File storage for Docker Swarm
docker, docker-swarm, storage
Solution
Well `performance/storage space` wise, replicating is not the answer, You need a solution with `shared storage`. Like what we use in `Server Virtualization`. There are many SAN Storage brands out there, if you got the cash.
Now if you have a `virtualization infrastructure` in place like me (`vmware vsphere` in my case) you can use available `SAN Datastores` to store volumes via docker-volume vsphere driver. You will create docker volumes on `vmware datastores`, and they are shared between your `docker swarm` so in case of failure docker will start the containers (with their persistent data on volume) on another node in the swarm.
There are similar `drivers` for other vendors (Virtualization/Storage) too.
There are Cloud based solutions, you can use `Ceph`, `glusterfs`, `flocker` or other opensource distributed file systems for storing your containers `persistent data`.
Problem
I've been looking for weeks now for a suitable solution for persistent distributed file storage for my Docker Swarm implementation to no avail. I've have three nodes in a swarm, which multiple instances of multiple applications running perfectly fine. I'm at the point now where I need some consistency in storage across each of my applications but I don't seem to be able to find any straight forward solution to the problem. I want to take the least configurable approach as possible. I have a single cluster, with three nodes, and let's just say an instance of an application running on each. What is the best option here: 1. I have something to replicate files across each of my nodes 2. I have something to replicate files across each of my containers 3. I use a separate file store that I connect my nodes to 4. I use a separate file store that I connect my containers to Either way, I need some form of replication at a minimum for redundancy. Appreciate if anyone can set me on the right course with some options!