pracucci

Design

Web workers can use the Prometheus PHP client to track metrics. Such metrics are stored in memory and also copied to a shared memory from which another process in the same SysV IPC namespace can read. This design allows us to run a micro webserver in a sidecar container from which we can export Prometheus metrics collected in the worker's cli app.

IPC namespace: when deployed on K8S, two containers of the same Pod run in the same IPC namespace, while two different pods on the same host run on a different IPC namespace unless explicitly configured to all share the host's IPC running the pod with hostIPC: true.

Why this design

There are three options to export metrics to Prometheus from a cli app:

pracucci

#!/bin/bash

# Init
OPT_FROM_FILES=
OPT_DEPLOYMENT=
OPT_CONTAINER=
OPT_SIGNAL=
OPT_YES=0

# Helper to print usage

pracucci

Verifying that +pracucci is my blockchain ID. https://onename.com/pracucci

pracucci

/**
 * Returns the RGB color of a string.
 */
public static int getColorFromString(String input)
{
    int hash = 0;
    int prc = -10;

    // Generate hash
    for (int i = 0; i < input.length(); i++) {

pracucci

            Cursor cursor = getActivity().getContentResolver().query(
                    Uri.parse("content://com.google.android.music.MusicContent/audio"),
                    new String[] { "_id", "CanonicalName" }, // new String[]{"_id", "playlist_name"},
                    null, null, null);

            // android.database.sqlite.SQLiteException: no such column: SongCount (code 1): , while compiling: SELECT null AS containerType, CanonicalAlbum, CanonicalName, max(Nid) AS Nid, Album AS album, (MIN(LocalCopyType)  != 300) AS hasRemote, null AS domainParam, max(StoreAlbumId) AS StoreAlbumId, Composer AS composer, 'audio/*' AS mime_type, count(distinct(SongId)) AS _count, SongCount AS keeponSongCount, Genre AS Genre, Year AS year, Size, 0 AS bookmark, Domain, 1 AS is_music, DiscNumber, MUSIC.SourceId AS SourceId, FileDate, CanonicalAlbumArtist AS artistSort, Rating, null AS containerName, BitRate, null AS containerId, MUSIC.SourceAccount AS SourceAccount, AlbumArtist, AlbumArtistId, (MAX(LocalCopyType)  I