Kubernetes : Kubeadm : Install2019/08/26 |
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Install Kubeadm to Configure Multi Nodes Kubernetes Cluster.
On this example, Configure This example is based on the emvironment like follows.
For System requirements, each Node has uniq Hostname, MAC address, Product_uuid.
MAC address and Product_uuid are generally already uniq one if you installed OS on phisical machine or virtual machine with common procedure. You can see Product_uuid with the command [dmidecode -s system-uuid].
-----------+---------------------------+--------------------------+------------
| | |
eth0|10.0.0.30 eth0|10.0.0.51 eth0|10.0.0.52
+----------+-----------+ +-----------+----------+ +-----------+----------+
| [ dlp.srv.world ] | | [ node01.srv.world ] | | [ node02.srv.world ] |
| Master Node | | Worker Node | | Worker Node |
+----------------------+ +----------------------+ +----------------------+
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First, Apply Common Settings on All Nodes.
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| [1] | |
| [2] | Change some settings on All Nodes for System requirements. For IPTables, Kubernetes v1.15 has not supported IPTables version 1.8 yet now (Aug 2019 now), so switch to IPTables Legacy on Debian 10. |
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root@dlp:~# swapoff -a
root@dlp:~#
vi /etc/fstab # comment out for swap line # /dev/mapper/ubuntu--vg-swap_1 none swap sw 0 0
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 # select IPTables Legacy 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 moderoot@dlp:~# cat > /etc/docker/daemon.json <<EOF
root@dlp:~# { "exec-opts": ["native.cgroupdriver=systemd"], "log-driver": "json-file", "log-opts": { "max-size": "100m" }, "storage-driver": "overlay2" } EOF systemctl restart docker |
| [3] | Install Kubeadm on All Nodes. |
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root@dlp:~#
root@dlp:~# apt -y install apt-transport-https gnupg2 curl curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add - OK
root@dlp:~#
echo "deb http://apt.kubernetes.io/ kubernetes-xenial main" | tee -a /etc/apt/sources.list.d/kubernetes.list root@dlp:~# apt update root@dlp:~# apt -y install kubeadm kubelet kubectl
# only enabling, do not run yet root@dlp:~# systemctl enable kubelet |
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