app/radio/kube/radio.libsonnet

local kube = import "../../../kube/kube.libsonnet";

{
    local radio = self,
    local cfg = radio.cfg,

    cfg:: {
        namespace: error "namespace must be set",
        appName: "radio",
        prefix: "", # if set, should be 'foo-'
        port: 2137,

        icecast: {
                location: error "location must be set",
                admin: error "admin must be set",
                limits: {
                        clients: 100,
                        sources: 2,
                        threadpool: 5,
                        queueSize: 524288,
                        clientTimeout: 30,
                        headerTimeout: 15,
                        sourceTimeout: 10,
                        burstOnConnect: true,
                        burstSize: 65535,
                },
                authentication: {
                        sourcePassword: error "source password must be set",
                        relayPassword: error "relay password must be set",
                        adminPassword: error "admin password must be set",
                },
                hostname: "localhost",
                listenPort: 8080,
                mounts: [],
        },

        tag: "latest",
        image: "registry.k0.hswaw.net/app/radio:" + cfg.tag,
        resources: {
            requests: {
                cpu: "25m",
                memory: "50Mi",
            },
            limits: {
                cpu: "100m",
                memory: "200Mi",
            },
        },
    },

    mount:: {
        username: error "mount username must be defined",
        password: error "mount password must be defined",
        genre: "Classical",
        bitrate: 128,
        hidden: false,
        fallbackMount: null,
    },

    makeName(suffix):: cfg.prefix + suffix,

    metadata:: {
        namespace: cfg.namespace,
        labels: {
            "app.kubernetes.io/name": cfg.appName,
            "app.kubernetes.io/managed-by": "kubecfg",
            "app.kubernetes.io/component": "radio",
        },
    },

    configMap: kube.ConfigMap(radio.makeName("icecast")) {
        metadata+: radio.metadata,
        data: {
            "icecast.xml": std.manifestXmlJsonml(["icecast",
                ["location", cfg.icecast.location],
                ["admin", cfg.icecast.admin],
                ["limits",
                    ["clients", std.toString(cfg.icecast.limits.clients)],
                    ["sources", std.toString(cfg.icecast.limits.sources)],
                    ["threadpool", std.toString(cfg.icecast.limits.threadpool)],
                    ["queue-size", std.toString(cfg.icecast.limits.queueSize)],
                    ["client-timeout", std.toString(cfg.icecast.limits.clientTimeout)],
                    ["header-timeout", std.toString(cfg.icecast.limits.headerTimeout)],
                    ["source-timeout", std.toString(cfg.icecast.limits.sourceTimeout)],
                    ["burst-on-connect", if cfg.icecast.limits.burstOnConnect then "1" else "0"],
                    ["burst-size", std.toString(cfg.icecast.limits.burstSize)],
                ],
                ["authentication",
                    ["source-password", cfg.icecast.authentication.sourcePassword],
                    ["relay-password", cfg.icecast.authentication.relayPassword],
                    ["admin-password", cfg.icecast.authentication.adminPassword],
                ],
                ["hostname", cfg.icecast.hostname],
                ["listen-socket", 
                    ["port", std.toString(cfg.icecast.listenPort)],
                ],
                ["fileserve", "1"],
                ["paths", 
                    ["webroot", "/usr/share/icecast/web"],
                ],
                ["logging",
                    ["accesslog", "-"],
                    ["errorlog", "-"],
                    ["loglevel", "2"],
                ],
                ["security",
                    ["chroot", "0"],
                ],
             ] + [
                ["mount", {type: "normal"},
                    ["mount-name", m],
                    ["username", cfg.icecast.mounts[m].username],
                    ["password", cfg.icecast.mounts[m].password],
                    ["public", if cfg.icecast.mounts[m].public then "1" else "0"],
                    ["genre", cfg.icecast.mounts[m].genre],
                    ["bitrate", std.toString(cfg.icecast.mounts[m].bitrate)],
                    ["hidden", if cfg.icecast.mounts[m].hidden then "1" else "0"],
                ] + (if cfg.icecast.mounts[m].fallbackMount != null then
                    [["fallback-mount", cfg.icecast.mounts[m].fallbackMount]] else []
                )
                for m in std.objectFields(cfg.icecast.mounts)
             ]),
        },
    },

    deployment: kube.Deployment(radio.makeName("icecast")) {
        metadata+: radio.metadata,
        spec+: {
            replicas: 1,
            template+: {
                spec+: {
                    volumes_: {
                        config: kube.ConfigMapVolume(radio.configMap),
                    },
                    containers_: {
                        radio: kube.Container(radio.makeName("radio")) {
                            image: cfg.image,
                            ports_: {
                                client: { containerPort: cfg.icecast.listenPort },
                            },
                            volumeMounts_: {
                                config: { mountPath: "/usr/share/icecast/icecast.xml", subPath: "icecast.xml" },
                            },
                            resources: cfg.resources,
                        },
                    },
                },
            },
        },
    },
    svc: kube.Service(radio.makeName("icecast")) {
        metadata+: radio.metadata,
        target_pod:: radio.deployment.spec.template,
        spec+: {
            ports: [
                { name: "client", port: cfg.port, targetPort: cfg.icecast.listenPort, protocol: "TCP" },
            ],
            type: "LoadBalancer",
        },
    },
}