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dynamic_inventory_cm_py3
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
'''
Created by Gabor Roczei <[email protected]>
=============================================================================
Ansible Dynamic Inventory Script for Cloudera Manager
=============================================================================
The available Cloudera Manager clusters (Ansible groups, for example: Cluster_1, Balaton)
can be listed with the following command:
dynamic_inventory_cm --list
Example Ansible ad-hoc commands:
ansible all -u $USER --become-user $USER -i dynamic_inventory_cm --list-hosts
ansible Balaton --ask-pass -u $USER --become-user $USER -i dynamic_inventory_cm -o -m command -a "time id -Gn $USER"
ansible Cluster_1 --ask-pass -u $USER --become-user $USER -i dynamic_inventory_cm -o -m command -a "date"
ansible --ask-pass -u $USER --become-user $USER -i dynamic_inventory_cm -o -m ping all
'''
import os
import time
import sys
import argparse
import json
import urllib.request, urllib.error, urllib.parse
import ssl
import base64
import getpass
import http.cookiejar
from urllib.parse import urlparse
# Cache time (seconds)
default_cache_time_sec = 30 * 24 * 60 * 60
# Disabling SSL CA check
default_disable_ca_check = False
# Cloudera Manager API timeout (seconds)
default_timeout_sec = 60
# Debug mode
default_debug = False
def save_cookie(cookiejar, filename):
lwp_cookiejar = http.cookiejar.LWPCookieJar()
for cookie in cookiejar:
parameters = dict(list(vars(cookie).items()))
parameters["rest"] = parameters["_rest"]
del parameters["_rest"]
cookie = http.cookiejar.Cookie(**parameters)
lwp_cookiejar.set_cookie(cookie)
lwp_cookiejar.save(filename, ignore_discard = True)
os.chmod(filename, 0o600)
def load_cookie(filename):
lwp_cookiejar = http.cookiejar.LWPCookieJar()
lwp_cookiejar.load(filename, ignore_discard = True)
return lwp_cookiejar
class ClouderaManagerInventory:
def __init__(self):
self.inventory = {"_meta" : { "hostvars": {} }}
self.cookie_path = os.environ["HOME"] + os.sep + ".cm" + os.sep + ".cm_cookie"
self.json_path = os.environ["HOME"] + os.sep + ".cm" + os.sep + ".cm_inventory.json"
self.api_version = "v30"
cache_time_sec = os.getenv("CM_CACHE_TIME_SEC")
disable_ca_check = os.getenv("CM_DISABLE_CA_CHECK")
timeout_sec = os.getenv("CM_TIMEOUT_SEC")
debug = os.getenv("CM_DEBUG")
if not os.path.exists(os.environ["HOME"] + os.sep + ".cm"):
os.makedirs(os.environ["HOME"] + os.sep + ".cm")
os.chmod(os.environ["HOME"] + os.sep + ".cm", 0o700)
if cache_time_sec == None:
self.cache_time_sec = default_cache_time_sec
else:
try:
self.cache_time_sec = int(cache_time_sec)
except Exception as e:
if "invalid literal for int" in str(e):
sys.stderr.write("The value is incorrect in CM_CACHE_TIME_SEC: " + cache_time_sec + ". It is not a valid integer number.\n")
sys.exit(-1)
else:
sys.stderr.write(str(e))
sys.exit(-1)
if timeout_sec == None:
self.timeout_sec = default_timeout_sec
else:
try:
self.timeout_sec = int(timeout_sec)
except Exception as e:
if "invalid literal for int" in str(e):
sys.stderr.write("The value is incorrect in CM_TIMEOUT_SEC: " + timeout_sec + ". It is not a valid integer number.\n")
sys.exit(-1)
else:
sys.stderr.write(str(e))
sys.exit(-1)
if disable_ca_check == None:
self.disable_ca_check = default_disable_ca_check
elif disable_ca_check.lower() == "true":
self.disable_ca_check = True
elif disable_ca_check.lower() == "false":
self.disable_ca_check = False
else:
sys.stderr.write("Unknown value in CM_DISABLE_CA_CHECK: " + disable_ca_check + ". Valid values can only be True or False\n")
sys.exit(-1)
if debug == None:
self.debug = default_debug
elif debug.lower() == "true":
self.debug = True
elif debug.lower() == "false":
self.debug = False
else:
sys.stderr.write("Unknown value in CM_DEBUG: " + debug + ". Valid values can only be True or False\n")
sys.exit(-1)
self.read_args()
def cm_connection(self, url, username, password, cookie):
try:
if self.disable_ca_check:
context = ssl._create_unverified_context()
else:
context = None
cookie_handler = urllib.request.HTTPCookieProcessor(cookie)
password_manager = urllib.request.HTTPPasswordMgrWithDefaultRealm()
password_manager.add_password(realm = "Cloudera Manager",
uri = url + "/api/v1",
user = username,
passwd = password)
auth_handler = urllib.request.HTTPBasicAuthHandler(password_manager)
if self.debug:
debuglevel = 1
else:
debuglevel = 0
http_handler = urllib.request.HTTPHandler(debuglevel = debuglevel)
https_handler = urllib.request.HTTPSHandler(context = context, debuglevel = debuglevel)
error_handler = urllib.request.HTTPErrorProcessor()
opener = urllib.request.build_opener(cookie_handler, auth_handler, http_handler, https_handler, error_handler)
urllib.request.install_opener(opener)
userpass = username + ":" + password
auth_string = base64.b64encode(userpass.encode()).decode()
headers = {"Authorization" : "Basic %s" % auth_string}
version_url = url + "/api/version"
version_request = urllib.request.Request(version_url, None, headers)
version_response = urllib.request.urlopen(version_request, timeout = self.timeout_sec).read()
#if version_response:
# self.api_version = version_response.decode()
hosts_url = url + "/api/" + self.api_version + "/hosts"
hosts_response = opener.open(hosts_url, timeout = self.timeout_sec).read()
host_names = {}
if hosts_response:
hosts = json.loads(hosts_response.decode())
for host in hosts["items"]:
hostid = host.get("hostId")
host_names[hostid] = host.get("hostname")
clusters_url = url + "/api/" + self.api_version + "/clusters"
clusters_response = opener.open(clusters_url, timeout = self.timeout_sec).read()
if clusters_response:
clusters = json.loads(clusters_response.decode())
for cluster in clusters["items"]:
cluster_name = cluster.get("displayName")
cluster_name_updated = cluster_name.replace(" ", "_")
cluster_name_updated = cluster_name.replace("-", "_")
hosts = {"hosts" : []}
i = 2
while cluster_name_updated in self.inventory:
if cluster_name_updated + "_" + str(i) in self.inventory:
i = i + 1
else:
cluster_name_updated = cluster_name_updated + "_" + str(i)
break
self.inventory[cluster_name_updated] = hosts
clusters_hosts_url = url + "/api/" + self.api_version + "/clusters/" + cluster_name + "/hosts"
clusters_hosts_url = urllib.parse.quote(clusters_hosts_url,":/")
clusters_hosts_response = opener.open(clusters_hosts_url, timeout = self.timeout_sec).read()
if clusters_hosts_response:
hostids = json.loads(clusters_hosts_response.decode())
for hostid in hostids["items"]:
hostid = hostid.get("hostId")
host = host_names[hostid]
self.inventory[cluster_name_updated]["hosts"].append(host)
parsed_url = urlparse(url)
save_cookie(cookie, self.cookie_path + "." + str(parsed_url.hostname))
except Exception as e:
if "Bad credentials" in str(e):
if os.path.exists(self.cookie_path):
os.remove(self.cookie_path)
return 1
elif "CERTIFICATE_VERIFY_FAILED" in str(e):
sys.stderr.write("URL: " + url + "\n")
sys.stderr.write(str(e) + "\n")
sys.stderr.write("\nThe root CA check for Cloudera Manager server(s) can be disabled or enabled with this:\n\n")
sys.stderr.write("export CM_DISABLE_CA_CHECK=True\n\n")
sys.exit(-1)
else:
sys.stderr.write("URL: " + url + "\n")
sys.stderr.write(str(e) + "\n")
sys.exit(-1)
def read_args(self):
parser = argparse.ArgumentParser()
parser.add_argument("--list", help = "List the clusters and the hosts", action = "store_true")
parser.add_argument("--host", help = "", action = "store")
parser.add_argument("--refresh-cache", help = "Refresh the (Cloudera Manager) inventory cache" , action = "store_true")
self.args = parser.parse_args()
if self.args.refresh_cache:
self.option_refresh_cache()
if self.args.list:
self.option_list()
if self.args.host:
self.option_host()
def option_list(self):
if os.path.exists(self.json_path) and (time.time() - os.path.getmtime(self.json_path) < self.cache_time_sec):
json_data = open(self.json_path, "r")
self.inventory = json.load(json_data)
print(json.dumps(self.inventory, sort_keys = True, indent = 4, separators=(",", ": ")))
sys.exit(0)
self.option_refresh_cache()
print(json.dumps(self.inventory, sort_keys = True, indent = 4, separators=(",", ": ")))
def option_refresh_cache(self):
cm_urls = os.getenv("CM_URL")
username = os.getenv("CM_USERNAME")
password = ""
if cm_urls == None:
sys.stderr.write("CM_URL shell variable has not been set, configure the Cloudera Manager's URL. Examples:\n\n")
sys.stderr.write("export CM_URL=https://host-10-17-101-73.coe.example.com:7183\n")
sys.stderr.write("export CM_URL=https://host-10-17-101-73.coe.example.com:7183,http://nightly512-1.vpc.example.com:7180\n\n")
sys.exit(-1)
if username == None:
sys.stderr.write("CM_USERNAME shell variable has not been set, configure the Cloudera Manager's username. Example:\n\n")
sys.stderr.write("export CM_USERNAME=username\n\n")
sys.exit(-1)
urls = cm_urls.split(",")
for url in urls:
url = url.strip()
parsed_url = urlparse(url)
cookie_path = self.cookie_path + "." + str(parsed_url.hostname)
if os.path.isfile(cookie_path):
cookie = load_cookie(cookie_path)
result = self.cm_connection(url, username, password, cookie)
if result != 1:
continue
cookie = http.cookiejar.LWPCookieJar()
while True:
prompt_message = "Cloudera Manager's URL: " + url + "\nCloudera Manager's password: "
password = getpass.getpass(prompt_message)
result = self.cm_connection(url, username, password, cookie)
if result != 1:
break
user_input = input("Cloudera Manager's username (default: %s): " % username)
if user_input:
username = user_input.strip()
with open(self.json_path, "w") as outfile:
json.dump(self.inventory, outfile)
def option_host(self):
print(json.dumps(self.inventory, sort_keys = True, indent = 4, separators=(",", ": ")))
if __name__ == "__main__":
ClouderaManagerInventory()