下载k3sup
代码语言：javascript复制[root@centos9 ~]# curl -sLS https://get.k3sup.dev | shx86_64
Downloading package https://github.com/alexellis/k3sup/releases/download/0.12.0/k3sup as /tmp/k3sup
Download complete.
Running with sufficient permissions to attempt to move k3sup to /usr/local/bin
New version of k3sup installed to /usr/local/bin
_ _____
| | _|___ / ___ _ _ _ __
| |/ / |_ / __| | | | '_
| < ___) __ |_| | |_) |
|_|_____/|___/__,_| .__/
|_|
Version: 0.12.0
Git Commit: c59d67b63ec76d5d5e399808cf4b11a1e02ddbc8
Give your support to k3sup via GitHub Sponsors:
https://github.com/sponsors/alexellis
================================================================
Thanks for choosing k3sup.
Support the project through GitHub Sponsors
https://github.com/sponsors/alexellis
================================================================
[root@centos9 ~]# ls
anaconda-ks.cfg cmss-gerrit go my-github origin
[root@centos9 ~]# sudo install k3sup /usr/local/bin/
install: cannot stat 'k3sup': No such file or directory
[root@centos9 ~]# k3sup
_ _____
| | _|___ / ___ _ _ _ __
| |/ / |_ / __| | | | '_ | < ___) __ |_| | |_) ||_|_____/|___/__,_| .__/
|_| Usage:
k3sup [flags]
k3sup [command]Available Commands:
completion Generate the autocompletion script for the specified shell help Help about any command
install Install k3s on a server via SSH join Install the k3s agent on a remote host and join it to an existing server
update Print update instructions
version Print the version
Flags:
-h, --help help for k3sup
Use "k3sup [command] --help" for more information about a command.用k3sup部署k3s
代码语言：javascript复制[root@centos9 ~]# k3sup install --localRunning: k3sup install2022/08/25 14:05:09 127.0.0.1
Executing: curl -sfL https://get.k3s.io | INSTALL_K3S_EXEC='server --tls-san 127.0.0.1' INSTALL_K3S_CHANNEL='stable' sh -[INFO] Finding release for channel stable[INFO] Using v1.24.3 k3s1 as release[INFO] Downloading hash https://github.com/k3s-io/k3s/releases/download/v1.24.3 k3s1/sha256sum-amd64.txt[INFO] Downloading binary https://github.com/k3s-io/k3s/releases/download/v1.24.3 k3s1/k3s[INFO] Verifying binary download[INFO] Installing k3s to /usr/local/bin/k3s
Rancher K3s Common (stable) 182 B/s | 2.0 kB 00:11
Last metadata expiration check: 0:00:04 ago on Thu 25 Aug 2022 02:05:30 PM CST.
Dependencies resolved.================================================================================
Package Arch Version Repository Size================================================================================Installing:
k3s-selinux noarch 1.2-2.el8 rancher-k3s-common-stable 20 k
Transaction Summary================================================================================Install 1 Package
Total download size: 20 k
Installed size: 94 k
Downloading Packages:
k3s-selinux-1.2-2.el8.noarch.rpm 23 kB/s | 20 kB 00:00
--------------------------------------------------------------------------------
Total 23 kB/s | 20 kB 00:00
Rancher K3s Common (stable) 4.9 kB/s | 2.4 kB 00:00
Importing GPG key 0xE257814A:
Userid : "Rancher (CI) <ci@rancher.com>"
Fingerprint: C8CF F216 4551 26E9 B9C9 18BE 925E A29A E257 814A
From : https://rpm.rancher.io/public.key
Key imported successfully
Running transaction check
Transaction check succeeded.
Running transaction testTransaction test succeeded.
Running transaction
Preparing : 1/1
Running scriptlet: k3s-selinux-1.2-2.el8.noarch 1/1
Installing : k3s-selinux-1.2-2.el8.noarch 1/1
Running scriptlet: k3s-selinux-1.2-2.el8.noarch 1/1uavc: op=load_policy lsm=selinux seqno=3 res=1
Verifying : k3s-selinux-1.2-2.el8.noarch 1/1
Installed:
k3s-selinux-1.2-2.el8.noarch
Complete![INFO] Skipping /usr/local/bin/kubectl symlink to k3s, command exists in PATH at /usr/bin/kubectl[INFO] Creating /usr/local/bin/crictl symlink to k3s[INFO] Creating /usr/local/bin/ctr symlink to k3s[INFO] Creating killall script /usr/local/bin/k3s-killall.sh[INFO] Creating uninstall script /usr/local/bin/k3s-uninstall.sh[INFO] env: Creating environment file /etc/systemd/system/k3s.service.env[INFO] systemd: Creating service file /etc/systemd/system/k3s.service[INFO] systemd: Enabling k3s unit
Created symlink /etc/systemd/system/multi-user.target.wants/k3s.service → /etc/systemd/system/k3s.service.[INFO] systemd: Starting k3s
stderr: "Importing GPG key 0xE257814A:n Userid : "Rancher (CI) <ci@rancher.com>"n Fingerprint: C8CF F216 4551 26E9 B9C9 18BE 925E A29A E257 814An From : https://rpm.rancher.io/public.keynuavc: op=load_policy lsm=selinux seqno=3 res=1Created symlink /etc/systemd/system/multi-user.target.wants/k3s.service → /etc/systemd/system/k3s.service.n"stdout: "[INFO] Finding release for channel stablen[INFO] Using v1.24.3 k3s1 as releasen[INFO] Downloading hash https://github.com/k3s-io/k3s/releases/download/v1.24.3 k3s1/sha256sum-amd64.txtn[INFO] Downloading binary https://github.com/k3s-io/k3s/releases/download/v1.24.3 k3s1/k3sn[INFO] Verifying binary downloadn[INFO] Installing k3s to /usr/local/bin/k3snRancher K3s Common (stable) 182 B/s | 2.0 kB 00:11 nLast metadata expiration check: 0:00:04 ago on Thu 25 Aug 2022 02:05:30 PM CST.nDependencies resolved.n================================================================================n Package Arch Version Repository Sizen================================================================================nInstalling:n k3s-selinux noarch 1.2-2.el8 rancher-k3s-common-stable 20 knnTransaction Summaryn================================================================================nInstall 1 PackagennTotal download size: 20 knInstalled size: 94 knDownloading Packages:nk3s-selinux-1.2-2.el8.noarch.rpm 23 kB/s | 20 kB 00:00 n--------------------------------------------------------------------------------nTotal 23 kB/s | 20 kB 00:00 nRancher K3s Common (stable) 4.9 kB/s | 2.4 kB 00:00 nKey imported successfullynRunning transaction checknTransaction check succeeded.nRunning transaction testnTransaction test succeeded.nRunning transactionn Preparing : 1/1 n Running scriptlet: k3s-selinux-1.2-2.el8.noarch 1/1 n Installing : k3s-selinux-1.2-2.el8.noarch 1/1 n Running scriptlet: k3s-selinux-1.2-2.el8.noarch 1/1 n Verifying : k3s-selinux-1.2-2.el8.noarch 1/1 nnInstalled:n k3s-selinux-1.2-2.el8.noarch nnComplete!n[INFO] Skipping /usr/local/bin/kubectl symlink to k3s, command exists in PATH at /usr/bin/kubectln[INFO] Creating /usr/local/bin/crictl symlink to k3sn[INFO] Creating /usr/local/bin/ctr symlink to k3sn[INFO] Creating killall script /usr/local/bin/k3s-killall.shn[INFO] Creating uninstall script /usr/local/bin/k3s-uninstall.shn[INFO] env: Creating environment file /etc/systemd/system/k3s.service.envn[INFO] systemd: Creating service file /etc/systemd/system/k3s.servicen[INFO] systemd: Enabling k3s unitn[INFO] systemd: Starting k3sn"Saving file to: /root/kubeconfig# Test your cluster with:export KUBECONFIG=/root/kubeconfig
kubectl config set-context default
kubectl get node -o wide[root@centos9 ~]# export KUBECONFIG=/root/kubeconfig[root@centos9 ~]# kubectl config set-context defaultContext "default" modified.[root@centos9 ~]# kubectl get node -o wideNAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
centos9 Ready control-plane,master 38s v1.24.3 k3s1 192.168.190.130 <none> CentOS Stream 9 5.14.0-142.el9.x86_64 containerd://1.6.6-k3s1[root@centos9 ~]# kubectl get pod -ANAMESPACE NAME READY STATUS RESTARTS AGE
kube-system local-path-provisioner-7b7dc8d6f5-2mzjb 1/1 Running 0 5m10s
kube-system coredns-b96499967-tdbw4 1/1 Running 0 5m10s
kube-system metrics-server-668d979685-fhd8n 1/1 Running 0 5m10s
kube-system helm-install-traefik-crd-7s72z 0/1 Completed 0 5m10s
kube-system helm-install-traefik-c4r5v 0/1 Completed 0 5m10s
kube-system traefik-7cd4fcff68-97897 0/1 Running 0 35s
kube-system svclb-traefik-66c6ef70-m6pgz 2/2 Running 0 35sk3s的部署很简单，但用k3sup工具更快，特别是k3sup工具可以指定ip远程部署到任意一台远程的服务器或云主机上。
部署k8s和k3s上，对比用kind创建k8s集群，k3sup创建k3s集群是快多了。这个快也主要是因为k3s下载文件小多了，十分之一左右。但实际上k3s集群好了后还要执行些helm install软件包，到集群可用k3s会更慢些。
k3s直接部署和用k3sup工具部署命令对比
部署单节点server/agent命令对比
代码语言：javascript复制curl -sfL https://get.k3s.io | sh -# Check for Ready node, takes maybe 30 secondskubectl get node -o wide
kubectl get pod -Ak3sup install --ip $SERVER_IP --user $USERkubectl get node -o wide
kubectl get pod -Aagent join server命令对比
代码语言：javascript复制# 下载k3s - 最新版本, 支持x86_64, ARMv7, and ARM64 # 运行k3s serversudo k3s server &# Kubeconfig is written to /etc/rancher/k3s/k3s.yamlsudo k3s kubectl get node# On a different node run the below. NODE_TOKEN comes from /var/lib/rancher/k3s/server/node-token# on your serversudo k3s agent --server https://myserver:6443 --token ${NODE_TOKEN}kubectl get node -o wide
kubectl get pod -A#Install the first serverk3sup install --user root --ip $SERVER1 --datastore="${DATASTORE}" --token=${TOKEN}#Install the second serverk3sup install --user root --ip $SERVER2 --datastore="${DATASTORE}" --token=${TOKEN}#Join the first agent#You can join the agent to either server, the datastore is not required for this step.k3sup join --user root --server-ip $SERVER1 --ip $AGENT1kubectl get node -o wide
kubectl get pod -A卸载 K3s
如果您使用安装脚本安装了 K3s，那么在安装过程中会生成一个卸载 K3s 的脚本。
要从 server 节点卸载 K3s，请运行：
/usr/local/bin/k3s-uninstall.sh
要从 agent 节点卸载 K3s，请运行：
/usr/local/bin/k3s-agent-uninstall.sh
简单使用
创建挂载 local-path 存储的 pod
代码语言：javascript复制[root@centos9 tt]# cat pvc.yaml apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: local-path-pvc
namespace: default
spec:
accessModes:
- ReadWriteOnce
storageClassName: local-path
resources:
requests:
storage: 2Gi[root@centos9 tt]# cat pod.yaml apiVersion: v1
kind: Pod
metadata:
name: volume-test
namespace: default
spec:
containers:
- name: volume-test
image: nginx:stable-alpine
imagePullPolicy: IfNotPresent
volumeMounts:
- name: volv
mountPath: /data
ports:
- containerPort: 80
volumes:
- name: volv
persistentVolumeClaim:
claimName: local-path-pvc[root@centos9 tt]# kubectl create -f pvc.yamlpersistentvolumeclaim/local-path-pvc created[root@centos9 tt]# kubectl create -f pod.yaml pod/volume-test created[root@centos9 tt]# kubectl get pod -ANAMESPACE NAME READY STATUS RESTARTS AGE
kube-system coredns-b96499967-x277m 1/1 Running 0 2m6s
kube-system local-path-provisioner-7b7dc8d6f5-qxscd 1/1 Running 0 2m6s
kube-system metrics-server-668d979685-k7wl7 1/1 Running 0 2m6s
kube-system helm-install-traefik-crd-2lt5l 0/1 Completed 0 2m6s
kube-system helm-install-traefik-zm77d 0/1 Completed 1 2m6s
kube-system svclb-traefik-089ff14b-pf7b9 2/2 Running 0 56s
kube-system traefik-7cd4fcff68-ddr6q 0/1 Running 0 56s
default volume-test 1/1 Running 0 85s[root@centos9 tt]# kubectl get podNAME READY STATUS RESTARTS AGE
volume-test 1/1 Running 0 94s创建挂载 longhorn 存储的 pod
代码语言：javascript复制[root@centos9 tt]# kubectl apply -f https://raw.githubusercontent.com/longhorn/longhorn/master/deploy/longhorn.yamlnamespace/longhorn-system created
Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21 , unavailable in v1.25
podsecuritypolicy.policy/longhorn-psp created
serviceaccount/longhorn-service-account created
configmap/longhorn-default-setting created
configmap/longhorn-storageclass created
customresourcedefinition.apiextensions.k8s.io/backingimagedatasources.longhorn.io created
customresourcedefinition.apiextensions.k8s.io/backingimagemanagers.longhorn.io created
customresourcedefinition.apiextensions.k8s.io/backingimages.longhorn.io created
customresourcedefinition.apiextensions.k8s.io/backups.longhorn.io created
customresourcedefinition.apiextensions.k8s.io/backuptargets.longhorn.io created
customresourcedefinition.apiextensions.k8s.io/backupvolumes.longhorn.io created
customresourcedefinition.apiextensions.k8s.io/engineimages.longhorn.io created
customresourcedefinition.apiextensions.k8s.io/engines.longhorn.io created
customresourcedefinition.apiextensions.k8s.io/instancemanagers.longhorn.io created
customresourcedefinition.apiextensions.k8s.io/nodes.longhorn.io created
customresourcedefinition.apiextensions.k8s.io/orphans.longhorn.io created
customresourcedefinition.apiextensions.k8s.io/recurringjobs.longhorn.io created
customresourcedefinition.apiextensions.k8s.io/replicas.longhorn.io created
customresourcedefinition.apiextensions.k8s.io/settings.longhorn.io created
customresourcedefinition.apiextensions.k8s.io/sharemanagers.longhorn.io created
customresourcedefinition.apiextensions.k8s.io/snapshots.longhorn.io created
customresourcedefinition.apiextensions.k8s.io/volumes.longhorn.io created
clusterrole.rbac.authorization.k8s.io/longhorn-role created
clusterrolebinding.rbac.authorization.k8s.io/longhorn-bind created
role.rbac.authorization.k8s.io/longhorn-psp-role created
rolebinding.rbac.authorization.k8s.io/longhorn-psp-binding created
service/longhorn-backend created
service/longhorn-frontend created
service/longhorn-conversion-webhook created
service/longhorn-admission-webhook created
service/longhorn-engine-manager created
service/longhorn-replica-manager created
daemonset.apps/longhorn-manager created
deployment.apps/longhorn-driver-deployer created
deployment.apps/longhorn-ui created
deployment.apps/longhorn-conversion-webhook created
deployment.apps/longhorn-admission-webhook created[root@centos9 tt]# kubectl get pod -ANAMESPACE NAME READY STATUS RESTARTS AGE
kube-system coredns-b96499967-x277m 1/1 Running 0 38m
kube-system local-path-provisioner-7b7dc8d6f5-qxscd 1/1 Running 0 38m
kube-system metrics-server-668d979685-k7wl7 1/1 Running 0 38m
kube-system helm-install-traefik-crd-2lt5l 0/1 Completed 0 38m
kube-system helm-install-traefik-zm77d 0/1 Completed 1 38m
kube-system svclb-traefik-089ff14b-pf7b9 2/2 Running 0 37m
kube-system traefik-7cd4fcff68-ddr6q 1/1 Running 0 37m
longhorn-system longhorn-conversion-webhook-7b98d5c6cf-kjh9b 1/1 Running 0 33m
longhorn-system longhorn-conversion-webhook-7b98d5c6cf-g2q5v 1/1 Running 0 33m
longhorn-system longhorn-admission-webhook-6df4465d84-574qs 1/1 Running 0 33m
longhorn-system longhorn-admission-webhook-6df4465d84-tl6gh 1/1 Running 0 33m
longhorn-system longhorn-manager-j5n4z 1/1 Running 0 33m
longhorn-system longhorn-driver-deployer-7cc677fb4f-zqxdg 1/1 Running 0 33m
longhorn-system csi-resizer-7c5bb5fd65-mx9b2 1/1 Running 0 29m
longhorn-system csi-resizer-7c5bb5fd65-xxrpv 1/1 Running 0 29m
longhorn-system csi-resizer-7c5bb5fd65-xknnl 1/1 Running 0 29m
longhorn-system longhorn-csi-plugin-r4fqz 2/2 Running 0 29m
longhorn-system csi-attacher-dcb85d774-w8j24 1/1 Running 0 29m
longhorn-system csi-attacher-dcb85d774-9c4cc 1/1 Running 0 29m
longhorn-system csi-attacher-dcb85d774-rnglx 1/1 Running 0 29m
longhorn-system csi-provisioner-5d8dd96b57-zq57d 1/1 Running 0 29m
longhorn-system csi-provisioner-5d8dd96b57-dqdnf 1/1 Running 0 29m
longhorn-system csi-provisioner-5d8dd96b57-pkpwq 1/1 Running 0 29m
longhorn-system longhorn-ui-6bf766d6d6-jp79l 1/1 Running 0 28m
longhorn-system csi-snapshotter-5586bc7c79-7zdzv 1/1 Running 0 29m
longhorn-system csi-snapshotter-5586bc7c79-g4w4b 1/1 Running 0 29m
longhorn-system csi-snapshotter-5586bc7c79-nfcd7 1/1 Running 0 29m
longhorn-system engine-image-ei-b907910b-flzfw 1/1 Running 0 29m
longhorn-system instance-manager-r-a3c8b5e8 1/1 Running 0 15m
longhorn-system instance-manager-e-615fda27 1/1 Running 0 11m[root@centos9 tt]# cat pvc.yaml apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: longhorn-volv-pvc
spec:
accessModes:
- ReadWriteOnce
storageClassName: longhorn
resources:
requests:
storage: 2Gi[root@centos9 tt]# cat pod.yaml apiVersion: v1
kind: Pod
metadata:
name: volume-test
namespace: default
spec:
containers:
- name: volume-test
image: nginx:stable-alpine
imagePullPolicy: IfNotPresent
volumeMounts:
- name: volv
mountPath: /data
ports:
- containerPort: 80
volumes:
- name: volv
persistentVolumeClaim:
claimName: longhorn-volv-pvc[root@centos9 tt]# kubectl create -f pvc.yaml persistentvolumeclaim/longhorn-volv-pvc created[root@centos9 tt]# kubectl get pvcNAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
longhorn-volv-pvc Bound pvc-7b491458-267d-4359-a078-5cc270a2bb5f 2Gi RWO longhorn 5s[root@centos9 tt]# kubectl get pvNAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
pvc-7b491458-267d-4359-a078-5cc270a2bb5f 2Gi RWO Delete Bound default/longhorn-volv-pvc longhorn 5s[root@centos9 tt]# kubectl create -f pod.yaml pod/volume-test created[root@centos9 tt]# kubectl get podNAME READY STATUS RESTARTS AGE
volume-test 1/1 Running 0 23s
