stateful-gluster

A work in progress repo utilizing K8 Statefulsets with GlusterFS.

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Project 1: gluster-statefulset-cloud-aws

Goal

• Utilize latest upstream docker image for centos-gluster containers
• Develop all-in-one examples and various approaches on how best to take advantage of StatefulSets utilizing built-in Kubernetes primitives
• Phase 1.1 will be to use in cloud environment (AWS, GCE) and manage TSP.
• Phase 1.2 will be to use in cloud environment and manage TSP + Volumes and Bricks
• Phase 1.3 will be to use the solution with real pods/containers (show some examples and PoC)
• Phase 1.4 will be to explore other approaches and how to make more industrialized

Phase 1.1 Status - Initializing and Managing TSP

• Create running and healthy GlusterFS StatefulSet
• Create initial Trusted Storage Pool
• Happy Path - Scale Up and Down with Trusted Storage Pool intact
• Recovery - delete a pod, should recover
• Recovery - stop a node, pod should go to next available node with TSP intact
• Recovery - stop the cluster

Phase 1.2 Status - Phase 1 + Create Volumes and Bricks

• Create Trusted Storage Pool AND Initial Volume with Bricks
• Verify replication is working on initial GFS cluster
• Scale Up, does the volume expand to the new node and GFS pod
• Scale Down, does the volume shrink to the new number of replicas
• TSP and Volume/Brick/Replication All Good?
• Multiple Gluster StatefulSets on single cluster

Phase 1.3 Status - Using the Solution

• Can I create pods that use the solution?
• Can I dynamically provision clusters or volumes?
• Create all-in-one docker image incorporating the gluster-post.sh
• Document tutorials

Additional Information:

• See main project page for more detail and discussion
• See scripts-and-yaml/scrath-pad-results for inital testing and validation of this project
• See Kicking the Tires with a Step-by-Step example running on AWS

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Project 2: TBD

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Project 3: Different Approaches

Phase 3.1 Status - Experimenting with different approaches

• Investigate Kube Operators?
• Investigate CRD?
• Investigate 3rdParty Resources
• Investigate specialized plugins/provisioners (external or internal)
• Investigate replacing shell script functionality with other technology