I would like to use Gentoo on Amazon EC2.
What are the right AMI for me to use?
I won't be running X unless necessary. I guess I need a server variant, if there is such a thing.
The official Gentoo AMI
amazon ec2gentoo
Related Solutions
Using sudo
I think you need to find out what interface is being used for your network and then just tell tshark about it.
Example
Network devices present on my box.
$ ip addr|grep '^[0-9]'|awk '{print $2}'
lo:
eth0:
wlan0:
Run tshark:
$ sudo tshark -i wlan0 | head -5
..start seeing output from tshark...
Using capabilities
The Amazon AMI instances are based on CentOS so you may be able to use the following steps to accomplish what you're after.
$ sudo groupadd wireshark
$ sudo usermod -a -G wireshark saml
$ setcap cap_net_raw,cap_net_admin=eip /usr/sbin/dumpcap
The above creates the Unix group wireshark, adds the user saml to it, and then adds the capabilities using the tool setcap to allow others access to the dumpcap file.
Example
$ tshark -i wlan0
Capturing on wlan0
0.000000 108.160.163.38 -> 192.168.1.20 HTTP HTTP/1.1 200 OK (text/plain)
0.087199 108.160.163.38 -> 192.168.1.20 TCP http > 38987 [ACK] Seq=180 Ack=352 Win=83 Len=0 TSV=144745749 TSER=195830096
0.253077 192.168.1.20 -> 255.255.255.255 DB-LSP-DISC Dropbox LAN sync Discovery Protocol
0.253360 192.168.1.20 -> 192.168.1.255 DB-LSP-DISC Dropbox LAN sync Discovery Protocol
0.779785 192.168.1.20 -> 74.125.225.115 HTTP HEAD / HTTP/1.1
...
You can read more about Linux' capabilities facility via the man pages, man capabilities.
References
I updated my script to following code. Although it is not able to create pidfile but it is working as I want. If anybody has better script then kindly post your answer.
#!/bin/bash
# chkconfig: 2345 95 05
# description: MY Application
# Source function library.
. /etc/init.d/functions
RETVAL=0
prog="myserver"
PIDFILE=/var/run/$prog.pid
LOCKFILE=/var/lock/subsys/$prog
PATH=/sbin:/usr/sbin:/bin:/usr/bin
JAVA=/usr/bin/java
DESC="MY Application"
DAEMON=$JAVA
DAEMON_HOME="/home/ganesh/MyServer/"
JAR=$DAEMON_HOME/MyServer.jar
DAEMON_ARGS="-Xms512m -Xmx4112m -jar $JAR"
SCRIPTNAME=/etc/init.d/myserver
#the user that will run the script
USER=root
#echo "All value sets"
start() {
if [ -f $LOCKFILE ];
then
echo "$DESC is already running. Exiting."
exit 1
else
echo -n "Starting $prog:"
cd $DAEMON_HOME
daemon --user $USER --pidfile $PIDFILE $DAEMON $DAEMON_ARGS >/dev/null 2>&1 &
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch $LOCKFILE
fi
return $RETVAL
}
stop() {
echo -n "Shutting down "$prog:
kill -9 `ps -ef | grep "$JAR" | grep -v grep | awk '{ print $2 }'`
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f $LOCKFILE
return $RETVAL
}
check_status() {
#echo -n "Checking $prog status: "
status $prog
RETVAL=$?
return $RETVAL
}
case "$1" in
start)
start
;;
stop)
stop
;;
status)
check_status
;;
restart)
stop
start
;;
*)
echo "Usage: $prog {start|stop|status|restart}"
exit 1
;;
esac
exit $RETVAL
EDIT:
Another Version of above script where I am creating pid file and using it to get status and stop the application. I think the following script is more reliable than above.
#!/bin/bash
# chkconfig: 2345 95 05
# description: MY Application
# Source function library.
. /etc/init.d/functions
RETVAL=0
prog="myserver"
PIDFILE=/var/run/$prog.pid
LOCKFILE=/var/lock/subsys/$prog
PATH=/sbin:/usr/sbin:/bin:/usr/bin
JAVA=/usr/bin/java
DESC="MY Application"
DAEMON=$JAVA
DAEMON_HOME="/home/ganesh/MyServer/"
JAR=$DAEMON_HOME/MyServer.jar
DAEMON_ARGS="-Xms512m -Xmx4112m -jar $JAR"
SCRIPTNAME=/etc/init.d/myserver
#the user that will run the script
USER=root
#echo "All value sets"
start() {
if [ -f $PIDFILE ]; then
PID=`cat $PIDFILE`
if [ -z "`pgrep $PID`" ] && [ "$PID" != "`ps aux|grep -vE 'grep|runuser|bash'|grep -w "$JAR"|awk '{print $2}'`" ]; then
printf "%s\n" "Process dead but pidfile exists"
else
printf "$prog is already running!\n"
fi
else
printf "%-50s" "Starting $prog ..."
cd $DAEMON_HOME
daemon --user $USER $DAEMON $DAEMON_ARGS >/dev/null 2>&1 &
sleep 5
PID=`ps aux|grep -vE 'grep|runuser|bash'|grep -w "$JAR"|awk '{print $2}'`
if [ -z "$PID" ]; then
printf "[ \e[31mFAIL\033[0m ]\n"
else
echo $PID > $PIDFILE
printf "[ \e[32mOK\033[0m ]\n"
fi
fi
}
stop() {
printf "%-50s" "Shutting down $prog:"
if [ -f $PIDFILE ]; then
PID=`cat $PIDFILE`
kill -HUP $PID 2>/dev/null
printf "[ \e[32mOK\033[0m ]\n"
rm -f $PIDFILE
else
printf "[ \e[31mFAIL\033[0m ]\n"
fi
}
check_status() {
printf "%-50s" "Checking $prog ..."
if [ -f $PIDFILE ]; then
PID=`cat $PIDFILE`
if [ -z "`pgrep $PID`" ] && [ "$PID" != "`ps aux|grep -vE 'grep|runuser|bash'|grep -w "$JAR"|awk '{print $2}'`" ]; then
printf "%s\n" "Process dead but pidfile exists"
else
printf "[ \e[32mRUNNING\033[0m ]\n"
fi
else
printf "[ \e[31mSTOPPED\033[0m ]\n"
fi
}
case "$1" in
start)
start
;;
stop)
stop
;;
status)
check_status
;;
restart)
stop
start
;;
*)
echo "Usage: $prog {start|stop|status|restart}"
exit 1
;;
esac
exit 1
Best Answer
I could not find an official build for EC2. The closes thing is likely going to be the Pygoscelis Papua Linux distro.
You can also peruse the Cloud Market list of images available.
If you'd rather there are other methods discussed within these resources which cover rolling your own Gentoo image from scratch.