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This [[:Category:HOWTO|HOWTO] shows how OpenVZ [[hardware node]] administrator can see a processes belonging to the host system only, or to a particular [[VE]].
== Problem ==
From [[VE0]] one can see all the processes running on the system; that includes all the processes of all [[VE]]s and the processes of the [[host system]] itself. Sometimes you just want to see the processes from the host system only. Sometimes you just want to see the processes from a particular VE.
There are many ways to achieve it.
== Solutions ==
=== "Poor man's vzps in bash" ===
Use the following script by aistis, modified by kir.
First argument is VE ID (0 for the host system), all the remaining arguments are passed to <code>ps(1)</code> utility.
<pre>
#!/bin/bash
# Usage: ./ovzps VEID [ps flags ...]
function find_ve_pids(){
local pid
local myveid=$1
local vepids=
for pid in $ALLPIDS; do
[ -f /proc/$pid/status ] || continue
veid=`grep envID /proc/$pid/status | awk -F: '{print $2}'`
if [ ${veid} = ${myveid} ]; then
VEPIDS="$VEPIDS $pid"
fi
done
echo "$vepids"
}
ALLPIDS=`ps -A -o pid --no-headers`
VEPIDS=`find_ve_pids $1`
shift
if [ "${VEPIDS}" ]; then
ps $* -p "$VEPIDS"
else
exit 0
fi
</pre>
=== Use vzprocps tools ===
Take vzprocps tools from download.openvz.org/contrib/
It is usual ps/top with -E option allowing to filter output.
If given w/o VE number, then it simply adds VEID column to its output.
== See also ==
* [http://forum.openvz.org/index.php?t=msg&th=836 forum thread #836]
[[Category: HOWTO]]
== Problem ==
From [[VE0]] one can see all the processes running on the system; that includes all the processes of all [[VE]]s and the processes of the [[host system]] itself. Sometimes you just want to see the processes from the host system only. Sometimes you just want to see the processes from a particular VE.
There are many ways to achieve it.
== Solutions ==
=== "Poor man's vzps in bash" ===
Use the following script by aistis, modified by kir.
First argument is VE ID (0 for the host system), all the remaining arguments are passed to <code>ps(1)</code> utility.
<pre>
#!/bin/bash
# Usage: ./ovzps VEID [ps flags ...]
function find_ve_pids(){
local pid
local myveid=$1
local vepids=
for pid in $ALLPIDS; do
[ -f /proc/$pid/status ] || continue
veid=`grep envID /proc/$pid/status | awk -F: '{print $2}'`
if [ ${veid} = ${myveid} ]; then
VEPIDS="$VEPIDS $pid"
fi
done
echo "$vepids"
}
ALLPIDS=`ps -A -o pid --no-headers`
VEPIDS=`find_ve_pids $1`
shift
if [ "${VEPIDS}" ]; then
ps $* -p "$VEPIDS"
else
exit 0
fi
</pre>
=== Use vzprocps tools ===
Take vzprocps tools from download.openvz.org/contrib/
It is usual ps/top with -E option allowing to filter output.
If given w/o VE number, then it simply adds VEID column to its output.
== See also ==
* [http://forum.openvz.org/index.php?t=msg&th=836 forum thread #836]
[[Category: HOWTO]]
