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SPARK-3332 - Tags shouldn't be the main strategy for machine membership on clusters #2223

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SPARK-3332 - Tags shouldn't be the main strategy for machine membership on clusters #2223

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11 changes: 8 additions & 3 deletions ec2/spark_ec2.py
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Original file line number Diff line number Diff line change
Expand Up @@ -508,10 +508,16 @@ def get_existing_cluster(conn, opts, cluster_name, die_on_error=True):
for res in reservations:
active = [i for i in res.instances if is_active(i)]
for inst in active:
group_names = [g.name for g in inst.groups]
name = inst.tags.get(u'Name', "")
if name.startswith(cluster_name + "-master"):
master_name = cluster_name + "-master"
slave_name = cluster_name + "-slave"
# Check by tag name is required when --security-group-prefix flag is used
# but it's not failsafe, so also check by group name
# which is a more solid strategy in the general case
if name.startswith(master_name) or master_name in group_names:
master_nodes.append(inst)
elif name.startswith(cluster_name + "-slave"):
elif name.startswith(slave_name) or slave_name + 's' in group_names:
slave_nodes.append(inst)
if any((master_nodes, slave_nodes)):
print ("Found %d master(s), %d slaves" % (len(master_nodes), len(slave_nodes)))
Expand Down Expand Up @@ -597,7 +603,6 @@ def get_num_disks(instance_type):
"m1.medium": 1,
"m1.large": 2,
"m1.xlarge": 4,
"t1.micro": 1,
"c1.medium": 1,
"c1.xlarge": 4,
"m2.xlarge": 1,
Expand Down