mirror of
https://github.com/krkn-chaos/krkn.git
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31f06b861a
This commit: - Adds a node scenario to stop and start an instance - Adds a node scenario to terminate an instance - Adds a node scenario to reboot an instance - Adds a node scenario to stop the kubelet - Adds a node scenario to crash the node
38 lines
1.3 KiB
Python
38 lines
1.3 KiB
Python
import time
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import random
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import logging
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import kraken.kubernetes.client as kubecli
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import kraken.invoke.command as runcommand
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# Pick a random node with specified label selector
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def get_node(node_name, label_selector):
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if node_name in kubecli.list_killable_nodes():
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return node_name
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else:
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logging.info("Node with provided node_name does not exist or the node might "
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"be in NotReady state.")
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nodes = kubecli.list_killable_nodes(label_selector)
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if not nodes:
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raise Exception("Ready nodes with the provided label selector do not exist")
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logging.info("Ready nodes with the label selector %s: %s" % (label_selector, nodes))
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number_of_nodes = len(nodes)
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node = nodes[random.randint(0, number_of_nodes - 1)]
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return node
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# Wait till node status becomes Ready
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def wait_for_ready_status(node, timeout):
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runcommand.invoke("kubectl wait --for=condition=Ready "
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"node/" + node + " --timeout=" + str(timeout) + "s")
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# Wait till node status becomes NotReady
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def wait_for_unknown_status(node, timeout):
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for _ in range(timeout):
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if kubecli.get_node_status(node) == "Unknown":
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break
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time.sleep(1)
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if kubecli.get_node_status(node) != "Unknown":
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raise Exception("Node condition status isn't Unknown")
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