Notes Kubernetes k8s - Install Node

Prérequis :

• Unique mac addresses et /sys/class/dmi/id/product_uuid
• Pas de swap

Voir :

• https://cyril.deguet.com/fr/2018/02/12/kubernetes-debian-vps/
• https://www.digitalocean.com/community/tutorials/how-to-create-a-kubernetes-cluster-using-kubeadm-on-debian-9
• https://gist.github.com/apokalyptik/99cefb3d2e16b9b0c3141e222f3267db
• https://www.server-world.info/en/note?os=Debian_10&p=kubernetes&f=3
• https://www.nuxeo.com/fr/blog/installing-kubernetes-moving-from-physical-servers-to-containers/

# generic
apt-get install -y yq vim atop tmux sudo
 
# for apt-get
apt-get install -y apt-transport-https ca-certificates curl gpg

A faire :

• Changer hostname
• Mettre à jour /etc/hosts
• Copier la clef SSH ssh-copy-id
• @ip /etc/network/interfaces.d/vlan100 ou netplan

apt-get install
apt-get install network-manager

/etc/netplan/00-network-manager.yaml

network:
  version: 2
  renderer: NetworkManager

Netplan avec NetworkManager bug -- Solution :

apt-get purge  '*netplan*'
systemctl disable --now systemd-networkd.service

chmod 600 /etc/netplan/00-network-manager.yaml
netplan try
netplan apply --debug
netplan apply
 
nmcli connection add con-name vlan100 ifname enp7s0 type ethernet ip4 192.168.100.21/24
nmcli connection up vlan100
 
hostnamectl hostname vmdeb01
 
#echo -e "$(hostname -I | awk '{print $2}')\t\t$(hostname)" >> /etc/hosts
echo "192.168.100.21  vmdeb01.local vmdeb01" >> /etc/hosts
echo "192.168.100.22  vmdeb02.local vmdeb02" >> /etc/hosts
 
apt-get install openssh-server
 
adduser admin
 
echo "admin ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers.d/admin

# sysctl params required by setup, params persist across reboots
cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
EOF
 
# Apply sysctl params without reboot
sudo sysctl --system

Vérif

sysctl net.ipv4.ip_forward

Source : https://kubernetes.io/docs/setup/production-environment/container-runtimes/#cgroup-drivers

groupadd -g 500000 dockremap
groupadd -g 501000 dockremap-user
useradd -u 500000 -g dockremap -s /bin/false dockremap
useradd -u 501000 -g dockremap-user -s /bin/false dockremap-user
 
echo "dockremap:500000:65536" >> /etc/subuid
echo "dockremap:500000:65536" >> /etc/subgid

useradd is a low level utility for adding users. On Debian, administrators should usually use adduser(8) instead.

/etc/docker/daemon.json

{
  "userns-remap": "default"
}

/etc/docker/daemon.json

{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2"
}

sudo update-alternatives --set iptables /usr/sbin/iptables-legacy
sudo update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy
sudo update-alternatives --set arptables /usr/sbin/arptables-legacy
sudo update-alternatives --set ebtables /usr/sbin/ebtables-legacy

systemctl restart docker.service