Quickly deploy kubernetes high-availability cluster with ansible based on kubeadm tool
- os: centos 7.x
| Host Name | Role | Size | Software list |
|---|---|---|---|
| etcd-1 | Etcd node 1 | 2C 1G | etcd |
| ectd-2 | Etcd node 2 | 2C 1G | etcd |
| ectd-3 | Etcd node 3 | 2C 1G | etcd |
| k8s-lb-1 | Load balancer primary node | 2C 0.5G | haproxy keepalived |
| k8s-lb-2 | Load balancer backup node | 2C 0.5G | haproxy keepalived |
| k8s-master-1 | Control node 1 | 4C 2G | docker, kubelet, kubeadm, ipvsadm |
| k8s-master-2 | Control node 2 | 4C 2G | docker, kubelet, kubeadm, ipvsadm |
| k8s-master-3 | Control node 3 | 4C 2G | docker, kubelet, kubeadm, ipvsadm |
| k8s-worker-1 | Work node 1 | 4C 8G | docker, kubelet, kubeadm, ipvsadm |
In production environment, more backup nodes for LB and more work nodes can be added as per above table.
Make sure all the nodes can be sshed via root without password authentication.
Once the nodes have been provisioned. Manually modify the ip address in 00_set_local_hosts.yml and 01_set-hosts.yml.
Ansible will help configure hosts files on local ansible host and target machines. If you have already added hostname
and ip mapping into /etc/hosts on local ansible host, skip playbook 00_set_local_hosts.yml