sd-notify.js
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/* eslint-disable global-require */
/* eslint-disable import/no-extraneous-dependencies */
const MODULE_NAME = 'KOMODO-SDK.SD-NOTIFY';
const USE_SYSTEMD_NOTIFY_PACKAGE = false;
const USE_SYSTEMD_NOTIFY_BIN = false;
const util = require('util');
const logger = require('tektrans-logger');
const matrix = require('./matrix');
const exec = util.promisify(require('child_process').exec);
const notifyUseSystemdNotify = async (statusMsg) => {
try {
const notify = require('systemd-notify');
const status = statusMsg || 'Ready to go';
logger.verbose(`${MODULE_NAME} 3B8DF3BC: Trying to notify systemd using systemd-notify package`, { status });
await notify({
ready: true,
status,
// pid: process.pid,
});
logger.info(`${MODULE_NAME} B905A857: Systemd ready notification has been sent using systemd-notify package`);
return true;
} catch (e) {
logger.verbose(`${MODULE_NAME} 488B3245: Failed to notify using systemd-notify package`, {
why: e.message || e.toString(),
});
return false;
}
};
const notifyUseSdNotify = () => {
try {
const sdNotify = require('sd-notify');
logger.verbose(`${MODULE_NAME} A200BF49: Trying to notify systemd using sd-notify package`);
sdNotify.ready();
matrix.systemd_notified = new Date();
logger.info(`${MODULE_NAME} 701F8400: Systemd ready notification has been sent using sd-notify package`);
return true;
} catch (e) {
logger.warn(`${MODULE_NAME} A6C99938: Optional dependency not found: sd-notify`);
return false;
}
};
const notifyUseBin = async () => {
try {
logger.verbose(`${MODULE_NAME} FFBCF4E3: Trying to notify systemd using systemd-notify bin`);
await exec('systemd-notify --ready');
logger.info(`${MODULE_NAME} B58921FF: Systemd ready notification has been sent using systemd-notify bin`);
return true;
} catch (e) {
logger.verbose(`${MODULE_NAME} 75237B65: Failed to notify using systemd-notify bin`, {
eCode: e.code,
eMessage: e.message || e.toString(),
});
return false;
}
};
/**
*
* @param {string} statusMsg
* @returns
*/
module.exports = async (statusMsg) => {
const { ppid } = process;
if (ppid !== 1) {
logger.verbose(`${MODULE_NAME} 74A5B2AF: No need to notify systemd`, { ppid });
return;
}
if (USE_SYSTEMD_NOTIFY_PACKAGE) {
const successOnUsingSystemdNotify = await notifyUseSystemdNotify(statusMsg);
if (successOnUsingSystemdNotify) {
return;
}
}
if (USE_SYSTEMD_NOTIFY_BIN) {
const successOnUsingBin = await notifyUseBin();
if (successOnUsingBin) {
return;
}
}
notifyUseSdNotify();
};