MediaWiki API result
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{
"compare": {
"fromid": 1,
"fromrevid": 1,
"fromns": 0,
"fromtitle": "Main Page",
"toid": 2,
"torevid": 2,
"tons": 0,
"totitle": "Cust1",
"*": "<tr><td colspan=\"2\" class=\"diff-lineno\" id=\"mw-diff-left-l1\">Line 1:</td>\n<td colspan=\"2\" class=\"diff-lineno\">Line 1:</td></tr>\n<tr><td class=\"diff-marker\" data-marker=\"\u2212\"></td><td class=\"diff-deletedline diff-side-deleted\"><div><<del class=\"diffchange diffchange-inline\">strong</del>><del class=\"diffchange diffchange-inline\">MediaWiki has been installed.</del></<del class=\"diffchange diffchange-inline\">strong</del>></div></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">Customer 1 runs a small web platform on two hosts: the web host </ins><<ins class=\"diffchange diffchange-inline\">code</ins>><ins class=\"diffchange diffchange-inline\">cust1</code> and the database host <code>db1</ins></<ins class=\"diffchange diffchange-inline\">code</ins>><ins class=\"diffchange diffchange-inline\">.</ins></div></td></tr>\n<tr><td class=\"diff-marker\"></td><td class=\"diff-context diff-side-deleted\"><br></td><td class=\"diff-marker\"></td><td class=\"diff-context diff-side-added\"><br></td></tr>\n<tr><td class=\"diff-marker\" data-marker=\"\u2212\"></td><td class=\"diff-deletedline diff-side-deleted\"><div><del class=\"diffchange diffchange-inline\">Consult the [https:</del>//<del class=\"diffchange diffchange-inline\">www</del>.<del class=\"diffchange diffchange-inline\">mediawiki</del>.<del class=\"diffchange diffchange-inline\">org</del>/<del class=\"diffchange diffchange-inline\">wiki</del>/<del class=\"diffchange diffchange-inline\">Special:MyLanguage</del>/<del class=\"diffchange diffchange-inline\">Help:Contents User's Guide</del>] <del class=\"diffchange diffchange-inline\">for information on using the wiki software.</del></div></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">== Hosts ==</ins></div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">{| class=\"wikitable\"</ins></div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">! Host !! Role !! Agent access</ins></div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">|-</ins></div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">| cust1.gobyl.cc || Website and application || ssh as root, key in OpenBao at <code>secret/customers</ins>/<ins class=\"diffchange diffchange-inline\">cust1<</ins>/<ins class=\"diffchange diffchange-inline\">code></ins></div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">|-</ins></div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">| db1</ins>.<ins class=\"diffchange diffchange-inline\">gobyl</ins>.<ins class=\"diffchange diffchange-inline\">cc || PostgreSQL database || '''Read-only''': ssh as <code>dbops<</ins>/<ins class=\"diffchange diffchange-inline\">code> (no sudo), key at <code>secret</ins>/<ins class=\"diffchange diffchange-inline\">customers/cust1-db<</ins>/<ins class=\"diffchange diffchange-inline\">code>. See [[Db1]</ins>]</div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">|}</ins></div></td></tr>\n<tr><td class=\"diff-marker\"></td><td class=\"diff-context diff-side-deleted\"><br></td><td class=\"diff-marker\"></td><td class=\"diff-context diff-side-added\"><br></td></tr>\n<tr><td class=\"diff-marker\" data-marker=\"\u2212\"></td><td class=\"diff-deletedline diff-side-deleted\"><div>== <del class=\"diffchange diffchange-inline\">Getting started </del>==</div></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div>== <ins class=\"diffchange diffchange-inline\">Services on cust1 =</ins>=</div></td></tr>\n<tr><td class=\"diff-marker\" data-marker=\"\u2212\"></td><td class=\"diff-deletedline diff-side-deleted\"><div><del class=\"diffchange diffchange-inline\">* [https:</del>//www.<del class=\"diffchange diffchange-inline\">mediawiki.org</del>/<del class=\"diffchange diffchange-inline\">wiki</del>/<del class=\"diffchange diffchange-inline\">Special:MyLanguage</del>/<del class=\"diffchange diffchange-inline\">Manual:Configuration_settings Configuration settings list]</del></div></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">{| class</ins>=<ins class=\"diffchange diffchange-inline\">\"wikitable\"</ins></div></td></tr>\n<tr><td class=\"diff-marker\" data-marker=\"\u2212\"></td><td class=\"diff-deletedline diff-side-deleted\"><div><del class=\"diffchange diffchange-inline\">* [https</del>://<del class=\"diffchange diffchange-inline\">www</del>.<del class=\"diffchange diffchange-inline\">mediawiki.org</del>/<del class=\"diffchange diffchange-inline\">wiki</del>/<del class=\"diffchange diffchange-inline\">Special:MyLanguage</del>/<del class=\"diffchange diffchange-inline\">Manual:FAQ MediaWiki FAQ]</del></div></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">! Service !! How it runs !! Port !! Notes</ins></div></td></tr>\n<tr><td class=\"diff-marker\" data-marker=\"\u2212\"></td><td class=\"diff-deletedline diff-side-deleted\"><div>* <del class=\"diffchange diffchange-inline\">[https</del>:/<del class=\"diffchange diffchange-inline\">/lists.wikimedia</del>.<del class=\"diffchange diffchange-inline\">org</del>/<del class=\"diffchange diffchange-inline\">postorius</del>/<del class=\"diffchange diffchange-inline\">lists</del>/<del class=\"diffchange diffchange-inline\">mediawiki-announce</del>.<del class=\"diffchange diffchange-inline\">lists</del>.<del class=\"diffchange diffchange-inline\">wikimedia</del>.<del class=\"diffchange diffchange-inline\">org/ MediaWiki release mailing list]</del></div></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">|-</ins></div></td></tr>\n<tr><td class=\"diff-marker\" data-marker=\"\u2212\"></td><td class=\"diff-deletedline diff-side-deleted\"><div>* <del class=\"diffchange diffchange-inline\">[https</del>://<del class=\"diffchange diffchange-inline\">www</del>.<del class=\"diffchange diffchange-inline\">mediawiki.org</del>/<del class=\"diffchange diffchange-inline\">wiki</del>/<del class=\"diffchange diffchange-inline\">Special:MyLanguage</del>/<del class=\"diffchange diffchange-inline\">Localisation#Translation_resources Localise MediaWiki for your language]</del></div></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">| Website || nginx, static files in </ins>/<ins class=\"diffchange diffchange-inline\">var</ins>/www<ins class=\"diffchange diffchange-inline\">/html || 80 || Public trading dashboard with a live platform-telemetry graph</ins>. <ins class=\"diffchange diffchange-inline\">Market data and the telemetry traces are generated in the browser, so the page renders with the application down and the graph is not a measurement of the host</ins></div></td></tr>\n<tr><td class=\"diff-marker\" data-marker=\"\u2212\"></td><td class=\"diff-deletedline diff-side-deleted\"><div>* <del class=\"diffchange diffchange-inline\">[https</del>:<del class=\"diffchange diffchange-inline\">//www</del>.<del class=\"diffchange diffchange-inline\">mediawiki</del>.<del class=\"diffchange diffchange-inline\">org/wiki/Special:MyLanguage/Manual:Combating_spam Learn how </del>to <del class=\"diffchange diffchange-inline\">combat spam </del>on <del class=\"diffchange diffchange-inline\">your wiki</del>]</div></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">|-</ins></div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">| Application || systemd unit <code>nodeapp<</ins>/<ins class=\"diffchange diffchange-inline\">code>, code in </ins>/<ins class=\"diffchange diffchange-inline\">opt</ins>/<ins class=\"diffchange diffchange-inline\">app || 3000 || Account service</ins>: <ins class=\"diffchange diffchange-inline\">serves customer positions from PostgreSQL '''on db1''' as JSON at </ins>/<ins class=\"diffchange diffchange-inline\">api</ins>/<ins class=\"diffchange diffchange-inline\">positions, which the website fetches</ins>. <ins class=\"diffchange diffchange-inline\">Reads config from /opt</ins>/<ins class=\"diffchange diffchange-inline\">app</ins>/<ins class=\"diffchange diffchange-inline\">config.json</ins></div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">|}</ins></div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div>\u00a0</div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">== Operational notes ==</ins></div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">* Restart services with <code>systemctl restart nginx|nodeapp<</ins>/<ins class=\"diffchange diffchange-inline\">code>.</ins></div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div>* <ins class=\"diffchange diffchange-inline\">Application logs</ins>: <ins class=\"diffchange diffchange-inline\"><code>journalctl -u nodeapp<</ins>/<ins class=\"diffchange diffchange-inline\">code></ins>. <ins class=\"diffchange diffchange-inline\">It exits nonzero if </ins>/<ins class=\"diffchange diffchange-inline\">opt</ins>/<ins class=\"diffchange diffchange-inline\">app</ins>/<ins class=\"diffchange diffchange-inline\">config</ins>.<ins class=\"diffchange diffchange-inline\">json is missing or the database is unreachable</ins>.</div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">* The database is PostgreSQL on [[Db1]], port 5432, reachable only from inside the network. If the app reports database errors, check db1 too - but remember this agent may only diagnose there, not change anything</ins>.</div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div>* <ins class=\"diffchange diffchange-inline\">Disk pressure history</ins>: <ins class=\"diffchange diffchange-inline\">log growth under </ins>/<ins class=\"diffchange diffchange-inline\">var</ins>/<ins class=\"diffchange diffchange-inline\">log has filled the disk before</ins>. <ins class=\"diffchange diffchange-inline\">Safe to delete old files in /var</ins>/<ins class=\"diffchange diffchange-inline\">log</ins>/<ins class=\"diffchange diffchange-inline\">app-debug</ins>/<ins class=\"diffchange diffchange-inline\">.</ins></div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div>* <ins class=\"diffchange diffchange-inline\">Monitoring</ins>: <ins class=\"diffchange diffchange-inline\">Icinga checks website, nodeapp and disk on cust1, and postgres and disk on db1, from the ops core host</ins>.</div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div>\u00a0</div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">== Escalation ==</ins></div></td></tr>\n<tr><td colspan=\"2\" class=\"diff-side-deleted\"></td><td class=\"diff-marker\" data-marker=\"+\"></td><td class=\"diff-addedline diff-side-added\"><div><ins class=\"diffchange diffchange-inline\">Before changing anything, check the [[Maintenance calendar]] and open tickets for planned work</ins>. <ins class=\"diffchange diffchange-inline\">If the fix is not obvious or requires data-destructive steps, stop and hand over </ins>to <ins class=\"diffchange diffchange-inline\">the on-call engineer in the Incidents channel. Changes </ins>on <ins class=\"diffchange diffchange-inline\">db1 always require an engineer (or an emergency access grant) - see [[Db1</ins>]<ins class=\"diffchange diffchange-inline\">].</ins></div></td></tr>\n"
}
}