1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
#!@PYTHON@ -tt
import sys
import logging
import atexit
sys.path.append("@FENCEAGENTSLIBDIR@")
from fencing import *
from fencing import fail, fail_usage, run_delay, EC_STATUS, EC_FETCH_VM_UUID
try:
from kubernetes.client.exceptions import ApiException
except ImportError:
logging.error("Couldn\'t import kubernetes.client.exceptions.ApiException - not found or not accessible")
def _get_namespace(options):
from kubernetes import config
ns = options.get("--namespace")
if ns is None:
ns = config.kube_config.list_kube_config_contexts()[1]['context']['namespace']
return ns
def get_nodes_list(conn, options):
logging.debug("Starting list/monitor operation")
result = {}
try:
apiversion = options.get("--apiversion")
namespace = _get_namespace(options)
include_uninitialized = True
vm_api = conn.resources.get(api_version=apiversion, kind='VirtualMachine')
vm_list = vm_api.get(namespace=namespace)
for vm in vm_list.items:
result[vm.metadata.name] = ("", None)
except Exception as e:
logging.error("Exception when calling VirtualMachine list: %s", e)
return result
def get_power_status(conn, options):
logging.debug("Starting get status operation")
try:
apiversion = options.get("--apiversion")
namespace = _get_namespace(options)
name = options.get("--plug")
vmi_api = conn.resources.get(api_version=apiversion,
kind='VirtualMachineInstance')
vmi = vmi_api.get(name=name, namespace=namespace)
return translate_status(vmi.status.phase)
except ApiException as e:
if e.status == 404:
try:
vm_api = conn.resources.get(api_version=apiversion, kind='VirtualMachine')
vm = vm_api.get(name=name, namespace=namespace)
except ApiException as e:
logging.error("VM %s doesn't exist", name)
fail(EC_FETCH_VM_UUID)
return "off"
logging.error("Failed to get power status, with API Exception: %s", e)
fail(EC_STATUS)
except Exception as e:
logging.error("Failed to get power status, with Exception: %s", e)
fail(EC_STATUS)
def translate_status(instance_status):
if instance_status == "Running":
return "on"
return "unknown"
def set_power_status(conn, options):
logging.debug("Starting set status operation")
try:
apiversion= options.get("--apiversion")
namespace = _get_namespace(options)
name = options.get("--plug")
action = 'start' if options["--action"] == "on" else 'stop'
virtctl_vm_action(conn, action, namespace, name, apiversion)
except Exception as e:
logging.error("Failed to set power status, with Exception: %s", e)
fail(EC_STATUS)
def define_new_opts():
all_opt["namespace"] = {
"getopt" : ":",
"longopt" : "namespace",
"help" : "--namespace=[namespace] Namespace of the KubeVirt machine",
"shortdesc" : "Namespace of the KubeVirt machine.",
"required" : "0",
"order" : 2
}
all_opt["kubeconfig"] = {
"getopt" : ":",
"longopt" : "kubeconfig",
"help" : "--kubeconfig=[kubeconfig] Kubeconfig file path",
"shortdesc": "Kubeconfig file path",
"required": "0",
"order": 4
}
all_opt["apiversion"] = {
"getopt" : ":",
"longopt" : "apiversion",
"help" : "--apiversion=[apiversion] Version of the KubeVirt API",
"shortdesc" : "Version of the KubeVirt API.",
"required" : "0",
"default" : "kubevirt.io/v1",
"order" : 5
}
def virtctl_vm_action(conn, action, namespace, name, apiversion):
path = '/apis/subresources.{api_version}/namespaces/{namespace}/virtualmachines/{name}/{action}'
path = path.format(api_version=apiversion, namespace=namespace, name=name, action=action)
return conn.request('put', path, header_params={'accept': '*/*'})
# Main agent method
def main():
conn = None
device_opt = ["port", "namespace", "kubeconfig", "ssl_insecure", "no_password", "apiversion"]
atexit.register(atexit_handler)
define_new_opts()
all_opt["power_timeout"]["default"] = "40"
options = check_input(device_opt, process_input(device_opt))
docs = {}
docs["shortdesc"] = "Fence agent for KubeVirt"
docs["longdesc"] = "fence_kubevirt is an I/O Fencing agent for KubeVirt."
docs["vendorurl"] = "https://kubevirt.io/"
show_docs(options, docs)
run_delay(options)
# Disable insecure-certificate-warning message
if "--ssl-insecure" in options:
import urllib3
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
try:
from kubernetes import config
from openshift.dynamic import DynamicClient
kubeconfig = options.get('--kubeconfig')
k8s_client = config.new_client_from_config(config_file=kubeconfig)
conn = DynamicClient(k8s_client)
except ImportError:
logging.error("Couldn\'t import kubernetes.config or "
"openshift.dynamic.DynamicClient - not found or not accessible")
# Operate the fencing device
result = fence_action(conn, options, set_power_status, get_power_status, get_nodes_list)
sys.exit(result)
if __name__ == "__main__":
main()
|
