Updating cloud based OS images - configuration required for Azure RHEL LVM images

Is your feature request related to a problem? Azure RHEL RAW images are no longer being produced in favor of LVM-partitioned images (link). To have the latest updates we need to switch to LVM images. The default file system configuration in LVM images is not sufficient for Epiphany. Partitioning for a 64GB disk is as follows:

[operations@ci-devazurrhelflannel-kubernetes-master-vm-0 ~]$ df -h
Filesystem                 Size  Used Avail Use% Mounted on
devtmpfs                   3.4G     0  3.4G   0% /dev
tmpfs                      3.4G     0  3.4G   0% /dev/shm
tmpfs                      3.4G  9.1M  3.4G   1% /run
tmpfs                      3.4G     0  3.4G   0% /sys/fs/cgroup
/dev/mapper/rootvg-rootlv  2.0G   66M  2.0G   4% /
/dev/mapper/rootvg-usrlv    10G  1.4G  8.7G  14% /usr
/dev/mapper/rootvg-varlv   8.0G  7.9G   96M  99% /var
/dev/sda2                  494M   77M  418M  16% /boot
/dev/mapper/rootvg-homelv 1014M   33M  982M   4% /home
/dev/mapper/rootvg-optlv   2.0G  140M  1.9G   7% /opt
/dev/sda1                  500M  9.7M  491M   2% /boot/efi
/dev/mapper/rootvg-tmplv   2.0G   96M  1.9G   5% /tmp
/dev/sdb1                   14G   41M   13G   1% /mnt
tmpfs                      680M     0  680M   0% /run/user/1000

which results in an issue downloading the requirements: Error writing blob: write /var/tmp/docker-tarfile-blob336544209: no space left on device.

Describe the solution you’d like

LVM must be reconfigured to give us the ability to use the latest RHEL LVM images RedHat:RHEL:7-LVM:7.8.2020042719. Until then we use the latest RAW image RedHat:RHEL:7-RAW:7.7.2019090418.

Describe alternatives you’ve considered

Additional context

[sk4zuzu]

This is quite crazy it’s in todo just like that after the spike 😃 It’s a complex and dangerous procedure, IMO it requires further research and maybe some working ansible POC first? 🤔

[przemyslavic]

✔️ Fixed. Now Ansible waits for epiphany-lvm-merge.service to finish.

Mar 03 13:19:02 ci-devazurrhelflannel-repository-vm-0 epiphany-lvm-merge.sh[1876]: *** Finished script: /usr/local/sbin/epiphany-lvm-merge.sh at 13:19:02.516041465
Mar 03 13:19:02 ci-devazurrhelflannel-repository-vm-0 epiphany-lvm-merge.sh[1876]: *** Elapsed time: 0min 45s

[38;21m13:18:55 INFO cli.engine.ansible.AnsibleCommand - TASK [preflight : Check if epiphany-lvm-merge.service exists] ******************[0m
[38;21m13:18:57 INFO cli.engine.ansible.AnsibleCommand - ok: [ci-devazurrhelflannel-logging-vm-0][0m
[38;21m13:19:00 INFO cli.engine.ansible.AnsibleCommand - ok: [ci-devazurrhelflannel-repository-vm-0][0m

[38;21m13:19:00 INFO cli.engine.ansible.AnsibleCommand - TASK [preflight : Wait for epiphany-lvm-merge.service to finish] ***************[0m
[38;21m13:19:03 INFO cli.engine.ansible.AnsibleCommand - ok: [ci-devazurrhelflannel-repository-vm-0][0m
[38;21m13:19:03 INFO cli.engine.ansible.AnsibleCommand - ok: [ci-devazurrhelflannel-logging-vm-0][0m

Tested with the image RedHat:RHEL:7-LVM:7.9.2020111202 and the following config (had to increase the disk size to 64GB).

---
kind: infrastructure/virtual-machine
name: repository-machine-rhel
provider: azure
based_on: repository-machine
specification:
  storage_image_reference:
    publisher: $(image_publisher)
    offer: $(image_offer)
    sku: $(image_sku)
    version: $(image_version)
  storage_os_disk:
    disk_size_gb: 64

Partitioning for a 64GB disk is as follows:

[operations@ci-devazurrhelflannel-repository-vm-0 ~]$ df -h
Filesystem                 Size  Used Avail Use% Mounted on
devtmpfs                   1.6G     0  1.6G   0% /dev
tmpfs                      1.7G     0  1.7G   0% /dev/shm
tmpfs                      1.7G  9.2M  1.6G   1% /run
tmpfs                      1.7G     0  1.7G   0% /sys/fs/cgroup
/dev/mapper/rootvg-rootlv   54G  1.4G   52G   3% /
/dev/mapper/rootvg-usrlv    10G  1.4G  8.7G  14% /usr
/dev/sda2                  494M   76M  418M  16% /boot
/dev/sda1                  500M  9.9M  490M   2% /boot/efi
/dev/sdb1                  6.8G   32M  6.4G   1% /mnt
tmpfs                      329M     0  329M   0% /run/user/1001