Github user pwendell commented on a diff in the pull request:
https://github.com/apache/spark/pull/2339#discussion_r18068045
--- Diff: ec2/spark_ec2.py ---
@@ -608,14 +597,53 @@ def setup_spark_cluster(master, opts):
print "Ganglia started at http://%s:5080/ganglia"; % master
-# Wait for a whole cluster (masters, slaves and ZooKeeper) to start up
-def wait_for_cluster(conn, wait_secs, master_nodes, slave_nodes):
- print "Waiting for instances to start up..."
- time.sleep(5)
- wait_for_instances(conn, master_nodes)
- wait_for_instances(conn, slave_nodes)
- print "Waiting %d more seconds..." % wait_secs
- time.sleep(wait_secs)
+def is_ssh_available(host, opts):
+ "Checks if SSH is available on the host."
+ try:
+ with open(os.devnull, 'w') as devnull:
+ ret = subprocess.check_call(
+ ssh_command(opts) +
+ ['-t', '-t',
+ '-o', 'ConnectTimeout=3',
+ '%s@%s' % (opts.user, host),
+ stringify_command('true')],
+ stdout=devnull,
+ stderr=devnull
+ )
+ return ret == 0
+ except subprocess.CalledProcessError as e:
+ return False
+
+
+def wait_for_cluster_state(cluster_instances, cluster_state, opts):
+ """
+ cluster_instances: a list of boto.ec2.instance.Instance
+ cluster_state: a string representing the desired state of all the
instances in the cluster
+ value can be 'ssh-ready' or a valid value from
boto.ec2.instance.InstanceState such as
+ 'running', 'terminated', etc.
+ (would be nice to replace this with a proper enum:
http://stackoverflow.com/a/1695250)
+ """
+ sys.stdout.write(
--- End diff --
nope, I just prefer using intermediate variables rather than braces with
line breaks. Somewhat of a hold over from scala. Fine either way.
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