mirror of
https://github.com/balena-os/balena-supervisor.git
synced 2024-12-19 05:37:53 +00:00
8ab63656bd
We move the old sync.js script to tools/, and delete the now-broken sync-debug.js. We add a command `npm run sync`, which starts a livepush process with the supervisor on a device. Change-type: minor Signed-off-by: Cameron Diver <cameron@balena.io>
47 lines
1.2 KiB
TypeScript
47 lines
1.2 KiB
TypeScript
import * as Docker from 'dockerode';
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import * as _ from 'lodash';
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export async function setupLogs(
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docker: Docker,
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containerId: string,
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lastReadTimestamp = 0,
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) {
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const container = docker.getContainer(containerId);
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const stream = await container.logs({
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stdout: true,
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stderr: true,
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follow: true,
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timestamps: true,
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since: lastReadTimestamp,
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});
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stream.on('data', chunk => {
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const { message, timestamp } = extractMessage(chunk);
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// Add one here, other we can end up constantly reading
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// the same log line
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lastReadTimestamp = Math.floor(timestamp.getTime() / 1000) + 1;
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process.stdout.write(message);
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});
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// This happens when a container is restarted
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stream.on('end', () => {
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setupLogs(docker, containerId, lastReadTimestamp);
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});
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}
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function extractMessage(msgBuf: Buffer) {
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// Non-tty message format from:
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// https://docs.docker.com/engine/api/v1.30/#operation/ContainerAttach
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if ([0, 1, 2].includes(msgBuf[0])) {
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// Take the header from this message, and parse it as normal
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msgBuf = msgBuf.slice(8);
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}
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const str = msgBuf.toString();
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const space = str.indexOf(' ');
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return {
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timestamp: new Date(str.slice(0, space)),
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message: str.slice(space + 1),
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};
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}
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