# Copyright © 2023 Vulcanize # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Affero General Public License for more details. # You should have received a copy of the GNU Affero General Public License # along with this program. If not, see . from kubernetes import client import os from pathlib import Path import subprocess from typing import Set, Mapping, List from stack_orchestrator.opts import opts from stack_orchestrator.deploy.deploy_util import parsed_pod_files_map_from_file_names def _run_command(command: str): if opts.o.debug: print(f"Running: {command}") result = subprocess.run(command, shell=True) if opts.o.debug: print(f"Result: {result}") def create_cluster(name: str, config_file: str): _run_command(f"kind create cluster --name {name} --config {config_file}") def destroy_cluster(name: str): _run_command(f"kind delete cluster --name {name}") def load_images_into_kind(kind_cluster_name: str, image_set: Set[str]): for image in image_set: _run_command(f"kind load docker-image {image} --name {kind_cluster_name}") def pods_in_deployment(core_api: client.CoreV1Api, deployment_name: str): pods = [] pod_response = core_api.list_namespaced_pod(namespace="default", label_selector="app=test-app") if opts.o.debug: print(f"pod_response: {pod_response}") for pod_info in pod_response.items: pod_name = pod_info.metadata.name pods.append(pod_name) return pods def log_stream_from_string(s: str): # Note response has to be UTF-8 encoded because the caller expects to decode it yield ("ignore", s.encode()) def named_volumes_from_pod_files(parsed_pod_files): # Parse the compose files looking for named volumes named_volumes = [] for pod in parsed_pod_files: parsed_pod_file = parsed_pod_files[pod] if "volumes" in parsed_pod_file: volumes = parsed_pod_file["volumes"] for volume in volumes.keys(): # Volume definition looks like: # 'laconicd-data': None named_volumes.append(volume) return named_volumes def get_node_pv_mount_path(volume_name: str): return f"/mnt/{volume_name}" def volume_mounts_for_service(parsed_pod_files, service): result = [] # Find the service for pod in parsed_pod_files: parsed_pod_file = parsed_pod_files[pod] if "services" in parsed_pod_file: services = parsed_pod_file["services"] for service_name in services: if service_name == service: service_obj = services[service_name] if "volumes" in service_obj: volumes = service_obj["volumes"] for mount_string in volumes: # Looks like: test-data:/data (volume_name, mount_path) = mount_string.split(":") volume_device = client.V1VolumeMount(mount_path=mount_path, name=volume_name) result.append(volume_device) return result def volumes_for_pod_files(parsed_pod_files): result = [] for pod in parsed_pod_files: parsed_pod_file = parsed_pod_files[pod] if "volumes" in parsed_pod_file: volumes = parsed_pod_file["volumes"] for volume_name in volumes.keys(): claim = client.V1PersistentVolumeClaimVolumeSource(claim_name=volume_name) volume = client.V1Volume(name=volume_name, persistent_volume_claim=claim) result.append(volume) return result def _get_host_paths_for_volumes(parsed_pod_files): result = {} for pod in parsed_pod_files: parsed_pod_file = parsed_pod_files[pod] if "volumes" in parsed_pod_file: volumes = parsed_pod_file["volumes"] for volume_name in volumes.keys(): volume_definition = volumes[volume_name] host_path = volume_definition["driver_opts"]["device"] result[volume_name] = host_path return result def _make_absolute_host_path(data_mount_path: Path, deployment_dir: Path) -> Path: if os.path.isabs(data_mount_path): return data_mount_path else: # Python Path voodo that looks pretty odd: return Path.cwd().joinpath(deployment_dir.joinpath("compose").joinpath(data_mount_path)).resolve() def _generate_kind_mounts(parsed_pod_files, deployment_dir): volume_definitions = [] volume_host_path_map = _get_host_paths_for_volumes(parsed_pod_files) # Note these paths are relative to the location of the pod files (at present) # So we need to fix up to make them correct and absolute because kind assumes # relative to the cwd. for pod in parsed_pod_files: parsed_pod_file = parsed_pod_files[pod] if "services" in parsed_pod_file: services = parsed_pod_file["services"] for service_name in services: service_obj = services[service_name] if "volumes" in service_obj: volumes = service_obj["volumes"] for mount_string in volumes: # Looks like: test-data:/data (volume_name, mount_path) = mount_string.split(":") volume_definitions.append( f" - hostPath: {_make_absolute_host_path(volume_host_path_map[volume_name], deployment_dir)}\n" f" containerPath: {get_node_pv_mount_path(volume_name)}" ) return ( "" if len(volume_definitions) == 0 else ( " extraMounts:\n" f"{''.join(volume_definitions)}" ) ) def _generate_kind_port_mappings(parsed_pod_files): port_definitions = [] for pod in parsed_pod_files: parsed_pod_file = parsed_pod_files[pod] if "services" in parsed_pod_file: services = parsed_pod_file["services"] for service_name in services: service_obj = services[service_name] if "ports" in service_obj: ports = service_obj["ports"] for port_string in ports: # TODO handle the complex cases # Looks like: 80 or something more complicated port_definitions.append(f" - containerPort: {port_string}\n hostPort: {port_string}") return ( "" if len(port_definitions) == 0 else ( " extraPortMappings:\n" f"{''.join(port_definitions)}" ) ) def envs_from_environment_variables_map(map: Mapping[str, str]) -> List[client.V1EnvVar]: result = [] for env_var, env_val in map.items(): result.append(client.V1EnvVar(env_var, env_val)) return result # This needs to know: # The service ports for the cluster # The bind mounted volumes for the cluster # # Make ports like this: # extraPortMappings: # - containerPort: 80 # hostPort: 80 # # optional: set the bind address on the host # # 0.0.0.0 is the current default # listenAddress: "127.0.0.1" # # optional: set the protocol to one of TCP, UDP, SCTP. # # TCP is the default # protocol: TCP # Make bind mounts like this: # extraMounts: # - hostPath: /path/to/my/files # containerPath: /files def generate_kind_config(deployment_dir: Path): compose_file_dir = deployment_dir.joinpath("compose") # TODO: this should come from the stack file, not this way pod_files = [p for p in compose_file_dir.iterdir() if p.is_file()] parsed_pod_files_map = parsed_pod_files_map_from_file_names(pod_files) port_mappings_yml = _generate_kind_port_mappings(parsed_pod_files_map) mounts_yml = _generate_kind_mounts(parsed_pod_files_map, deployment_dir) return ( "kind: Cluster\n" "apiVersion: kind.x-k8s.io/v1alpha4\n" "nodes:\n" "- role: control-plane\n" f"{port_mappings_yml}\n" f"{mounts_yml}\n" )