+++ /dev/null
-#!/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
-##
-
-import logging
-from ipaddress import ip_network
-from typing import Any, Dict, List
-from urllib.parse import urlparse
-
-logger = logging.getLogger(__name__)
-
-
-def _validate_ip_network(network: str) -> bool:
- """Validate IP network.
-
- Args:
- network (str): IP network range.
-
- Returns:
- bool: True if valid, false otherwise.
- """
- if not network:
- return True
-
- try:
- ip_network(network)
- except ValueError:
- return False
-
- return True
-
-
-def _validate_data(config_data: Dict[str, Any], relation_data: Dict[str, Any]) -> bool:
- """Validates passed information.
-
- Args:
- config_data (Dict[str, Any]): configuration information.
- relation_data (Dict[str, Any]): relation information
-
- Raises:
- ValueError: when config and/or relation data is not valid.
- """
- config_validators = {
- "site_url": lambda value, _: isinstance(value, str)
- if value is not None
- else True,
- "ingress_whitelist_source_range": lambda value, _: _validate_ip_network(value),
- "tls_secret_name": lambda value, _: isinstance(value, str)
- if value is not None
- else True,
- }
- relation_validators = {
- "kafka_host": lambda value, _: isinstance(value, str) and len(value) > 0,
- "kafka_port": lambda value, _: isinstance(value, str)
- and len(value) > 0
- and int(value) > 0,
- }
- problems = []
-
- for key, validator in config_validators.items():
- valid = validator(config_data.get(key), config_data)
-
- if not valid:
- problems.append(key)
-
- for key, validator in relation_validators.items():
- valid = validator(relation_data.get(key), relation_data)
-
- if not valid:
- problems.append(key)
-
- if len(problems) > 0:
- raise ValueError("Errors found in: {}".format(", ".join(problems)))
-
- return True
-
-
-def _make_pod_ports(port: int) -> List[Dict[str, Any]]:
- """Generate pod ports details.
-
- Args:
- port (int): port to expose.
-
- Returns:
- List[Dict[str, Any]]: pod port details.
- """
- return [
- {"name": "prometheus-kafka-exporter", "containerPort": port, "protocol": "TCP"}
- ]
-
-
-def _make_pod_envconfig(
- config: Dict[str, Any], relation_state: Dict[str, Any]
-) -> Dict[str, Any]:
- """Generate pod environment configuration.
-
- Args:
- config (Dict[str, Any]): configuration information.
- relation_state (Dict[str, Any]): relation state information.
-
- Returns:
- Dict[str, Any]: pod environment configuration.
- """
- envconfig = {}
-
- return envconfig
-
-
-def _make_pod_ingress_resources(
- config: Dict[str, Any], app_name: str, port: int
-) -> List[Dict[str, Any]]:
- """Generate pod ingress resources.
-
- Args:
- config (Dict[str, Any]): configuration information.
- app_name (str): application name.
- port (int): port to expose.
-
- Returns:
- List[Dict[str, Any]]: pod ingress resources.
- """
- site_url = config.get("site_url")
-
- if not site_url:
- return
-
- parsed = urlparse(site_url)
-
- if not parsed.scheme.startswith("http"):
- return
-
- ingress_whitelist_source_range = config["ingress_whitelist_source_range"]
-
- annotations = {}
-
- if ingress_whitelist_source_range:
- annotations[
- "nginx.ingress.kubernetes.io/whitelist-source-range"
- ] = ingress_whitelist_source_range
-
- ingress_spec_tls = None
-
- if parsed.scheme == "https":
- ingress_spec_tls = [{"hosts": [parsed.hostname]}]
- tls_secret_name = config["tls_secret_name"]
- if tls_secret_name:
- ingress_spec_tls[0]["secretName"] = tls_secret_name
- else:
- annotations["nginx.ingress.kubernetes.io/ssl-redirect"] = "false"
-
- ingress = {
- "name": "{}-ingress".format(app_name),
- "annotations": annotations,
- "spec": {
- "rules": [
- {
- "host": parsed.hostname,
- "http": {
- "paths": [
- {
- "path": "/",
- "backend": {
- "serviceName": app_name,
- "servicePort": port,
- },
- }
- ]
- },
- }
- ]
- },
- }
- if ingress_spec_tls:
- ingress["spec"]["tls"] = ingress_spec_tls
-
- return [ingress]
-
-
-def _make_readiness_probe(port: int) -> Dict[str, Any]:
- """Generate readiness probe.
-
- Args:
- port (int): service port.
-
- Returns:
- Dict[str, Any]: readiness probe.
- """
- return {
- "httpGet": {
- "path": "/api/health",
- "port": port,
- },
- "initialDelaySeconds": 10,
- "periodSeconds": 10,
- "timeoutSeconds": 5,
- "successThreshold": 1,
- "failureThreshold": 3,
- }
-
-
-def _make_liveness_probe(port: int) -> Dict[str, Any]:
- """Generate liveness probe.
-
- Args:
- port (int): service port.
-
- Returns:
- Dict[str, Any]: liveness probe.
- """
- return {
- "httpGet": {
- "path": "/api/health",
- "port": port,
- },
- "initialDelaySeconds": 60,
- "timeoutSeconds": 30,
- "failureThreshold": 10,
- }
-
-
-def _make_pod_command(relation: Dict[str, Any]) -> List[str]:
- """Generate the startup command.
-
- Args:
- relation (Dict[str, Any]): Relation information.
-
- Returns:
- List[str]: command to startup the process.
- """
- command = [
- "kafka-exporter",
- "--kafka.server={}:{}".format(
- relation.get("kafka_host"), relation.get("kafka_port")
- ),
- ]
-
- return command
-
-
-def make_pod_spec(
- image_info: Dict[str, str],
- config: Dict[str, Any],
- relation_state: Dict[str, Any],
- app_name: str = "prometheus-kafka-exporter",
- port: int = 9308,
-) -> Dict[str, Any]:
- """Generate the pod spec information.
-
- Args:
- image_info (Dict[str, str]): Object provided by
- OCIImageResource("image").fetch().
- config (Dict[str, Any]): Configuration information.
- relation_state (Dict[str, Any]): Relation state information.
- app_name (str, optional): Application name. Defaults to "ro".
- port (int, optional): Port for the container. Defaults to 9090.
-
- Returns:
- Dict[str, Any]: Pod spec dictionary for the charm.
- """
- if not image_info:
- return None
-
- _validate_data(config, relation_state)
-
- ports = _make_pod_ports(port)
- env_config = _make_pod_envconfig(config, relation_state)
- readiness_probe = _make_readiness_probe(port)
- liveness_probe = _make_liveness_probe(port)
- ingress_resources = _make_pod_ingress_resources(config, app_name, port)
- command = _make_pod_command(relation_state)
-
- return {
- "version": 3,
- "containers": [
- {
- "name": app_name,
- "imageDetails": image_info,
- "imagePullPolicy": "Always",
- "ports": ports,
- "envConfig": env_config,
- "command": command,
- "kubernetes": {
- "readinessProbe": readiness_probe,
- "livenessProbe": liveness_probe,
- },
- }
- ],
- "kubernetesResources": {
- "ingressResources": ingress_resources or [],
- },
- }
projects / osm / devops.git / blobdiff