Kubernetes : Configure Manager Node2023/10/19 |
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. +----------------------+ +----------------------+ | [ mgr.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] | Configure Manager Node first. |
[root@mgr ~]#
dnf -y install nginx nginx-mod-stream
[root@mgr ~]#
vi /etc/nginx/nginx.conf server { # line 38 : change listening port listen 8080; listen [::]:8080; # add to the end : proxy settings stream { upstream k8s-api { server 10.0.0.30:6443; } server { listen 6443; proxy_pass k8s-api; } }[root@mgr ~]# systemctl enable --now nginx
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[2] | If SELinux is enabled, change policy like follows. |
[root@mgr ~]# setsebool -P httpd_can_network_connect on [root@mgr ~]# setsebool -P httpd_graceful_shutdown on [root@mgr ~]# setsebool -P httpd_can_network_relay on [root@mgr ~]# setsebool -P nis_enabled on [root@mgr ~]# semanage port -a -t http_port_t -p tcp 6443 |
[3] | If Firewalld is running, allow related services. |
[root@mgr ~]# firewall-cmd --add-service={kube-apiserver,http,https} success [root@mgr ~]# firewall-cmd --runtime-to-permanent success |
[4] | On Manager Node, Install Kubernetes client. Replace the version number with the one you want to install. |
[root@mgr ~]# cat <<'EOF' > /etc/yum.repos.d/kubernetes.repo
[root@mgr ~]# [kubernetes] name=Kubernetes baseurl=https://pkgs.k8s.io/core:/stable:/v1.30/rpm/ enabled=0 gpgcheck=1 gpgkey=https://pkgs.k8s.io/core:/stable:/v1.30/rpm/repodata/repomd.xml.key EOF dnf --enablerepo=kubernetes -y install kubectl
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