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Ansible Dresden meetup (Dec 2019) - How Operators with Ansible make Kubernetes Sing
- 1. How Operators with Ansible make Kubernetes Sing Carol Chen Senior Community Architect Twitter/Github/freenode IRC: @cybette
- 2. The Ansible Operator SDK makes it easier to deploy and manage Kubernetes applications with native Ansible support
- 3. What is Kubernetes? An open source orchestration system for implementing a microservices architecture as containerized applications run and coordinated across a cluster of nodes. Red Hat® OpenShift® is a comprehensive enterprise-grade application platform built for containers with Kubernetes at its core. Kubernetes Operators with Ansible
- 4. Stateless is easy, Stateful is hard
- 5. ● Encode human operational knowledge ● Automatically patch, upgrade, recover, and tune container-based apps and services ● Kubernetes-native ● Purpose-built for a specific application or service ● Enable “day 2” management Kubernetes Operators with Ansible Kubernetes Operators Operators simplify management of complex applications on Kubernetes
- 6. Encoding and automating Ops knowledge WITH OPERATORS: PROACTIVE Continually adjusts to optimal state Automatically acts in milliseconds WITHOUT OPERATORS: REACTIVE Continually checks for anomalies Alert humans for response Requires manual change to fix Kubernetes Operators with Ansible
- 7. Making it easier to deploy and manage Kubernetes apps in an Ansible-native way Ansible Operator SDK Kubernetes Operators with Ansible Use the Operator SDK to create a new skeleton Operator. operator-sdk new Add Ansible Content Use Ansible Roles and playbooks to manage lifecycle events for your containerized applications. operator-sdk build Use the Operator SDK to build and deploy your Operator to Kubernetes.
- 8. EXISTING SKILLS & ECOSYSTEM Same tried & trusted Ansible tooling Utilize existing skills Supports cloud-native & traditional IT automation with one simple language Leverages vibrant existing ecosystem Why build Operators with Ansible? LOWER BARRIER OF ENTRY No programming required Faster iterations and easier maintenance Declarative state definitions like K8s Templating of resources Abstraction layer & helpers that reduces necessary K8s API experience Kubernetes Operators with Ansible
- 9. Developing your first Operator with Ansible ● Initialize Your Operator With Ansible ○ $ operator-sdk new foo-operator --api-version=cache.example.com/v1alpha1 --kind=Foo --type=ansible ● Automate With Ansible ○ Create new roles and playbooks or reuse an existing one ● Define a watches file ○ Map a Kubernetes object to your Ansible content ● Build Your Operator ○ $ operator-sdk build foo-operator:v0.0.1 ● Deploy Your Operator to a Kubernetes Cluster Kubernetes Operators with Ansible
- 10. Get started with Ansible: Get started with Operators: ansible.com/get-started ansible.com/community github.com/operator-framework/getting-started ansible.com/operators Next steps Deep Dive with Ansible Operators: ansible.com/blog/kubernetes-operators-ansible-deep-dive-part-1 ansible.com/blog/kubernetes-operators-ansible-deep-dive-part-2
- 11. More resources ● Ansible Operator Interactive Learning: learn.openshift.com/ansibleop ● Operator Hub: operatorhub.io ● Submit Your Operator: github.com/operator-framework/community-operators ● Operator Framework Mailing List: groups.google.com/forum/#!forum/operator-framework
- 12. etcd Operator A great example of a sophisticated Kubernetes Operator using Ansible: github.com/water-hole/etcd-ansible-operator Memcached Operator Simple walkthrough for building an Operators using the Ansible Operator SDK and Kubernetes CRDs github.com/operator-framework/operator-sdk-sample s/tree/master/memcached-operator More resources