chore: update charm libraries (#50)

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

lib/charms/grafana_k8s/v0/grafana_dashboard.py

@@ -219,7 +219,7 @@ def __init__(self, *args):
 # Increment this PATCH version before using `charmcraft publish-lib` or reset
 # to 0 if you are raising the major API version
 
-LIBPATCH = 32
+LIBPATCH = 33
 
 logger = logging.getLogger(__name__)
 
@@ -665,14 +665,14 @@ def _template_panels(
             continue
         if not existing_templates:
             datasource = panel.get("datasource")
-            if type(datasource) == str:
+            if isinstance(datasource, str):
                 if "loki" in datasource:
                     panel["datasource"] = "${lokids}"
                 elif "grafana" in datasource:
                     continue
                 else:
                     panel["datasource"] = "${prometheusds}"
-            elif type(datasource) == dict:
+            elif isinstance(datasource, dict):
                 # In dashboards exported by Grafana 9, datasource type is dict
                 dstype = datasource.get("type", "")
                 if dstype == "loki":
@@ -686,7 +686,7 @@ def _template_panels(
                 logger.error("Unknown datasource format: skipping")
                 continue
         else:
-            if type(panel["datasource"]) == str:
+            if isinstance(panel["datasource"], str):
                 if panel["datasource"].lower() in replacements.values():
                     # Already a known template variable
                     continue
@@ -701,7 +701,7 @@ def _template_panels(
                 if replacement:
                     used_replacements.append(ds)
                 panel["datasource"] = replacement or panel["datasource"]
-            elif type(panel["datasource"]) == dict:
+            elif isinstance(panel["datasource"], dict):
                 dstype = panel["datasource"].get("type", "")
                 if panel["datasource"].get("uid", "").lower() in replacements.values():
                     # Already a known template variable
@@ -831,7 +831,7 @@ def _modify_panel(panel: dict, topology: dict, transformer: "CosTool") -> dict:
         if "datasource" not in panel.keys():
             continue
 
-        if type(panel["datasource"]) == str:
+        if isinstance(panel["datasource"], str):
             if panel["datasource"] not in known_datasources:
                 continue
             querytype = known_datasources[panel["datasource"]]

lib/charms/prometheus_k8s/v0/prometheus_scrape.py

@@ -343,9 +343,7 @@ def _on_scrape_targets_changed(self, event):
 from collections import defaultdict
 from pathlib import Path
 from typing import Any, Callable, Dict, List, Optional, Tuple, Union
-from urllib.error import HTTPError, URLError
 from urllib.parse import urlparse
-from urllib.request import urlopen
 
 import yaml
 from charms.observability_libs.v0.juju_topology import JujuTopology
@@ -370,7 +368,7 @@ def _on_scrape_targets_changed(self, event):
 
 # Increment this PATCH version before using `charmcraft publish-lib` or reset
 # to 0 if you are raising the major API version
-LIBPATCH = 38
+LIBPATCH = 39
 
 logger = logging.getLogger(__name__)
 
@@ -2266,16 +2264,7 @@ def _static_config_extra_labels(self, target: Dict[str, str]) -> Dict[str, str]:
                 logger.debug("Could not perform DNS lookup for %s", target["hostname"])
                 dns_name = target["hostname"]
             extra_info["dns_name"] = dns_name
-        label_re = re.compile(r'(?P<label>juju.*?)="(?P<value>.*?)",?')
 
-        try:
-            with urlopen(f'http://{target["hostname"]}:{target["port"]}/metrics') as resp:
-                data = resp.read().decode("utf-8").splitlines()
-                for metric in data:
-                    for match in label_re.finditer(metric):
-                        extra_info[match.group("label")] = match.group("value")
-        except (HTTPError, URLError, OSError, ConnectionResetError, Exception) as e:
-            logger.debug("Could not scrape target: %s", e)
         return extra_info
 
     @property