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treble33
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PostPosted: Fri Oct 19, 2012 6:13 pm    Post subject: [solved] could updating software rarely cause problems Reply with quote

Hello! I own gentoo server for like 2 or 3 years. Server uptime is almost year. And I install updates really rarely. I don't have physical access to server because it's located pretty far away in data center. So i'm a bit worried about installing critical updates. First thing is that I have many kernel versions:
[1] linux-2.6.34-gentoo-r6 *
[2] linux-2.6.39-gentoo-r3
[3] linux-3.2.12-gentoo
[4] linux-3.4.9-gentoo
Could swtiching to latest version cause any problems? Because I can't risk getting server offline after failed boot.

Also there are many python versions:
[1] python2.6
[2] python2.7 *
[3] python3.1
[4] python3.2

Can I safetly switch to latest python and delete others with depclean?

Should I fear any other startup problems related to emerging many updates after long time?


Last edited by treble33 on Sun Oct 21, 2012 9:10 pm; edited 1 time in total
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gentoo_ram
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PostPosted: Fri Oct 19, 2012 6:24 pm    Post subject: Reply with quote

Any Gentoo box that sits around without updates for that long should probably be re-installed from scratch. Would be less painful. Gentoo is more of a "live" distribution.
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Ant P.
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PostPosted: Fri Oct 19, 2012 6:53 pm    Post subject: Reply with quote

Perhaps a bigger problem than your server going offline, is that it's online, in a public datacentre, and an entire year behind on security updates. Have you run a rootkit checker recently?
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piedar
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PostPosted: Fri Oct 19, 2012 7:24 pm    Post subject: Reply with quote

Are you up to date other than kernel and python?

For python you'll be fine sticking with 2.7. Depclean should want to remove 2.6 and 3.1 unless something depends directly on them. Then again, I use 3.2 and it's rare to find something in the tree that doesn't work with it. Most packages that require a specific version use what they need instead of the system default. If you do switch python versions, make sure to run python-updater after.

For the kernel, as long as you configure it carefully and consistently with the old one, you should be fine. Just in case, have a look at Grub's fallback feature, which can boot the old kernel if the new one fails.

Oh, and make sure you read emerge output. There's lots of important information there, especially if you're doing a lot of major updates.
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treble33
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PostPosted: Fri Oct 19, 2012 8:10 pm    Post subject: Reply with quote

Everything else is up to date. There usually aren't any huge problems with blocking or anything like that.
My boot partition is not mounted after boot, so i guess it stays untouched thus can't cause any issues with booting?

I think everything will be fine anyway. Usually I do read emerge log, and there haven't been any problems.
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Ant P.
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PostPosted: Sat Oct 20, 2012 1:46 am    Post subject: Reply with quote

treble33 wrote:
Everything else is up to date.

What does `lsof -n | egrep '/(bin|lib).*\(deleted\)'` print out?
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treble33
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PostPosted: Sat Oct 20, 2012 7:45 am    Post subject: Reply with quote

Code:
screen     2625            root  txt       REG                8,3     342368     769627 /var/tmp/portage/app-misc/screen-4.0.3-r5/image/usr/bin/screen (deleted)
bash       2626            root  txt       REG                8,3     847992    1075620 /var/tmp/portage/app-shells/bash-4.2_p20/image/bin/bash (deleted)
screen     3958            root  txt       REG                8,3     342368     769627 /var/tmp/portage/app-misc/screen-4.0.3-r5/image/usr/bin/screen (deleted)
cs         3960            root  txt       REG                8,3     692536  814510729 /var/tmp/portage/app-shells/bash-4.2_p37/image/bin/bash (deleted)
screen    12297            root  txt       REG                8,3     342368     769627 /var/tmp/portage/app-misc/screen-4.0.3-r5/image/usr/bin/screen (deleted)
cs        12298            root  txt       REG                8,3     692536  814510729 /var/tmp/portage/app-shells/bash-4.2_p37/image/bin/bash (deleted)
screen    13655            root  txt       REG                8,3     342368     769627 /var/tmp/portage/app-misc/screen-4.0.3-r5/image/usr/bin/screen (deleted)
bash      13656            root  txt       REG                8,3     847992    1075620 /var/tmp/portage/app-shells/bash-4.2_p20/image/bin/bash (deleted)
screen    15299            root  txt       REG                8,3     342368     769627 /var/tmp/portage/app-misc/screen-4.0.3-r5/image/usr/bin/screen (deleted)
cs        15300            root  txt       REG                8,3     692536  814510729 /var/tmp/portage/app-shells/bash-4.2_p37/image/bin/bash (deleted)
screen    27780            root  txt       REG                8,3     342368     769627 /var/tmp/portage/app-misc/screen-4.0.3-r5/image/usr/bin/screen (deleted)
bash      27781            root  txt       REG                8,3     847992    1075620 /var/tmp/portage/app-shells/bash-4.2_p20/image/bin/bash (deleted)


I guess thats because i have 6 screen sessions open for long time. It also showed up dovecot and postfix but they disappeared after restarting them.
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Ant P.
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PostPosted: Sat Oct 20, 2012 3:05 pm    Post subject: Reply with quote

OK, that's not a bad sign.

The longer you leave it though, the more chance there is that something in the boot process will change in incompatible ways. That's already happened for other people with devtmpfs (and new udev requires it).
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treble33
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PostPosted: Sun Oct 21, 2012 9:13 pm    Post subject: Reply with quote

ok, so i did restart server, everything went well, only thing that booting took 20min`s because of filesystem check.
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