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Fix table in logging page
This commit is contained in:
Jared Smith
parent
1fdb2ec445
commit
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1 changed files with 35 additions and 30 deletions
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@ -109,11 +109,11 @@ Run `analog` without the `-o` option to see how exactly does a fitting configura
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Also notice that it uses the same message format for remote logging as anaconda does, but you can of course modify this to specify any format you want.
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=== See also
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* [http://www.rsyslog.com/doc Rsyslog documentation]
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* link:http://www.rsyslog.com/doc[Rsyslog documentation]
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* `man tailf`
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== Remote logging via virtio
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QEMU/KVM in Fedora 13 and onwards allows one to create virtual machines with [[Features/VirtioSerial|multiple virtio char devices]] exposed to the guest machine.
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QEMU/KVM in Fedora 13 and onwards allows one to create virtual machines with link:http://fedoraprojet.org/wiki/Features/VirtioSerial[multiple virtio char devices] exposed to the guest machine.
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One such device can be used to forward anaconda logs to the host machine.
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In that way we can get logs forwarded in real time, as soon the anaconda logging subsystem is initialized (early) and not need to wait for the network to come up.
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Also, it's the only way to forward the logs in a no-network setup.
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@ -126,10 +126,10 @@ See the ascii chart below for the whole ensemble:
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----
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Anaconda--->rsyslog(guest)--->virtio(guest char device)--->kvm hypervisor--->virtio(TCP socket)
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v
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forwarded log files<---rsyslog(host)
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Anaconda--->rsyslog(guest)--->virtio(guest char device)--->kvm hypervisor--->virtio(TCP socket)
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v
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forwarded log files<---rsyslog(host)
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----
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@ -179,46 +179,51 @@ You should start seeing raw logs in the terminal once the guest machine starts b
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After every successful installation, anaconda logs are copied into `/var/log` on the system you just installed.
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To avoid name clashes with other log files there, the anaconda logs are renamed:
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{|
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! Name during installation !! Name on the target system
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|-
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| `/tmp/anaconda.log` || `/var/log/anaconda.log`
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|-
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| `/tmp/syslog` || `/var/log/anaconda.syslog`
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|-
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| `/tmp/X.log` || `/var/log/anaconda.xlog`
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|-
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| `/tmp/program.log` || `/var/log/anaconda.program.log`
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|-
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| `/tmp/storage.log` || `/var/log/anaconda.storage.log`
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|-
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| `/tmp/yum.log` || `/var/log/anaconda.yum.log`
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|-
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| `/tmp/ifcfg.log` (new in F14) || not copied
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|}
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[options="header"]
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|====
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| Name during installation | Name on the target system |
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| `/tmp/anaconda.log` | `/var/log/anaconda.log` |
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| `/tmp/syslog` | `/var/log/anaconda.syslog` |
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| `/tmp/X.log` | `/var/log/anaconda.xlog` |
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| `/tmp/program.log` | `/var/log/anaconda.program.log` |
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| `/tmp/storage.log` | `/var/log/anaconda.storage.log` |
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| `/tmp/yum.log` | `/var/log/anaconda.yum.log` |
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| `/tmp/ifcfg.log` (new in F14) | not copied |
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|====
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Starting with Fedora 15 (or post F14 Rawhide), the logs go to `/var/log/anaconda` directory on the target system, including ifcfg.log inroduced in F14.
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== Logging tips
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If you are asked to provide logs for a bugzilla, your best option is switching from the anaconda GUI to tty2 and then use scp to copy the files to your computer, e.g.:
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cd /tmp
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scp anaconda.log aklap:/home/akozumpl/
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----
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cd /tmp
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scp anaconda.log aklap:/home/akozumpl/
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----
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It is also possible to make a complete dump of a state of running anaconda process (the same dump that is compiled automatically if an unhandled exception occurs).
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To do this send the main anaconda process SIGUSR2:
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kill -USR2 `cat /var/run/anaconda.pid``
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----
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kill -USR2 `cat /var/run/anaconda.pid``
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----
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This builds a file `/tmp/anaconda-tb-?????` that also contains `anaconda.log`, `storage.log` and `syslog`.
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If you are on a KVM virtual machine and there's no scp available (stage1), you can (after setting up the network if not up already) redirect to a special tcp file, on host:
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nc -l 4444 > syslog.log
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----
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nc -l 4444 > syslog.log
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----
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on guest:
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ifconfig eth0 10.0.2.10/24 up
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grep "" /tmp/syslog > /dev/tcp/10.0.2.2/4444
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----
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ifconfig eth0 10.0.2.10/24 up
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grep "" /tmp/syslog > /dev/tcp/10.0.2.2/4444
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----
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== To do
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* The current list of logging requirements and tasks is maintained in bugzilla [https://bugzilla.redhat.com/show_bug.cgi?id=524980 524980].
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* A support for KVM's virtio logging is coming later [https://bugzilla.redhat.com/show_bug.cgi?id=576439 576439].
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