95f21a133d
See https://mypy.readthedocs.io/en/stable/cheat_sheet_py3.html#classes > For instance methods, omit type for "self"
248 lines
8.3 KiB
Python
248 lines
8.3 KiB
Python
from typing import Iterable
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import nagiosplugin
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from . import _log
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from .types import APIError, ConnectionInfo, PatroniResource, handle_unknown
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class NodeIsPrimary(PatroniResource):
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def probe(self) -> Iterable[nagiosplugin.Metric]:
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try:
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self.rest_api("primary")
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except APIError:
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return [nagiosplugin.Metric("is_primary", 0)]
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return [nagiosplugin.Metric("is_primary", 1)]
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class NodeIsPrimarySummary(nagiosplugin.Summary):
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def ok(self, results: nagiosplugin.Result) -> str:
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return "This node is the primary with the leader lock."
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@handle_unknown
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def problem(self, results: nagiosplugin.Result) -> str:
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return "This node is not the primary with the leader lock."
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class NodeIsLeader(PatroniResource):
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def __init__(
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self, connection_info: ConnectionInfo, check_is_standby_leader: bool
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) -> None:
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super().__init__(connection_info)
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self.check_is_standby_leader = check_is_standby_leader
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def probe(self) -> Iterable[nagiosplugin.Metric]:
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apiname = "leader"
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if self.check_is_standby_leader:
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apiname = "standby-leader"
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try:
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self.rest_api(apiname)
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except APIError:
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return [nagiosplugin.Metric("is_leader", 0)]
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return [nagiosplugin.Metric("is_leader", 1)]
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class NodeIsLeaderSummary(nagiosplugin.Summary):
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def __init__(self, check_is_standby_leader: bool) -> None:
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if check_is_standby_leader:
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self.leader_kind = "standby leader"
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else:
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self.leader_kind = "leader"
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def ok(self, results: nagiosplugin.Result) -> str:
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return f"This node is a {self.leader_kind} node."
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@handle_unknown
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def problem(self, results: nagiosplugin.Result) -> str:
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return f"This node is not a {self.leader_kind} node."
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class NodeIsReplica(PatroniResource):
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def __init__(
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self,
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connection_info: ConnectionInfo,
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max_lag: str,
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check_is_sync: bool,
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check_is_async: bool,
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) -> None:
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super().__init__(connection_info)
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self.max_lag = max_lag
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self.check_is_sync = check_is_sync
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self.check_is_async = check_is_async
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def probe(self) -> Iterable[nagiosplugin.Metric]:
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try:
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if self.check_is_sync:
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api_name = "synchronous"
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elif self.check_is_async:
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api_name = "asynchronous"
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else:
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api_name = "replica"
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if self.max_lag is None:
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self.rest_api(api_name)
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else:
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self.rest_api(f"{api_name}?lag={self.max_lag}")
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except APIError:
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return [nagiosplugin.Metric("is_replica", 0)]
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return [nagiosplugin.Metric("is_replica", 1)]
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class NodeIsReplicaSummary(nagiosplugin.Summary):
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def __init__(self, lag: str, check_is_sync: bool, check_is_async: bool) -> None:
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self.lag = lag
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if check_is_sync:
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self.replica_kind = "synchronous replica"
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elif check_is_async:
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self.replica_kind = "asynchronous replica"
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else:
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self.replica_kind = "replica"
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def ok(self, results: nagiosplugin.Result) -> str:
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if self.lag is None:
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return (
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f"This node is a running {self.replica_kind} with no noloadbalance tag."
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)
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return f"This node is a running {self.replica_kind} with no noloadbalance tag and the lag is under {self.lag}."
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@handle_unknown
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def problem(self, results: nagiosplugin.Result) -> str:
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if self.lag is None:
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return f"This node is not a running {self.replica_kind} with no noloadbalance tag."
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return f"This node is not a running {self.replica_kind} with no noloadbalance tag and a lag under {self.lag}."
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class NodeIsPendingRestart(PatroniResource):
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def probe(self) -> Iterable[nagiosplugin.Metric]:
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item_dict = self.rest_api("patroni")
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is_pending_restart = item_dict.get("pending_restart", False)
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return [
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nagiosplugin.Metric(
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"is_pending_restart",
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1 if is_pending_restart else 0,
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)
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]
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class NodeIsPendingRestartSummary(nagiosplugin.Summary):
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def ok(self, results: nagiosplugin.Result) -> str:
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return "This node doesn't have the pending restart flag."
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@handle_unknown
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def problem(self, results: nagiosplugin.Result) -> str:
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return "This node has the pending restart flag."
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class NodeTLHasChanged(PatroniResource):
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def __init__(
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self,
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connection_info: ConnectionInfo,
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timeline: str, # Always contains the old timeline
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state_file: str, # Only used to update the timeline in the state_file (when needed)
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save: bool, # save timeline in state file
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) -> None:
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super().__init__(connection_info)
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self.state_file = state_file
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self.timeline = timeline
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self.save = save
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def probe(self) -> Iterable[nagiosplugin.Metric]:
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item_dict = self.rest_api("patroni")
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new_tl = item_dict["timeline"]
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_log.debug("save result: %(issave)s", {"issave": self.save})
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old_tl = self.timeline
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if self.state_file is not None and self.save:
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_log.debug(
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"saving new timeline to state file / cookie %(state_file)s",
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{"state_file": self.state_file},
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)
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cookie = nagiosplugin.Cookie(self.state_file)
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cookie.open()
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cookie["timeline"] = new_tl
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cookie.commit()
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cookie.close()
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_log.debug(
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"Tl data: old tl %(old_tl)s, new tl %(new_tl)s",
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{"old_tl": old_tl, "new_tl": new_tl},
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)
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# The actual check
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yield nagiosplugin.Metric(
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"is_timeline_changed",
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1 if str(new_tl) != str(old_tl) else 0,
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)
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# The performance data : the timeline number
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yield nagiosplugin.Metric("timeline", new_tl)
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class NodeTLHasChangedSummary(nagiosplugin.Summary):
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def __init__(self, timeline: str) -> None:
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self.timeline = timeline
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def ok(self, results: nagiosplugin.Result) -> str:
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return f"The timeline is still {self.timeline}."
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@handle_unknown
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def problem(self, results: nagiosplugin.Result) -> str:
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return f"The expected timeline was {self.timeline} got {results['timeline'].metric}."
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class NodePatroniVersion(PatroniResource):
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def __init__(self, connection_info: ConnectionInfo, patroni_version: str) -> None:
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super().__init__(connection_info)
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self.patroni_version = patroni_version
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def probe(self) -> Iterable[nagiosplugin.Metric]:
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item_dict = self.rest_api("patroni")
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version = item_dict["patroni"]["version"]
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_log.debug(
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"Version data: patroni version %(version)s input version %(patroni_version)s",
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{"version": version, "patroni_version": self.patroni_version},
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)
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# The actual check
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return [
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nagiosplugin.Metric(
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"is_version_ok",
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1 if version == self.patroni_version else 0,
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)
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]
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class NodePatroniVersionSummary(nagiosplugin.Summary):
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def __init__(self, patroni_version: str) -> None:
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self.patroni_version = patroni_version
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def ok(self, results: nagiosplugin.Result) -> str:
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return f"Patroni's version is {self.patroni_version}."
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@handle_unknown
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def problem(self, results: nagiosplugin.Result) -> str:
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# FIXME find a way to make the following work, check is perf data can be strings
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# return f"The expected patroni version was {self.patroni_version} got {results['patroni_version'].metric}."
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return f"Patroni's version is not {self.patroni_version}."
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class NodeIsAlive(PatroniResource):
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def probe(self) -> Iterable[nagiosplugin.Metric]:
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try:
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self.rest_api("liveness")
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except APIError:
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return [nagiosplugin.Metric("is_alive", 0)]
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return [nagiosplugin.Metric("is_alive", 1)]
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class NodeIsAliveSummary(nagiosplugin.Summary):
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def ok(self, results: nagiosplugin.Result) -> str:
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return "This node is alive (patroni is running)."
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@handle_unknown
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def problem(self, results: nagiosplugin.Result) -> str:
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return "This node is not alive (patroni is not running)."
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