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Merge https://github.com/rancher/rancher.github.io/pull/835

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Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>
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Sven Dowideit 2017-07-14 08:45:04 +10:00
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10
docs/os/storage/using-zfs/index.md
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@ -26,7 +26,7 @@ $ lsmod | grep zfs
> *Note:* if you switch consoles, you may need to re-run `ros up zfs`. > *Note:* if you switch consoles, you may need to re-run `ros up zfs`.
#### Using ZFS #### Creating ZFS pools
After it's installed, it should be ready to use. Make a zpool named `zpool1` using a device that you haven't yet partitioned (you can use `sudo fdisk -l` to list all the disks and their partitions). After it's installed, it should be ready to use. Make a zpool named `zpool1` using a device that you haven't yet partitioned (you can use `sudo fdisk -l` to list all the disks and their partitions).
@ -46,6 +46,14 @@ $ docker run --rm -it -v /mnt/zpool1/:/data alpine ls -la /data
To experiment with ZFS, you can create zpool backed by just ordinary files, not necessarily real block devices. In fact, you can mix storage devices in your ZFS pools; it's perfectly fine to create a zpool backed by real devices **and** ordinary files. To experiment with ZFS, you can create zpool backed by just ordinary files, not necessarily real block devices. In fact, you can mix storage devices in your ZFS pools; it's perfectly fine to create a zpool backed by real devices **and** ordinary files.
#### Using the ZFS debugger utility
The `zdb` command may be used to display information about ZFS pools useful to diagnose failures and gather statistics. By default the utility tries to load pool configurations from `/etc/zfs/zpool.cache`. Since the RancherOS ZFS service does not make use of the ZFS cache file and instead detects pools by inspecting devices, the `zdb` utility has to be invoked with the `-e` flag.
E.g. to show the configuration for the pool `zpool_1` you may run the following command:
> $ sudo zdb -e -C zpool_1
## ZFS storage for Docker on RancherOS ## ZFS storage for Docker on RancherOS
First, you need to stop the`docker` system service and wipe out `/var/lib/docker` folder: First, you need to stop the`docker` system service and wipe out `/var/lib/docker` folder: