chore: update charm libraries (#213)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: arturo-seijas <[email protected]>

lib/charms/grafana_agent/v0/cos_agent.py

@@ -1,4 +1,4 @@
-# Copyright 2024 Canonical Ltd.
+# Copyright 2023 Canonical Ltd.
 # See LICENSE file for licensing details.
 
 r"""## Overview.
@@ -206,17 +206,15 @@ def __init__(self, *args):
 ```
 """
 
-import base64
 import json
 import logging
-import lzma
 from collections import namedtuple
 from itertools import chain
 from pathlib import Path
 from typing import TYPE_CHECKING, Any, Callable, ClassVar, Dict, List, Optional, Set, Union
 
 import pydantic
-from cosl import JujuTopology
+from cosl import GrafanaDashboard, JujuTopology
 from cosl.rules import AlertRules
 from ops.charm import RelationChangedEvent
 from ops.framework import EventBase, EventSource, Object, ObjectEvents
@@ -236,7 +234,7 @@ class _MetricsEndpointDict(TypedDict):
 
 LIBID = "dc15fa84cef84ce58155fb84f6c6213a"
 LIBAPI = 0
-LIBPATCH = 6
+LIBPATCH = 7
 
 PYDEPS = ["cosl", "pydantic < 2"]
 
@@ -251,31 +249,6 @@ class _MetricsEndpointDict(TypedDict):
 SnapEndpoint = namedtuple("SnapEndpoint", "owner, name")
 
 
-class GrafanaDashboard(str):
-    """Grafana Dashboard encoded json; lzma-compressed."""
-
-    # TODO Replace this with a custom type when pydantic v2 released (end of 2023 Q1?)
-    # https://github.com/pydantic/pydantic/issues/4887
-    @staticmethod
-    def _serialize(raw_json: Union[str, bytes]) -> "GrafanaDashboard":
-        if not isinstance(raw_json, bytes):
-            raw_json = raw_json.encode("utf-8")
-        encoded = base64.b64encode(lzma.compress(raw_json)).decode("utf-8")
-        return GrafanaDashboard(encoded)
-
-    def _deserialize(self) -> Dict:
-        try:
-            raw = lzma.decompress(base64.b64decode(self.encode("utf-8"))).decode()
-            return json.loads(raw)
-        except json.decoder.JSONDecodeError as e:
-            logger.error("Invalid Dashboard format: %s", e)
-            return {}
-
-    def __repr__(self):
-        """Return string representation of self."""
-        return "<GrafanaDashboard>"
-
-
 class CosAgentProviderUnitData(pydantic.BaseModel):
     """Unit databag model for `cos-agent` relation."""
 
@@ -748,6 +721,10 @@ def metrics_jobs(self) -> List[Dict]:
                         "job_name": job["job_name"],
                         "metrics_path": job["path"],
                         "static_configs": [{"targets": [f"localhost:{job['port']}"]}],
+                        # We include insecure_skip_verify because we are always scraping localhost.
+                        # Even if we have the certs for the scrape targets, we'd rather specify the scrape
+                        # jobs with localhost rather than the SAN DNS the cert was issued for.
+                        "tls_config": {"insecure_skip_verify": True},
                     }
 
                 scrape_jobs.append(job)