mirror of
https://github.com/balena-io/balena-cli.git
synced 2024-12-19 13:47:52 +00:00
427 lines
12 KiB
TypeScript
427 lines
12 KiB
TypeScript
import * as Bluebird from 'bluebird';
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import * as chokidar from 'chokidar';
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import * as Dockerode from 'dockerode';
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import Livepush, {
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ContainerNotRunningError,
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LivepushAlreadyRunningError,
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} from 'livepush';
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import * as _ from 'lodash';
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import * as path from 'path';
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import { Composition } from 'resin-compose-parse';
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import { BuildTask } from 'resin-multibuild';
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import Logger = require('../logger');
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import DeviceAPI, { DeviceInfo, Status } from './api';
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import {
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DeviceDeployOptions,
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generateTargetState,
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rebuildSingleTask,
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} from './deploy';
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import { BuildError } from './errors';
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import { getServiceColourFn } from './logs';
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// How often do we want to check the device state
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// engine has settled (delay in ms)
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const DEVICE_STATUS_SETTLE_CHECK_INTERVAL = 1000;
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const LIVEPUSH_DEBOUNCE_TIMEOUT = 2000;
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interface MonitoredContainer {
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context: string;
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livepush: Livepush;
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monitor: chokidar.FSWatcher;
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containerId: string;
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}
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type BuildLogs = Dictionary<string>;
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type StageImageIDs = Dictionary<string[]>;
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export interface LivepushOpts {
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buildContext: string;
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composition: Composition;
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buildTasks: BuildTask[];
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docker: Dockerode;
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api: DeviceAPI;
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logger: Logger;
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buildLogs: BuildLogs;
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deployOpts: DeviceDeployOptions;
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}
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export class LivepushManager {
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private lastDeviceStatus: Status | null = null;
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private containers: Dictionary<MonitoredContainer> = {};
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private dockerfilePaths: Dictionary<string[]> = {};
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private deviceInfo: DeviceInfo;
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private deployOpts: DeviceDeployOptions;
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private buildContext: string;
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private composition: Composition;
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private buildTasks: BuildTask[];
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private docker: Dockerode;
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private api: DeviceAPI;
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private logger: Logger;
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private imageIds: StageImageIDs;
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// A map of service names to events waiting
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private updateEventsWaiting: Dictionary<string[]> = {};
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private deleteEventsWaiting: Dictionary<string[]> = {};
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public constructor(opts: LivepushOpts) {
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this.buildContext = opts.buildContext;
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this.composition = opts.composition;
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this.buildTasks = opts.buildTasks;
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this.docker = opts.docker;
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this.api = opts.api;
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this.logger = opts.logger;
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this.deployOpts = opts.deployOpts;
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this.imageIds = LivepushManager.getMultistageImageIDs(opts.buildLogs);
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}
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public async init(): Promise<void> {
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this.deviceInfo = await this.api.getDeviceInformation();
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this.logger.logLivepush('Waiting for device state to settle...');
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// The first thing we need to do is let the state 'settle',
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// so that all of the containers are running and ready to
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// be livepush'd into
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await this.awaitDeviceStateSettle();
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// Split the composition into a load of differents paths
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// which we can
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this.logger.logLivepush('Device state settled');
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// create livepush instances for
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for (const serviceName of _.keys(this.composition.services)) {
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const service = this.composition.services[serviceName];
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const buildTask = _.find(this.buildTasks, { serviceName });
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if (buildTask == null) {
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throw new Error(
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`Could not find a build task for service: ${serviceName}`,
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);
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}
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// We only care about builds
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if (service.build != null) {
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const context = path.join(this.buildContext, service.build.context);
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const dockerfile = buildTask.dockerfile;
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if (dockerfile == null) {
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throw new Error(
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`Could not detect dockerfile for service: ${serviceName}`,
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);
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}
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if (buildTask.dockerfilePath == null) {
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// this is a bit of a hack as resin-bundle-resolve
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// does not always export the dockerfilePath, this
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// only happens when the dockerfile path is
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// specified differently - this should be patched
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// in resin-bundle-resolve
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this.dockerfilePaths[
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buildTask.serviceName
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] = this.getDockerfilePathFromTask(buildTask);
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} else {
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this.dockerfilePaths[buildTask.serviceName] = [
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buildTask.dockerfilePath,
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];
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}
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// Find the containerId from the device state
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const container = _.find(this.lastDeviceStatus!.containers, {
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serviceName,
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});
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if (container == null) {
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throw new Error(
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`Could not find a container on device for service: ${serviceName}`,
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);
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}
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const msgString = (msg: string) =>
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`[${getServiceColourFn(serviceName)(serviceName)}] ${msg}`;
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const log = (msg: string) => this.logger.logLivepush(msgString(msg));
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const error = (msg: string) => this.logger.logError(msgString(msg));
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const debugLog = (msg: string) => this.logger.logDebug(msgString(msg));
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const livepush = await Livepush.init(
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dockerfile,
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context,
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container.containerId,
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this.imageIds[serviceName],
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this.docker,
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);
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livepush.on('commandExecute', command =>
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log(`Executing command: \`${command.command}\``),
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);
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livepush.on('commandOutput', output =>
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log(` ${output.output.data.toString()}`),
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);
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livepush.on('commandReturn', ({ returnCode, command }) => {
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if (returnCode !== 0) {
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error(` Command ${command} failed with exit code: ${returnCode}`);
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} else {
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debugLog(`Command ${command} exited successfully`);
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}
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});
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livepush.on('containerRestart', () => {
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log('Restarting service...');
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});
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this.updateEventsWaiting[serviceName] = [];
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this.deleteEventsWaiting[serviceName] = [];
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const addEvent = (eventQueue: string[], changedPath: string) => {
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this.logger.logDebug(
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`Got an add filesystem event for service: ${serviceName}. File: ${changedPath}`,
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);
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eventQueue.push(changedPath);
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this.getDebouncedEventHandler(serviceName)();
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};
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// TODO: Memoize this for containers which share a context
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const monitor = chokidar.watch('.', {
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cwd: context,
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ignoreInitial: true,
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});
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monitor.on('add', (changedPath: string) =>
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addEvent(this.updateEventsWaiting[serviceName], changedPath),
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);
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monitor.on('change', (changedPath: string) =>
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addEvent(this.updateEventsWaiting[serviceName], changedPath),
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);
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monitor.on('unlink', (changedPath: string) =>
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addEvent(this.deleteEventsWaiting[serviceName], changedPath),
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);
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this.containers[serviceName] = {
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livepush,
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context,
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monitor,
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containerId: container.containerId,
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};
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}
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}
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// Setup cleanup handlers for the device
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// This is necessary because the `exit-hook` module is used by several
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// dependencies, and will exit without calling the following handler.
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// Once https://github.com/balena-io/balena-cli/issues/867 has been solved,
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// we are free to (and definitely should) remove the below line
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process.removeAllListeners('SIGINT');
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process.on('SIGINT', async () => {
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this.logger.logLivepush('Cleaning up device...');
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await Promise.all(
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_.map(this.containers, container => {
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container.livepush.cleanupIntermediateContainers();
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}),
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);
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process.exit(0);
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});
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}
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private static getMultistageImageIDs(buildLogs: BuildLogs): StageImageIDs {
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const stageIds: StageImageIDs = {};
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_.each(buildLogs, (log, serviceName) => {
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stageIds[serviceName] = [];
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const lines = log.split(/\r?\n/);
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let lastArrowMessage: string | undefined;
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for (const line of lines) {
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// If this was a from line, take the last found
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// image id and save it
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if (
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/step \d+(?:\/\d+)?\s*:\s*FROM/i.test(line) &&
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lastArrowMessage != null
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) {
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stageIds[serviceName].push(lastArrowMessage);
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} else {
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const msg = LivepushManager.extractDockerArrowMessage(line);
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if (msg != null) {
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lastArrowMessage = msg;
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}
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}
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}
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});
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return stageIds;
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}
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private async awaitDeviceStateSettle(): Promise<void> {
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// Cache the state to avoid unnecessary cals
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this.lastDeviceStatus = await this.api.getStatus();
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if (this.lastDeviceStatus.appState === 'applied') {
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return;
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}
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this.logger.logDebug(
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`Device state not settled, retrying in ${DEVICE_STATUS_SETTLE_CHECK_INTERVAL}ms`,
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);
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await Bluebird.delay(DEVICE_STATUS_SETTLE_CHECK_INTERVAL);
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await this.awaitDeviceStateSettle();
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}
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private async handleFSEvents(serviceName: string): Promise<void> {
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const updated = this.updateEventsWaiting[serviceName];
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const deleted = this.deleteEventsWaiting[serviceName];
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this.updateEventsWaiting[serviceName] = [];
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this.deleteEventsWaiting[serviceName] = [];
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// First we detect if the file changed is the Dockerfile
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// used to build the service
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if (
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_.some(this.dockerfilePaths[serviceName], name =>
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_.some(updated, changed => name === changed),
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)
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) {
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this.logger.logLivepush(
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`Detected Dockerfile change, performing full rebuild of service ${serviceName}`,
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);
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await this.handleServiceRebuild(serviceName);
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return;
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}
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// Work out if we need to perform any changes on this container
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const livepush = this.containers[serviceName].livepush;
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this.logger.logLivepush(
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`Detected changes for container ${serviceName}, updating...`,
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);
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try {
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await livepush.performLivepush(updated, deleted);
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} catch (e) {
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this.logger.logError(
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`An error occured whilst trying to perform a livepush: `,
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);
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if (e instanceof LivepushAlreadyRunningError) {
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this.logger.logError(' Livepush already running');
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} else if (e instanceof ContainerNotRunningError) {
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this.logger.logError(' Livepush container not running');
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} else {
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this.logger.logError(` ${e.message}`);
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}
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this.logger.logDebug(e.stack);
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}
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}
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private async handleServiceRebuild(serviceName: string): Promise<void> {
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try {
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const buildTask = _.find(this.buildTasks, { serviceName });
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if (buildTask == null) {
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throw new Error(
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`Could not find a build task for service ${serviceName}`,
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);
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}
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let buildLog: string;
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try {
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buildLog = await rebuildSingleTask(
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serviceName,
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this.docker,
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this.logger,
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this.deviceInfo,
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this.composition,
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this.buildContext,
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this.deployOpts,
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);
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} catch (e) {
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if (!(e instanceof BuildError)) {
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throw e;
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}
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this.logger.logError(
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`Rebuild of service ${serviceName} failed!\n Error: ${e.getServiceError(
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serviceName,
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)}`,
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);
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return;
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}
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// TODO: The code below is quite roundabout, and instead
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// we'd prefer just to call a supervisor endpoint which
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// recreates a container, but that doesn't exist yet
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// First we request the current target state
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const currentState = await this.api.getTargetState();
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// Then we generate a target state without the service
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// we rebuilt
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const comp = _.cloneDeep(this.composition);
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delete comp.services[serviceName];
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const intermediateState = generateTargetState(currentState, comp);
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await this.api.setTargetState(intermediateState);
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// Now we wait for the device state to settle
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await this.awaitDeviceStateSettle();
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// And re-set the target state
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await this.api.setTargetState(
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generateTargetState(currentState, this.composition),
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);
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await this.awaitDeviceStateSettle();
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const instance = this.containers[serviceName];
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// Get the new container
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const container = _.find(this.lastDeviceStatus!.containers, {
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serviceName,
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});
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if (container == null) {
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throw new Error(
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`Could not find new container for service ${serviceName}`,
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);
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}
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const buildLogs: Dictionary<string> = {};
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buildLogs[serviceName] = buildLog;
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const stageImages = LivepushManager.getMultistageImageIDs(buildLogs);
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instance.livepush = await Livepush.init(
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buildTask.dockerfile!,
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buildTask.context!,
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container.containerId,
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stageImages[serviceName],
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this.docker,
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);
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} catch (e) {
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this.logger.logError(`There was an error rebuilding the service: ${e}`);
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}
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}
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private static extractDockerArrowMessage(
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outputLine: string,
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): string | undefined {
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const arrowTest = /^.*\s*-+>\s*(.+)/i;
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const match = arrowTest.exec(outputLine);
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if (match != null) {
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return match[1];
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}
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}
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private getDockerfilePathFromTask(task: BuildTask): string[] {
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switch (task.projectType) {
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case 'Standard Dockerfile':
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return ['Dockerfile'];
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case 'Dockerfile.template':
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return ['Dockerfile.template'];
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case 'Architecture-specific Dockerfile':
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return [
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`Dockerfile.${this.deviceInfo.arch}`,
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`Dockerfile.${this.deviceInfo.deviceType}`,
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];
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default:
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return [];
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}
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}
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// For each service, get a debounced function
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private getDebouncedEventHandler = _.memoize((serviceName: string) => {
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return _.debounce(
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() => this.handleFSEvents(serviceName),
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LIVEPUSH_DEBOUNCE_TIMEOUT,
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);
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});
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}
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export default LivepushManager;
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