adding delay_after to wait_for ssh

playbooks/library/wait_for

+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# (c) 2012, Jeroen Hoekx <jeroen@hoekx.be>
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+import socket
+import datetime
+import time
+import sys
+
+DOCUMENTATION = '''
+---
+module: wait_for
+short_description: Waits for a given port to become accessible on a server.
+description:
+     - This is useful for when services are not immediately available after
+       their init scripts return - which is true of certain Java application
+       servers. It is also useful when starting guests with the M(virt) module and
+       needing to pause until they are ready.
+version_added: "0.7"
+options:
+  host:
+    description:
+      - hostname or IP address to wait for
+    required: false
+    default: "127.0.0.1"
+    aliases: []
+  timeout:
+    description:
+      - maximum number of seconds to wait for
+    required: false
+    default: 300
+  delay:
+    description:
+      - number of seconds to wait before starting to poll
+    required: false
+    default: 0
+  port:
+    description:
+      - port number to poll
+    required: true
+  state:
+    description:
+      - either C(started), or C(stopped) depending on whether the module should 
+        poll for the port being open or closed.
+    choices: [ "started", "stopped" ]
+    default: "started"
+notes: []
+requirements: []
+author: Jeroen Hoekx
+'''
+
+EXAMPLES = '''
+# wait 300 seconds for port 8000 to become open on the host, don't start checking for 10 seconds
+- wait_for: port=8000 delay=10"
+'''
+
+def main():
+
+    module = AnsibleModule(
+        argument_spec = dict(
+            host=dict(default='127.0.0.1'),
+            timeout=dict(default=300),
+            connect_timeout=dict(default=5),
+            delay=dict(default=0),
+            port=dict(required=True),
+            state=dict(default='started', choices=['started', 'stopped']),
+            delay_after=dict(default=None),
+        ),
+    )
+
+    params = module.params
+
+    host = params['host']
+    timeout = int(params['timeout'])
+    connect_timeout = int(params['connect_timeout'])
+    delay = int(params['delay'])
+    port = int(params['port'])
+    state = params['state']
+
+    start = datetime.datetime.now()
+
+    if delay:
+        time.sleep(delay)
+
+    if state == 'stopped':
+        ### first wait for the host to go down
+        end = start + datetime.timedelta(seconds=timeout)
+
+        while datetime.datetime.now() < end:
+            s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+            s.settimeout(connect_timeout)
+            try:
+                s.connect( (host, port) )
+                s.shutdown(socket.SHUT_RDWR)
+                s.close()
+                time.sleep(1)
+            except:
+                break
+        else:
+            elapsed = datetime.datetime.now() - start
+            module.fail_json(msg="Timeout when waiting for %s:%s to stop." % (host, port), elapsed=elapsed.seconds)
+
+    elif state == 'started':
+        ### wait for the host to come up
+        end = start + datetime.timedelta(seconds=timeout)
+
+        while datetime.datetime.now() < end:
+            s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+            s.settimeout(connect_timeout)
+            try:
+                s.connect( (host, port) )
+                s.shutdown(socket.SHUT_RDWR)
+                s.close()
+                break
+            except:
+                time.sleep(1)
+                pass
+        else:
+            elapsed = datetime.datetime.now() - start
+            module.fail_json(msg="Timeout when waiting for %s:%s" % (host, port), elapsed=elapsed.seconds)
+
+    if delay_after:
+        time.sleep(delay_after)
+
+    elapsed = datetime.datetime.now() - start
+    module.exit_json(state=state, port=port, elapsed=elapsed.seconds)
+
+# this is magic, see lib/ansible/module_common.py
+#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
+main()

playbooks/roles/launch_ec2/tasks/main.yml

@@ -15,9 +15,19 @@
   register: ec2
 
 - name: launch_instance | Add new instance to host group
-  local_action: add_host hostname=${item.public_ip} groupname=launched 
-  with_items: ${ec2.instances} 
+  local_action: >
+    add_host 
+      hostname={{ item.public_ip }} 
+      groupname=launched 
+  with_items: {{ ec2.instances }}
 
 - name: launch_instance | Wait for SSH to come up
-  local_action: wait_for host=${item.public_dns_name} port=22 delay=60 timeout=320 state=started
-  with_items: ${ec2.instances}
+  local_action: >
+    wait_for 
+      host={{ item.public_dns_name }}
+      state=started
+      port=22 
+      delay=60 
+      timeout=320
+      delay_after=5
+  with_items: {{ ec2.instances }}