[lxd, zfs, pool, expand] How to expand the lxd default zfs pool capacity

How to expand the LXD default zfs pool capacity 

井民全, Jing, mqjing@gmail.com

FAQ:  The Docker, KVM, Vagrant, VirtualBox, VMWare, Hyper-V

You can follow the instructions to expand the LXD default zfs pool capacity if it is not enough. 

Table of contents

1. Quick 1

2. Procedure 2

2.1. Step 1: Stop all running containers 2

2.2. Step 2: Resize the storage device 3

2.2.1. Get the virtual disk location 3

2.2.2. Resize the device 3

2.3. Step 3: Expand the pool size 4

2.4. Step 4: Restart all containers 5

3. References 5

1. Quick

# stop all container lxd list # get the container name lxd stop ubuntu-container # resize the virtual disk zpool status  # get the virtual disk location sudo ls -la  /var/snap/lxd/common/lxd/disks/default.img  # check the original size sudo truncate -s +20G /var/snap/lxd/common/lxd/disks/default.img sudo ls -la  /var/snap/lxd/common/lxd/disks/default.img  # check the expended size # expend the pool zpool list  # check size sudo zpool status -vg default # get the device id for the pool sudo zpool online -e default 14277165744894305174 #  aware the zfs  # check the pool capacity zpool list # restart containers lxd start ubuntu-container

2. Procedure

2.1. Step 1: Stop all running containers

E.g.

lxd list

lxd stop ubuntu-container

2.2. Step 2: Resize the storage device

Here, this is a virtual disk. 

2.2.1. Get the virtual disk location

zpool status

2.2.2. Resize the device

sudo ls -la  /var/snap/lxd/common/lxd/disks/default.img  # check the original size sudo truncate -s +20G /var/snap/lxd/common/lxd/disks/default.img sudo ls -la  /var/snap/lxd/common/lxd/disks/default.img  # check the expended size

E.g. 

Fig.Before expending the file size.

Fig. After expanding the file size.

2.3. Step 3: Expand the pool size

zpool list  # check size sudo zpool status -vg default # get the device id for the pool sudo zpool online -e default 14277165744894305174 #  aware the zfs

Fig. Chck the default pool capacit. 

Fig. Get the pool device ID.

Fig. Run the pool expansion.

Verification

zpool list

Fig. Check the capacity after 

2.4. Step 4: Restart all containers

lxc start ubuntu-container

3. References

1. https://discuss.linuxcontainers.org/t/how-to-resize-zfs-used-in-lxd/1333/10

2. https://sites.google.com/site/itmyshare/storage/storage-disk/zfs-device-autoreplace-and-autoexpand

3. https://docs.oracle.com/cd/E19253-01/819-5461/githb/index.html