--- /dev/null
+#!/usr/bin/env python3
+# Copyright 2020 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 pydantic import (
+ BaseModel,
+ conint,
+ IPvAnyNetwork,
+ PositiveInt,
+ validator,
+)
+from typing import Any, Dict, List, Optional
+from urllib.parse import urlparse
+from pathlib import Path
+from string import Template
+
+logger = logging.getLogger(__name__)
+
+
+class ConfigData(BaseModel):
+ """Configuration data model."""
+
+ port: PositiveInt
+ site_url: Optional[str]
+ max_file_size: Optional[conint(ge=0)]
+ ingress_whitelist_source_range: Optional[IPvAnyNetwork]
+ tls_secret_name: Optional[str]
+
+ @validator("max_file_size", pre=True, always=True)
+ def validate_max_file_size(cls, value, values, **kwargs):
+ site_url = values.get("site_url")
+
+ if not site_url:
+ return value
+
+ parsed = urlparse(site_url)
+
+ if not parsed.scheme.startswith("http"):
+ return value
+
+ if value is None:
+ raise ValueError("max_file_size needs to be defined if site_url is defined")
+
+ return value
+
+ @validator("ingress_whitelist_source_range", pre=True, always=True)
+ def validate_ingress_whitelist_source_range(cls, value, values, **kwargs):
+ if not value:
+ return None
+
+ return value
+
+
+class RelationData(BaseModel):
+ """Relation data model."""
+
+ nbi_host: str
+ nbi_port: PositiveInt
+
+
+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": "http", "containerPort": port, "protocol": "TCP"},
+ ]
+
+
+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
+
+ max_file_size = config["max_file_size"]
+ ingress_whitelist_source_range = config["ingress_whitelist_source_range"]
+
+ annotations = {
+ "nginx.ingress.kubernetes.io/proxy-body-size": "{}".format(
+ str(max_file_size) + "m" if max_file_size > 0 else max_file_size
+ ),
+ }
+
+ 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_startup_probe() -> Dict[str, Any]:
+ """Generate startup probe.
+
+ Returns:
+ Dict[str, Any]: startup probe.
+ """
+ return {
+ "exec": {"command": ["/usr/bin/pgrep python3"]},
+ "initialDelaySeconds": 60,
+ "timeoutSeconds": 5,
+ }
+
+
+def _make_readiness_probe(port: int) -> Dict[str, Any]:
+ """Generate readiness probe.
+
+ Args:
+ port (int): [description]
+
+ Returns:
+ Dict[str, Any]: readiness probe.
+ """
+ return {
+ "tcpSocket": {
+ "port": port,
+ },
+ "initialDelaySeconds": 45,
+ "timeoutSeconds": 5,
+ }
+
+
+def _make_liveness_probe(port: int) -> Dict[str, Any]:
+ """Generate liveness probe.
+
+ Args:
+ port (int): [description]
+
+ Returns:
+ Dict[str, Any]: liveness probe.
+ """
+ return {
+ "tcpSocket": {
+ "port": port,
+ },
+ "initialDelaySeconds": 45,
+ "timeoutSeconds": 5,
+ }
+
+
+def _make_pod_volume_config(
+ config: Dict[str, Any],
+ relation_state: Dict[str, Any],
+) -> List[Dict[str, Any]]:
+ """Generate volume config with files.
+
+ Args:
+ config (Dict[str, Any]): configuration information.
+
+ Returns:
+ Dict[str, Any]: volume config.
+ """
+ template_data = {**config, **relation_state}
+ template_data["max_file_size"] = f'{template_data["max_file_size"]}M'
+ return [
+ {
+ "name": "configuration",
+ "mountPath": "/etc/nginx/sites-available/",
+ "files": [
+ {
+ "path": "default",
+ "content": Template(Path("files/default").read_text()).substitute(
+ template_data
+ ),
+ }
+ ],
+ }
+ ]
+
+
+def make_pod_spec(
+ image_info: Dict[str, str],
+ config: Dict[str, Any],
+ relation_state: Dict[str, Any],
+ app_name: str = "ng-ui",
+) -> 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 "ng-ui".
+ port (int, optional): Port for the container. Defaults to 80.
+
+ Returns:
+ Dict[str, Any]: Pod spec dictionary for the charm.
+ """
+ if not image_info:
+ return None
+
+ ConfigData(**(config))
+ RelationData(**(relation_state))
+
+ ports = _make_pod_ports(config["port"])
+ ingress_resources = _make_pod_ingress_resources(config, app_name, config["port"])
+ kubernetes = {
+ # "startupProbe": _make_startup_probe(),
+ "readinessProbe": _make_readiness_probe(config["port"]),
+ "livenessProbe": _make_liveness_probe(config["port"]),
+ }
+ volume_config = _make_pod_volume_config(config, relation_state)
+ return {
+ "version": 3,
+ "containers": [
+ {
+ "name": app_name,
+ "imageDetails": image_info,
+ "imagePullPolicy": "Always",
+ "ports": ports,
+ "kubernetes": kubernetes,
+ "volumeConfig": volume_config,
+ }
+ ],
+ "kubernetesResources": {
+ "ingressResources": ingress_resources or [],
+ },
+ }
projects / osm / devops.git / blobdiff