mirror of
https://github.com/balena-os/balena-supervisor.git
synced 2024-12-30 18:47:00 +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';
|
|
import * as _ from 'lodash';
|
|
|
|
export async function setupLogs(
|
|
docker: Docker,
|
|
containerId: string,
|
|
lastReadTimestamp = 0,
|
|
) {
|
|
const container = docker.getContainer(containerId);
|
|
|
|
const stream = await container.logs({
|
|
stdout: true,
|
|
stderr: true,
|
|
follow: true,
|
|
timestamps: true,
|
|
since: lastReadTimestamp,
|
|
});
|
|
|
|
stream.on('data', chunk => {
|
|
const { message, timestamp } = extractMessage(chunk);
|
|
// Add one here, other we can end up constantly reading
|
|
// the same log line
|
|
lastReadTimestamp = Math.floor(timestamp.getTime() / 1000) + 1;
|
|
process.stdout.write(message);
|
|
});
|
|
|
|
// This happens when a container is restarted
|
|
stream.on('end', () => {
|
|
setupLogs(docker, containerId, lastReadTimestamp);
|
|
});
|
|
}
|
|
|
|
function extractMessage(msgBuf: Buffer) {
|
|
// Non-tty message format from:
|
|
// https://docs.docker.com/engine/api/v1.30/#operation/ContainerAttach
|
|
if ([0, 1, 2].includes(msgBuf[0])) {
|
|
// Take the header from this message, and parse it as normal
|
|
msgBuf = msgBuf.slice(8);
|
|
}
|
|
const str = msgBuf.toString();
|
|
const space = str.indexOf(' ');
|
|
return {
|
|
timestamp: new Date(str.slice(0, space)),
|
|
message: str.slice(space + 1),
|
|
};
|
|
}
|