Space issues, recent

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1

Is it my imagination or is there an epidemic of “running out of space” problems lately?

I can’t remember for certain, but I think the 30 minute install used to mention minimum disk space 8 G.

What is the absolute minimum for an instance with OS, Docker etc, the running docker images, 1 backup, retention 1 backup, and enough left over to do ./launcher cleanup, then rebuild app ?

Probably worth mentioning in the 30 min install.

2

This is expected, we recently forced everyone on a new image.

@Falco we should perhaps add to your list to have rebuild offer to do a cleanup if you are close to the edge.

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3

https://github.com/discourse/discourse_docker/pull/357

I went with this approach:

On rebuild or bootstrap if the user has less than 5GB on the /var/lib/docker path, we print a warning and exit.

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4

Pretty sure we had this check before (in discourse-setup script), but maybe not on rebuild?

I remember @sam was very unhappy about the idea that any setup checks would happen in launcher.. is this space check OK there @sam?

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5

5GB should be enough headroom for the update, at least for a while. I would suggest warn and exit if less than that is fine, but I think it might make sense to get the size of the last backup, and if (after the update) there won’t be enough space for the next backup, then at least warn, or better yet give them the choice.

That way they are aware that they have to do something about space before it becomes a show stopper. At the moment some of the support questions are urgent because the forum stops working. Warning the admin that they’re about to ring the bell may make them be a bit more proactive.

6

Cool. I just made the script use the correct docker storage path, when a user customize it.

I think this should be an warning in the app, possibly an extension to this.

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7

That would be fine. We’re talking about the difference between Discourse warning you that your instance might stop working soon, and it just informing you that it has already stopped working (in the CLI) or failing to update via the GUI.

Warnings are less stressful than a broken installation (for the admin) and if they include a link to some basic triage then admins who don’t ignore the warnings may be able to resolve the issue themselves, rather than posting here on meta with “My instance is broken, what do I do?”

Some rough idea of the RAM footprint (over time) of the instance would be great, down at the bottom of /admin where it shows space. The way I see it there are a lot of support topics which resolve down to RAM and disk space problems - warnings might reduce how often people need support.

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Discourse health check function
8 
root@test:/var/discourse# ./launcher rebuild app
磁盘上的空闲空间不足 5GB。您需要更多空间才能继续

是否尝试通过清理系统中的 Docker 镜像和容器来回收空间？(y/N)y
警告！这将删除：
        - 所有已停止的容器
        - 所有未被至少一个容器使用的卷
        - 所有未被至少一个容器使用的网络
        - 所有悬空镜像
您确定要继续吗？[y/N] y
已删除的镜像：
deleted: sha256:819eeb6f03508bc5bc3513b1c3ad15676f89eca0aad3e9cd5aee91814232c659
deleted: sha256:ee29540380f982c413b738107117efd9ea47ccbf7a734a4a6b599f6fadf48d80
deleted: sha256:8fa33f3175ab8c85b934f5de02b23d3b4f006e947a63c7b2e8ed9f00b4120784
deleted: sha256:4dc0122075eb31044391c92fbfe3427faa6247b87b62d9872e94072891776de1
deleted: sha256:9b2efd6b6ef11f51e7109b006e852d5a672db6b48a5a7e38f9f1a0ade1abc772
deleted: sha256:24f0df43021665bd15bf59945554929c0cea86e21828de355a4154d707bdee9b

回收的总空间：2.651 GB
如果清理成功，您现在可以重试
root@test:/var/discourse#

这是使用新的 Docker 清理功能完成的，即使您的可用空间为 0 字节也能正常工作。我们还尝试检测用于释放空间的正确文件夹。

如果这给您带来任何问题，请打开一个 Contribute > Bug 主题，并记住您始终可以使用 --skip-prereqs 跳过此步骤。

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