mirror of
https://github.com/krkn-chaos/krkn.git
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93 lines
3.4 KiB
Python
93 lines
3.4 KiB
Python
import time
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import random
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import logging
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import paramiko
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import kraken.kubernetes.client as kubecli
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import kraken.invoke.command as runcommand
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node_general = False
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# Pick a random node with specified label selector
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def get_node(node_name, label_selector, instance_kill_count):
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if node_name in kubecli.list_killable_nodes():
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return [node_name]
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elif node_name:
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logging.info("Node with provided node_name does not exist or the node might " "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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if instance_kill_count == number_of_nodes:
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return nodes
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nodes_to_return = []
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for i in range(instance_kill_count):
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node_to_add = nodes[random.randint(0, len(nodes) - 1)]
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nodes_to_return.append(node_to_add)
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nodes.remove(node_to_add)
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return nodes_to_return
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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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for _ in range(timeout):
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if kubecli.get_node_status(node) == "Ready":
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break
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time.sleep(3)
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if kubecli.get_node_status(node) != "Ready":
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raise Exception("Node condition status isn't Ready")
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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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try:
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node_status = kubecli.get_node_status(node, timeout)
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if node_status is None or node_status == "Unknown":
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break
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except Exception:
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logging.error("Encountered error while getting node status, waiting 3 seconds and retrying")
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time.sleep(3)
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node_status = kubecli.get_node_status(node, timeout)
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logging.info("node status " + str(node_status))
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if node_status is not None and node_status != "Unknown":
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raise Exception("Node condition status isn't Unknown after %s seconds" % str(timeout))
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# Get the ip of the cluster node
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def get_node_ip(node):
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return runcommand.invoke(
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"kubectl get node %s -o " "jsonpath='{.status.addresses[?(@.type==\"InternalIP\")].address}'" % (node)
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)
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def check_service_status(node, service, ssh_private_key, timeout):
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ssh = paramiko.SSHClient()
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ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
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i = 0
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sleeper = 1
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while i <= timeout:
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try:
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time.sleep(sleeper)
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i += sleeper
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logging.info("Trying to ssh to instance: %s" % (node))
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connection = ssh.connect(
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node, username="root", key_filename=ssh_private_key, timeout=800, banner_timeout=400
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)
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if connection is None:
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break
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except Exception:
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pass
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for service_name in service:
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logging.info("Checking status of Service: %s" % (service_name))
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stdin, stdout, stderr = ssh.exec_command(
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"systemctl status %s | grep '^ Active' " "| awk '{print $2}'" % (service_name)
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)
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service_status = stdout.readlines()[0]
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logging.info("Status of service %s is %s \n" % (service_name, service_status.strip()))
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if service_status.strip() != "active":
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logging.error("Service %s is in %s state" % (service_name, service_status.strip()))
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ssh.close()
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