97 lines
3.1 KiB
Python
97 lines
3.1 KiB
Python
#!/usr/bin/env python
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# Copyright 2015 Paul Bourke
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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This script is a simple wrapper used to create and rebalance Swift ring files.
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"""
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import argparse
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import subprocess # nosec
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import sys
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def setup_args():
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parser = argparse.ArgumentParser()
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parser.add_argument("-f", "--ring-file",
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required=True,
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help="Path to ring file")
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parser.add_argument("-p", "--part-power",
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required=True,
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help="Part power")
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parser.add_argument("-r", "--num-replicas",
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required=True,
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help="Number of replicas")
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parser.add_argument("-m", "--min-part-hours",
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required=True,
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help="Min part hours")
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parser.add_argument("-H", "--hosts",
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required=True,
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help="Hosts in the ring, comma delimited")
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parser.add_argument("-w", "--weights",
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required=True,
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help="Weight of each host, comma delimited")
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parser.add_argument("-d", "--devices",
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required=True,
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help="Device on each host, comma delimited")
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parser.add_argument("-z", "--zones",
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required=True,
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help="Zone of each host, comma delimited")
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return parser.parse_args()
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def run_cmd(cmd):
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print(' '.join(cmd))
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# NOTE(sdake): [0] we expect Operators to run this command and for their
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# environment to be properly secured. Since this is not a network
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# facing tool, there is no risk of untrusted input.
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subprocess.call(cmd) # nosec [0]
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def run(args):
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hosts = args.hosts.split(',')
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weights = args.weights.split(',')
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zones = args.zones.split(',')
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devices = args.devices.split(',')
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if not (len(hosts) == len(weights) == len(zones) == len(devices)):
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print('Error: an equal amount of hosts, devices, weights, '
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'and zones are required')
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sys.exit(1)
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run_cmd(['swift-ring-builder',
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args.ring_file,
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'create',
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args.part_power,
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args.num_replicas,
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args.min_part_hours])
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for i in range(len(hosts)):
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run_cmd(['swift-ring-builder',
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args.ring_file,
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'add',
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'z{}-{}/{}'.format(zones[i], hosts[i], devices[i]),
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weights[i]])
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run_cmd(['swift-ring-builder', args.ring_file, 'rebalance'])
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def main():
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args = setup_args()
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run(args)
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if __name__ == "__main__":
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main()
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