A shell script used to direct the stdout/stderr to the file.
Many info of the program will be printed to stdout/stderr. With logwrap, the info from stdout/stderr will be directed to the file for easy reading.
Logwrap provides many env params as follows.
| env | usage | default |
|---|---|---|
| LOGWRAP_ENABLE_LOGWRAP | whether enable logwrap feature. | true |
| LOGWRAP_ENABLE_STDERR | whether direct stderr to the log file. | true |
| LOGWRAP_ENABLE_LOGROTATE | whether enable logrotate feature. | true |
| LOGWRAP_LOGROTATE_ROTATE | rotate param of logrotate configuration. | 4 |
| LOGWRAP_LOGROTATE_CYCLE | cycle param of logrotate configuration, must be either of daily, weekly, monthly or yearly. | weekly |
| LOGWRAP_LOGROTATE_SIZE | minsize param of logroate configuration. | 100M |
| LOGWRAP_COMMAND | command wanted to exec. | $1 |
| LOGWRAP_DIR | the dir of logfile. If the LOGWRAP_DIR is set, LOGWRAP_FILE will be $LOGWRAP_DIR/$LOGWRAP_COMMAND.log | "" |
| LOGWRAP_FILE | the path of logfile. If the LOGWRAP_DIR is not set, the LOGWRAP_FILE must be set or just use the default value. | /home/$LOGWRAP_COMMAND.log |
logwrap.sh can be put on the entrypoint. The actual command should be put ont the command.
The example Dockerfile is provided in the project. And the entrypoint is set to /logwrap.sh. If the command echo hello world wants to be executed. Just execute as follows.
[root@localhost logwrap]# docker build -t logwrap:base .
[root@localhost logwrap]# docker run -it --rm -v /home:/home logwrap:base echo hello world
LOGWRAP will direct stdout to /home/echo.log
LOGWRAP ensure log dir /home
LOGWRAP enable logrotate.
LOGWRAP start crond.
LOGWRAP generate logrotate file.
LOGWRAP_COMMAND is echo
LOGROATE_FILE is /etc/logrotate.d/echo
/etc/logrotate.d/echo does not exist. Generate it.
/home/echo.log {
daily
missingok
rotate 4
compress
delaycompress
dateext
dateformat %Y-%m-%d-%s
copytruncate
size 100M
}
exec command: echo hello world
--------------------
[root@localhost logwrap]# cat /home/echo.log
hello world
Just use ./logwrap.sh + {command}. For example.
[root@localhost logwrap]# ./logwrap.sh echo hello world
LOGWRAP will direct stdout to /home/echo.log
LOGWRAP ensure log dir /home
LOGWRAP enable logrotate.
LOGWRAP found crond alreay running.
LOGWRAP generate logrotate file.
LOGWRAP_COMMAND is echo
LOGROATE_FILE is /etc/logrotate.d/echo
/etc/logrotate.d/echo alreay exist.
/home/echo.log {
daily
missingok
rotate 4
compress
delaycompress
dateext
dateformat %Y-%m-%d-%s
copytruncate
size 100M
}
exec command: echo hello world
--------------------
[root@localhost logwrap]# cat /home/echo.log
hello world
Content type
Image
Digest
Size
100.1 MB
Last updated
about 6 years ago
docker pull xuxinkun/logwrap