 /pause root 1347 0.0 0.4 713184 16996 ? Sl 09:49 0:02 /usr/local/bin/containerd-s 65535 1366 0.0 0.0 972 4 ? Ss 09:49 0:00 /pause root 1502 0.1 1.1 746520 43868 ? Ssl 09:49 0:20 /coredns -conf /etc/coredns root 1525 0.2 1.1 746264 43720 ? Ssl 09:49 0:21 /coredns -conf /etc/coredns root 11135 0.2 1.3 752024 50800 ? Ssl 10:31 0:23 kube-scheduler --authentica root 11150 1.4 2.7 820576 103804 ? Ssl 10:31 1:56 kube-controller-manager --a root 11830 0.1 0.7 138472 29296 ? Ssl 10:33 0:08 local-path-provisioner --de root 45587 0.1 0.0 4472 3732 pts/1 Ss 12:43 0:00 bash root 45640 0.0 0.0 6848 3024 pts/1 R+ 12:43 0:00 ps aux root@edbpgsql-control-plane:/# root@edbpgsql-control-plane:/# kubectl get nodes NAME STATUS ROLES AGE VERSION edbpgsql-control-plane Ready control-plane,master 176m v1.21.1 edbpgsql-worker Ready <none> 175m v1.21.1 edbpgsql-worker2 Ready <none> 175m v1.21.1 root@edbpgsql-control-plane:/#
[goodgame@k8sindocker ~]$ docker container exec -it edbpgsql-worker bash root@edbpgsql-worker:/# ps aux USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.2 18472 9556 ? Ss 09:46 0:00 /sbin/init root 185 0.0 0.2 25620 8724 ? S<s 09:47 0:00 /lib/systemd/systemd-journa root 197 0.4 1.3 1856884 52316 ? Ssl 09:47 0:53 /usr/local/bin/containerd root 239 1.9 2.3 1857384 91152 ? Ssl 09:48 3:28 /usr/bin/kubelet --bootstra root 327 0.0 0.4 713184 16768 ? Sl 09:48 0:02 /usr/local/bin/containerd-s 65535 353 0.0 0.0 972 4 ? Ss 09:48 0:00 /pause root 354 0.0 0.4 712928 16544 ? Sl 09:48 0:02 /usr/local/bin/containerd-s 65535 380 0.0 0.0 972 4 ? Ss 09:48 0:00 /pause root 459 0.0 0.4 732352 18904 ? Ssl 09:49 0:03 /bin/kindnetd root 485 0.0 0.9 747628 36296 ? Ssl 09:49 0:02 /usr/local/bin/kube-proxy - root 1909 0.0 0.4 713184 17168 ? Sl 10:10 0:02 /usr/local/bin/containerd-s 1001 1929 0.0 0.0 972 4 ? Ss 10:10 0:00 /pause 1001 4776 0.3 1.5 745452 59304 ? Ssl 10:33 0:25 /manager controller --enabl root 4879 0.0 0.4 713440 17204 ? Sl 10:33 0:01 /usr/local/bin/containerd-s 26 4899 0.0 0.0 972 4 ? Ss 10:33 0:00 /pause 26 5035 0.0 1.1 744684 45256 ? Ssl 10:34 0:02 /controller/manager instanc 26 5053 0.0 0.6 285848 26144 ? S 10:34 0:01 postgres -D /var/lib/postgr 26 5058 0.0 0.1 136596 4760 ? Ss 10:34 0:00 postgres: cluster-example: 26 5059 0.0 0.1 286008 7200 ? Ss 10:34 0:00 postgres: cluster-example: 26 5070 0.0 0.1 285848 5992 ? Ss 10:34 0:00 postgres: cluster-example: 26 5071 0.0 0.1 285848 6068 ? Ss 10:34 0:00 postgres: cluster-example: 26 5073 0.0 0.1 138720 4832 ? Ss 10:34 0:00 postgres: cluster-example: 26 5078 0.0 0.3 295224 12408 ? Ss 10:34 0:06 postgres: cluster-example: root 5691 0.0 0.2 713184 10316 ? Sl 10:34 0:01 /usr/local/bin/containerd-s 26 5709 0.0 0.0 972 4 ? Ss 10:34 0:00 /pause 26 5889 0.0 0.9 744940 37172 ? Ssl 10:34 0:02 /controller/manager instanc 26 5944 0.0 0.6 285848 26332 ? S 10:34 0:01 postgres -D /var/lib/postgr 26 5949 0.0 0.1 136596 4656 ? Ss 10:34 0:00 postgres: cluster-example: 26 5950 0.0 0.1 286008 7108 ? Ss 10:34 0:00 postgres: cluster-example: 26 5967 0.0 0.1 285848 5896 ? Ss 10:34 0:00 postgres: cluster-example: 26 5968 0.0 0.1 285848 6020 ? Ss 10:34 0:00 postgres: cluster-example: 26 5970 0.0 0.1 138720 4764 ? Ss 10:34 0:00 postgres: cluster-example: 26 5980 0.0 0.3 295224 12304 ? Ss 10:34 0:06 postgres: cluster-example: root 28680 0.3 0.0 4476 3532 pts/1 Ss 12:45 0:00 bash root 28692 0.0 0.0 6848 3152 pts/1 R+ 12:45 0:00 ps aux root@edbpgsql-worker:/#
[goodgame@k8sindocker ~]$ docker container exec -it edbpgsql-worker2 bash root@edbpgsql-worker2:/# ps aux USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.2 18472 10988 ? Ss 09:46 0:00 /sbin/init root 184 0.0 0.1 23688 6724 ? S<s 09:47 0:00 /lib/systemd/systemd-journa root 196 0.4 1.2 1872252 49172 ? Ssl 09:47 0:52 /usr/local/bin/containerd root 239 1.5 2.2 1857128 87900 ? Ssl 09:48 2:48 /usr/bin/kubelet --bootstra root 319 0.0 0.4 713184 16652 ? Sl 09:48 0:02 /usr/local/bin/containerd-s 65535 338 0.0 0.0 972 4 ? Ss 09:48 0:00 /pause root 358 0.0 0.4 713184 17916 ? Sl 09:48 0:02 /usr/local/bin/containerd-s 65535 380 0.0 0.0 972 4 ? Ss 09:48 0:00 /pause root 442 0.0 0.7 747372 28040 ? Ssl 09:49 0:02 /usr/local/bin/kube-proxy - root 495 0.0 0.6 732352 26504 ? Ssl 09:49 0:03 /bin/kindnetd root 3894 0.0 0.4 712928 16496 ? Sl 10:32 0:02 /usr/local/bin/containerd-s 26 3912 0.0 0.0 972 4 ? Ss 10:32 0:00 /pause 26 4009 0.0 1.1 744940 43904 ? Ssl 10:32 0:03 /controller/manager instanc 26 4064 0.0 0.6 285848 25940 ? S 10:32 0:01 postgres -D /var/lib/postgr 26 4070 0.0 0.1 136596 5136 ? Ss 10:32 0:00 postgres: cluster-example: 26 4072 0.0 0.3 285960 12524 ? Ss 10:32 0:00 postgres: cluster-example: 26 4073 0.0 0.1 285980 6164 ? Ss 10:32 0:00 postgres: cluster-example: 26 4074 0.0 0.2 285848 10292 ? Ss 10:32 0:00 postgres: cluster-example: 26 4075 0.0 0.2 286532 8980 ? Ss 10:32 0:00 postgres: cluster-example: 26 4076 0.0 0.1 138720 6012 ? Ss 10:32 0:00 postgres: cluster-example: 26 4077 0.0 0.1 138856 5176 ? Ss 10:32 0:00 postgres: cluster-example: 26 4078 0.0 0.1 286412 7016 ? Ss 10:32 0:00 postgres: cluster-example: 26 4554 0.0 0.3 287040 12900 ? Ss 10:34 0:00 postgres: cluster-example: 26 4798 0.0 0.3 287120 12892 ? Ss 10:34 0:00 postgres: cluster-example: root 18416 0.3 0.0 4476 3556 pts/1 Ss 12:49 0:00 bash root 18434 0.0 0.0 6848 3220 pts/1 R+ 12:49 0:00 ps aux root@edbpgsql-worker2:/#
看一下這個環境的記憶體用量
[goodgame@k8sindocker ~]$ free -h
total used free shared buff/cache available
Mem: 3.6Gi 1.2Gi 700Mi 33Mi 1.7Gi 2.2Gi
Swap: 0B 0B 0B
[goodgame@k8sindocker ~]$
不過啟停就比較困擾惹～KIND 在這點就不是很 KIND。。
除惹軟體面的實作尚未完成，KIND 的維護者同時希望不要濫用 KIND～
因此～每次在 KIND 上的測試都是重頭開始～
於是，這邊紀錄砍掉環境的方式
[goodgame@k8sindocker ~]$ kind-linux-amd64 delete cluster --name edbpgsql Deleting cluster "edbpgsql" ... [goodgame@k8sindocker ~]$
參考資料
Deploy PostgreSQL on Kubernetes Easily: Scalable and High Available Postgres Cluster on K8 Pods
Cloud Native PostgreSQL for Application Developers | The EDB Blog
Kubernetes in Docker (kind). kind 是 Kubernetes 下的一個子專案，全稱是… | by Ching Yi, Chan | InfuseAI | Medium
Goodbye minikube. I've been using minikube as my local… | by Nicolas Fränkel | Medium
使用WSL 2 與Docker Desktop 架設Kubernetes 多節點叢集環境(KinD) | The Will Will Web
Day 6 - K3D與KIND 的部署示範 - iT 邦幫忙::一起幫忙解決難題，拯救 IT 人的一天
Tutorial: Spin up Your Kubernetes-in-Docker Cluster and They Will Come - Conjur
Kind cluster - The Kubebuilder Book
google cloud platform - How to stop a kubernetes cluster? - Stack Overflow
kind cluster stop and start · Issue #831 · kubernetes-sigs/kind
New command: kube stop cluster and kube start cluster · Issue #1867 · kubernetes-sigs/kind
[Update 2022/06] 用 podman 跑 KinD：這樣就變成 KinP 惹
使用podman和kind建立k8s測試環境 – Le murmure de Julian
Local Kubernetes setup with KinD on Podman - Daniel's Tech Blog
Create Kubernetes clusters with Kind, rootless Docker and rootless Podman – mohitgoyal.co
Kind with Podman on Ubuntu 20.04.LTS | LinkedIn
kind – Rootless
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