f428f60ae7
RPM uses the #! interperter to determine dependencies, the scripts should directly call /usr/bin/python instead. Change-Id: Ica64b9d4b50454f4619a1c66c9e62e1b8fd62090 Story: 2006564 Task: 37139 Signed-off-by: Saul Wold <sgw@linux.intel.com>
89 lines
3.4 KiB
Python
89 lines
3.4 KiB
Python
#!/usr/bin/python
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# Copyright (c) 2017 Wind River Systems, Inc.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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# Sample upgrade migration script. Important notes:
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# - The script should exit 0 on success and exit non-0 on fail. Note that
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# failing will result in the upgrade of controller-1 failing, so don't fail
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# unless it is a real failure.
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# - Your logic should only check the FROM_RELEASE to determine if migration is
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# required. Checking the TO_RELEASE is dangerous because we do not know
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# the exact value the TO_RELEASE will hold until we reach final compile.
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# The TO_RELEASE is here for logging reasons and in case of some unexpected
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# emergency where we may need it.
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# - The script will be passed one of the following actions:
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# start: Prepare for upgrade on release N side. Called during
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# "system upgrade-start".
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# migrate: Perform data migration on release N+1 side. Called while
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# controller-1 is performing its upgrade. At this point in the
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# upgrade of controller-1, the databases have been migrated from
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# release N to release N+1 (data migration scripts have been
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# run). Postgres is running and is using the release N+1
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# databases. The platform filesystem is mounted at /opt/platform
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# and has data populated for both release N and release N+1.
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# - We do the migration work here in the python script. This is the format we
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# use when we need to connect to the postgres database. This format makes
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# manipulating the data easier and gives more details when error handling.
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# - The migration scripts are executed in alphabetical order. Please prefix
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# your script name with a two digit number (e.g. 01-my-script-name.sh). The
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# order of migrations usually shouldn't matter, so pick an unused number
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# near the middle of the range.
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import sys
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import psycopg2
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from controllerconfig.common import log
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from psycopg2.extras import RealDictCursor
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LOG = log.get_logger(__name__)
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def main():
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action = None
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from_release = None
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to_release = None # noqa
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arg = 1
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while arg < len(sys.argv):
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if arg == 1:
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from_release = sys.argv[arg]
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elif arg == 2:
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to_release = sys.argv[arg] # noqa
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elif arg == 3:
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action = sys.argv[arg]
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else:
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print("Invalid option %s." % sys.argv[arg])
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return 1
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arg += 1
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log.configure()
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if from_release == "17.06" and action == "migrate":
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try:
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LOG.info("performing sample migration from release %s to %s with "
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"action: %s" % (from_release, to_release, action))
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do_migration_work()
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except Exception as ex:
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LOG.exception(ex)
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print(ex)
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return 1
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# Rename this function to something relevant
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def do_migration_work():
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""" This is a sample upgrade action."""
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conn = psycopg2.connect("dbname='sysinv' user='postgres'")
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with conn:
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with conn.cursor(cursor_factory=RealDictCursor) as cur:
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cur.execute("select * from i_system;")
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row = cur.fetchone()
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if row is None:
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LOG.exception("Failed to fetch i_system data")
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raise
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LOG.info("Got system version: %s during sample migration script"
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% row.get('software_version'))
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if __name__ == "__main__":
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sys.exit(main())
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