Yum Downgrade howto
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Sometimes things go wrong and you have to downgrade packages to an earlier state.
Here I write down my notes how I have done it, so I can reuse it later again.
Probably it helps you too.
Contents
1 What and When
- Analysis
- Can you reproduce the problem in QA?
- Do you have a test plan?
- Can you verify the desired state?
- Maintenance window?
- Prevent user access
- Fallback plan?
- DR Backup
- Snapshot
2 Verify the bug
- https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-smb/bffc70f9-b16a-453b-939a-0b6d3c9263af
- https://docs.gluster.org/en/latest/release-notes/6.0/
- https://bugs.centos.org/
[root@vglclu144 ~]# gluster snapshot list | tail autosnap_GMT-2021.01.16-17.58.01 autosnap_GMT-2021.01.17-10.58.01 autosnap_GMT-2021.01.17-17.58.01 autosnap_GMT-2021.01.18-10.58.01 autosnap_GMT-2021.01.18-17.58.01 autosnap_GMT-2021.01.19-10.58.01 autosnap_GMT-2021.01.19-17.58.01 autosnap_GMT-2021.01.20-10.58.01 autosnap_GMT-2021.01.20-15.17.11 autosnap_GMT-2021.01.20-17.58.01 [root@vglclu144 ~]# df -hTP | grep -e glusterfs -e cifs localhost:/ctdb fuse.glusterfs 2.0G 89M 2.0G 5% /mnt/ctdb localhost:/data fuse.glusterfs 2.0T 659G 1.4T 33% /mnt/data //localhost/CIFS-SHARE cifs 2.0T 659G 1.4T 33% /mnt/samba1 [root@vglclu144 ~]# ls -l /mnt/samba1/.snaps/autosnap_GMT-2021.01.20-17.58.01/ /mnt/data/.snaps/autosnap_GMT-2021.01.20-17.58.01/ /mnt/data/.snaps/autosnap_GMT-2021.01.20-17.58.01/: total 8 drwxrws---+ 15 root Sec1 4096 Jan 18 09:41 Sec1 drwxrws---+ 18 root SBIB 4096 Oct 7 08:00 Sec1_ProjContr /mnt/samba1/.snaps/autosnap_GMT-2021.01.20-17.58.01/: ls: reading directory /mnt/samba1/.snaps/autosnap_GMT-2021.01.20-17.58.01/: Is a directory total 0
3 Verify the previous working version and downgrade
In my case, I did just know that it was working before they upgraded.
Samba 4.10 seems to have a bug that prevents the VSS Folder restore with Gluster 6.
But I can not find anything about it in Community, it may be to early, I will create a bug report later on.
yum history list all | head
Loaded plugins: changelog, fastestmirror
ID | Login user | Date and time | Action(s) | Altered
-------------------------------------------------------------------------------
38 | root <root> | 2020-12-23 23:49 | I, O, U | 271 EE
37 | root <root> | 2020-12-15 15:10 | Install | 2
36 | root <root> | 2020-12-15 14:35 | Install | 1
35 | root <root> | 2020-11-10 10:36 | Install | 1
34 | root <root> | 2020-09-22 20:02 | Install | 1
sed -i 's/enabled=0/enabled=1/' /etc/yum.repos.d/CentOS-Vault.repo
yum makecache
yum list samba --show-duplicates
Installed Packages
samba.x86_64 4.9.1-10.el7_7 @C7.7.1908-updates
Available Packages
samba.x86_64 4.1.1-31.el7 C7.0.1406-base
samba.x86_64 4.1.1-33.el7_0 C7.0.1406-updates
samba.x86_64 4.1.1-35.el7_0 C7.0.1406-updates
samba.x86_64 4.1.1-37.el7_0 C7.0.1406-updates
samba.x86_64 4.1.1-38.el7_0 C7.0.1406-updates
samba.x86_64 4.1.12-21.el7_1 C7.1.1503-base
samba.x86_64 4.1.12-23.el7_1 C7.1.1503-updates
samba.x86_64 4.1.12-24.el7_1 C7.1.1503-updates
samba.x86_64 4.2.3-10.el7 C7.2.1511-base
samba.x86_64 4.2.3-11.el7_2 C7.2.1511-updates
samba.x86_64 4.2.3-12.el7_2 C7.2.1511-updates
samba.x86_64 4.2.10-6.el7_2 C7.2.1511-updates
samba.x86_64 4.2.10-6.2.el7_2 C7.2.1511-updates
samba.x86_64 4.2.10-7.el7_2 C7.2.1511-updates
samba.x86_64 4.4.4-9.el7 C7.3.1611-base
samba.x86_64 4.4.4-12.el7_3 C7.3.1611-updates
samba.x86_64 4.4.4-13.el7_3 C7.3.1611-updates
samba.x86_64 4.4.4-14.el7_3 C7.3.1611-updates
samba.x86_64 4.6.2-8.el7 C7.4.1708-base
samba.x86_64 4.6.2-10.el7_4 C7.4.1708-updates
samba.x86_64 4.6.2-11.el7_4 C7.4.1708-updates
samba.x86_64 4.6.2-12.el7_4 C7.4.1708-updates
samba.x86_64 4.7.1-6.el7 C7.5.1804-base
samba.x86_64 4.7.1-9.el7_5 C7.5.1804-updates
samba.x86_64 4.8.3-4.el7 C7.6.1810-base
samba.x86_64 4.8.3-4.el7.0.1 C7.6.1810-fasttrack
samba.x86_64 4.8.3-6.el7_6 C7.6.1810-updates
samba.x86_64 4.9.1-6.el7 C7.7.1908-base
samba.x86_64 4.9.1-10.el7_7 C7.7.1908-updates
samba.x86_64 4.10.4-10.el7 C7.8.2003-base
samba.x86_64 4.10.4-11.el7_8 C7.8.2003-updates
samba.x86_64 4.10.16-5.el7 base
samba.x86_64 4.10.16-7.el7_9 updates
samba.x86_64 4.10.16-9.el7_9 updates
yum history info 38 | grep -e samba -e libwbclient -e 4.9.1-10.el7_7 | awk '{print $2}' | xargs echo yum downgrade
yum downgrade ctdb-4.9.1-10.el7_7.x86_64 libsmbclient-4.9.1-10.el7_7.x86_64 libwbclient-4.9.1-10.el7_7.x86_64 samba-4.9.1-10.el7_7.x86_64 samba-client-4.9.1-10.el7_7.x86_64 samba-client-libs-4.9.1-10.el7_7.x86_64 samba-common-4.9.1-10.el7_7.noarch samba-common-libs-4.9.1-10.el7_7.x86_64 samba-common-tools-4.9.1-10.el7_7.x86_64 samba-libs-4.9.1-10.el7_7.x86_64 samba-vfs-glusterfs-4.9.1-10.el7_7.x86_64
yum remove pyldb
sed -i 's/enabled=1/enabled=0/' /etc/yum.repos.d/CentOS-Vault.repo
yum makecache
4 Lock the current state
An Upgrade would destroy all your work, so lets lock it down
yum install yum-plugin-versionlock yum versionlock ctdb-4.9.1-10.el7_7.x86_64 libsmbclient-4.9.1-10.el7_7.x86_64 libwbclient-4.9.1-10.el7_7.x86_64 samba-4.9.1-10.el7_7.x86_64 samba-client-4.9.1-10.el7_7.x86_64 samba-client-libs-4.9.1-10.el7_7.x86_64 samba-common-4.9.1-10.el7_7.noarch samba-common-libs-4.9.1-10.el7_7.x86_64 samba-common-tools-4.9.1-10.el7_7.x86_64 samba-libs-4.9.1-10.el7_7.x86_64 samba-vfs-glusterfs-4.9.1-10.el7_7.x86_64 Loaded plugins: changelog, fastestmirror, versionlock Adding versionlock on: 0:samba-common-tools-4.9.1-10.el7_7 Adding versionlock on: 0:samba-common-4.9.1-10.el7_7 Adding versionlock on: 0:samba-libs-4.9.1-10.el7_7 Adding versionlock on: 0:libwbclient-4.9.1-10.el7_7 Adding versionlock on: 0:samba-client-libs-4.9.1-10.el7_7 Adding versionlock on: 0:ctdb-4.9.1-10.el7_7 Adding versionlock on: 0:samba-client-4.9.1-10.el7_7 Adding versionlock on: 0:samba-4.9.1-10.el7_7 Adding versionlock on: 0:samba-vfs-glusterfs-4.9.1-10.el7_7 Adding versionlock on: 0:samba-common-libs-4.9.1-10.el7_7 Adding versionlock on: 0:libsmbclient-4.9.1-10.el7_7 yum versionlock list Loaded plugins: changelog, fastestmirror, versionlock 0:samba-common-tools-4.9.1-10.el7_7.* 0:samba-common-4.9.1-10.el7_7.* 0:samba-libs-4.9.1-10.el7_7.* 0:libwbclient-4.9.1-10.el7_7.* 0:samba-client-libs-4.9.1-10.el7_7.* 0:ctdb-4.9.1-10.el7_7.* 0:samba-client-4.9.1-10.el7_7.* 0:samba-4.9.1-10.el7_7.* 0:samba-vfs-glusterfs-4.9.1-10.el7_7.* 0:samba-common-libs-4.9.1-10.el7_7.* 0:libsmbclient-4.9.1-10.el7_7.* versionlock list done # yum versionlock clear # this can be used to release locks
