Final Call ... XenServer Boot Media
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Ok, wait wait wait a second here.
This all started because someone here said (I think it was @scottalanmiller ) that is was easy to send the logs from XS somewhere else. And it is. But they is still a bunch of local writing. Even though locations have changed in XS7, the concept is the same.
So, let's take this in steps.
In 6.5, the configuration was located in /var/lib/syslong.conf, as stated in that article.
Finally, select "OK" and the stand-alone XenServer (or pool) will update its Syslog configuration, or more specifically, /var/lib/syslog.conf. The reason for this is so Elastic Syslog can take over the normal duties of Syslog: forwarding messages to the Syslog aggregator accordingly. Certain logs will still continue to record Syslog on the host, so it may be desirable to edit /var/lib/syslog.conf and add comments to lines where a "-/var/log/some_filename" is specified as lines with "@x.x.x.x" dictate to forward to the Syslog aggregator. As an example, I have marked the lines in bold to show where comments should be added to prevent further logging to the local disk:In XS7, the config file appears to be saved in /etc/rsyslog.d/xenserver.conf
When local logging in on, it looks like this
# Suppress duplicate messages and report "Last line repeated n times" $RepeatedMsgReduction on # Don't rate-limit messages - this isn't the right way to go about # reducing log size! $IMUXSockRateLimitInterval 0 $SystemLogRateLimitInterval 0 # Ensure critical and higher level errors are logged synchronously. *.crit;mail.none;authpriv.none;cron.none /var/log/crit.log # Log by facility. kern.* -/var/log/kern.log daemon.* -/var/log/daemon.log user.* -/var/log/user.log # The authpriv file has restricted access. authpriv.* -/var/log/secure # Log all the mail messages in one place. mail.* -/var/log/maillog # Log cron stuff cron.* -/var/log/cron # Save boot messages also to boot.log local7.* /var/log/boot.log # Xapi rbac audit log echoes to syslog local6 local6.* -/var/log/audit.log # Xapi, xenopsd echo to syslog local5 local5.* -/var/log/xensource.log # V6d echo to syslog local4 local4.* -/var/log/v6d.log # xenstore access to syslog local3 local3.info -/var/log/xenstored-access.log # Storage Manager to syslog local2 local2.* -/var/log/SMlog # xcp-rrdd-plugins (info and above) to local0 local0.info -/var/log/xcp-rrdd-plugins.log # ignore default rules *.*When remote logging is turned on the file looks like this, which you can see is almost the same, with the exception of the remote IP address added of the logging server.
# Suppress duplicate messages and report "Last line repeated n times" $RepeatedMsgReduction on # Don't rate-limit messages - this isn't the right way to go about # reducing log size! $IMUXSockRateLimitInterval 0 $SystemLogRateLimitInterval 0 # Ensure critical and higher level errors are logged synchronously. *.crit;mail.none;authpriv.none;cron.none /var/log/crit.log # Log by facility. kern.* -/var/log/kern.log daemon.* -/var/log/daemon.log user.* -/var/log/user.log # The authpriv file has restricted access. authpriv.* -/var/log/secure # Log all the mail messages in one place. mail.* -/var/log/maillog # Log cron stuff cron.* -/var/log/cron # Save boot messages also to boot.log local7.* /var/log/boot.log # Xapi rbac audit log echoes to syslog local6 local6.* -/var/log/audit.log # Xapi, xenopsd echo to syslog local5 local5.* -/var/log/xensource.log # V6d echo to syslog local4 local4.* -/var/log/v6d.log # xenstore access to syslog local3 local3.info -/var/log/xenstored-access.log # Storage Manager to syslog local2 local2.* -/var/log/SMlog # xcp-rrdd-plugins (info and above) to local0 local0.info -/var/log/xcp-rrdd-plugins.log # ignore default rules *.* @10.0.4.31 *.* -
So seeing this, what would you think the next logical step would be to accomplish what I want.
And by association, what anyone running XS off USB would want?
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And also, is that a good idea in the grand scheme of things.
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I would still assume based on what you've presented that you need to comment out the local storage folders on both XS6.5 and XS7 to disable logging locally.
The
*.*(at the very end) what purpose does that server? -
BTW, there was a post on the XenServer forums about running off of USB today, and this was the response (from a user with almost 6,000 posts there):
"Its technically possible, but frowned upon due to SD cards usually not being good quality that can handle the amount of read/writes. There are sites/link on the Internet where others have done such a thing. Citrix will likely not be of assistance if you need there support, you would be totally on your own."
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@DustinB3403 said in Final Call ... XenServer Boot Media:
I would still assume based on what you've presented that you need to comment out the local storage folders on both XS6.5 and XS7 to disable logging locally.
The . (at the very end) what purpose does that server?
No idea.
And I wonder if we really NEED those logs.
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I also took a look at the /var/log directory. There is a ton of stuff in there. It appears that XS7 is now archiving previous day logs. If that is the case, it might be OK on USB because it would always be writing to new areas, no?
-rw------- 1 root root 11128337 Sep 6 11:00 xensource.log -rw------- 1 root root 1439756 Sep 6 11:00 audit.log -rw------- 1 root root 835573 Sep 6 11:00 SMlog -rw------- 1 root root 7792 Sep 6 11:00 cron -rw------- 1 root root 73125 Sep 6 11:00 daemon.log -rw------- 1 root root 28967 Sep 6 10:56 xcp-rrdd-plugins.log -rw------- 1 root root 4999 Sep 6 10:53 secure -rw-r--r-- 1 root root 38273316 Sep 6 10:36 lastlog -rw-rw-r-- 1 root utmp 38016 Sep 6 10:36 wtmp drwxr-xr-x 2 root root 4096 Sep 6 04:02 xen -rw------- 1 root root 0 Sep 6 04:02 xenstored-access.log -rw-r--r-- 1 root root 0 Sep 6 04:02 boot.log -rw-r--r-- 1 root root 0 Sep 6 04:02 interface-rename.log -rw------- 1 root root 0 Sep 6 04:02 kern.log -rw------- 1 root root 0 Sep 6 04:02 maillog -rw------- 1 root root 0 Sep 6 04:02 messages -rw------- 1 root root 0 Sep 6 04:02 spooler -rw------- 1 root root 0 Sep 6 04:02 user.log -rw------- 1 root root 28610 Sep 6 04:02 cron.1 -rw------- 1 root root 244847 Sep 6 04:02 daemon.log.1 -rw------- 1 root root 186 Sep 6 04:02 user.log.1 -rw------- 1 root root 4951616 Sep 6 04:01 audit.log.1 -rw------- 1 root root 2876101 Sep 6 04:01 SMlog.1 -rw------- 1 root root 100512 Sep 6 04:00 xcp-rrdd-plugins.log.1 -rw------- 1 root root 25827200 Sep 6 00:39 xensource.log.1 drwxr-xr-x 2 root root 4096 Sep 6 00:00 sa -rw-r--r-- 1 root root 0 Sep 5 04:02 boot.log.1 -rw------- 1 root root 0 Sep 5 04:02 kern.log.1 -rw------- 1 root root 0 Sep 5 04:02 maillog.1 -rw------- 1 root root 0 Sep 5 04:02 messages.1 -rw------- 1 root root 0 Sep 5 04:02 secure.1 -rw------- 1 root root 0 Sep 5 04:02 spooler.1 -rw------- 1 root root 0 Sep 5 04:02 xenstored-access.log.1 -rw------- 1 root root 2440 Sep 5 04:02 cron.2.gz -rw------- 1 root root 8110 Sep 5 04:02 daemon.log.2.gz -rw-r--r-- 1 root root 0 Sep 5 04:02 interface-rename.log.1 -rw------- 1 root root 132 Sep 5 04:02 user.log.2.gz -rw------- 1 root root 409473 Sep 5 04:01 audit.log.2.gz -rw------- 1 root root 323003 Sep 5 04:01 SMlog.2.gz -rw------- 1 root root 2189 Sep 5 04:00 xcp-rrdd-plugins.log.2.gz -rw------- 1 root root 2112543 Sep 5 00:39 xensource.log.2.gz -rw-r--r-- 1 root root 20 Sep 4 04:02 boot.log.2.gz -rw------- 1 root root 20 Sep 4 04:02 kern.log.2.gz -rw------- 1 root root 20 Sep 4 04:02 xenstored-access.log.2.gz -rw------- 1 root root 2417 Sep 4 04:02 cron.3.gz -rw------- 1 root root 7605 Sep 4 04:02 daemon.log.3.gz -rw-r--r-- 1 root root 20 Sep 4 04:02 interface-rename.log.2.gz -rw------- 1 root root 20 Sep 4 04:02 maillog.2.gz -rw------- 1 root root 20 Sep 4 04:02 messages.2.gz -rw------- 1 root root 20 Sep 4 04:02 secure.2.gz -rw------- 1 root root 20 Sep 4 04:02 spooler.2.gz -rw------- 1 root root 135 Sep 4 04:02 user.log.3.gz -rw------- 1 root root 409148 Sep 4 04:01 audit.log.3.gz -rw------- 1 root root 323042 Sep 4 04:01 SMlog.3.gz -rw------- 1 root root 2192 Sep 4 04:00 xcp-rrdd-plugins.log.3.gz -rw------- 1 root root 2112497 Sep 4 00:39 xensource.log.3.gz -rw------- 1 root root 20 Sep 3 04:02 xenstored-access.log.3.gz -rw-r--r-- 1 root root 20 Sep 3 04:02 boot.log.3.gz -rw-r--r-- 1 root root 20 Sep 3 04:02 interface-rename.log.3.gz -rw------- 1 root root 20 Sep 3 04:02 kern.log.3.gz -rw------- 1 root root 20 Sep 3 04:02 maillog.3.gz -rw------- 1 root root 20 Sep 3 04:02 messages.3.gz -rw------- 1 root root 20 Sep 3 04:02 secure.3.gz -rw------- 1 root root 20 Sep 3 04:02 spooler.3.gz -rw------- 1 root root 2386 Sep 3 04:02 cron.4.gz -rw------- 1 root root 7599 Sep 3 04:02 daemon.log.4.gz -rw------- 1 root root 132 Sep 3 04:02 user.log.4.gz -rw------- 1 root root 409287 Sep 3 04:01 audit.log.4.gz -rw------- 1 root root 323073 Sep 3 04:01 SMlog.4.gz -rw------- 1 root root 2195 Sep 3 03:59 xcp-rrdd-plugins.log.4.gz -rw------- 1 root root 2113429 Sep 3 00:39 xensource.log.4.gz -rw------- 1 root root 509 Sep 2 13:40 secure.4.gz -rw-r--r-- 1 root root 20 Sep 2 04:02 boot.log.4.gz -rw------- 1 root root 20 Sep 2 04:02 kern.log.4.gz -rw------- 1 root root 20 Sep 2 04:02 maillog.4.gz -rw------- 1 root root 20 Sep 2 04:02 messages.4.gz -rw------- 1 root root 20 Sep 2 04:02 spooler.4.gz -rw------- 1 root root 20 Sep 2 04:02 xenstored-access.log.4.gz -rw------- 1 root root 2415 Sep 2 04:02 cron.5.gz -rw------- 1 root root 7695 Sep 2 04:02 daemon.log.5.gz -rw-r--r-- 1 root root 20 Sep 2 04:02 interface-rename.log.4.gz -rw------- 1 root root 132 Sep 2 04:02 user.log.5.gz -rw------- 1 root root 409466 Sep 2 04:01 audit.log.5.gz -rw------- 1 root root 323045 Sep 2 04:01 SMlog.5.gz -rw------- 1 root root 2184 Sep 2 03:59 xcp-rrdd-plugins.log.5.gz -rw------- 1 root root 2113136 Sep 2 00:39 xensource.log.5.gz -rw------- 1 root root 684 Sep 1 15:18 secure.5.gz -rw------- 1 root root 128 Sep 1 15:18 kern.log.5.gz -rw------- 1 root utmp 384 Sep 1 11:27 btmp -rw------- 1 root root 20 Sep 1 04:02 xenstored-access.log.5.gz -rw-r--r-- 1 root root 20 Sep 1 04:02 boot.log.5.gz -rw-r--r-- 1 root root 20 Sep 1 04:02 interface-rename.log.5.gz -rw------- 1 root root 20 Sep 1 04:02 maillog.5.gz -rw------- 1 root root 20 Sep 1 04:02 messages.5.gz -rw------- 1 root root 20 Sep 1 04:02 spooler.5.gz -rw------- 1 root root 2406 Sep 1 04:02 cron.6.gz -rw------- 1 root root 8042 Sep 1 04:02 daemon.log.6.gz -rw------- 1 root root 132 Sep 1 04:02 user.log.6.gz -rw------- 1 root root 409421 Sep 1 04:01 audit.log.6.gz -rw------- 1 root root 323078 Sep 1 04:01 SMlog.6.gz -rw------- 1 root root 2208 Sep 1 03:58 xcp-rrdd-plugins.log.6.gz -rw------- 1 root root 2113430 Sep 1 00:39 xensource.log.6.gz -
Yeah, until you run out of space. Space is the bigger issue than running out of read/write ares on the flash.
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@BRRABill said in Final Call ... XenServer Boot Media:
In 6.5, the configuration was located in /var/lib/syslong.conf, as stated in that article.
Actually the article said that it was NOT this for 6.5. The article never looked past 6.2 and didn't know where it had moved to.
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@BRRABill said in Final Call ... XenServer Boot Media:
So seeing this, what would you think the next logical step would be to accomplish what I want.
And by association, what anyone running XS off USB would want?
Well, the current file (before you add the remote) tells all of those things to log to the local files. Then you add a line that tells it to, after writing to individual local files, also send copies to the remote syslog server.
So if you don't want it to write locally, you comment out each of the lines that tell it what to write locally.
It should be that simple. Adding the remote tells it to send the logs, but in no ways tells it NOT to change the local writing. Just comment out the local writing. -
@DustinB3403 said in Final Call ... XenServer Boot Media:
I would still assume based on what you've presented that you need to comment out the local storage folders on both XS6.5 and XS7 to disable logging locally.
The
*.*(at the very end) what purpose does that server?That last thing is some kind of catchall.
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@DustinB3403 said in Final Call ... XenServer Boot Media:
The
*.*(at the very end) what purpose does that server?I would guess that this line is what is controlling the local logging. I would remove or comment it out to test this theory.
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@scottalanmiller said in Final Call ... XenServer Boot Media:
@BRRABill said in Final Call ... XenServer Boot Media:
So seeing this, what would you think the next logical step would be to accomplish what I want.
And by association, what anyone running XS off USB would want?
Well, the current file (before you add the remote) tells all of those things to log to the local files. Then you add a line that tells it to, after writing to individual local files, also send copies to the remote syslog server.
So if you don't want it to write locally, you comment out each of the lines that tell it what to write locally.
It should be that simple. Adding the remote tells it to send the logs, but in no ways tells it NOT to change the local writing. Just comment out the local writing.Right, and that is what gets overwritten.
Let me try it and see what happens.
I'll report right back.
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@BRRABill said in Final Call ... XenServer Boot Media:
@DustinB3403 said in Final Call ... XenServer Boot Media:
I would still assume based on what you've presented that you need to comment out the local storage folders on both XS6.5 and XS7 to disable logging locally.
The . (at the very end) what purpose does that server?
No idea.
And I wonder if we really NEED those logs.
It's just to disable defaults. It's meaningless given the remote command that you've added. Feel free to comment it out or delete it as you have overridden it already.
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@scottalanmiller said in Final Call ... XenServer Boot Media:
@BRRABill said in Final Call ... XenServer Boot Media:
@DustinB3403 said in Final Call ... XenServer Boot Media:
I would still assume based on what you've presented that you need to comment out the local storage folders on both XS6.5 and XS7 to disable logging locally.
The . (at the very end) what purpose does that server?
No idea.
And I wonder if we really NEED those logs.
It's just to disable defaults. It's meaningless given the remote command that you've added. Feel free to comment it out or delete it as you have overridden it already.
So, you don't think there are also things that might not get sent to the remote syslog server? I guess we could test that as well.
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@BRRABill said in Final Call ... XenServer Boot Media:
@scottalanmiller said in Final Call ... XenServer Boot Media:
@BRRABill said in Final Call ... XenServer Boot Media:
So seeing this, what would you think the next logical step would be to accomplish what I want.
And by association, what anyone running XS off USB would want?
Well, the current file (before you add the remote) tells all of those things to log to the local files. Then you add a line that tells it to, after writing to individual local files, also send copies to the remote syslog server.
So if you don't want it to write locally, you comment out each of the lines that tell it what to write locally.
It should be that simple. Adding the remote tells it to send the logs, but in no ways tells it NOT to change the local writing. Just comment out the local writing.Right, and that is what gets overwritten.
Let me try it and see what happens.
I'll report right back.
Wow, it kept the settings. That is promising!
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@BRRABill said in Final Call ... XenServer Boot Media:
@BRRABill said in Final Call ... XenServer Boot Media:
@scottalanmiller said in Final Call ... XenServer Boot Media:
@BRRABill said in Final Call ... XenServer Boot Media:
So seeing this, what would you think the next logical step would be to accomplish what I want.
And by association, what anyone running XS off USB would want?
Well, the current file (before you add the remote) tells all of those things to log to the local files. Then you add a line that tells it to, after writing to individual local files, also send copies to the remote syslog server.
So if you don't want it to write locally, you comment out each of the lines that tell it what to write locally.
It should be that simple. Adding the remote tells it to send the logs, but in no ways tells it NOT to change the local writing. Just comment out the local writing.Right, and that is what gets overwritten.
Let me try it and see what happens.
I'll report right back.
Wow, it kept the settings. That is promising!
So show us your log config file. Was this on XS6.5 or XS7?
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@DustinB3403 said in Final Call ... XenServer Boot Media:
@BRRABill said in Final Call ... XenServer Boot Media:
@BRRABill said in Final Call ... XenServer Boot Media:
@scottalanmiller said in Final Call ... XenServer Boot Media:
@BRRABill said in Final Call ... XenServer Boot Media:
So seeing this, what would you think the next logical step would be to accomplish what I want.
And by association, what anyone running XS off USB would want?
Well, the current file (before you add the remote) tells all of those things to log to the local files. Then you add a line that tells it to, after writing to individual local files, also send copies to the remote syslog server.
So if you don't want it to write locally, you comment out each of the lines that tell it what to write locally.
It should be that simple. Adding the remote tells it to send the logs, but in no ways tells it NOT to change the local writing. Just comment out the local writing.Right, and that is what gets overwritten.
Let me try it and see what happens.
I'll report right back.
Wow, it kept the settings. That is promising!
So show us your log config file. Was this on XS6.5 or XS7?
On XS7.
I'm keeping an eye on /var/log to see if anything writes there first.
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Most of the files seem to have stopped.
It's these files I am watching...
-rw-r--r-- 1 root root 38273316 Sep 6 11:25 lastlog -rw-rw-r-- 1 root utmp 43776 Sep 6 11:25 wtmp -rw------- 1 root utmp 768 Sep 6 11:21 btmp drwxr-xr-x 2 root root 4096 Sep 6 11:20 blktap -rw-r--r-- 1 root root 792 Sep 6 11:16 ovs-xapi-sync.log -rw-r--r-- 1 root root 2628 Sep 6 11:15 ovs-ctl.log -rw-r--r-- 1 root root 1784 Sep 6 11:14 restoreeswitchcfg.log -rw-r--r-- 1 root root 348 Sep 6 11:14 interface-rename.log -rw-r--r-- 1 root root 128 Sep 6 11:14 xenstored.log -rw-r--r-- 1 root root 11212 Sep 6 11:14 boot.log -
@BRRABill updates....updates....
