I’m not using Docker, but I am using Gluster for my HA WordPress setup. Works well, handles every failure scenario I’ve come up with pretty gracefully. (Maybe I’m not imaginative enough…) Ping me off-list if you have any questions about Gluster specifically – it was actually pretty easy to set up. Only issue is that the client eats a lot of CPU, but CPU is pretty cheap these days.
Depending on implementation details, S3 may not be able to do everything. You need to be able to update WordPress itself, and its plugins/themes, and those probably can’t be S3, since they’re code. David Smith From: tech-boun...@lists.lopsa.org [mailto:tech-boun...@lists.lopsa.org] On Behalf Of Matt Simmons Sent: Friday, September 09, 2016 7:22 AM To: Morgan Blackthorne <mor...@windsofstorm.net> Cc: LOPSA Technical Discussions <t...@lopsa.org> Subject: Re: [lopsa-tech] Docker swarm and filesystems Have you considered using a Wordpress plugin to upload the files to an API, rather than a filesystem? If this were a swarm of machines in Amazon, for instance, the S3 plugin would make lots of sense. (It would still make sense if you were using Riak (or some other local S3-compliant object store)). If nothing else, you could use NFS, but that's kind of icky for this solution. There's flocker (https://clusterhq.com/flocker/introduction/) but I've never used it and I don't know anything about it except that it claims to solve this problem. Good luck and let us know what you use! --Matt On Friday, September 9, 2016, Morgan Blackthorne <mor...@windsofstorm.net<mailto:mor...@windsofstorm.net>> wrote: Anyone out there working with Docker swarm where applications need to access a shared filesystem across the swarm? I know how to link containers together inside a host, but I don't think you can link to a container on a different host. Specifically I'm looking at taking some forums and WordPress sites and moving them from single-host containers into Swarm services, without disrupting the ability to do file uploads for attachments, user avatars, etc. I saw some references to running a Gluster swarm and using those as a container, but I haven't found much in the way of detail on that. Flocker looks interesting, but doesn't seem like it handles all the cases that I'm looking for. Or maybe I should just look at creating a replicated filesystem across the Docker host servers and then pointing the Swarm containers at subdirectories off of that shared filesystem. I'm sure it has to be a known issue, but with Swarm being so new, it's hard to find a lot of documentation around this scenario right now... or at least, trying to sift through the noise to find the signal. Thanks! --Morgan -- "Today, vegetables... Tomorrow, the world!"
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