Stash logs in crash log directory

src/crashnotifier.js

@@ -0,0 +1,61 @@
+'use strict';
+
+exports = module.exports = {
+    sendFailureLogs: sendFailureLogs
+};
+
+var assert = require('assert'),
+    eventlog = require('./eventlog.js'),
+    safe = require('safetydance'),
+    path = require('path'),
+    paths = require('./paths.js'),
+    util = require('util');
+
+const COLLECT_LOGS_CMD = path.join(__dirname, 'scripts/collectlogs.sh');
+
+const CRASH_LOG_TIMESTAMP_OFFSET = 1000 * 60 * 60; // 60 min
+const CRASH_LOG_TIMESTAMP_FILE = '/tmp/crashlog.timestamp';
+
+const AUDIT_SOURCE = { userId: null, username: 'healthmonitor' };
+
+function collectLogs(unitName, callback) {
+    assert.strictEqual(typeof unitName, 'string');
+    assert.strictEqual(typeof callback, 'function');
+
+    var logs = safe.child_process.execSync('sudo ' + COLLECT_LOGS_CMD + ' ' + unitName, { encoding: 'utf8' });
+    if (!logs) return callback(safe.error);
+
+    callback(null, logs);
+}
+
+function sendFailureLogs(unitName, callback) {
+    assert.strictEqual(typeof unitName, 'string');
+    assert.strictEqual(typeof callback, 'function');
+
+    // check if we already sent a mail in the last CRASH_LOG_TIME_OFFSET window
+    const timestamp = safe.fs.readFileSync(CRASH_LOG_TIMESTAMP_FILE, 'utf8');
+    if (timestamp && (parseInt(timestamp) + CRASH_LOG_TIMESTAMP_OFFSET) > Date.now()) {
+        console.log('Crash log already sent within window');
+        return callback();
+    }
+
+    collectLogs(unitName, function (error, logs) {
+        if (error) {
+            console.error('Failed to collect logs.', error);
+            logs = util.format('Failed to collect logs.', error);
+        }
+
+        const crashLogFile = `${new Date().toISOString()}.log`;
+        console.log(`Sending failure logs for ${unitName} at ${crashLogFile}`);
+
+        if (!safe.fs.writeFileSync(path.join(paths.CRASH_LOG_DIR, crashLogFile), logs)) console.log(`Failed to stash logs to ${crashLogFile}:`, safe.error);
+
+        eventlog.add(eventlog.ACTION_PROCESS_CRASH, AUDIT_SOURCE, { processName: unitName, crashLogFile: crashLogFile }, function (error) {
+            if (error) console.log(`Error sending crashlog. Logs stashed at ${crashLogFile}`);
+
+            safe.fs.writeFileSync(CRASH_LOG_TIMESTAMP_FILE, String(Date.now()));
+
+            callback();
+        });
+    });
+}