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Am Wed, 25 Feb 2015 23:42:20 +0100 |
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schrieb Marc Joliet <marcec@×××.de>: |
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|
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> Am Wed, 25 Feb 2015 00:11:18 +0100 |
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> schrieb Marc Joliet <marcec@×××.de>: |
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> |
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> [...] |
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> > What was more difficult was getting it to depend on the right network target |
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> > properly. The same "Requires" line that worked for samba and cups fails with |
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> > "failed to add dependency" type errors: |
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> > |
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> > Feb 24 21:20:01 marcec systemd[540]: Cannot add dependency job for unit |
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> > mpd.service, ignoring: Unit netctl@×××××××××.service failed to load: No such file or directory. |
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> > |
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> > So apparently user units can't "Require" system units? However, adding a |
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> > symlink from the service unit in /etc to .../mpd.service.requires/ solved that |
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> > problem, but yielded a new one: |
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> > |
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> > Feb 24 23:26:49 marcec network[2200]: netctl needs root privileges |
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> > |
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> > Oh, well... Maybe it would work with systemd-networkd? |
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> [...] |
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> |
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> FWIW, I found this earlier today: |
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> http://www.freedesktop.org/wiki/Software/systemd/NetworkTarget/, which even has |
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> its own FAQ entry (guess I should have found it earlier, then). Systemd has a |
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> network-online.target, which looks like what I want(ed). I'm too tired to try it |
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> now, but I'll do so tomorrow. |
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|
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OK, I looked at this today and it turns out that the way I reconfigured mpd (to |
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use 'bind_to_address "any"') is not only a simpler way to express what I had |
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already configured it to do anyway, but is also in line with the recommendations |
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in the above article (in the last section "What does this mean for me, a |
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Developer?"). |
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|
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That article also pointed me to the correct solution for my cups and dovecot |
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socket units: what one *should* do when one wants/has to listen to a particular |
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address is set "FreeBind=true", which allows the bind to succeed even if the |
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address is not configured yet. This is obviously much better than trying to |
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meddle with dependencies as I was doing above. |
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|
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(Current versions (i.e., ~arch) of MPD ship a socket unit, so one can use |
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FreeBind there, too, if necessary.) |
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|
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-- |
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Marc Joliet |
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-- |
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"People who think they know everything really annoy those of us who know we |
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don't" - Bjarne Stroustrup |
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