ExecuteInAllVEs - Revision history

HostGIS at 15:23, 6 January 2008

2008-01-06T15:23:33Z

HostGIS at 15:23, 6 January 2008

2008-01-06T15:23:20Z

HostGIS at 15:22, 6 January 2008

2008-01-06T15:22:42Z

HostGIS at 15:20, 6 January 2008

2008-01-06T15:20:19Z

HostGIS at 18:47, 3 January 2008

2008-01-03T18:47:32Z

HostGIS at 18:47, 3 January 2008

2008-01-03T18:47:03Z

HostGIS at 18:44, 3 January 2008

2008-01-03T18:44:31Z

HostGIS at 18:44, 3 January 2008

2008-01-03T18:44:09Z

HostGIS at 18:43, 3 January 2008

2008-01-03T18:43:14Z

HostGIS: program code, no wording

2008-01-03T18:42:48Z

program code, no wording

New page

{{{
#!/bin/bash
CONFDIR="/etc/vz/conf"
if [ "$1" == "" ]; then
echo "$0 -- Execute a command on all VEs"
echo ""
echo "Example: vzexec service httpd restart"
echo ""
echo "Note that variables are expanded in the host's shell, and use '' to prevent this."
echo "Example: vzexec echo \$PWD and vzexec 'echo \$PWD' are different."
exit
fi
for veconf in $CONFDIR/*.conf ; do
veid=`basename $veconf .conf`
if [ "$veid" == "0" ]; then continue; fi
vename=`grep ^NAME $veconf | head -1 | sed -e 's@NAME=@@' | sed -e 's@"@@g'`
echo "*** VE $veid ($vename)"
vzctl exec $veid $@
done
}}}

@@ Line 6: / Line 6: @@
 </code>
-Knowing this, you can also save some typing later by making a simple utility out of it. I like to call this ''/usr/sbin/vzexec'' so I can later just say ''vzexec apachectl restart''
+Knowing this, you can also save some typing later by making a simple utility out of it.
 <code>
    #!/bin/bash

@@ Line 1: / Line 1: @@
 I found myself often faced with a need to run the same command in all VEs, e.g. ''apachectl restart'' to restart all webservers or ''dmesg | tail'' to see the latest news from everybody.
-At its core is just this simple tidbit: a for loop around vzlist.
+You can loop through all VEs and execute this this easily:
 <code>
    for veid in `vzlist -Hoveid`; do vzctl exec $veid COMMAND; done

@@ Line 1: / Line 1: @@
-I found myself often faced with a need to run the same command in all VEs, e.g. ''apachectl restart'' to restart all webservers or ''dmesg | tail'' to see the latest news from everybody. This simple utility is just a loop around ''vzctl exec'' but I find it very handy.
+I found myself often faced with a need to run the same command in all VEs, e.g. ''apachectl restart'' to restart all webservers or ''dmesg | tail'' to see the latest news from everybody.
 <code>
    #!/bin/bash

← Older revision		Revision as of 18:47, 3 January 2008
Line 1:		Line 1:
		+	I found myself often faced with a need to run the same command in all VEs, e.g. ''apachectl restart'' to restart all webservers or ''dmesg \| tail'' to see the latest news from everybody. This simple utility is just a loop around ''vzctl exec'' but I find it very handy.
		+
	<code>		<code>
	#!/bin/bash		#!/bin/bash

@@ Line 4: / Line 4: @@
    #!/bin/bash
    # vzexec -- execute a command on all VEs
    if [ "$1" == "" ]; then
      echo "$0 -- Execute a command on all VEs"
@@ Line 14: / Line 13: @@
      exit
    fi
-   for veconf in $CONFDIR/*.conf ; do
+   for veid in `vzlist -Hoveid`; do
-    veid=`basename $veconf .conf`
+     echo "*** VE $veid"
      vzctl exec $veid $@
    done
 </code>

@@ Line 7: / Line 7: @@
      echo "Example: vzexec service httpd restart"
      echo ""
-     echo "Note that variables are expanded in the host's shell, and use '' to prevent this."
+     echo "Note that variables are expanded in the host's shell, and use ' ' to prevent this."
      echo "Example:   vzexec echo \$PWD    and   vzexec 'echo \$PWD'   are different."
      exit