107 lines
3.9 KiB
Python
107 lines
3.9 KiB
Python
from supermutes.dot import dotify
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from chartbuilder import ChartBuilder
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from tiller import Tiller
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from logutil import LOG
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import yaml
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import difflib
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class Armada(object):
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'''
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This is the main Armada class handling the Armada
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workflows
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'''
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def __init__(self, args):
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'''
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Initialize the Armada Engine and establish
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a connection to Tiller
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'''
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self.args = args
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# internalize config
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self.config = yaml.load(open(args.config).read())
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self.tiller = Tiller()
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def find_release_chart(self, known_releases, name):
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'''
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Find a release given a list of known_releases and a release name
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'''
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for chart_name, version, chart, values in known_releases:
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if chart_name == name:
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return chart, values
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def sync(self):
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'''
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Syncronize Helm with the Armada Config(s)
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'''
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# extract known charts on tiller right now
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known_releases = self.tiller.list_charts()
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for release in known_releases:
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LOG.debug("Release {}, Version {} found on tiller".format(release[0], release[1]))
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for entry in self.config['armada']['charts']:
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chart = dotify(entry['chart'])
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values = entry['chart']['values']
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if chart.release_name is None:
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continue
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# initialize helm chart and request a
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# protoc helm chart object which will
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# pull the sources down and walk the
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# dependencies
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chartbuilder = ChartBuilder(chart)
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protoc_chart = chartbuilder.get_helm_chart()
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# determine install or upgrade by examining known releases
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if chart.release_name in [x[0] for x in known_releases]:
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# indicate to the end user what path we are taking
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LOG.info("Upgrading release {}".format(chart.release_name))
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# extract the installed chart and installed values from the latest release so we can compare to the intended state
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installed_chart, installed_values = self.find_release_chart(known_releases, chart.release_name)
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# show delta for both the chart templates and the chart values
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# TODO(alanmeadows) account for .files differences once we support those
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self.show_diff(chart, installed_chart, installed_values, chartbuilder.dump(), values)
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# do actual update
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self.tiller.update_release(protoc_chart, self.args.dry_run, chart.release_name, disable_hooks=chart.upgrade.no_hooks, values=yaml.safe_dump(values))
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# process install
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else:
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LOG.info("Installing release {}".format(chart.release_name))
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self.tiller.install_release(protoc_chart, self.args.dry_run, chart.release_name, chart.namespace, values=yaml.safe_dump(values))
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LOG.debug("Cleaning up chart source in {}".format(chartbuilder.source_directory))
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chartbuilder.source_cleanup()
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def show_diff(self, chart, installed_chart, installed_values, target_chart, target_values):
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'''
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Produce a unified diff of the installed chart vs our intention
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TODO(alanmeadows): This needs to be rewritten to produce better
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unified diff output and avoid the use of print
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'''
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chart_diff = list(difflib.unified_diff(installed_chart.SerializeToString().split('\n'), target_chart.split('\n')))
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if len(chart_diff) > 0:
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LOG.info("Chart Unified Diff ({})".format(chart.release_name))
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for line in chart_diff:
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print line
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values_diff = list(difflib.unified_diff(installed_values.split('\n'), yaml.safe_dump(target_values).split('\n')))
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if len(values_diff) > 0:
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LOG.info("Values Unified Diff ({})".format(chart.release_name))
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for line in values_diff:
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print line
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