Added big_riak example, it allow to create riak cluster with given size

Could be used for perf testing.

examples/riak/riaks_big.py

@@ -0,0 +1,107 @@
+#!/usr/bin/env python
+
+# this allows you to create riak cluster as big as you want
+
+import click
+import sys
+
+from solar.core import resource
+from solar.core import signals
+from solar.core import validation
+from solar.core.resource import virtual_resource as vr
+from solar import errors
+
+from solar.interfaces.db import get_db
+
+from solar.events.controls import React, Dep
+from solar.events.api import add_event
+
+
+db = get_db()
+
+
+NODES = 3
+
+def setup_riak(nodes_num=None):
+
+    if nodes_num is None:
+        nodes_num = NODES
+    db.clear()
+
+    resources = vr.create('nodes', 'templates/nodes.yaml', {'count': nodes_num})
+    nodes = [x for x in resources if x.name.startswith('node')]
+
+    riak_services = []
+    ips = '10.0.0.%d'
+    for i in xrange(nodes_num):
+        num = i + 1
+        r = vr.create('riak_service%d' % num,
+                      'resources/riak_node',
+                      {'riak_self_name': 'riak%d' % num,
+                       'riak_hostname': 'riak_server%d.solar' % num,
+                       'riak_name': 'riak%d@riak_server%d.solar' % (num, num)})[0]
+        riak_services.append(r)
+
+    for i, riak in enumerate(riak_services):
+        nodes[i].connect(riak)
+
+    for i, riak in enumerate(riak_services[1:]):
+        riak_services[0].connect(riak, {'riak_name': 'join_to'})
+
+    hosts_services = []
+    for i, riak in enumerate(riak_services):
+        num = i + 1
+        hosts_file = vr.create('hosts_file%d' % num,
+                               'resources/hosts_file', {})[0]
+        hosts_services.append(hosts_file)
+        nodes[i].connect(hosts_file)
+
+    for riak in riak_services:
+        for hosts_file in hosts_services:
+            riak.connect_with_events(hosts_file,
+                {'riak_hostname': 'hosts:name',
+                 'ip': 'hosts:ip'})
+
+    res_errors = resource.validate_resources()
+    for r, error in res_errors:
+        click.echo('ERROR: %s: %s' % (r.name, error))
+    has_errors = False
+
+    if has_errors:
+        click.echo("ERRORS")
+        sys.exit(1)
+
+    events = []
+    for x in xrange(nodes_num):
+        i = x + 1
+        events.append(Dep('hosts_file%d' % i, 'run', 'success', 'riak_service%d' % i, 'run'))
+        if i >= 2:
+            events.append(React('riak_service%d' % i, 'run', 'success', 'riak_service%d' % i, 'join'))
+        events.append(React('riak_service%d' % i, 'join', 'success', 'riak_service1', 'commit'))
+
+    for event in events:
+        add_event(event)
+
+    click.echo('Use solar changes process & orch')
+    sys.exit(0)
+
+
+@click.group()
+def main():
+    pass
+
+
+@click.command()
+@click.argument('nodes_count', type=int)
+def deploy(nodes_count):
+    click.secho("With big nodes_count, this example is DB heavy, it creates NxN connections, continue ? [y/N] ", fg='red', nl=False)
+    c= click.getchar()
+    if c in ('y', 'Y'):
+        setup_riak(nodes_count)
+    else:
+        click.echo("Aborted")
+
+
+if __name__ == '__main__':
+    main.add_command(deploy)
+    main()