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369 lines
14 KiB
Plaintext
369 lines
14 KiB
Plaintext
// This is a jsonnet file, it generates kubernetes manifests.
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// To generate and apply, run "jsonnet k8s.jsonnet | kubectl apply -f -"
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// Note that this file is currently not as advanced as its docker-compose variant
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// This file can only be used for replication nodes and editing nodes
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// see config.enabled for more info on what components can be used
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{
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kind: "List",
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apiVersion: "v1",
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config:: {
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// These are the important top-level settings.
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// Change these to configure the services.
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// Image tag (application version) to use.
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// Note: "latest" is not recommended in production, as you can't be sure what version
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// you're actually running, and must manually re-pull to get an updated copy.
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image_tag: "latest",
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// For each component, whether to deploy that component.
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enabled: {
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downloader: true,
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restreamer: true,
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backfiller: true,
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cutter: false, // TODO, docker-compose only for now
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sheetsync: false, // TODO, docker-compose only for now
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thrimshim: true,
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segment_coverage: true,
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playlist_manager: false, // TODO, docker-compose only for now
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nginx: true,
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postgres: false, // TODO, docker-compose only for now
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},
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// Twitch channels to capture.
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// Channels suffixed with a '!' are considered "important" and will be retried more aggressively
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// and warned about if they're not currently streaming.
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channels: ["desertbus!", "db_chief", "db_high", "db_audio", "db_bus"],
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// Stream qualities to capture
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qualities: ["source", "480p"],
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// NFS settings for RWX (ReadWriteMany) volume for wubloader pods
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nfs_server: "nfs.example.com", # server IP or hostname
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nfs_path: "/mnt/wubloader", # path on server to mount
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nfs_capacity: "2TiB", # storage capacity to report to k8s
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// The local port within each container to bind the backdoor server on.
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// You can exec into the container and telnet to this port to get a python shell.
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backdoor_port: 1234,
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// Other nodes to always backfill from. You should not include the local node.
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// If you are using the database to find peers, you should leave this empty.
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peers: [
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],
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// This node's name in the nodes table of the database
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localhost: "node_name",
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// The hostname to use in the Ingress
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ingress_host: "wubloader.example.com",
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// Set to true to let the ingress handle TLS
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ingress_tls: true,
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// Ingress class for ingress
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ingress_class_name: "nginx",
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// Uncomment and give a secretName for ingress, if required for ingress TLS
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//ingress_secret_name: "wubloader-tls",
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// Additional metadata labels for Ingress (cert-manager, etc.) - adjust as needed for your setup
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ingress_labels: {},
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// Connection args for the database.
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// If database is defined in this config, host and port should be postgres:5432.
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db_args: {
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user: "vst",
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password: "dbfh2019", // don't use default in production. Must not contain ' or \ as these are not escaped.
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host: "postgres",
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port: 5432,
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dbname: "wubloader",
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},
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// The timestamp corresponding to 00:00 in bustime
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bustime_start: "1970-01-01T00:00:00Z",
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// The timestamps to start/end segment coverage maps at.
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// Generally 1 day before and 7 days after bus start.
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coverage_start: "1969-12-31T00:00:00Z",
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coverage_end: "1970-01-07T00:00:00Z",
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// Max hours ago to backfill, ie. do not backfill for times before this many hours ago.
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// Set to null to disable.
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backfill_max_hours_ago: 24 * 30 * 6, // approx 6 months
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// Extra options to pass via environment variables,
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// eg. log level, disabling stack sampling.
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env: {
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// Uncomment this to set log level to debug
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// WUBLOADER_LOG_LEVEL: "DEBUG",
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// Uncomment this to enable stacksampling performance monitoring
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// WUBLOADER_ENABLE_STACKSAMPLER: "true",
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},
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// Config for cutter upload locations. See cutter docs for full detail.
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cutter_config:: {
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desertbus: {type: "youtube"},
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unlisted: {type: "youtube", hidden: true, no_transcode_check: true},
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},
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default_location:: "desertbus",
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// The header to put at the front of video titles, eg. a video with a title
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// of "hello world" with title header "foo" becomes: "foo - hello world".
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title_header:: "DB2019",
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// The footer to put at the bottom of descriptions, in its own paragraph
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description_footer:: "Uploaded by the Desert Bus Video Strike Team",
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},
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// A few derived values.
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// The connection string for the database. Constructed from db_args.
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db_connect:: std.join(" ", [
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"%s='%s'" % [key, $.config.db_args[key]]
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for key in std.objectFields($.config.db_args)
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]),
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// Cleaned up version of $.channels without importance markers
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clean_channels:: [std.split(c, '!')[0] for c in $.config.channels],
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// k8s-formatted version of env dict
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env_list:: [
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{name: key, value: $.config.env[key]}
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for key in std.objectFields($.config.env)
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],
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// This function generates deployments for each service, since they only differ slightly,
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// with only a different image, CLI args and possibly env vars.
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// The image name is derived from the component name
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// (eg. "downloader" is quay.io/ekimekim/wubloader-downloader)
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// so we only pass in name, args and env vars (with the latter two optional).
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// Optional kwargs work just like python.
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deployment(name, args=[], env=[]):: {
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kind: "Deployment",
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apiVersion: "apps/v1",
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metadata: {
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name: "wubloader-%s" % name,
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labels: {app: "wubloader", component: name},
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},
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spec: {
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replicas: 1,
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selector: {
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matchLabels: {app: "wubloader", component: name},
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},
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template: {
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metadata: {
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labels: {app: "wubloader", component: name},
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},
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spec: {
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containers: [
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{
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name: name,
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// segment-coverage is called segment_coverage in the image, so replace - with _
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image: "quay.io/ekimekim/wubloader-%s:%s" % [std.strReplace(name, "-", "_"), $.config.image_tag],
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args: args,
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volumeMounts: [{name: "data", mountPath: "/mnt"}],
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env: $.env_list + env, // main env list combined with any deployment-specific ones
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},
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],
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volumes: [
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{
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name: "data",
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persistentVolumeClaim: {"claimName": "mnt-wubloader"},
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},
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]
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},
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},
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},
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},
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// This function generates a Service object for each service, since they're basically identical.
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service(name):: {
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kind: "Service",
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apiVersion: "v1",
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metadata: {
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name: "wubloader-%s" % name,
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labels: {app: "wubloader", component: name},
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},
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spec: {
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selector: {app: "wubloader", component: name},
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ports: [{name: "http", port: 80, targetPort: 80}],
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},
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},
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// The actual manifests to output, filtering out "null" from disabled components.
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items: [comp for comp in $.components if comp != null],
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// These are all the deployments and services.
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// Note that all components work fine if multiple are running
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// (they may duplicate work, but not cause errors by stepping on each others' toes).
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components:: [
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// The downloader watches the twitch stream and writes the HLS segments to disk
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if $.config.enabled.downloader then $.deployment("downloader", args=$.config.channels + [
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"--base-dir", "/mnt",
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"--qualities", std.join(",", $.config.qualities),
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"--backdoor-port", std.toString($.config.backdoor_port),
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"--metrics-port", "80",
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]),
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// The restreamer is a http server that fields requests for checking what segments exist
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// and allows HLS streaming of segments from any requested timestamp
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if $.config.enabled.restreamer then $.deployment("restreamer", args=[
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"--base-dir", "/mnt",
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"--backdoor-port", std.toString($.config.backdoor_port),
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"--port", "80",
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]),
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// The backfiller periodically compares what segments exist locally to what exists on
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// other nodes. If it finds ones it doesn't have, it downloads them.
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// It can talk to the database to discover other wubloader nodes, or be given a static list.
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if $.config.enabled.backfiller then $.deployment("backfiller", args=$.clean_channels + [
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"--base-dir", "/mnt",
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"--qualities", std.join(",", $.config.qualities),
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"--static-nodes", std.join(",", $.config.peers),
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"--backdoor-port", std.toString($.config.backdoor_port),
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"--node-database", $.db_connect,
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"--localhost", $.config.localhost,
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"--metrics-port", "80",
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] + (if $.config.backfill_max_hours_ago == null then [] else [
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"--start", std.toString($.config.backfill_max_hours_ago),
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])),
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// Segment coverage is a monitoring helper that periodically scans available segments
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// and reports stats. It also creates a "coverage map" image to represent this info.
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// It puts this in the segment directory where nginx will serve it.
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if $.config.enabled.segment_coverage then $.deployment("segment-coverage", args=$.clean_channels + [
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"--base-dir", "/mnt",
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"--qualities", std.join(",", $.config.qualities),
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"--metrics-port", "80",
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"--first-hour", $.config.coverage_start,
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"--last-hour", $.config.coverage_end,
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]),
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// Thrimshim acts as an interface between the thrimbletrimmer editor and the database
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// It is needed for thrimbletrimmer to be able to get unedited videos and submit edits
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if $.config.enabled.thrimshim then $.deployment("thrimshim", args=[
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"--port", "80",
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"--backdoor-port", std.toString($.config.backdoor_port),
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"--title-header", $.config.title_header,
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"--description-footer", $.config.description_footer,
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"--upload-locations", std.join(",", [$.config.default_location] + [
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location for location in std.objectFields($.config.cutter_config)
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if location != $.config.default_location
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]),
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$.db_connect,
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$.clean_channels[0], // use first element as default channel
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$.config.bustime_start,
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]),
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// Normally nginx would be responsible for proxying requests to different services,
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// but in k8s we can use Ingress to do that. However nginx is still needed to serve
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// static content - segments as well as thrimbletrimmer.
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if $.config.enabled.nginx then $.deployment("nginx", env=[
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{name: "THRIMBLETRIMMER", value: "true"},
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{name: "SEGMENTS", value: "/mnt"},
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]),
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// Services for all deployments
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if $.config.enabled.downloader then $.service("downloader"),
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if $.config.enabled.backfiller then $.service("backfiller"),
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if $.config.enabled.nginx then $.service("nginx"),
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if $.config.enabled.restreamer then $.service("restreamer"),
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if $.config.enabled.segment_coverage then $.service("segment-coverage"),
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if $.config.enabled.thrimshim then $.service("thrimshim"),
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// PV manifest
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{
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apiVersion: "v1",
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kind: "PersistentVolume",
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metadata: {
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name: "mnt-wubloader",
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labels: {app: "wubloader"},
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},
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spec: {
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accessModes: ["ReadWriteMany"],
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capacity: {
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storage: $.config.nfs_capacity
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},
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mountOptions: ["fsc"],
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nfs: {
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server: $.config.nfs_server,
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path: $.config.nfs_path,
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readOnly: false
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},
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persistentVolumeReclaimPolicy: "Retain",
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volumeMode: "Filesystem"
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},
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},
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// PVC manifest
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{
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apiVersion: "v1",
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kind: "PersistentVolumeClaim",
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metadata: {
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name: "mnt-wubloader",
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labels: {app: "wubloader"},
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},
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spec: {
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accessModes: ["ReadWriteMany"],
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resources: {
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requests: {
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storage: $.config.nfs_capacity
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},
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},
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volumeName: "mnt-wubloader"
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},
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},
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// Ingress to direct requests to the correct services.
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{
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kind: "Ingress",
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apiVersion: "networking.k8s.io/v1",
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metadata: {
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name: "wubloader",
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labels: {app: "wubloader"} + $.config.ingress_labels,
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},
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spec: {
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ingressClassName: $.config.ingress_class_name,
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rules: [
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{
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host: $.config.ingress_host,
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http: {
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// Helper functions for defining the path rules below
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local rule(name, path, type) = {
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path: path,
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pathType: type,
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backend: {
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service: {
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name: "wubloader-%s" % std.strReplace(name, "_", "-"),
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port: {
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number: 80
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},
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},
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},
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},
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local metric_rule(name) = rule(name, "/metrics/%s" % name, "Exact"),
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paths: [
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// Map /metrics/NAME to each service
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metric_rule("downloader"),
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metric_rule("backfiller"),
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metric_rule("restreamer"),
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metric_rule("segment_coverage"),
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metric_rule("thrimshim"),
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// Map /segments and /thrimbletrimmer to the static content nginx
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rule("nginx", "/segments", "Prefix"),
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rule("nginx", "/thrimbletrimmer", "Prefix"),
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// Map /thrimshim to the thrimshim service
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rule("thrimshim", "/thrimshim", "Prefix"),
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// Map everything else to restreamer
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rule("restreamer", "/", "Prefix"),
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],
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},
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},
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],
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[if $.config.ingress_tls then 'tls']: [
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{
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hosts: [
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$.config.ingress_host,
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],
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[if "ingress_secret_name" in $.config then 'secretName']: $.config.ingress_secret_name,
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},
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],
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},
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},
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],
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}
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