Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/2339#discussion_r17377246
--- Diff: ec2/spark_ec2.py ---
@@ -618,6 +620,57 @@ def wait_for_cluster(conn, wait_secs, master_nodes,
slave_nodes):
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
+ )
+ if ret == 0:
+ return True
+ else:
+ return False
--- End diff --
return ret == 0
---
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