10-05-2010
Quote:
Nothing bad happens if you delete a file in use.
My observation is different. If we delete "catalina.out" from a tomcat web server logs folder. Tomcat would not create another log,, until we restart tomcat. Where as other applications do create a new log file.
I am trying to find a safe way to do a generic log file rotation including logs like "catalina.out". Also try to know if a file is being actively used or not to make a better decision before log/file rotation.
When I query using lsof I get this -->
Quote:
> lsof ../jakarta/logs/catalina.out
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 1162 <UID> 1w VREG 314,7 1284251 19505649 ../jakarta/logs/catalina.out
java 1162 <UID> 2w VREG 314,7 1284251 19505649 ../jakarta/logs/catalina.out
What is the meaning of FD --> 1w 2w ?
2. What is the difference between 1w, 2w(in lsof output) Vs <PID>o (o in fuser output) ?
Quote:
> fuser -fu ../jakarta/logs/catalina.out
../jakarta/logs/catalina.out: 13601o(<userid>)
Last edited by kchinnam; 10-05-2010 at 02:32 PM..
Reason: masking secure info
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LEARN ABOUT SUSE
ocf_heartbeat_tomcat
OCF_HEARTBEAT_TOMCAT(7) OCF resource agents OCF_HEARTBEAT_TOMCAT(7)
NAME
ocf_heartbeat_tomcat - Manages a Tomcat servlet environment instance
SYNOPSIS
tomcat [start | stop | status | monitor | meta-data | validate-all]
DESCRIPTION
Resource script for tomcat. It manages a Tomcat instance as an HA resource.
SUPPORTED PARAMETERS
tomcat_name
The name of the resource (optional, string, no default)
script_log
A destination of the log of this script (optional, string, no default)
tomcat_stop_timeout
Time-out at the time of the stop (optional, integer, no default)
tomcat_suspend_trialcount
The re-try number of times awaiting a stop (optional, integer, no default)
tomcat_user
A user name to start a resource (optional, string, no default)
statusurl
URL for state confirmation (optional, string, no default)
java_home
Home directory of the Java (required, string, no default)
catalina_home
Home directory of Tomcat (required, string, no default)
catalina_pid
A PID file name of Tomcat (optional, string, no default)
tomcat_start_opts
Tomcat start options (optional, string, no default)
catalina_opts
Catalina options (optional, string, no default)
catalina_rotate_log
Rotate catalina.out flag (optional, string, no default)
catalina_rotatetime
Time span of the rotate catalina.out (optional, integer, no default)
SUPPORTED ACTIONS
This resource agent supports the following actions (operations):
start
Starts the resource. Suggested minimum timeout: 60s.
stop
Stops the resource. Suggested minimum timeout: 120s.
status
Performs a status check. Suggested minimum timeout: 60.
monitor
Performs a detailed status check. Suggested minimum timeout: 30s. Suggested interval: 10s.
meta-data
Retrieves resource agent metadata (internal use only). Suggested minimum timeout: 5s.
validate-all
Performs a validation of the resource configuration. Suggested minimum timeout: 5.
EXAMPLE
The following is an example configuration for a tomcat resource using the crm(8) shell:
primitive example_tomcat ocf:heartbeat:tomcat
params
java_home=string
catalina_home=string
op monitor depth="0" timeout="30s" interval="10s"
SEE ALSO
http://www.linux-ha.org/wiki/tomcat_(resource_agent)
AUTHOR
Linux-HA contributors (see the resource agent source for information about individual authors)
resource-agents 1.0.3 07/05/2010 OCF_HEARTBEAT_TOMCAT(7)