Because of the ‘GHOST’ scare, and the apparent lack of patched RPMs available for
glibc for Fedora 19,
I decided to bite the bullet and upgrade some VPSs to Fedora 21. However, instead of doing the
sane thing (creating a fresh VPS and copying everything over) I decided to throw caution to the
wind and upgrade the VPS in situ.
Digital Ocean Control Panel = SCORE!
The thing that makes it bearable on Digital Ocean is that the control panel
makes it easy to switch kernels (which would otherwise be
grub on a standalone machine).
On the other hand, they don’t appear to have all the kernel version available, which means that a straight ‘upgrade’ needs to be fixed by installing a previous kernel (one which they do have on the drop-down list).
Step 1 : Take a snapshot
(unless you are actually insane).
Step 2 : Step through a helpful script
Check out this script.
However, I went through this step-by step, since running a clean
after more than a year of bit-rot would be a surprise.
First, note the kernel that’s being run :
Then have a run through the first (uncontraversial) steps :
Then onto the upgrade proper :
This threw up a series of niggles…
Step 2a : Fix dependency issues
Remember to reinstall its dependencies
Step 2b :
yum runs into memory issues
This is a little disheartening, but the VPS is only 512Mb…
So, refusing to give up, shut down running processes :
Step 2c :
yum+presto runs into memory issues
The solution to this was just to repeatedly re-run
yum --releasever=21 distro-sync -
eventually all the RPMs get downloaded / expanded successfully (about 3 iterations required).
Step 2d : Continue with the script
Step 3 : Change kernel on control panel
According to script : same as currently running (fc19).
Power On (via the Panel) takes a while…
Step 4 : Change to upgraded kernel on control panel
Ah - but here’s a problem :
yum gave us
but the Panel only lists a previous version.
Therefore, need to install the previous version so that we can successfully switch to it.
So : Search for most recent one listed on DigitalOcean,
by visiting the Koju build site,
and going to the
3.18.3-201.fc21 page. There snag the three required RPMs :
Fortunately, that works.
Step 5 : Change (for real, this time) to the FC21 kernel on the control panel
Step 6 : Backtrack over packages that
yum complained about
Minor outstanding issue
The Digital Ocean panel still shows ‘Fedora Fedora 19 x64’ in the droplet’s header field (presumably because that’s the image it was originally created from).
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