15 Useful Ansible Playbooks for Kubernetes Operations
Ansible, the powerful open-source automation tool, has become an indispensable asset for managing complex IT infrastructures. When it comes to orchestrating and automating tasks in Kubernetes environments, Ansible Playbooks emerge as a reliable solution. In this article, we'll delve into 15 incredibly useful Ansible Playbooks tailored for Kubernetes operations. Whether you're a seasoned DevOps engineer or just venturing into the world of Kubernetes, these playbooks will streamline your operations and enhance your workflow.
1. Installing Kubernetes Components
To kick off your Kubernetes automation journey, the first playbook focuses on installing essential components. Save this playbook as install_k8s_components.yml
:
- hosts: k8s_cluster
become: true
tasks:
- name: Install Docker
apt:
name: docker.io
state: present
- name: Install Kubernetes components
apt:
name: kubelet kubeadm kubectl
state: present
2. Setting Up a Kubernetes Cluster
Once you have the components installed, use the following playbook (setup_k8s_cluster.yml
) to initialize a Kubernetes cluster:
- hosts: master
become: true
tasks:
- name: Initialize Kubernetes Master
command: kubeadm init
3. Joining Nodes to the Cluster
Expanding the cluster is seamless with the playbook join_k8s_nodes.yml
:
- hosts: nodes
become: true
tasks:
- name: Join Node to Cluster
command: "{{ hostvars['master'].kubeadm_join_command.stdout }}"
4. Deploying Applications
Deploying applications is a breeze with this playbook (deploy_app.yml
):
- hosts: k8s_cluster
become: true
tasks:
- name: Deploy NGINX
k8s:
state: present
definition: nginx-deployment.yml
5. Scaling Deployments
Easily scale your deployments with the scale_app.yml
playbook:
- hosts: k8s_cluster
become: true
tasks:
- name: Scale NGINX Deployment
k8s_scale:
name: nginx-deployment
replicas: 3
6. Rolling Updates
Ensure seamless updates with rolling_update.yml
:
- hosts: k8s_cluster
become: true
tasks:
- name: Update NGINX Deployment
k8s:
state: reloaded
definition: nginx-deployment.yml
7. Configuring Persistent Storage
Handle persistent storage configurations effortlessly with persistent_storage.yml
:
- hosts: k8s_cluster
become: true
tasks:
- name: Create Persistent Volume
k8s:
state: present
definition: persistent-volume.yml
8. Backup and Restore
Safeguard your cluster data with backup_and_restore.yml
:
- hosts: master
become: true
tasks:
- name: Backup etcd
command: etcdctl snapshot save /tmp/snapshot.db
9. Managing Secrets
Securely manage secrets with manage_secrets.yml
:
- hosts: k8s_cluster
become: true
tasks:
- name: Create Secret
k8s:
state: present
definition: secret.yml
10. Network Policies
Implement network policies using network_policies.yml
:
- hosts: k8s_cluster
become: true
tasks:
- name: Apply Network Policy
k8s:
state: present
definition: network-policy.yml
11. Monitoring with Prometheus
Monitor your Kubernetes cluster with monitor_with_prometheus.yml
:
- hosts: k8s_cluster
become: true
tasks:
- name: Deploy Prometheus
k8s:
state: present
definition: prometheus-deployment.yml
12. Logging with Fluentd
Facilitate centralized logging with log_with_fluentd.yml
:
- hosts: k8s_cluster
become: true
tasks:
- name: Deploy Fluentd
k8s:
state: present
definition: fluentd-deployment.yml
13. Horizontal Pod Autoscaling
Automatically adjust your pod count with horizontal_pod_autoscaling.yml
:
- hosts: k8s_cluster
become: true
tasks:
- name: Apply Horizontal Pod Autoscaler
k8s:
state: present
definition: hpa.yml
14. Upgrading Kubernetes Version
Keep your cluster up-to-date with upgrade_k8s_version.yml
:
- hosts: k8s_cluster
become: true
tasks:
- name: Upgrade Kubernetes Version
command: kubeadm upgrade apply v1.x.y
15. Removing Kubernetes Cluster
When it's time to decommission, utilize remove_k8s_cluster.yml
:
- hosts: k8s_cluster
become: true
tasks:
- name: Reset Kubernetes Cluster
command: kubeadm reset -f
These Ansible Playbooks are just a glimpse into the powerful capabilities that automation can bring to Kubernetes operations. Feel free to customize and expand upon these playbooks to suit your specific needs.
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