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[Solved] Failed to set hostname, openrc
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pyx
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Joined: 12 Apr 2024
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PostPosted: Fri Apr 12, 2024 10:14 pm    Post subject: [Solved] Failed to set hostname, openrc Reply with quote

Hi there, I've been encountered something weird with hostname lately.

I am using openrc-0.54.

For example, if I have:

/etc/hostname
Code:
tux


/etc/conf.d/hostname
Code:
hostname="tux"


/etc/hosts
Code:
127.0.0.1   tux localhost
::1      tux localhost


Service "hostname" is in boot runlevel.

Instead of setting the host name to "tux", what I got is 13 digits of hex number (looks like random number but fixed for individual machine) as host name.

"rc-status -s" shows service "hostname" had been started.

Running "rc-config restart hostname" will set the host name correctly afterwards.

I have service "connman" in default runlevel, but I doubt this is relevant.

This problem started show up about 1 or 2 years ago. I have 5 gentoo boxes with almost identical hostname configuration, only differ in the hostname value (with different names), 3 of them are like that, a newly installed one (last week) worked fine (correctly setting hostname) for a week, after a few update and reboot, had the same problem.

Does anyone have same experience?


Last edited by pyx on Tue Apr 16, 2024 12:56 am; edited 2 times in total
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grknight
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Joined: 20 Feb 2015
Posts: 1910

PostPosted: Fri Apr 12, 2024 10:47 pm    Post subject: Reply with quote

This is most likely your DHCP provider setting a hostname on network starting. Not sure how to tell connman to bypass this.
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pyx
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PostPosted: Fri Apr 12, 2024 11:07 pm    Post subject: Reply with quote

grknight wrote:
This is most likely your DHCP provider setting a hostname on network starting. Not sure how to tell connman to bypass this.


Thank you. I will do some research on that.

Edit: confirmed, I removed service "connman" from runlevel default and the hostname is set correctly, now the problem becomes how do I bypass that like you said. BTW, service "display-manager" will crash if I removed "connman" from default runlevel. Will update if I fixed the problem.
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pyx
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PostPosted: Fri Apr 12, 2024 11:36 pm    Post subject: Reply with quote

Fixed with a (possibly ugly) workaround, I made service "hostname" start after "connman", thus, added service "connman" to runlevel boot and service "hostname" to runlevel default.

Thank you again, grknight
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grknight
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PostPosted: Sat Apr 13, 2024 12:40 am    Post subject: Reply with quote

A quick search shows that editing /etc/connman/main.conf with the following may fix your issue:
Code:
[General]
AllowHostnameUpdates=false
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pyx
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PostPosted: Sat Apr 13, 2024 1:01 am    Post subject: Reply with quote

grknight wrote:
A quick search shows that editing /etc/connman/main.conf with the following may fix your issue:
Code:
[General]
AllowHostnameUpdates=false


https://github.com/aldebaran/connman/blob/914cf2749d4fc24b54f4a0c44f690090d08af147/doc/connman.conf.5#L96
You are right, haven't tried it yet but this should work.
Thank you.

Edit: tested, it worked.
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