61 lines
1.7 KiB
Python
Executable File
61 lines
1.7 KiB
Python
Executable File
#!/usr/bin/env python3
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import logging
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from pathlib import Path
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from subprocess import check_call, check_output
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from ops.charm import CharmBase
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from ops.main import main
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from ops.model import ActiveStatus
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log = logging.getLogger(__name__)
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class UbuntuCharm(CharmBase):
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def __init__(self, *args):
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"""Initialize charm.
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Setup hook event observers and any other basic initialization.
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"""
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super().__init__(*args)
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for event in (
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self.on.install,
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self.on.leader_elected,
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self.on.upgrade_charm,
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self.on.post_series_upgrade,
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):
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self.framework.observe(event, self._set_version)
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self.framework.observe(self.on.config_changed, self._update_hostname)
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def _set_version(self, _):
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"""Set application version.
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Invoked for relevant hook events and, on the leader unit, determine and
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set the application-level workload version to the Ubuntu version upon
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which the charm is running.
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"""
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self.unit.status = ActiveStatus()
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if not self.unit.is_leader():
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return
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try:
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output = check_output(["lsb_release", "-r", "-s"])
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version = output.decode("utf8").strip()
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self.unit.set_workload_version(version)
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except Exception:
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log.exception("Error getting release")
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def _update_hostname(self, event):
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"""Update the machine hostname based on the config option."""
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hostname = self.config["hostname"]
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if not hostname:
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return
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Path("/etc/hostname").write_text(hostname)
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check_call(["hostname", hostname])
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if __name__ == "__main__":
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main(UbuntuCharm)
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