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Docker Slow Ext4 Partition

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Been using Docker for Windows quite a lot lately.

Unfortunately running docker containers on windows is still not done natively, so we have to rely on a Linux Hyper-V Virtual Machine. Windows xp sp1a iso. This VM have a tendency to grow large quite fast if you work with many images, and yesterday I found myself running out of space on my C-drive due to that.

Luckily I thought I could just change the settings for the vhd location from the docker for windows settings to my other drive. But nope. That didn’t work. Then I tried to move the Hyper-V disk manually, and changing the path in Hyper-V, which just resulted in Docker for windows reprovisioning the Hyper-V machine to the C-drive again.

The docker zfs storage driver requires a zfs zpool to be created and mounted on the partition or disk where docker data should be stored. Snapshots (read-only) and Clones (read-write) are used to manage the images and containers. Zfs does not honor, or even allow, the dm.basesize setting.

  1. Mar 02, 2018 MySQL on Ubuntu becomes extremely slow just by having docker-ce installed. Steps to reproduce the behavior. /var/lib/docker is on an ext4 partition on a SSD.
  2. Mar 08, 2021 To format the partition, use the mkfs command as shown. Here, we are formatting the partition as an ext4 filesystem. $ sudo mkfs.ext4 /dev/sdb1. Step 5) Mount the partition with mount command. Next, create a mount point using the mkdir command as shown. $ sudo mkdir -p /media/volume. Then mount the disk partition to the mount point as shown.
  3. I had the same problem, running mysql anormally slow in docker, and discovered that it had nothing to do with docker at all (i have pretty much the same configuration as you, but with ext4 partition); it was my file system extremly slow with mysql (and maybe with other packages but i didn’t notice). I resolved the problem following this tutorial.
  4. See full list on dnmc.in.

In the end, it turns out that this functionality is quite buggy, so the way I managed to move my disk was to close docker completely. And move the disk to my other drive E:VirtualMachineMobyLinuxVM.vhdx. When that is done you can edit
C:UsersblasiAppDataRoamingDockersettings.json and change the value of MobyVhdPathOverride to the new location of the VHDX E:VirtualMachineMobyLinuxVM.vhdx. When you restart the docker for windows service, it will pick up the change and change your Hyper-V configuration for you.

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