Revert "Feature 11071: Modular OSM installation. Remove charms, juju and lxd"
This reverts commit a0f0d8ef4f2aa0dd227ecb651002490b66498bab.
Change-Id: I92394e4074dad4e457c107c58e4ebc17d507f8b2
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/installers/charm/mongodb-exporter/src/charm.py b/installers/charm/mongodb-exporter/src/charm.py
new file mode 100755
index 0000000..0ee127c
--- /dev/null
+++ b/installers/charm/mongodb-exporter/src/charm.py
@@ -0,0 +1,275 @@
+#!/usr/bin/env python3
+# Copyright 2021 Canonical Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+# For those usages not covered by the Apache License, Version 2.0 please
+# contact: legal@canonical.com
+#
+# To get in touch with the maintainers, please contact:
+# osm-charmers@lists.launchpad.net
+##
+
+# pylint: disable=E0213
+
+from ipaddress import ip_network
+import logging
+from pathlib import Path
+from typing import NoReturn, Optional
+from urllib.parse import urlparse
+
+from ops.main import main
+from opslib.osm.charm import CharmedOsmBase, RelationsMissing
+from opslib.osm.interfaces.grafana import GrafanaDashboardTarget
+from opslib.osm.interfaces.mongo import MongoClient
+from opslib.osm.interfaces.prometheus import PrometheusScrapeTarget
+from opslib.osm.pod import (
+ ContainerV3Builder,
+ IngressResourceV3Builder,
+ PodRestartPolicy,
+ PodSpecV3Builder,
+)
+from opslib.osm.validator import ModelValidator, validator
+
+
+logger = logging.getLogger(__name__)
+
+PORT = 9216
+
+
+class ConfigModel(ModelValidator):
+ site_url: Optional[str]
+ cluster_issuer: Optional[str]
+ ingress_class: Optional[str]
+ ingress_whitelist_source_range: Optional[str]
+ tls_secret_name: Optional[str]
+ mongodb_uri: Optional[str]
+ image_pull_policy: str
+ security_context: bool
+
+ @validator("site_url")
+ def validate_site_url(cls, v):
+ if v:
+ parsed = urlparse(v)
+ if not parsed.scheme.startswith("http"):
+ raise ValueError("value must start with http")
+ return v
+
+ @validator("ingress_whitelist_source_range")
+ def validate_ingress_whitelist_source_range(cls, v):
+ if v:
+ ip_network(v)
+ return v
+
+ @validator("mongodb_uri")
+ def validate_mongodb_uri(cls, v):
+ if v and not v.startswith("mongodb://"):
+ raise ValueError("mongodb_uri is not properly formed")
+ return v
+
+ @validator("image_pull_policy")
+ def validate_image_pull_policy(cls, v):
+ values = {
+ "always": "Always",
+ "ifnotpresent": "IfNotPresent",
+ "never": "Never",
+ }
+ v = v.lower()
+ if v not in values.keys():
+ raise ValueError("value must be always, ifnotpresent or never")
+ return values[v]
+
+
+class MongodbExporterCharm(CharmedOsmBase):
+ def __init__(self, *args) -> NoReturn:
+ super().__init__(*args, oci_image="image")
+
+ # Provision Kafka relation to exchange information
+ self.mongodb_client = MongoClient(self, "mongodb")
+ self.framework.observe(self.on["mongodb"].relation_changed, self.configure_pod)
+ self.framework.observe(self.on["mongodb"].relation_broken, self.configure_pod)
+
+ # Register relation to provide a Scraping Target
+ self.scrape_target = PrometheusScrapeTarget(self, "prometheus-scrape")
+ self.framework.observe(
+ self.on["prometheus-scrape"].relation_joined, self._publish_scrape_info
+ )
+
+ # Register relation to provide a Dasboard Target
+ self.dashboard_target = GrafanaDashboardTarget(self, "grafana-dashboard")
+ self.framework.observe(
+ self.on["grafana-dashboard"].relation_joined, self._publish_dashboard_info
+ )
+
+ def _publish_scrape_info(self, event) -> NoReturn:
+ """Publishes scraping information for Prometheus.
+
+ Args:
+ event (EventBase): Prometheus relation event.
+ """
+ if self.unit.is_leader():
+ hostname = (
+ urlparse(self.model.config["site_url"]).hostname
+ if self.model.config["site_url"]
+ else self.model.app.name
+ )
+ port = str(PORT)
+ if self.model.config.get("site_url", "").startswith("https://"):
+ port = "443"
+ elif self.model.config.get("site_url", "").startswith("http://"):
+ port = "80"
+
+ self.scrape_target.publish_info(
+ hostname=hostname,
+ port=port,
+ metrics_path="/metrics",
+ scrape_interval="30s",
+ scrape_timeout="15s",
+ )
+
+ def _publish_dashboard_info(self, event) -> NoReturn:
+ """Publish dashboards for Grafana.
+
+ Args:
+ event (EventBase): Grafana relation event.
+ """
+ if self.unit.is_leader():
+ self.dashboard_target.publish_info(
+ name="osm-mongodb",
+ dashboard=Path("templates/mongodb_exporter_dashboard.json").read_text(),
+ )
+
+ def _check_missing_dependencies(self, config: ConfigModel):
+ """Check if there is any relation missing.
+
+ Args:
+ config (ConfigModel): object with configuration information.
+
+ Raises:
+ RelationsMissing: if kafka is missing.
+ """
+ missing_relations = []
+
+ if not config.mongodb_uri and self.mongodb_client.is_missing_data_in_unit():
+ missing_relations.append("mongodb")
+
+ if missing_relations:
+ raise RelationsMissing(missing_relations)
+
+ def build_pod_spec(self, image_info):
+ """Build the PodSpec to be used.
+
+ Args:
+ image_info (str): container image information.
+
+ Returns:
+ Dict: PodSpec information.
+ """
+ # Validate config
+ config = ConfigModel(**dict(self.config))
+
+ if config.mongodb_uri and not self.mongodb_client.is_missing_data_in_unit():
+ raise Exception("Mongodb data cannot be provided via config and relation")
+
+ # Check relations
+ self._check_missing_dependencies(config)
+
+ unparsed = (
+ config.mongodb_uri
+ if config.mongodb_uri
+ else self.mongodb_client.connection_string
+ )
+ parsed = urlparse(unparsed)
+ mongodb_uri = f"mongodb://{parsed.netloc.split(',')[0]}{parsed.path}"
+ if parsed.query:
+ mongodb_uri += f"?{parsed.query}"
+
+ # Create Builder for the PodSpec
+ pod_spec_builder = PodSpecV3Builder(
+ enable_security_context=config.security_context
+ )
+
+ # Add secrets to the pod
+ mongodb_secret_name = f"{self.app.name}-mongodb-secret"
+ pod_spec_builder.add_secret(mongodb_secret_name, {"uri": mongodb_uri})
+
+ # Build container
+ container_builder = ContainerV3Builder(
+ self.app.name,
+ image_info,
+ config.image_pull_policy,
+ run_as_non_root=config.security_context,
+ )
+ container_builder.add_port(name="exporter", port=PORT)
+ container_builder.add_http_readiness_probe(
+ path="/api/health",
+ port=PORT,
+ initial_delay_seconds=10,
+ period_seconds=10,
+ timeout_seconds=5,
+ success_threshold=1,
+ failure_threshold=3,
+ )
+ container_builder.add_http_liveness_probe(
+ path="/api/health",
+ port=PORT,
+ initial_delay_seconds=60,
+ timeout_seconds=30,
+ failure_threshold=10,
+ )
+
+ container_builder.add_secret_envs(mongodb_secret_name, {"MONGODB_URI": "uri"})
+ container = container_builder.build()
+
+ # Add container to PodSpec
+ pod_spec_builder.add_container(container)
+
+ # Add Pod restart policy
+ restart_policy = PodRestartPolicy()
+ restart_policy.add_secrets(secret_names=(mongodb_secret_name,))
+ pod_spec_builder.set_restart_policy(restart_policy)
+
+ # Add ingress resources to PodSpec if site url exists
+ if config.site_url:
+ parsed = urlparse(config.site_url)
+ annotations = {}
+ if config.ingress_class:
+ annotations["kubernetes.io/ingress.class"] = config.ingress_class
+ ingress_resource_builder = IngressResourceV3Builder(
+ f"{self.app.name}-ingress", annotations
+ )
+
+ if config.ingress_whitelist_source_range:
+ annotations[
+ "nginx.ingress.kubernetes.io/whitelist-source-range"
+ ] = config.ingress_whitelist_source_range
+
+ if config.cluster_issuer:
+ annotations["cert-manager.io/cluster-issuer"] = config.cluster_issuer
+
+ if parsed.scheme == "https":
+ ingress_resource_builder.add_tls(
+ [parsed.hostname], config.tls_secret_name
+ )
+ else:
+ annotations["nginx.ingress.kubernetes.io/ssl-redirect"] = "false"
+
+ ingress_resource_builder.add_rule(parsed.hostname, self.app.name, PORT)
+ ingress_resource = ingress_resource_builder.build()
+ pod_spec_builder.add_ingress_resource(ingress_resource)
+
+ return pod_spec_builder.build()
+
+
+if __name__ == "__main__":
+ main(MongodbExporterCharm)