配置k3s一些记录

Matana111

1815人浏览 · 2024-10-27 12:40:10

Matana111 · 2024-10-27 12:40:10 发布

背景：

树莓派结点，想要实现数据传输、负载查看的功能。现在想用k3s构建集群+dashboard实现网页。第一次弄，记录一下。

过程：

第一步：编辑 `/boot/cmdline.txt`，在末尾添加 `cgroup_memory=1 cgroup_enable=memory。`

因为不配置下载时会报错，[INFO] Failed to find memory cgroup, you may need to add “cgroup_memory=1 cgroup_enable=memory” to your linux cmdline (/boot/cmdline.txt on a Raspberry Pi)

具体操作：

因为这个文件是默认不允许修改的，所以先进入root角色，命令为sudo su

vi /boot/cmdline.txt

输入i表示输入

粘贴可以用shift+右键，选择paste。

编辑完点esc键

输入:wq!，表示强制保存退出。

如果没有vim，就用nano控制

sudo nano /boot/cmdline.txt

cgroup_memory=1 cgroup_enable=memory

ctrl+o 保存，enter保存文件名，ctrl+x退出。

`第二步：因为只有windows能科学上网，其他树莓派用代理上网。参见`

NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system coredns-576bfc4dc7-zlsh8 0/1 ContainerCreating 0 5d5h
kube-system helm-install-traefik-6crzs 0/1 ContainerCreating 0 5d5h
kube-system helm-install-traefik-crd-nwqmj 0/1 ContainerCreating 0 5d5h
kube-system local-path-provisioner-6795b5f9d8-wnk4d 0/1 ContainerCreating 0 5d5h
kube-system metrics-server-557ff575fb-6jcjx 0/1 ContainerCreating 0 5d5h
kubernetes-dashboard dashboard-metrics-scraper-795895d745-l9llg 0/1 ContainerCreating 0 30h
kubernetes-dashboard kubernetes-dashboard-56cf4b97c5-d5szf 0/1 ContainerCreating 0 30h

究其原因：

failed to pull and unpack image "docker.io/rancher/mirrored-pause:3.6"

下载后会有镜像拉取失败。

第三步：使用国内镜像下载k3s

master下载命令：

curl -sfL https://rancher-mirror.rancher.cn/k3s/k3s-install.sh | INSTALL_K3S_MIRROR=cn K3S_KUBECONFIG_OUTPUT=/root/.kube/config sh -

（这里我看可以选择用docker做容器，我都没用过，所以没选）

添加worker节点：

1.在master节点输入

sudo cat /var/lib/rancher/k3s/server/node-token

获取token。

2.ssh进入worker节点，

curl -sfL https://rancher-mirror.rancher.cn/k3s/k3s-install.sh | INSTALL_K3S_MIRROR=cn K3S_URL=https://master在局域网的ip地址:6443 K3S_TOKEN=刚才获取到的token sh -

这里的https://rancher-mirror.rancher.cn/k3s/k3s-install.sh网址我是替换了可访问的，如果输入命令后没反应，大概就是网站无法访问。

worker节点加入后，在master节点输入k3s kubectl get node

NAME STATUS ROLES AGE VERSION
c1-0 Ready control-plane,master 6h8m v1.30.3+k3s1
c1-1-rpi3b-2 Ready <none> 29s v1.30.3+k3s1
c1-1-rpi4b-1 Ready <none> 4m57s v1.30.3+k3s1

第四步：使用kubectl get pods --all-namespaces报错，

E0807 22:24:59.741366 374505 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp [::1]:8080: connect: connection refused
E0807 22:24:59.742873 374505 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp [::1]:8080: connect: connection refused
E0807 22:24:59.744160 374505 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp [::1]:8080: connect: connection refused
E0807 22:24:59.745814 374505 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp [::1]:8080: connect: connection refused
E0807 22:24:59.748474 374505 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp [::1]:8080: connect: connection refused
The connection to the server localhost:8080 was refused - did you specify the right host or port?

1.用kubectl get nodes -v=10，使用 kubectl 命令行工具来获取 Kubernetes 集群中所有节点的详细信息
The connection to the server localhost:8080 was refused - did you specify the right host or port?
看到报的大概还是connection refused

2.kubectl config view，用于查看当前用户的 Kubernetes 配置信息的命令

apiVersion: v1
clusters: null
contexts: null
current-context: ""
kind: Config
preferences: {}
users: null

3.网上搜了stat /var/lib/rancher/k3s/server/node-token这个命令，not work。

mkdir /etc/rancher/k3s/

k3s.yaml
把master节点的， k3s.yaml传过来

把cluster里的

server: https://127.0.0.1:6443
改成

server: https://主机ip:6443

传文件命令：

scp /etc/rancher/k3s/k3s.yaml pi@192.168.1.8:/etc/rancher/k3s/
即为 scp 文件接受树莓派名@ip:路径

传输可能会遇到 Permission denied

原因是权限不够，

传输主机执行：chmod 777 /etc/rancher/k3s/k3s.yaml

接收主机执行：chmod 777 /etc/rancher/k3s/

常见命令：

1.卸载重新安装命令

master:

sh /usr/local/bin/k3s-uninstall.sh

node:

/usr/local/bin/k3s-agent-uninstall.sh

再安装好，此时输入k3s kubectl get node
NAME STATUS ROLES AGE VERSION
c1-0 Ready control-plane,master 4h51m v1.30.3+k3s1

下载dashboard：

这里没详细记录

root@c1-0:/home/work/k3s-dashboard# wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.7.0/aio/deploy/recommended.yaml
--2024-08-15 23:25:22-- https://raw.githubusercontent.com/kubernetes/dashboard/v2.7.0/aio/deploy/recommended.yaml
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 0.0.0.0, ::
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|0.0.0.0|:443... failed: Connection refused.
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|::|:443... failed: Connection refused.

[root@master ~]# vi /etc/hosts

185.199.110.133 raw.githubusercontent.com

root@c1-0:/home/work/k3s-dashboard# wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0/aio/deploy/recommended.yaml
--2024-08-15 23:28:31-- https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0/aio/deploy/recommended.yaml
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 185.199.110.133
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|185.199.110.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 7552 (7.4K) [text/plain]
Saving to: ‘recommended.yaml’

recommended.yaml 100%[=============================================================================================================================>] 7.38K 21.4KB/s in 0.3s

2024-08-15 23:28:32 (21.4 KB/s) - ‘recommended.yaml’ saved [7552/7552]

获取token

kubectl -n kubernetes-dashboard create token admin-user

http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/#/login

kubectl proxy

https://edu.csdn.net/learn/39067/627173?utm_source=2019755004

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