目录：（可以按w快捷键切换大纲视图）
下载k3sup
[root@centos9 ~]# curl -sLS https://get.k3sup.dev | sh
x86_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
_ _____
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| |/ / |_ \/ __| | | | '_ \
| < ___) \__ \ |_| | |_) |
|_|\_\____/|___/\__,_| .__/
|_|
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
[root@centos9 ~]# k3sup install --local
Running: k3sup install
2022/08/25 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 test
Transaction 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 814A\n From : https://rpm.rancher.io/public.key\nuavc: 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 stable\n[INFO] Using v1.24.3+k3s1 as release\n[INFO] Downloading hash https://github.com/k3s-io/k3s/releases/download/v1.24.3+k3s1/sha256sum-amd64.txt\n[INFO] Downloading binary https://github.com/k3s-io/k3s/releases/download/v1.24.3+k3s1/k3s\n[INFO] Verifying binary download\n[INFO] Installing k3s to /usr/local/bin/k3s\nRancher 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 Size\n================================================================================\nInstalling:\n k3s-selinux noarch 1.2-2.el8 rancher-k3s-common-stable 20 k\n\nTransaction Summary\n================================================================================\nInstall 1 Package\n\nTotal download size: 20 k\nInstalled size: 94 k\nDownloading 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 successfully\nRunning transaction check\nTransaction check succeeded.\nRunning transaction test\nTransaction test succeeded.\nRunning transaction\n 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 \n\nInstalled:\n k3s-selinux-1.2-2.el8.noarch \n\nComplete!\n[INFO] Skipping /usr/local/bin/kubectl symlink to k3s, command exists in PATH at /usr/bin/kubectl\n[INFO] Creating /usr/local/bin/crictl symlink to k3s\n[INFO] Creating /usr/local/bin/ctr symlink to k3s\n[INFO] Creating killall script /usr/local/bin/k3s-killall.sh\n[INFO] Creating uninstall script /usr/local/bin/k3s-uninstall.sh\n[INFO] env: Creating environment file /etc/systemd/system/k3s.service.env\n[INFO] systemd: Creating service file /etc/systemd/system/k3s.service\n[INFO] systemd: Enabling k3s unit\n[INFO] systemd: Starting k3s\n"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 default
Context "default" modified.
[root@centos9 ~]# kubectl get node -o wide
NAME 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 -A
NAMESPACE 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
curl -sfL https://get.k3s.io | sh -
# Check for Ready node, takes maybe 30 seconds
kubectl get node -o wide
kubectl get pod -Ak3sup install --ip $SERVER_IP --user $USER
kubectl get node -o wide
kubectl get pod -Aagent join server命令对比
# 下载k3s - 最新版本, 支持x86_64, ARMv7, and ARM64
# 运行k3s server
sudo k3s server &
# Kubeconfig is written to /etc/rancher/k3s/k3s.yaml
sudo k3s kubectl get node
# On a different node run the below. NODE_TOKEN comes from /var/lib/rancher/k3s/server/node-token
# on your server
sudo k3s agent --server https://myserver:6443 --token ${NODE_TOKEN}
kubectl get node -o wide
kubectl get pod -A#Install the first server
k3sup install --user root --ip $SERVER1 --datastore="${DATASTORE}" --token=${TOKEN}
#Install the second server
k3sup 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 $AGENT1
kubectl 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
[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.yaml
persistentvolumeclaim/local-path-pvc created
[root@centos9 tt]# kubectl create -f pod.yaml
pod/volume-test created
[root@centos9 tt]# kubectl get pod -A
NAMESPACE 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 pod
NAME READY STATUS RESTARTS AGE
volume-test 1/1 Running 0 94s创建挂载 longhorn 存储的 pod
[root@centos9 tt]# kubectl apply -f https://raw.githubusercontent.com/longhorn/longhorn/master/deploy/longhorn.yaml
namespace/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 -A
NAMESPACE 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 pvc
NAME 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 pv
NAME 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 pod
NAME READY STATUS RESTARTS AGE
volume-test 1/1 Running 0 23s转载请注明来源，欢迎指出任何有错误或不够清晰的表达。可以邮件至 backendcloud@gmail.com
