AlmaLinux 9上安装Kubernetes 1.25集群

0. 确认Linux版本

uname -a
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1. 禁用swap

sudo swapoff -a
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2. 禁用防火墙

sudo systemctl stop firewalld
sudo systemctl disable firewalld
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3. 将SELinux设置为permissive模式

sudo setenforce 0
sudo sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
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4. 更新/etc/hosts

/etc/hosts中加入下面命令的输出结果

echo $(hostname -i) $(hostname -long)
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5. 安装podman, podman remotes, socat, runc, conmon

sudo dnf install -y podman podman-remote socat runc conmon
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启用 podman socket

sudo systemctl enable -- now podman.socket
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检查远程 podman-remote info 的显示信息

sudo podman-remote info
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6. 安装crio

sudo rpm -ivh https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable:/cri-o:/1.25:/1.25.1/Fedora_36/x86_64/cri-o-1.25.1-3.1.fc36.x86_64.rpm
sudo systemctl enable --now crio
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7. 安装kubelet kubeadm kubectl

cat <

8. 更新模块设置

cat <

对模块使用modprobe

sudo modprobe overlay
sudo modprobe br_netfilter
sudo modprobe ip_tables
sudo modprobe iptable_filter
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为 k8s.conf 设置 sysctl.d

cat <

应用 sysctl 参数，无需重启

sysctl --system
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9. 设置一个calico ignore并加载calicoctl

cat << EOF > /etc/NetworkManager/conf.d/calico.conf
[keyfile]
unmanaged-devices=interface-name:cali*;interface-name:tunl*;interface-name:vxlan.calico;interface-name:vxlan-v6.calico;interface-name:wireguard.cali;interface-name:wg-v6.cali
EOF
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下载和安装calicoctl

curl -L -o calicoctl https://github.com/projectcalico/calico/releases/download/v3.24.5/calicoctl-linux-amd64
chmod +x calicoctl
mv calicoctl /bin
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编辑 crio，添加最后两个值

vi /etc/crio/crio.conf
---
[crio.runtime]
conmon_cgroup = "pod"
cgroup_manager = "systemd"
---
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10. 初始化Kubernetes集群

kubeadm init --cri-socket=unix:///var/run/crio/crio.sock --pod-network-cidr=10.244.0.0/16
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11. 配置集群访问

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

kubectl taint nodes --all node-role.kubernetes.io/control-plane-

kubectl completion bash | sudo tee /etc/bash_completion.d/kubectl > /dev/null
echo 'alias k=kubectl' >>~/.bashrc
echo 'complete -o default -F __start_kubectl k' >>~/.bashrc
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12. 确认集群

kubectl get nodes
kubectl get pods -A
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完结！