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fence-agents.17945
0001-Adds-service-account-authentication-to-GCE...
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File 0001-Adds-service-account-authentication-to-GCE-fence-age.patch of Package fence-agents.17945
From 877be689d75892fe069154cf3bc02909f3edaf50 Mon Sep 17 00:00:00 2001 From: Tim Megela <megela@google.com> Date: Mon, 7 Dec 2020 16:06:38 -0500 Subject: [PATCH 1/1] Adds service account authentication to GCE fence agent Adds the ability to use a service acount for authentiation using --serviceaccount. Adds additional debug information. --- .travis.yml | 1 + agents/gce/fence_gce.py | 65 ++++++++++++++++++++++++++----- configure.ac | 1 + tests/data/metadata/fence_gce.xml | 5 +++ 4 files changed, 62 insertions(+), 10 deletions(-) diff --git a/.travis.yml b/.travis.yml index 03cac18a..8e006e85 100644 --- a/.travis.yml +++ b/.travis.yml @@ -24,6 +24,7 @@ before_install: - pip install pexpect - pip install boto3 - pip install google-api-python-client + - pip install oauth2client - pip install python-novaclient - pip install python-keystoneclient diff --git a/agents/gce/fence_gce.py b/agents/gce/fence_gce.py index a3d98a01..bf5f5693 100644 --- a/agents/gce/fence_gce.py +++ b/agents/gce/fence_gce.py @@ -1,5 +1,13 @@ #!@PYTHON@ -tt +# +# Requires the googleapiclient and oauth2client +# RHEL 7.x: google-api-python-client==1.6.7 python-gflags==2.0 pyasn1==0.4.8 rsa==3.4.2 +# RHEL 8.x: nothing additional needed +# SLES 12.x: python-google-api-python-client python-oauth2client python-oauth2client-gce +# SLES 15.x: python3-google-api-python-client python3-oauth2client +# + import atexit import logging import json @@ -20,7 +28,11 @@ sys.path.append("@FENCEAGENTSLIBDIR@") import googleapiclient.discovery from fencing import fail_usage, run_delay, all_opt, atexit_handler, check_input, process_input, show_docs, fence_action - +try: + from oauth2client.client import GoogleCredentials + from oauth2client.service_account import ServiceAccountCredentials +except: + pass METADATA_SERVER = 'http://metadata.google.internal/computeMetadata/v1/' METADATA_HEADERS = {'Metadata-Flavor': 'Google'} @@ -33,19 +45,22 @@ def replace_api_uri(options, http_request): uri_replacements = [] # put any env var replacements first, then baremetalsolution if in options if "FENCE_GCE_URI_REPLACEMENTS" in os.environ: + logging.debug("FENCE_GCE_URI_REPLACEMENTS environment variable exists") env_uri_replacements = os.environ["FENCE_GCE_URI_REPLACEMENTS"] try: uri_replacements_json = json.loads(env_uri_replacements) if isinstance(uri_replacements_json, list): uri_replacements = uri_replacements_json + else: + logging.warning("FENCE_GCE_URI_REPLACEMENTS exists, but is not a JSON List") except ValueError as e: logging.warning("FENCE_GCE_URI_REPLACEMENTS exists but is not valid JSON") - if options.get('--baremetalsolution') is not None: + if "--baremetalsolution" in options: uri_replacements.append( { "matchlength": 4, "match": "https://compute.googleapis.com/compute/v1/projects/(.*)/zones/(.*)/instances/(.*)/reset(.*)", - "replace": "https://baremetalsolution.googleapis.com/v1alpha1/projects/\\1/locations/\\2/instances/\\3/resetInstance\\4" + "replace": "https://baremetalsolution.googleapis.com/v1alpha1/projects/\\1/locations/\\2/instances/\\3:resetInstance\\4" }) for uri_replacement in uri_replacements: # each uri_replacement should have matchlength, match, and replace @@ -113,7 +128,14 @@ def get_nodes_list(conn, options): def get_power_status(conn, options): - logging.info("get_power_status"); + logging.debug("get_power_status") + # if this is bare metal we need to just send back the opposite of the + # requested action: if on send off, if off send on + if "--baremetalsolution" in options: + if options.get("--action") == "on": + return "off" + else: + return "on" try: instance = retry_api_execute(options, conn.instances().get( project=options["--project"], @@ -125,6 +147,10 @@ def get_power_status(conn, options): def wait_for_operation(conn, options, operation): + if 'name' not in operation: + logging.warning('Cannot wait for operation to complete, the' + ' requested operation will continue asynchronously') + return project = options["--project"] zone = options["--zone"] while True: @@ -140,6 +166,7 @@ def wait_for_operation(conn, options, operation): def set_power_status(conn, options): + logging.debug("set_power_status"); try: if options["--action"] == "off": logging.info("Issuing poweroff of %s in zone %s" % (options["--plug"], options["--zone"])) @@ -147,6 +174,7 @@ def set_power_status(conn, options): project=options["--project"], zone=options["--zone"], instance=options["--plug"])) + logging.info("Poweroff command completed, waiting for the operation to complete") wait_for_operation(conn, options, operation) logging.info("Poweroff of %s in zone %s complete" % (options["--plug"], options["--zone"])) elif options["--action"] == "on": @@ -162,12 +190,14 @@ def set_power_status(conn, options): def power_cycle(conn, options): + logging.debug("power_cycle"); try: logging.info('Issuing reset of %s in zone %s' % (options["--plug"], options["--zone"])) operation = retry_api_execute(options, conn.instances().reset( project=options["--project"], zone=options["--zone"], instance=options["--plug"])) + logging.info("Reset command completed, waiting for the operation to complete") wait_for_operation(conn, options, operation) logging.info('Reset of %s in zone %s complete' % (options["--plug"], options["--zone"])) return True @@ -176,7 +206,8 @@ def power_cycle(conn, options): return False -def get_zone(conn, options, instance): +def get_zone(conn, options): + logging.debug("get_zone"); project = options['--project'] instance = options['--plug'] fl = 'name="%s"' % instance @@ -207,6 +238,7 @@ def get_metadata(metadata_key, params=None, timeout=None): Raises: urlerror.HTTPError: raises when the GET request fails. """ + logging.debug("get_metadata"); timeout = timeout or 60 metadata_url = os.path.join(METADATA_SERVER, metadata_key) params = urlparse.urlencode(params or {}) @@ -280,13 +312,22 @@ def define_new_opts(): "default" : 5, "order" : 8 } + all_opt["serviceaccount"] = { + "getopt" : ":", + "longopt" : "serviceaccount", + "help" : "--serviceaccount=[filename] Service account json file location e.g. serviceaccount=/somedir/service_account.json", + "shortdesc" : "Service Account to use for authentication to the google cloud APIs.", + "required" : "0", + "order" : 9 + } def main(): conn = None device_opt = ["port", "no_password", "zone", "project", "stackdriver-logging", - "method", "baremetalsolution", "apitimeout", "retries", "retrysleep"] + "method", "baremetalsolution", "apitimeout", "retries", "retrysleep", + "serviceaccount"] atexit.register(atexit_handler) @@ -337,10 +378,12 @@ def main(): # Prepare cli try: - credentials = None - if tuple(googleapiclient.__version__) < tuple("1.6.0"): - import oauth2client.client - credentials = oauth2client.client.GoogleCredentials.get_application_default() + if options.get("--serviceaccount"): + credentials = ServiceAccountCredentials.from_json_keyfile_name(options.get("--serviceaccount")) + logging.debug("using credentials from service account") + else: + credentials = GoogleCredentials.get_application_default() + logging.debug("using application default credentials") conn = googleapiclient.discovery.build( 'compute', 'v1', credentials=credentials, cache_discovery=False) except Exception as err: @@ -353,6 +396,8 @@ def main(): except Exception as err: fail_usage("Failed retrieving GCE project. Please provide --project option: {}".format(str(err))) + if "--baremetalsolution" in options: + options["--zone"] = "none" if not options.get("--zone"): try: options["--zone"] = get_zone(conn, options) diff --git a/configure.ac b/configure.ac index c9016c8a..a21f99e8 100644 --- a/configure.ac +++ b/configure.ac @@ -241,6 +241,7 @@ if echo "$AGENTS_LIST" | grep -q -E "ovh|vmware_soap"; then fi if echo "$AGENTS_LIST" | grep -q gce; then AC_PYTHON_MODULE(googleapiclient) + AC_PYTHON_MODULE(oauth2client) if test "x${HAVE_PYMOD_GOOGLEAPICLIENT}" != xyes; then AGENTS_LIST=$(echo "$AGENTS_LIST" | sed -E "s#gce/fence_gce.py( |$)##") AC_MSG_WARN("Not building fence_ovh and fence_gce") diff --git a/tests/data/metadata/fence_gce.xml b/tests/data/metadata/fence_gce.xml index 78c0b0d6..33478721 100644 --- a/tests/data/metadata/fence_gce.xml +++ b/tests/data/metadata/fence_gce.xml @@ -68,6 +68,11 @@ For instructions see: https://cloud.google.com/compute/docs/tutorials/python-gui <content type="second" default="5" /> <shortdesc lang="en">Time to sleep in seconds between API retries, default is 5.</shortdesc> </parameter> + <parameter name="serviceaccount" unique="0" required="0"> + <getopt mixed="--serviceaccount=[filename]" /> + <content type="string" /> + <shortdesc lang="en">Service Account to use for authentication to the google cloud APIs.</shortdesc> + </parameter> <parameter name="quiet" unique="0" required="0"> <getopt mixed="-q, --quiet" /> <content type="boolean" /> -- 2.26.2
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