Skip to content

Instantly share code, notes, and snippets.

@stojg

stojg/consul

Created December 1, 2014 04:51
Show Gist options

  • Select an option

    Learn more about clone URLs
  • Save stojg/d0d96a123761830c0ff1 to your computer and use it in GitHub Desktop.

Select an option

Learn more about clone URLs
Save stojg/d0d96a123761830c0ff1 to your computer and use it in GitHub Desktop.
Download ZIP

Revisions

  1. Stig Lindqvist created this gist Dec 1, 2014.
    167 changes: 167 additions & 0 deletions consul
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,167 @@
    #!/bin/sh
    ### BEGIN INIT INFO
    # Provides: consul
    # Required-Start: $local_fs $remote_fs
    # Required-Stop: $local_fs $remote_fs
    # Default-Start: 2 3 4 5
    # Default-Stop: S 0 1 6
    # Short-Description: Consul service discovery framework
    # Description: Healthchecks local services and registers
    # them in a central consul database.
    ### END INIT INFO

    # Do NOT "set -e"

    # PATH should only include /usr/* if it runs after the mountnfs.sh script
    PATH=/usr/sbin:/usr/bin:/sbin:/bin
    DESC="Consul service discovery framework"
    NAME=consul
    DAEMON=/bin/$NAME
    DAEMON_ARGS="agent -config-dir /etc/consul"
    USER=root
    PIDFILE=/var/run/$NAME.pid
    SCRIPTNAME=/etc/init.d/$NAME

    # Exit if the package is not installed
    [ -x "$DAEMON" ] || exit 0

    # Read configuration variable file if it is present
    [ -r /etc/default/$NAME ] && . /etc/default/$NAME

    # Load the VERBOSE setting and other rcS variables
    [ -f /etc/default/rcS ] && . /etc/default/rcS

    # Define LSB log_* functions.
    # Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
    . /lib/lsb/init-functions

    #
    # Function that starts the daemon/service
    #
    do_start()
    {
    # Return
    # 0 if daemon has been started
    # 1 if daemon was already running
    # 2 if daemon could not be started
    echo "Starting consul and backgrounding"
    start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --chuid $USER --background --make-pidfile --test > /dev/null \
    || return 1
    start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --chuid $USER --background --make-pidfile -- \
    $DAEMON_ARGS \
    || return 2

    echo -n "Waiting for consul daemon to be listening..."
    for i in `seq 1 30`; do
    if ! start-stop-daemon --quiet --stop --test --pidfile $PIDFILE --exec $DAEMON --user $USER; then
    echo " FAIL: consul process died"
    return 2
    fi
    if "$DAEMON" info >/dev/null; then
    echo " OK"
    return 0
    fi
    echo -n .
    sleep 1
    done
    echo " FAIL: consul process is alive, but is not listening."
    return 2
    }

    #
    # Function that stops the daemon/service
    #
    do_stop()
    {
    # first try doing this gracefully
    "$DAEMON" leave
    # Return
    # 0 if daemon has been stopped
    # 1 if daemon was already stopped
    # 2 if daemon could not be stopped
    # other if a failure occurred
    start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME
    RETVAL="$?"
    [ "$RETVAL" = 2 ] && return 2
    # Wait for children to finish too if this is a daemon that forks
    # and if the daemon is only ever run from this initscript.
    # If the above conditions are not satisfied then add some other code
    # that waits for the process to drop all resources that could be
    # needed by services started subsequently. A last resort is to
    # sleep for some time.
    start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON
    [ "$?" = 2 ] && return 2
    # Many daemons don't delete their pidfiles when they exit.
    rm -f $PIDFILE
    return "$RETVAL"
    }

    #
    # Function that sends a SIGHUP to the daemon/service
    #
    do_reload() {
    #
    # If the daemon can reload its configuration without
    # restarting (for example, when it is sent a SIGHUP),
    # then implement that here.
    #
    start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
    return 0
    }

    case "$1" in
    start)
    [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
    do_start
    case "$?" in
    0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
    2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
    esac
    ;;
    stop)
    [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
    do_stop
    case "$?" in
    0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
    2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
    esac
    ;;
    #reload|force-reload)
    #
    # If do_reload() is not implemented then leave this commented out
    # and leave 'force-reload' as an alias for 'restart'.
    #
    #log_daemon_msg "Reloading $DESC" "$NAME"
    #do_reload
    #log_end_msg $?
    #;;
    restart|force-reload)
    #
    # If the "reload" option is implemented then remove the
    # 'force-reload' alias
    #
    log_daemon_msg "Restarting $DESC" "$NAME"
    do_stop
    case "$?" in
    0|1)
    do_start
    case "$?" in
    0) log_end_msg 0 ;;
    1) log_end_msg 1 ;; # Old process is still running
    *) log_end_msg 1 ;; # Failed to start
    esac
    ;;
    *)
    # Failed to stop
    log_end_msg 1
    ;;
    esac
    ;;
    *)
    #echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
    echo "Usage: $SCRIPTNAME {start|stop|restart|force-reload}" >&2
    exit 3
    ;;
    esac

    :