Hi, On Mon, 2011-08-15 at 21:00 -0700, Colin McCabe wrote: > 2011/8/15 Székelyi Szabolcs <szekelyi@xxxxxxx>: > > Hi all, > > > > I'm running a Ceph cluster with a number of read-only ramdisk based clients > > mounting the filesystem. I'd like to get the logs of the client out via syslog. > > I've seen some posts dealing with logging to syslog, namely the thread > > starting at http://www.spinics.net/lists/ceph-devel/msg02876.html . I see > > options like "log to syslog" and "clog to syslog". It's not clear what they > > mean, could someone tell me the difference? > > "clog" is the center logger, which is a separate subsystem from the > regular logger. The central log is maintained by the monitors rather > than being a per-daemon thing like the regular log. > > > > > Anyway, currently my logging settings on the client are > > > > [global] > > log file = > > log dir = > > log to syslog = true > > clog to syslog = true > > > > But when the filesystem is mounted with the FUSE client, I still get > > > > failed to open log file '/var/log/ceph/client.admin.log': error 2: No such file > > or directory > > > > which is surprising. I thought that the above options should have disabled > > logging to file, but it looks like it still tries to open it. Is this a bug, or > > me doing something wrong? > > This looks like an actual bug :( > I'm testing out a fix that will allow users to turn off log files for > daemons again. > > On an unrelated note: when you log to syslog, you may need to turn > down the logging a little bit. Syslog tends to drop log messages when > the load gets heavy, and this makes it harder to figure out what is > going on. I also had that issue, but when using rsyslogd and using TCP for transport instead of UDP I wasn't able to see any dropped packets. To my experience it's not syslog dropping the packets, but UDP packets which get lost due to buffers being full at the kernel. # Sent all message to the remote syslog machine, then discard them to prevent local logging # Use TCP (@@) for transmission to prevent packet loss :rawmsg,contains,"osd." @@loghost & ~ :rawmsg,contains,"mon." @@loghost & ~ :rawmsg,contains,"mds." @@loghost & ~ Wido > > regards, > Colin > > > > > > > Thanks, > > -- > > cc > > > > -- > > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
