K8s 安装

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阿奔（讨论 | 贡献）2024年3月26日 (二) 15:19的版本 （→‎Node）
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环境准备

  • 关闭 selinux 及 firewalld
  • 关闭 Swap

host

192.168.0.158   np0
192.168.0.229   np1
192.168.0.249   np2
192.168.0.148   np3

设置网桥参数

cat << EOF > /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
user.max_user_namespaces=28633
EOF

sysctl -p /etc/sysctl.d/99-kubernetes-cri.conf

配置支持 IPVS

加载 ip_vs 内核模块。kube-proxy 通过采用 iptables + ipset + ipvs 的方式实现为符合条件的 Pod 提供负载均衡。否则 kube-proxy 会退回到 iptables 模式。 

cat > /etc/modules-load.d/ip_vs.conf << EOF 
ip_vs
ip_vs_rr
ip_vs_wrr
ip_vs_sh
nf_conntrack_ipv4
EOF

modprobe ip_vs
modprobe ip_vs_rr
modprobe ip_vs_wrr
modprobe ip_vs_sh
modprobe nf_conntrack_ipv4

导入模块

cat << EOF > /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF

modprobe overlay
modprobe br_netfilter

lsmod | grep overlay
lsmod | grep br_netfilter

部署 Containerd

创建容器工具

wget https://github.com/opencontainers/runc/releases/download/v1.1.4/runc.amd64
install -m 755 runc.amd64 /usr/local/sbin/runc

容器间网络通信

wget https://github.com/containernetworking/plugins/releases/download/v1.2.0/cni-plugins-linux-amd64-v1.2.0.tgz
mkdir -p /opt/cni/bin
tar Cxzvf /opt/cni/bin cni-plugins-linux-amd64-v1.2.0.tgz

Containerd

wget https://github.com/containerd/containerd/releases/download/v1.7.14/containerd-1.7.14-linux-amd64.tar.gz
tar Cxzvf /usr/local containerd-1.7.14-linux-amd64.tar.gz

wget https://raw.githubusercontent.com/containerd/containerd/main/containerd.service -o /usr/lib/systemd/system/containerd.service
systemctl daemon-reload && systemctl enable containerd

mkdir /etc/containerd
containerd config default > /etc/containerd/config.toml

cd /etc/containerd/
cp config.toml config.toml.orig
vi config.toml
 [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]
    SystemdCgroup = true	# false 修改为 true
 [plugins."io.containerd.grpc.v1.cri"]
    # sandbox_image = "registry.k8s.io/pause:3.9"
    sandbox_image = "registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.9"
 [plugins."io.containerd.grpc.v1.cri".registry.mirrors]
  [plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]
    endpoint = ["http://mirrors.ustc.edu.cn"]
  [plugins."io.containerd.grpc.v1.cri".registry.mirrors."*"]
    endpoint = ["http://hub-mirror.c.163.com"]

systemctl restart containerd
netstat -nlput | grep containerd

kubernetes

repo

cat > /etc/yum.repos.d/kubernetes.repo << EOF
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

kubelet kubeadm kubectl

# yum list kubelet --showduplicates

yum install kubelet kubeadm kubectl
systemctl enable kubelet
systemctl status kubelet
此时状态不正常，等到 init 或 join 后，状态正常。

master

INIT

安装 calico 网络插件需要 pod-network-cidr 

kubeadm init \
--image-repository registry.aliyuncs.com/google_containers \
--kubernetes-version=1.28.2 \
--apiserver-advertise-address=192.168.0.249 \
--service-cidr=10.1.0.0/16 \
--pod-network-cidr=10.2.0.0/16
  • apiserver-advertise-address: master 主机 IP 地址
  • service-cidr: 内部 service 使用 IP 范围，不可与 pod 及 master 重复
  • pod-network-cidr: k8s pod 节点之间网络通信使用 IP 范围
Your Kubernetes control-plane has initialized successfully!

To start using your cluster, you need to run the following as a regular user:

  mkdir -p $HOME/.kube
  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
  sudo chown $(id -u):$(id -g) $HOME/.kube/config

Alternatively, if you are the root user, you can run:

  export KUBECONFIG=/etc/kubernetes/admin.conf

You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
  https://kubernetes.io/docs/concepts/cluster-administration/addons/

Then you can join any number of worker nodes by running the following on each as root:

kubeadm join 192.168.0.249:6443 --token z1q425.gy4kgpp491c8nkq2 --discovery-token-ca-cert-hash sha256:0b02fa4069856afb9d17dba76527b7e7c630d799cc3c00c3cc36c8beaec0128c
calico
wget https://raw.githubusercontent.com/projectcalico/calico/v3.25.0/manifests/calico.yaml
kubectl apply -f calico.yaml
kube-flannel
wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
修改 net-conf.json:Network 与 pod-network-cidr 保持一致。
  "Network": "10.2.0.0/16",

kubectl apply -f kube-flannel.yml

Node

kubeadm join 192.168.0.249:6443 --token z1q425.gy4kgpp491c8nkq2 --discovery-token-ca-cert-hash sha256:0b02fa4069856afb9d17dba76527b7e7c630d799cc3c00c3cc36c8beaec0128c


GUI

wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0/aio/deploy/recommended.yaml
kubectl apply -f recommended.yaml 
kubectl proxy --address=0.0.0.0 --port=18001 --accept-hosts='^*$' &

kubelet Guide

Create token

# Expires 24h
kubeadm token create --print-join-command

delete Node

  1. master

NODE=node3 kubectl drain ${NODE} --delete-local-data --force --ignore-daemonsets kubectl delete node ${NODE}

Node label

kubectl label node ${NODE} node-role.kubernetes.io/worker=worker
kubectl label node ${NODE} node-role.kubernetes.io/master=master
kubectl label node ${NODE} node-role.kubernetes.io/worker-

get Node

# ENV(master): scp /etc/kubernetes/admin.conf ${NODE}:/root/.kube/config
kubectl get cs
kubectl get node
kubectl describe node ${NODE}
kubectl get pods --all-namespaces

Error

node NotReady

kubectl apply -f calico.yaml
kubectl apply -f kube-flannel.yml

dorisfe1   NotReady   <none>                 8s     v1.28.2

registry.mirrors

即将删除的配置项

WARN[0000] DEPRECATION: The `mirrors` property of `[plugins."io.containerd.grpc.v1.cri".registry]` is deprecated since containerd v1.5 and will be removed in containerd v2.0. Use `config_path` instead.

kubectl get node

节点需要 /etc/kubernetes/admin.conf

E0325 16:13:46.489435   14081 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

crictl info

# /etc/crictl.yaml
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 2
debug: false
pull-image-on-create: false
disable-pull-on-run: false

E0326 10:15:02.860305    3920 remote_runtime.go:616] "Status from runtime service failed" err="rpc error: code = Unavailable desc = connection error: desc = \"transport: Error while dialing dial unix /var/run/dockershim.sock: connect: no such file or directory\""
取自“https://mwbbs.eu.org/wiki/index.php?title=K8s_安装&oldid=2163”