Thanks for filing this bug in Ubuntu. The scenario is confirmed: when specifying an address to bind to, rsync will fail if that address is not available: /var/log/syslog:Jun 4 21:12:27 bionic-rsync-1774788 rsyncd[269]: rsyncd version 3.1.2 starting, listening on port 873 /var/log/syslog:Jun 4 21:12:27 bionic-rsync-1774788 rsyncd[269]: bind() failed: Cannot assign requested address (address-family 2) /var/log/syslog:Jun 4 21:12:27 bionic-rsync-1774788 rsyncd[269]: unable to bind any inbound sockets on port 873 /var/log/syslog:Jun 4 21:12:27 bionic-rsync-1774788 rsyncd[269]: rsync error: error in socket IO (code 10) at socket.c(555) [Receiver=3.1.2]
The solution seems to be for rsync to adopt the socket option IP_FREEBIND. >From the ip(7) manpage: IP_FREEBIND (since Linux 2.4) If enabled, this boolean option allows binding to an IP address that is nonlocal or does not (yet) exist. This per‐ mits listening on a socket, without requiring the underlying network interface or the specified dynamic IP address to be up at the time that the application is trying to bind to it. This option is the per-socket equivalent of the ip_nonlo‐ cal_bind /proc interface described below. Until then, one workaround would be to configure the service file for rsyncd to wait for the network to be online. If you run: sudo systemctl edit rsync.service It will open an editor. Put these lines in: [Unit] After=network.target,network-online.target Then save. That will create /etc/systemd/system/rsync.service.d/override.conf with the two lines above. Alternatively you can just create the file above directly with the specified content without going through "systemctl edit". You can then reboot and see if that helps. Note that the job will fail, after reaching the network-online target, if you specify an IP address that doesn't exist at that stage. Another option I saw in https://unix.stackexchange.com/questions/442181 /sshd-failed-due-to-network-not-yet-available but haven't tested is to make a system-wide change in /proc. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to rsync in Ubuntu. https://bugs.launchpad.net/bugs/1774788 Title: Daemon won't start at boot up (18LTS fully patched) Status in rsync package in Ubuntu: New Bug description: By adding the 'address=' option to the /etc/rsyncd.conf file, the daemon fails at boot. Once the NIC(s) is/are up, it will start fine when executed via systemctl start rsync ● rsync.service - fast remote file copy program daemon Loaded: loaded (/lib/systemd/system/rsync.service; enabled; vendor preset: enabled) Active: failed (Result: exit-code) since Sat 2018-06-02 08:01:31 CST; 52min ago Process: 851 ExecStart=/usr/bin/rsync --daemon --no-detach (code=exited, status=10) Main PID: 851 (code=exited, status=10) Jun 02 08:01:31 billlaptop.private.ycc systemd[1]: Started fast remote file copy program daemon. Jun 02 08:01:31 billlaptop.private.ycc rsyncd[851]: rsyncd version 3.1.2 starting, listening on port 873 Jun 02 08:01:31 billlaptop.private.ycc rsyncd[851]: bind() failed: Cannot assign requested address (address-family 2) Jun 02 08:01:31 billlaptop.private.ycc systemd[1]: rsync.service: Main process exited, code=exited, status=10/n/a Jun 02 08:01:31 billlaptop.private.ycc rsyncd[851]: unable to bind any inbound sockets on port 873 Jun 02 08:01:31 billlaptop.private.ycc systemd[1]: rsync.service: Failed with result 'exit-code'. Jun 02 08:01:31 billlaptop.private.ycc rsyncd[851]: rsync error: error in socket IO (code 10) at socket.c(555) [Receiver=3.1.2] ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: rsync 3.1.2-2.1ubuntu1 ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17 Uname: Linux 4.15.0-22-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.1 Architecture: amd64 CurrentDesktop: GNOME Date: Sat Jun 2 08:48:15 2018 InstallationDate: Installed on 2018-06-01 (0 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) SourcePackage: rsync UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/rsync/+bug/1774788/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
