ansible-centos7-kubespray
Ansible playbook to configure prerequisites for Kubespray on CentOS7
Prerequisites for the CentOS7 machines:
- SSH access using password with a user who has root permissions (centos in example)
- A public key generated on your local machine
This playbook will:
- Update packages
- Install network tools
- Install and configure ntpd
- disable firewall
- disable swap
- enable passwordless sudo
- enable passwordless SSH
- set hostname
Add the IP's of your CentOS7 servers in the hosts.ini.
[all]
node1 ansible_host=192.168.140.101
node2 ansible_host=192.168.140.102
node3 ansible_host=192.168.140.103
Start the playbook. Define variables like root password, user, group and path to the public key.
$ ansible-playbook -i hosts.ini -u centos -k playbook.yml --extra-vars "ansible_sudo_pass=supersecret user=centos group=centos pubkeypath=~/.ssh/id_rsa.pub"
After running the playbook you can start with Kubespray:
$ git clone https://github.com/kubernetes-incubator/kubespray
$ cd kubespray
$ git checkout v2.7.0
Follow the instructions described in the README.md
# Install dependencies from ``requirements.txt``
$ sudo pip install -r requirements.txt
# Copy inventory/sample as inventory/mycluster
$ cp -rfp inventory/sample inventory/mycluster
# Update Ansible inventory file with inventory builder
$ declare -a IPS=(192.168.140.101 192.168.140.102 192.168.140.103)
$ CONFIG_FILE=inventory/mycluster/hosts.ini python3 contrib/inventory_builder/inventory.py ${IPS[@]}
# Review and change parameters under inventory/mycluster/group_var
$ cat inventory/mycluster/group_vars/all.yml
$ cat inventory/mycluster/group_vars/k8s-cluster.yml
# Optional: modify the hosts.ini file to your needs.
$ vi inventory/mycluster/hosts.ini
[all]
node1 ansible_host=192.168.140.101 ip=192.168.140.101
node2 ansible_host=192.168.140.102 ip=192.168.140.102
node3 ansible_host=192.168.140.103 ip=192.168.140.103
# possible to add additional masters
[kube-master]
node1
[kube-node]
node2
node3
# possible to add additional etcd's
[etcd]
node1
[k8s-cluster:children]
kube-node
kube-master
[calico-rr]
[vault]
node1
node2
node3
Deploy Kubespray with Ansible Playbook.
$ ansible-playbook -u centos -b -i inventory/mycluster/hosts.ini cluster.yml
More details and configuration can be found here.