handle sysvinit

roles/kubernetes/node/tasks/install.yml

@@ -2,6 +2,17 @@
 - name: Write kubelet systemd init file
   template: src=kubelet.service.j2 dest=/etc/systemd/system/kubelet.service backup=yes
   notify: restart kubelet
+  when: init_system == "systemd"
+
+- name: Write kubelet initd script
+  template: src=deb-kubelet.initd.j2 dest=/etc/init.d/kubelet owner=root mode=755 backup=yes
+  notify: restart reloaded-kubelet
+  when: init_system == "sysvinit" and ansible_os_family == "Debian"
+
+- name: Write kubelet initd script
+  template: src=rh-kubelet.initd.j2 dest=/etc/init.d/kubelet owner=root mode=755 backup=yes
+  notify: restart reloaded-kubelet
+  when: init_system == "sysvinit" and ansible_os_family == "RedHat"
 
 - name: Install kubelet binary
   copy:
@@ -23,4 +34,4 @@
     mode=0755
   when: kube_network_plugin == "calico"
   notify:
-    - restart kubelet
\ No newline at end of file
+    - restart kubelet

roles/kubernetes/node/tasks/main.yml

@@ -28,7 +28,7 @@
     - secrets
 
 - name: Write kubelet config file
-  template: src=kubelet.j2 dest={{ kube_config_dir }}/kubelet.conf backup=yes
+  template: src=kubelet.j2 dest={{ kube_config_dir }}/kubelet backup=yes
   notify:
     - restart kubelet
 

roles/kubernetes/node/templates/deb-kubelet.initd.j2

+#!/bin/bash
+#
+### BEGIN INIT INFO
+# Provides:   kubelet 
+# Required-Start:    $local_fs $network $syslog
+# Required-Stop:
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Short-Description: The Kubernetes node container manager
+# Description:
+#   The Kubernetes container manager maintains docker state against a state file.
+### END INIT INFO
+
+
+# PATH should only include /usr/* if it runs after the mountnfs.sh script
+PATH=/sbin:/usr/sbin:/bin:/usr/bin
+DESC="The Kubernetes container manager"
+NAME=kubelet
+DAEMON={{ bin_dir }}/kubelet
+DAEMON_ARGS=""
+DAEMON_LOG_FILE=/var/log/$NAME.log
+PIDFILE=/var/run/$NAME.pid
+SCRIPTNAME=/etc/init.d/$NAME
+DAEMON_USER=root
+
+# Exit if the package is not installed
+[ -x "$DAEMON" ] || exit 0
+
+# Read configuration variable file if it is present
+[ -r /etc/kubernetes/$NAME ] && . /etc/kubernetes/$NAME
+
+# Define LSB log_* functions.
+# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
+# and status_of_proc is working.
+. /lib/lsb/init-functions
+
+#
+# Function that starts the daemon/service
+#
+do_start()
+{
+        # Avoid a potential race at boot time when both monit and init.d start
+        # the same service
+        PIDS=$(pidof $DAEMON)
+        for PID in ${PIDS}; do
+            kill -9 $PID
+	done
+
+        # Return
+        #   0 if daemon has been started
+        #   1 if daemon was already running
+        #   2 if daemon could not be started
+        start-stop-daemon --start --quiet --background --no-close \
+                --make-pidfile --pidfile $PIDFILE \
+                --exec $DAEMON -c $DAEMON_USER --test > /dev/null \
+                || return 1
+        start-stop-daemon --start --quiet --background --no-close \
+                --make-pidfile --pidfile $PIDFILE \
+                --exec $DAEMON -c $DAEMON_USER -- \
+                $DAEMON_ARGS >> $DAEMON_LOG_FILE 2>&1 \
+                || return 2
+}
+
+#
+# Function that stops the daemon/service
+#
+do_stop()
+{
+        # 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
+        # Many daemons don't delete their pidfiles when they exit.
+        rm -f $PIDFILE
+        return "$RETVAL"
+}
+
+
+case "$1" in
+  start)
+        log_daemon_msg "Starting $DESC" "$NAME"
+        do_start
+        case "$?" in
+                0|1) log_end_msg 0 || exit 0 ;;
+                2) log_end_msg 1 || exit 1 ;;
+        esac
+        ;;
+  stop)
+        log_daemon_msg "Stopping $DESC" "$NAME"
+        do_stop
+        case "$?" in
+                0|1) log_end_msg 0 ;;
+                2) exit 1 ;;
+        esac
+        ;;
+  status)
+        status_of_proc -p $PIDFILE "$DAEMON" "$NAME" && exit 0 || exit $?
+        ;;
+
+  restart|force-reload)
+        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|status|restart|force-reload}" >&2
+        exit 3
+        ;;
+esac

roles/kubernetes/node/templates/kubelet.j2

@@ -22,3 +22,7 @@ KUBELET_NETWORK_PLUGIN="--network_plugin={{ kube_network_plugin }}"
 {% endif %}
 # Should this cluster be allowed to run privileged docker containers
 KUBE_ALLOW_PRIV="--allow_privileged=true"
+{% if init_system == "sysvinit" %}
+DAEMON_ARGS="$KUBE_LOGTOSTDERR $KUBE_LOG_LEVEL $KUBE_ALLOW_PRIV $KUBELET_API_SERVER $KUBELET_ADDRESS \
+$KUBELET_HOSTNAME $KUBELET_REGISTER_NODE $KUBELET_ARGS $KUBELET_ARGS $KUBELET_NETWORK_PLUGIN"
+{% endif %}

roles/kubernetes/node/templates/rh-kubelet.initd.j2

+#!/bin/sh
+#
+#       /etc/rc.d/init.d/kubelet
+#
+# chkconfig:   2345 95 95
+# description: Daemon for kubelet (kubernetes.io)
+
+### BEGIN INIT INFO
+# Provides:       kubelet
+# Required-Start: $local_fs $network $syslog cgconfig
+# Required-Stop:
+# Should-Start:
+# Should-Stop:
+# Default-Start: 2 3 4 5
+# Default-Stop:  0 1 6
+# Short-Description: start and stop kubelet
+# Description:
+#   The Kubernetes container manager maintains docker state against a state file.
+### END INIT INFO
+
+# Source function library.
+. /etc/rc.d/init.d/functions
+
+prog="kubelet"
+exec="{{ bin_dir }}/$prog"
+pidfile="/var/run/$prog.pid"
+lockfile="/var/lock/subsys/$prog"
+logfile="/var/log/$prog"
+
+[ -e /etc/kubernetes/$prog ] && . /etc/kubernetes/$prog
+
+prestart() {
+    service cgconfig status > /dev/null
+
+    if [[ $? != 0 ]]; then
+        service cgconfig start
+    fi
+
+}
+
+start() {
+    if [ ! -x $exec ]; then
+      if [ ! -e $exec ]; then
+        echo "Docker executable $exec not found"
+      else
+        echo "You do not have permission to execute the Docker executable $exec"
+      fi	      
+      exit 5
+    fi
+
+    check_for_cleanup
+
+    if ! [ -f $pidfile ]; then
+        prestart
+        printf "Starting $prog:\t"
+        echo "\n$(date)\n" >> $logfile
+        $exec $DAEMON_ARGS &>> $logfile &
+        pid=$!
+        touch $lockfile
+        success
+        echo
+    else
+        failure
+        echo
+        printf "$pidfile still exists...\n"
+        exit 7
+    fi
+}
+
+stop() {
+    echo -n $"Stopping $prog: "
+    killproc -p $pidfile -d 300 $prog
+    retval=$?
+    echo
+    [ $retval -eq 0 ] && rm -f $lockfile
+    return $retval
+}
+
+restart() {
+    stop
+    start
+}
+
+reload() {
+    restart
+}
+
+force_reload() {
+    restart
+}
+
+rh_status() {
+    status -p $pidfile $prog
+}
+
+rh_status_q() {
+    rh_status >/dev/null 2>&1
+}
+
+
+check_for_cleanup() {
+    if [ -f ${pidfile} ]; then
+        /bin/ps -fp $(cat ${pidfile}) > /dev/null || rm ${pidfile}
+    fi
+}
+
+case "$1" in
+    start)
+        rh_status_q && exit 0
+        $1
+        ;;
+    stop)
+        rh_status_q || exit 0
+        $1
+        ;;
+    restart)
+        $1
+        ;;
+    reload)
+        rh_status_q || exit 7
+        $1
+        ;;
+    force-reload)
+        force_reload
+        ;;
+    status)
+        rh_status
+        ;;
+    condrestart|try-restart)
+        rh_status_q || exit 0
+        restart
+        ;;
+    *)
+        echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"
+        exit 2
+esac
+
+exit $?