mirror of
https://github.com/mastodon/mastodon.git
synced 2024-11-08 08:44:27 +00:00
Refactor streaming to simplify for logging change (#28056)
This commit is contained in:
Emelia Smith
GitHub
parent
4949b6da58
commit
a4de0e364b
|
|
@ -12,10 +12,12 @@ const { JSDOM } = require('jsdom');
|
|||
const log = require('npmlog');
|
||||
const pg = require('pg');
|
||||
const dbUrlToConfig = require('pg-connection-string').parse;
|
||||
const metrics = require('prom-client');
|
||||
const uuid = require('uuid');
|
||||
const WebSocket = require('ws');
|
||||
|
||||
const { setupMetrics } = require('./metrics');
|
||||
const { isTruthy } = require("./utils");
|
||||
|
||||
const environment = process.env.NODE_ENV || 'development';
|
||||
|
||||
// Correctly detect and load .env or .env.production file based on environment:
|
||||
|
|
@ -196,78 +198,15 @@ const startServer = async () => {
|
|||
const redisClient = await createRedisClient(redisConfig);
|
||||
const { redisPrefix } = redisConfig;
|
||||
|
||||
// Collect metrics from Node.js
|
||||
metrics.collectDefaultMetrics();
|
||||
|
||||
new metrics.Gauge({
|
||||
name: 'pg_pool_total_connections',
|
||||
help: 'The total number of clients existing within the pool',
|
||||
collect() {
|
||||
this.set(pgPool.totalCount);
|
||||
},
|
||||
});
|
||||
|
||||
new metrics.Gauge({
|
||||
name: 'pg_pool_idle_connections',
|
||||
help: 'The number of clients which are not checked out but are currently idle in the pool',
|
||||
collect() {
|
||||
this.set(pgPool.idleCount);
|
||||
},
|
||||
});
|
||||
|
||||
new metrics.Gauge({
|
||||
name: 'pg_pool_waiting_queries',
|
||||
help: 'The number of queued requests waiting on a client when all clients are checked out',
|
||||
collect() {
|
||||
this.set(pgPool.waitingCount);
|
||||
},
|
||||
});
|
||||
|
||||
const connectedClients = new metrics.Gauge({
|
||||
name: 'connected_clients',
|
||||
help: 'The number of clients connected to the streaming server',
|
||||
labelNames: ['type'],
|
||||
});
|
||||
|
||||
const connectedChannels = new metrics.Gauge({
|
||||
name: 'connected_channels',
|
||||
help: 'The number of channels the streaming server is streaming to',
|
||||
labelNames: [ 'type', 'channel' ]
|
||||
});
|
||||
|
||||
const redisSubscriptions = new metrics.Gauge({
|
||||
name: 'redis_subscriptions',
|
||||
help: 'The number of Redis channels the streaming server is subscribed to',
|
||||
});
|
||||
|
||||
const redisMessagesReceived = new metrics.Counter({
|
||||
name: 'redis_messages_received_total',
|
||||
help: 'The total number of messages the streaming server has received from redis subscriptions'
|
||||
});
|
||||
|
||||
const messagesSent = new metrics.Counter({
|
||||
name: 'messages_sent_total',
|
||||
help: 'The total number of messages the streaming server sent to clients per connection type',
|
||||
labelNames: [ 'type' ]
|
||||
});
|
||||
|
||||
// Prime the gauges so we don't loose metrics between restarts:
|
||||
redisSubscriptions.set(0);
|
||||
connectedClients.set({ type: 'websocket' }, 0);
|
||||
connectedClients.set({ type: 'eventsource' }, 0);
|
||||
|
||||
// For each channel, initialize the gauges at zero; There's only a finite set of channels available
|
||||
CHANNEL_NAMES.forEach(( channel ) => {
|
||||
connectedChannels.set({ type: 'websocket', channel }, 0);
|
||||
connectedChannels.set({ type: 'eventsource', channel }, 0);
|
||||
});
|
||||
|
||||
// Prime the counters so that we don't loose metrics between restarts.
|
||||
// Unfortunately counters don't support the set() API, so instead I'm using
|
||||
// inc(0) to achieve the same result.
|
||||
redisMessagesReceived.inc(0);
|
||||
messagesSent.inc({ type: 'websocket' }, 0);
|
||||
messagesSent.inc({ type: 'eventsource' }, 0);
|
||||
const metrics = setupMetrics(CHANNEL_NAMES, pgPool);
|
||||
// TODO: migrate all metrics to metrics.X.method() instead of just X.method()
|
||||
const {
|
||||
connectedClients,
|
||||
connectedChannels,
|
||||
redisSubscriptions,
|
||||
redisMessagesReceived,
|
||||
messagesSent,
|
||||
} = metrics;
|
||||
|
||||
// When checking metrics in the browser, the favicon is requested this
|
||||
// prevents the request from falling through to the API Router, which would
|
||||
|
|
@ -388,25 +327,6 @@ const startServer = async () => {
|
|||
}
|
||||
};
|
||||
|
||||
const FALSE_VALUES = [
|
||||
false,
|
||||
0,
|
||||
'0',
|
||||
'f',
|
||||
'F',
|
||||
'false',
|
||||
'FALSE',
|
||||
'off',
|
||||
'OFF',
|
||||
];
|
||||
|
||||
/**
|
||||
* @param {any} value
|
||||
* @returns {boolean}
|
||||
*/
|
||||
const isTruthy = value =>
|
||||
value && !FALSE_VALUES.includes(value);
|
||||
|
||||
/**
|
||||
* @param {any} req
|
||||
* @param {any} res
|
||||
|
|
|
|||
105
streaming/metrics.js
Normal file
105
streaming/metrics.js
Normal file
|
|
@ -0,0 +1,105 @@
|
|||
// @ts-check
|
||||
|
||||
const metrics = require('prom-client');
|
||||
|
||||
/**
|
||||
* @typedef StreamingMetrics
|
||||
* @property {metrics.Registry} register
|
||||
* @property {metrics.Gauge<"type">} connectedClients
|
||||
* @property {metrics.Gauge<"type" | "channel">} connectedChannels
|
||||
* @property {metrics.Gauge} redisSubscriptions
|
||||
* @property {metrics.Counter} redisMessagesReceived
|
||||
* @property {metrics.Counter<"type">} messagesSent
|
||||
*/
|
||||
|
||||
/**
|
||||
*
|
||||
* @param {string[]} channels
|
||||
* @param {import('pg').Pool} pgPool
|
||||
* @returns {StreamingMetrics}
|
||||
*/
|
||||
function setupMetrics(channels, pgPool) {
|
||||
// Collect metrics from Node.js
|
||||
metrics.collectDefaultMetrics();
|
||||
|
||||
new metrics.Gauge({
|
||||
name: 'pg_pool_total_connections',
|
||||
help: 'The total number of clients existing within the pool',
|
||||
collect() {
|
||||
this.set(pgPool.totalCount);
|
||||
},
|
||||
});
|
||||
|
||||
new metrics.Gauge({
|
||||
name: 'pg_pool_idle_connections',
|
||||
help: 'The number of clients which are not checked out but are currently idle in the pool',
|
||||
collect() {
|
||||
this.set(pgPool.idleCount);
|
||||
},
|
||||
});
|
||||
|
||||
new metrics.Gauge({
|
||||
name: 'pg_pool_waiting_queries',
|
||||
help: 'The number of queued requests waiting on a client when all clients are checked out',
|
||||
collect() {
|
||||
this.set(pgPool.waitingCount);
|
||||
},
|
||||
});
|
||||
|
||||
const connectedClients = new metrics.Gauge({
|
||||
name: 'connected_clients',
|
||||
help: 'The number of clients connected to the streaming server',
|
||||
labelNames: ['type'],
|
||||
});
|
||||
|
||||
const connectedChannels = new metrics.Gauge({
|
||||
name: 'connected_channels',
|
||||
help: 'The number of channels the streaming server is streaming to',
|
||||
labelNames: [ 'type', 'channel' ]
|
||||
});
|
||||
|
||||
const redisSubscriptions = new metrics.Gauge({
|
||||
name: 'redis_subscriptions',
|
||||
help: 'The number of Redis channels the streaming server is subscribed to',
|
||||
});
|
||||
|
||||
const redisMessagesReceived = new metrics.Counter({
|
||||
name: 'redis_messages_received_total',
|
||||
help: 'The total number of messages the streaming server has received from redis subscriptions'
|
||||
});
|
||||
|
||||
const messagesSent = new metrics.Counter({
|
||||
name: 'messages_sent_total',
|
||||
help: 'The total number of messages the streaming server sent to clients per connection type',
|
||||
labelNames: [ 'type' ]
|
||||
});
|
||||
|
||||
// Prime the gauges so we don't loose metrics between restarts:
|
||||
redisSubscriptions.set(0);
|
||||
connectedClients.set({ type: 'websocket' }, 0);
|
||||
connectedClients.set({ type: 'eventsource' }, 0);
|
||||
|
||||
// For each channel, initialize the gauges at zero; There's only a finite set of channels available
|
||||
channels.forEach(( channel ) => {
|
||||
connectedChannels.set({ type: 'websocket', channel }, 0);
|
||||
connectedChannels.set({ type: 'eventsource', channel }, 0);
|
||||
});
|
||||
|
||||
// Prime the counters so that we don't loose metrics between restarts.
|
||||
// Unfortunately counters don't support the set() API, so instead I'm using
|
||||
// inc(0) to achieve the same result.
|
||||
redisMessagesReceived.inc(0);
|
||||
messagesSent.inc({ type: 'websocket' }, 0);
|
||||
messagesSent.inc({ type: 'eventsource' }, 0);
|
||||
|
||||
return {
|
||||
register: metrics.register,
|
||||
connectedClients,
|
||||
connectedChannels,
|
||||
redisSubscriptions,
|
||||
redisMessagesReceived,
|
||||
messagesSent,
|
||||
};
|
||||
}
|
||||
|
||||
exports.setupMetrics = setupMetrics;
|
||||
22
streaming/utils.js
Normal file
22
streaming/utils.js
Normal file
|
|
@ -0,0 +1,22 @@
|
|||
// @ts-check
|
||||
|
||||
const FALSE_VALUES = [
|
||||
false,
|
||||
0,
|
||||
'0',
|
||||
'f',
|
||||
'F',
|
||||
'false',
|
||||
'FALSE',
|
||||
'off',
|
||||
'OFF',
|
||||
];
|
||||
|
||||
/**
|
||||
* @param {any} value
|
||||
* @returns {boolean}
|
||||
*/
|
||||
const isTruthy = value =>
|
||||
value && !FALSE_VALUES.includes(value);
|
||||
|
||||
exports.isTruthy = isTruthy;
|
||||
Loading…
Reference in a new issue