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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| # This file is part of VoltDB. | ||
|
|
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| # Copyright (C) 2008-2015 VoltDB Inc. | ||
| # | ||
| # This file contains original code and/or modifications of original code. | ||
| # Any modifications made by VoltDB Inc. are licensed under the following | ||
| # terms and conditions: | ||
| # | ||
| # Permission is hereby granted, free of charge, to any person obtaining | ||
| # a copy of this software and associated documentation files (the | ||
| # "Software"), to deal in the Software without restriction, including | ||
| # without limitation the rights to use, copy, modify, merge, publish, | ||
| # distribute, sublicense, and/or sell copies of the Software, and to | ||
| # permit persons to whom the Software is furnished to do so, subject to | ||
| # the following conditions: | ||
| # | ||
| # The above copyright notice and this permission notice shall be | ||
| # included in all copies or substantial portions of the Software. | ||
|
|
||
| # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | ||
| # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||
| # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | ||
| # IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR | ||
| # OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | ||
| # ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | ||
| # OTHER DEALINGS IN THE SOFTWARE. | ||
|
|
||
| # Stop a node. Written to easily support multiple, but configured for | ||
| # a single host for now. | ||
|
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|
|
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| class Host(dict): | ||
|
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| def __init__(self, id, abort_func): | ||
| self.id = id | ||
| self.abort_func = abort_func | ||
|
|
||
| # Provide pseudo-attributes for dictionary items with error checking | ||
| def __getattr__(self, name): | ||
| try: | ||
| return self[name] | ||
| except IndexError: | ||
| self.abort_func('Attribute "%s" not present for host.' % name) | ||
|
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|
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| class Hosts(object): | ||
|
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| def __init__(self, abort_func): | ||
| self.hosts_by_id = {} | ||
| self.abort_func = abort_func | ||
|
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||
| def update(self, host_id_raw, prop_name_raw, value_raw): | ||
| host_id = int(host_id_raw) | ||
| prop_name = prop_name_raw.lower() | ||
| value = value_raw | ||
| if prop_name.endswith('port'): | ||
| value = int(value) | ||
| self.hosts_by_id.setdefault(host_id, Host(host_id, self.abort_func))[prop_name] = value | ||
|
|
||
| def get_target_and_connection_host(self, host_name): | ||
| """ | ||
| Find an arbitrary host that isn't the one being stopped. | ||
| Returns a tuple with connection and target host objects. | ||
| """ | ||
| connection_host = None | ||
| target_host = None | ||
| for host in self.hosts_by_id.values(): | ||
| if host.hostname == host_name: | ||
| target_host = host | ||
| elif connection_host is None: | ||
| connection_host = host | ||
| if not connection_host is None and not target_host is None: | ||
| break | ||
| return (target_host, connection_host) | ||
|
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||
|
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| @VOLT.Command( | ||
| bundles = VOLT.AdminBundle(), | ||
| description = 'Stop one host of a running VoltDB cluster.', | ||
| arguments = ( | ||
| VOLT.StringArgument('target_host', 'the target HOST name or address'), | ||
| ), | ||
| ) | ||
| def stop(runner): | ||
|
|
||
| # Exec @SystemInformation to find out about the cluster. | ||
| response = runner.call_proc('@SystemInformation', | ||
| [VOLT.FastSerializer.VOLTTYPE_STRING], | ||
| ['OVERVIEW']) | ||
|
|
||
| # Convert @SystemInformation results to objects. | ||
| hosts = Hosts(runner.abort) | ||
| for tuple in response.table(0).tuples(): | ||
| hosts.update(tuple[0], tuple[1], tuple[2]) | ||
|
|
||
| # Connect to an arbitrary host that isn't being stopped. | ||
| (thost, chost) = hosts.get_target_and_connection_host(runner.opts.target_host) | ||
| if thost is None: | ||
| runner.abort('Host not found in cluster: %s' % runner.opts.target_host) | ||
| if chost is None: | ||
| runner.abort('The entire cluster is being stopped, use "shutdown" instead.') | ||
|
|
||
| if runner.opts.username: | ||
| user_info = ', user: %s' % runner.opts.username | ||
| else: | ||
| user_info = '' | ||
| runner.info('Connecting to host: %s:%d%s' % (chost.hostname, chost.adminport, user_info)) | ||
| runner.voltdb_connect(chost.hostname, chost.adminport, | ||
| runner.opts.username, runner.opts.password) | ||
|
|
||
| # Stop the requested host using exec @StopNode HOST_ID | ||
| runner.info('Stopping host %d: %s' % (thost.id, thost.hostname)) | ||
| if not runner.opts.dryrun: | ||
| response = runner.call_proc('@StopNode', | ||
| [VOLT.FastSerializer.VOLTTYPE_INTEGER], | ||
| [thost.id], | ||
| check_status=False) | ||
| print response |
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