Kubernetes : Install Kubeadm2024/06/07 |
Configure Multi Nodes Kubernetes Cluster. This example is based on the environment like follows.
For System requirements, each Node has unique Hostname, MAC address, Product_uuid. +----------------------+ +----------------------+ | [ ctrl.srv.world ] | | [ dlp.srv.world ] | | Manager Node | | Control Plane | +-----------+----------+ +-----------+----------+ eth0|10.0.0.25 eth0|10.0.0.30 | | ------------+--------------------------+----------- | | eth0|10.0.0.51 eth0|10.0.0.52 +-----------+----------+ +-----------+----------+ | [ node01.srv.world ] | | [ node02.srv.world ] | | Worker Node#1 | | Worker Node#2 | +----------------------+ +----------------------+ |
[1] | On all Kubernetes Cluster Nodes except Manager Node, Change settings for System requirements. |
root@dlp:~#
root@dlp:~# apt -y install containerd mkdir /etc/containerd root@dlp:~# containerd config default | tee /etc/containerd/config.toml
root@dlp:~#
vi /etc/containerd/config.toml # line 65 : change sandbox_image = "registry.k8s.io/pause:3.9" # line 137 : change SystemdCgroup = true
root@dlp:~#
systemctl restart containerd.service
root@dlp:~#
cat > /etc/sysctl.d/99-k8s-cri.conf <<EOF
net.bridge.bridge-nf-call-iptables=1 net.bridge.bridge-nf-call-ip6tables=1 net.ipv4.ip_forward=1 EOF
root@dlp:~#
sysctl --system
root@dlp:~#
modprobe overlay; modprobe br_netfilter root@dlp:~# echo -e overlay\\nbr_netfilter > /etc/modules-load.d/k8s.conf
# switch to [iptables-legacy] for iptables backend root@dlp:~# update-alternatives --config iptables
There are 2 choices for the alternative iptables (providing /usr/sbin/iptables).
Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/sbin/iptables-nft 20 auto mode
1 /usr/sbin/iptables-legacy 10 manual mode
2 /usr/sbin/iptables-nft 20 manual mode
Press <enter> to keep the current choice[*], or type selection number: 1
update-alternatives: using /usr/sbin/iptables-legacy to provide /usr/sbin/iptables (iptables) in manual mode
# disable swap root@dlp:~# swapoff -a
root@dlp:~#
vi /etc/fstab # comment out #/swap.img none swap sw 0 0 # disable apparmor profiles below root@dlp:~# apparmor_parser -R /etc/apparmor.d/runc root@dlp:~# apparmor_parser -R /etc/apparmor.d/crun root@dlp:~# ln -s /etc/apparmor.d/runc /etc/apparmor.d/disable/ root@dlp:~# ln -s /etc/apparmor.d/crun /etc/apparmor.d/disable/ |
[2] | On all Kubernetes Cluster Nodes except Manager Node, Install required packages. |
root@dlp:~#
root@dlp:~# curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.30/deb/Release.key | gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg root@dlp:~# echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.30/deb/ /" | tee /etc/apt/sources.list.d/kubernetes.list
apt update root@dlp:~# apt -y install kubeadm kubelet kubectl
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