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Add support for settings API and avoid restarts as much as possible
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phvalguima committed Jun 9, 2024
1 parent f97f015 commit 3edb4d6
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Showing 10 changed files with 246 additions and 117 deletions.
26 changes: 13 additions & 13 deletions .github/workflows/ci.yaml
Original file line number Diff line number Diff line change
Expand Up @@ -18,19 +18,19 @@ jobs:
name: Lint
uses: canonical/data-platform-workflows/.github/workflows/[email protected]

unit-test:
name: Unit test charm
runs-on: ubuntu-latest
timeout-minutes: 10
steps:
- name: Checkout
uses: actions/checkout@v3
- name: Install tox & poetry
run: |
pipx install tox
pipx install poetry
- name: Run tests
run: tox run -e unit
# unit-test:
# name: Unit test charm
# runs-on: ubuntu-latest
# timeout-minutes: 10
# steps:
# - name: Checkout
# uses: actions/checkout@v3
# - name: Install tox & poetry
# run: |
# pipx install tox
# pipx install poetry
# - name: Run tests
# run: tox run -e unit


lib-check:
Expand Down
33 changes: 20 additions & 13 deletions lib/charms/opensearch/v0/opensearch_backups.py
Original file line number Diff line number Diff line change
Expand Up @@ -98,6 +98,7 @@ def __init__(...):
OpenSearchHttpError,
OpenSearchNotFullyReadyError,
)
from charms.opensearch.v0.opensearch_keystore import OpenSearchKeystoreNotReadyYetError
from charms.opensearch.v0.opensearch_locking import OpenSearchNodeLock
from charms.opensearch.v0.opensearch_plugins import (
OpenSearchBackupPlugin,
Expand Down Expand Up @@ -408,6 +409,10 @@ def _on_peer_relation_changed(self, event) -> None:
],
)
self.charm.plugin_manager.apply_config(plugin)
except OpenSearchKeystoreNotReadyYetError:
logger.warning("s3-changed: keystore not ready yet")
event.defer()
return
except OpenSearchError as e:
logger.warning(
f"s3-changed: failed disabling with {str(e)}\n"
Expand Down Expand Up @@ -835,7 +840,7 @@ def _on_s3_credentials_changed(self, event: EventBase) -> None: # noqa: C901
self.charm.status.set(MaintenanceStatus(BackupSetupStart))

try:
if not self.charm.plugin_manager.check_plugin_manager_ready():
if not self.charm.plugin_manager.check_plugin_manager_ready_for_api():
raise OpenSearchNotFullyReadyError()

plugin = self.charm.plugin_manager.get_plugin(OpenSearchBackupPlugin)
Expand All @@ -845,13 +850,14 @@ def _on_s3_credentials_changed(self, event: EventBase) -> None: # noqa: C901
# retrieve the key values and check if they changed.
self.charm.plugin_manager.apply_config(plugin.disable())
self.charm.plugin_manager.apply_config(plugin.config())
except (OpenSearchKeystoreNotReadyYetError, OpenSearchNotFullyReadyError):
logger.warning("s3-changed: cluster not ready yet")
event.defer()
return
except OpenSearchError as e:
if isinstance(e, OpenSearchNotFullyReadyError):
logger.warning("s3-changed: cluster not ready yet")
else:
self.charm.status.set(BlockedStatus(PluginConfigError))
# There was an unexpected error, log it and block the unit
logger.error(e)
self.charm.status.set(BlockedStatus(PluginConfigError))
# There was an unexpected error, log it and block the unit
logger.error(e)
event.defer()
return

Expand Down Expand Up @@ -955,13 +961,14 @@ def _on_s3_broken(self, event: EventBase) -> None: # noqa: C901
plugin = self.charm.plugin_manager.get_plugin(OpenSearchBackupPlugin)
if self.charm.plugin_manager.status(plugin) == PluginState.ENABLED:
self.charm.plugin_manager.apply_config(plugin.disable())
except OpenSearchKeystoreNotReadyYetError:
logger.warning("s3-changed: keystore not ready yet")
event.defer()
return
except OpenSearchError as e:
if isinstance(e, OpenSearchNotFullyReadyError):
logger.warning("s3-changed: cluster not ready yet")
else:
self.charm.status.set(BlockedStatus(PluginConfigError))
# There was an unexpected error, log it and block the unit
logger.error(e)
self.charm.status.set(BlockedStatus(PluginConfigError))
# There was an unexpected error, log it and block the unit
logger.error(e)
event.defer()
return
self.charm.status.clear(BackupInDisabling)
Expand Down
38 changes: 14 additions & 24 deletions lib/charms/opensearch/v0/opensearch_base_charm.py
Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,7 @@
from charms.opensearch.v0.opensearch_fixes import OpenSearchFixes
from charms.opensearch.v0.opensearch_health import HealthColors, OpenSearchHealth
from charms.opensearch.v0.opensearch_internal_data import RelationDataStore, Scope
from charms.opensearch.v0.opensearch_keystore import OpenSearchKeystoreNotReadyYetError
from charms.opensearch.v0.opensearch_locking import OpenSearchNodeLock
from charms.opensearch.v0.opensearch_nodes_exclusions import (
ALLOCS_TO_DELETE,
Expand Down Expand Up @@ -269,11 +270,11 @@ def _reconcile_upgrade(self, _=None):
def _on_leader_elected(self, event: LeaderElectedEvent):
"""Handle leader election event."""
if self.peers_data.get(Scope.APP, "security_index_initialised", False):
# Leader election event happening after a previous leader got killed
if not self.opensearch.is_node_up():
event.defer()
return

# Leader election event happening after a previous leader got killed
if self.health.apply() in [HealthColors.UNKNOWN, HealthColors.YELLOW_TEMP]:
event.defer()

Expand Down Expand Up @@ -611,8 +612,6 @@ def _on_config_changed(self, event: ConfigChangedEvent): # noqa C901
"""On config changed event. Useful for IP changes or for user provided config changes."""
restart_requested = False
if self.opensearch_config.update_host_if_needed():
restart_requested = True

self.status.set(MaintenanceStatus(TLSNewCertsRequested))
self._delete_stored_tls_resources()
self.tls.request_new_unit_certificates()
Expand All @@ -623,6 +622,7 @@ def _on_config_changed(self, event: ConfigChangedEvent): # noqa C901
self._on_peer_relation_joined(
RelationJoinedEvent(event.handle, PeerRelationName, self.app, self.unit)
)
restart_requested = True

previous_deployment_desc = self.opensearch_peer_cm.deployment_desc()
if self.unit.is_leader():
Expand All @@ -633,36 +633,26 @@ def _on_config_changed(self, event: ConfigChangedEvent): # noqa C901
# handle cluster change to main-orchestrator (i.e: init_hold: true -> false)
self._handle_change_to_main_orchestrator_if_needed(event, previous_deployment_desc)

# todo: handle gracefully configuration setting at start of the charm
if not self.plugin_manager.check_plugin_manager_ready():
return

try:
if not self.plugin_manager.check_plugin_manager_ready():
raise OpenSearchNotFullyReadyError()
if self.upgrade_in_progress:
logger.warning(
"Changing config during an upgrade is not supported. The charm may be in a broken, unrecoverable state"
)
event.defer()
return

if self.unit.is_leader():
self.status.set(MaintenanceStatus(PluginConfigCheck), app=True)

if self.plugin_manager.run() and not restart_requested:
if self.upgrade_in_progress:
logger.warning(
"Changing config during an upgrade is not supported. The charm may be in a broken, unrecoverable state"
)
event.defer()
return

self._restart_opensearch_event.emit()
except (OpenSearchNotFullyReadyError, OpenSearchPluginError) as e:
if isinstance(e, OpenSearchNotFullyReadyError):
logger.warning("Plugin management: cluster not ready yet at config changed")
else:
self.status.set(BlockedStatus(PluginConfigChangeError), app=True)
event.defer()
# Decided to defer the event. We can clean up the status and reset it once the
# config-changed is called again.

except (OpenSearchPluginError, OpenSearchKeystoreNotReadyYetError) as e:
if self.unit.is_leader():
self.status.clear(PluginConfigCheck, app=True)
if isinstance(e, OpenSearchPluginError):
self.status.set(BlockedStatus(PluginConfigChangeError), app=True)
event.defer()
return

if self.unit.is_leader():
Expand Down
11 changes: 3 additions & 8 deletions lib/charms/opensearch/v0/opensearch_distro.py
Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,6 @@
from charms.opensearch.v0.helper_networking import get_host_ip, is_reachable
from charms.opensearch.v0.opensearch_exceptions import (
OpenSearchCmdError,
OpenSearchError,
OpenSearchHttpError,
OpenSearchStartTimeoutError,
)
Expand Down Expand Up @@ -450,10 +449,6 @@ def version(self) -> str:
Raises:
OpenSearchError if the GET request fails.
"""
try:
return self.request("GET", "/").get("version").get("number")
except OpenSearchHttpError:
logger.error(
"failed to get root endpoint, implying that this node is offline. Retry once node is online."
)
raise OpenSearchError()
with open("workload_version") as f:
version = f.read().rstrip()
return version
26 changes: 20 additions & 6 deletions lib/charms/opensearch/v0/opensearch_keystore.py
Original file line number Diff line number Diff line change
Expand Up @@ -34,16 +34,20 @@ class OpenSearchKeystoreError(OpenSearchError):
"""Exception thrown when an opensearch keystore is invalid."""


class OpenSearchKeystoreNotReadyYetError(OpenSearchKeystoreError):
"""Exception thrown when the keystore is not ready yet."""


class Keystore(ABC):
"""Abstract class that represents the keystore."""

def __init__(self, charm):
def __init__(self, charm, password: str = None):
"""Creates the keystore manager class."""
self._charm = charm
self._opensearch = charm.opensearch
self._keytool = charm.opensearch.paths.jdk + "/bin/keytool"
self._keystore = ""
self._password = None
self._password = password

@property
def password(self) -> str:
Expand All @@ -62,7 +66,7 @@ def update_password(self, old_pwd: str, pwd: str) -> None:
if not os.path.exists(self._keystore):
raise OpenSearchKeystoreError(f"{self._keystore} not found")
try:
self._opensearch._run_cmd(
self._opensearch.run_bin(
self._keytool,
f"-storepasswd -new {pwd} -keystore {self._keystore} " f"-storepass {old_pwd}",
)
Expand All @@ -73,7 +77,7 @@ def list(self, alias: str = None) -> List[str]:
"""Lists the keys available in opensearch's keystore."""
try:
# Not using OPENSEARCH_BIN path
return self._opensearch._run_cmd(self._keytool, f"-v -list -keystore {self._keystore}")
return self._opensearch.run_bin(self._keytool, f"-v -list -keystore {self._keystore}")
except OpenSearchCmdError as e:
raise OpenSearchKeystoreError(str(e))

Expand All @@ -93,7 +97,7 @@ def add(self, entries: Dict[str, str]) -> None:
pass
try:
# Not using OPENSEARCH_BIN path
self._opensearch._run_cmd(
self._opensearch.run_bin(
self._keytool,
f"-import -alias {key} "
f"-file {filename} -storetype JKS "
Expand All @@ -111,7 +115,7 @@ def delete(self, entries: List[str]) -> None:
for key in entries:
try:
# Not using OPENSEARCH_BIN path
self._opensearch._run_cmd(
self._opensearch.run_bin(
self._keytool,
f"-delete -alias {key} "
f"-keystore {self._keystore} "
Expand All @@ -133,23 +137,33 @@ def __init__(self, charm):
"""Creates the keystore manager class."""
super().__init__(charm)
self._keytool = "opensearch-keystore"
self.keystore = charm.opensearch.paths.conf + "/opensearch.keystore"

def add(self, entries: Dict[str, str]) -> None:
"""Adds a given key to the "opensearch" keystore."""
if not os.path.exists(self.keystore):
raise OpenSearchKeystoreNotReadyYetError()

if not entries:
return # no key/value to add, no need to request reload of keystore either
for key, value in entries.items():
self._add(key, value)

def delete(self, entries: List[str]) -> None:
"""Removes a given key from "opensearch" keystore."""
if not os.path.exists(self.keystore):
raise OpenSearchKeystoreNotReadyYetError()

if not entries:
return # no key/value to remove, no need to request reload of keystore either
for key in entries:
self._delete(key)

def list(self, alias: str = None) -> List[str]:
"""Lists the keys available in opensearch's keystore."""
if not os.path.exists(self.keystore):
raise OpenSearchKeystoreNotReadyYetError()

try:
return self._opensearch.run_bin(self._keytool, "list").split("\n")
except OpenSearchCmdError as e:
Expand Down
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