Documentation
Rate This Document
Findability
Accuracy
Completeness
Readability
SubmitClose

Configuring Logs

DPDK logs are output to dmesg by default. To facilitate fault locating, modify configuration files to output DPDK logs to OVS log files and configure log control methods. Perform the following configuration as required.

  1. Create a DPDK log directory.
    1
    mkdir -p /var/log/dpdk
  2. Configure the Rsyslog configuration file of DPDK.
    1. Create a dpdk.conf file in the /etc/rsyslog.d directory.
      1
      vim /etc/rsyslog.d/dpdk.conf
    2. Press I to enter the insert mode and add the following content:
       1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
      #DPDK_LOG_TAG "LibLogTag_DPDK"
template(name="template-dpdk" type="string" string="%TIMESTAMP:::date-rfc3339%|%syslogseverity-text%|%programname%[%PROCID%]|%$!msg_pre%%$!msg_after%\n")
$outchannel dpdk,/var/log/dpdk/dpdk.log,2097152,/opt/esyslog/esyslog_log_rsyslog_dump.sh /var/log/dpdk/dpdk.log dpdk

if ($msg contains "LibLogTag_DPDK" and $syslogseverity <= 7 ) then {
set $!msg_pre = field($msg,"LibLogTag_DPDK|",1);
set $!msg_after = field($msg,"LibLogTag_DPDK|",2);
:omfile:$dpdk;template-dpdk
stop
}


if ($msg contains "LibLogTag_DPDK" and $syslogseverity > 7 ) then {
/dev/null
stop
}
    3. Press Esc to exit the insert mode. Input :wq! and press Enter to save the file and exit.
  3. Configure the DPDK log rollback file.
    1. Create an /etc/logrotate.d/dpdk file.
      vim /etc/logrotate.d/dpdk
    2. Press I to enter the insert mode and add the following content:
      1
2
3
4
5
6
7
8
9
      /var/log/dpdk/dpdk.log {
hourly
compress
missingok
notifempty
maxsize 2048k
rotate 50
copytruncate
}
    3. Press Esc to exit the insert mode. Input :wq! and press Enter to save the file and exit.
  4. Configure the OVS log rollback file.
    1. Create an /etc/logrotate.d/openvswitch file.
      1
      vim /etc/logrotate.d/openvswitch
    2. Press I to enter the insert mode and add the following content:
       1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
      # Copyright (C) 2009, 2010, 2011, 2012 Nicira, Inc.
#
# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved.  This file is offered as-is,
# without warranty of any kind.

/var/log/openvswitch/*.log {
    su root root
    hourly
    compress
    missingok
    maxsize 2048k
    rotate 50
    sharedscripts
    postrotate
        # Tell Open vSwitch daemons to reopen their log files
        if [ -d /var/run/openvswitch ]; then
            for ctl in /var/run/openvswitch/*.ctl; do
                ovs-appctl -t "$ctl" vlog/reopen 2>/dev/null || :
            done
        fi36
    endscript
}
    3. Press Esc to exit the insert mode. Input :wq! and press Enter to save the file and exit.
  5. Configure the scheduled log processing file.
    1. Create an ovslogrotate file in /etc/cron.hourly.
      1
      vim /etc/cron.hourly/ovslogrotate
    2. Press I to enter the insert mode and add the following content:
       1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
      #!/bin/sh

/usr/sbin/logrotate -s /var/lib/logrotate/logrotate.status /etc/logrotate.d/dpdk
EXITVALUE=$?
if [ $EXITVALUE != 0 ]; then
    /usr/bin/logger -t logrotate "ALERT exited abnormally with [$EXITVALUE]"
fi

/usr/sbin/logrotate -s /var/lib/logrotate/logrotate.status /etc/logrotate.d/openvswitch
EXITVALUE=$?
if [ $EXITVALUE != 0 ]; then
    /usr/bin/logger -t logrotate "ALERT exited abnormally with [$EXITVALUE]"
fi

exit 0
    3. Press Esc to exit the insert mode. Input :wq! and press Enter to save the file and exit.
    4. Add the read and execute permissions to the file.
      1
2
      chmod 0644 /etc/cron.hourly/ovslogrotate
chmod +x /etc/cron.hourly/ovslogrotate