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Add scale thresholds to split etcd and k8s-masters

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Also adds calico-rr group if there are standalone etcd nodes.
Now if there are 50 or more nodes, 3 etcd nodes will be standalone.
If there are 200 or more nodes, 2 kube-masters will be standalone.
If thresholds are exceeded, kube-node group cannot add nodes that
belong to etcd or kube-master groups (according to above statements).
This commit is contained in:
Matthew Mosesohn
2017-01-11 18:15:04 +03:00
parent 5420fa942e
commit f742fc3dd1
6 changed files with 96 additions and 62 deletions
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28
contrib/inventory_builder/tests/test_inventory.py
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@@ -210,3 +210,31 @@ class TestInventory(unittest.TestCase):
self.inv.set_etcd([host])
self.assertTrue(host in self.inv.config[group])
def test_scale_scenario_one(self):
num_nodes = 50
hosts = OrderedDict()
for hostid in range(1, num_nodes+1):
hosts["node" + str(hostid)] = ""
self.inv.set_all(hosts)
self.inv.set_etcd(hosts.keys()[0:3])
self.inv.set_kube_master(hosts.keys()[0:2])
self.inv.set_kube_node(hosts.keys())
for h in range(3):
self.assertFalse(hosts.keys()[h] in self.inv.config['kube-node'])
def test_scale_scenario_two(self):
num_nodes = 500
hosts = OrderedDict()
for hostid in range(1, num_nodes+1):
hosts["node" + str(hostid)] = ""
self.inv.set_all(hosts)
self.inv.set_etcd(hosts.keys()[0:3])
self.inv.set_kube_master(hosts.keys()[3:5])
self.inv.set_kube_node(hosts.keys())
for h in range(5):
self.assertFalse(hosts.keys()[h] in self.inv.config['kube-node'])