Add slapos node boot replacement for slapos-start

  This new command aims to be used on linux start up. It wait until
  network is up (ipv4 and ipv6), them it runs slapos node format and bang.

  It removes the .timestamp on all partitions, in order to force re-run.

setup.py

@@ -101,6 +101,7 @@ setup(name=name,
           'node report = slapos.cli.slapgrid:ReportCommand',
           'node software = slapos.cli.slapgrid:SoftwareCommand',
           'node instance = slapos.cli.slapgrid:InstanceCommand',
+          'node boot = slapos.cli.boot:BootCommand',
           # SlapOS client commands
           'console = slapos.cli.console:ConsoleCommand',
           'configure local = slapos.cli.configure_local:ConfigureLocalCommand',

slapos/cli/boot.py

+# -*- coding: utf-8 -*-
+
+import subprocess
+from time import sleep
+import socket
+import glob
+import os
+from slapos.cli.command import must_be_root
+from slapos.cli.entry import SlapOSApp
+from slapos.cli.config import ConfigCommand
+
+def _removeTimestamp(instancehome):
+    """
+      Remove .timestamp from all partitions
+    """
+    timestamp_glob_path = "%s/slappart*/.timestamp" % instancehome
+    for timestamp_path in glob.glob(timestamp_glob_path):
+       print "Removing %s" % timestamp_path
+       os.remove(timestamp_path)
+
+def _runBang(app):
+    """
+    Launch slapos node format.
+    """
+    print "[BOOT] Invoking slapos node bang..."
+    result = app.run(['node', 'bang', '-m', 'Reboot'])
+    if result == 1:
+      return 0
+    return 1
+
+def _runFormat(app):
+    """
+    Launch slapos node format.
+    """
+    print "[BOOT] Invoking slapos node format..."
+    result = app.run(['node', 'format', '--now', '--verbose'])
+    if result == 1:
+      return 0
+    return 1
+
+def _ping():
+    """ 
+    Ping a hostname
+    """
+    print "[BOOT] Invoking ping to ipv4 network..."
+    p = subprocess.Popen(
+      ["ping", "-c", "2", "www.google.com"],
+       stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    stdout, stderr = p.communicate()
+    if p.returncode == 0:
+      print "[BOOT] IPv4 network reachable..."
+      return 1
+    print "[BOOT] [ERROR] IPv4 network unreachable..."
+    return 0
+
+def _ping6():
+    """ 
+    Ping an ipv6 address
+    """
+    print "[BOOT] Invoking ping to ipv6 network..."
+    p = subprocess.Popen(
+        ["ping6", "-c", "2", "ipv6.google.com"],
+        stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    stdout, stderr = p.communicate()
+    if p.returncode == 0:
+        print "[BOOT] IPv6 network reachable..."
+        return 1
+    print "[BOOT] [ERROR] IPv4 network unreachable..."
+    return 0
+
+class BootCommand(ConfigCommand):
+    """
+    Test network and invoke simple format and bang (Use on Linux startup)
+    """
+    command_group = 'node'
+
+    def get_parser(self, prog_name):
+        ap = super(BootCommand, self).get_parser(prog_name)
+        ap.add_argument('-m', '--message',
+                        default="Reboot",
+                        help='Message for bang')
+        return ap
+
+    @must_be_root
+    def take_action(self, args):
+        configp = self.fetch_config(args)
+        # Make sure ipv4 is working
+        instance_root = configp.get('slapos','instance_root')
+        is_ready = _ping()
+        while is_ready == 0:
+           sleep(5)
+           is_ready = _ping()
+
+        # Make sure ipv6 is working
+        is_ready = _ping6()
+        while is_ready == 0:
+            sleep(5)
+            is_ready = _ping6()
+
+        app = SlapOSApp() 
+        # Make sure slapos node format returns ok
+        is_ready = _runFormat(app)
+        while is_ready == 0:
+            print "[BOOT] [ERROR] Fail to format, try again in 15 seconds..."
+            sleep(15)
+            is_ready = _runFormat(app)
+       
+        # Make sure slapos node bang returns ok
+        is_ready = _runBang(app)
+        while is_ready == 0:
+            print "[BOOT] [ERROR] Fail to bang, try again in 15 seconds..."
+            sleep(15)
+            is_ready = _runBang(app)
+
+        _removeTimestamp(instance_root)