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import subprocess, os, json, re
from clusterman.config import CONF
def ssh_exec(host,command,use_key=True):
user="root" if len(CONF["ssh"]["user"]) <= 0 else CONF["ssh"]["user"]
key_path=CONF["ssh"]["key_path"]
if use_key and len(key_path) > 0:
output=subprocess.check_output(["ssh","-o", "StrictHostKeyChecking=no", "-o", "PasswordAuthentication=no", "-i", CONF["ssh"]["key_path"],"{}@{}".format(user,host), command])
return output.decode("utf-8")
elif use_key:
print("Configuration variable \"key_path\" is not set")
sys.exit(1)
else:
output=subprocess.check_output(["ssh","-o", "StrictHostKeyChecking=no", "{}@{}".format(user,host), command])
return output.decode("utf-8")
def ping_test(host, timeout=None):
t=CONF["timeout"]
if timeout is not None:
t=timeout
try:
subprocess.run(["ping", "-c", "1", "-W", str(t), host],capture_output=True,check=True)
return 0
except:
return 1
def get_node_list():
nodes_path=CONF.NODE_FILE
if os.path.exists(nodes_path):
with open(nodes_path) as f:
nodes=json.load(f)
return nodes.keys()
return list()
def get_node_in_group(group):
nodes=get_node_list()
# Search
ingroup=list()
if len(nodes) > 0 and group in CONF["cluster"]["groups"]:
patterns=[re.compile(pattern) for pattern in CONF["cluster"]["groups"][group]]
for node in nodes:
for pattern in patterns:
if pattern.match(node):
ingroup.append(node)
break;
return ingroup
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