diff --git a/apps/api/app/routes/session.ts b/apps/api/app/routes/session.ts index f84c9858..e8fb696d 100644 --- a/apps/api/app/routes/session.ts +++ b/apps/api/app/routes/session.ts @@ -164,12 +164,17 @@ export namespace SessionApi { // A box runs one thing at a time. Refusing is the honest answer; // starting a second run would leave two rows that both think they // own the same hardware. + // + // This read is the message, not the guarantee — two callers can + // both pass it. `Session.request` is refused by a unique index on + // the same predicate, and answers with the same 409 in the same + // words, so which one caught it is not visible from here. const active = await Session.activeForBox(box.id); if (active) { - conflict('That box already has a run that has not stopped'); + conflict(Session.BOX_BUSY); } - const session = await Session.create({ + const session = await Session.request({ id: Identifier.ascending('session'), boxId: box.id, gameId: game.id, @@ -185,7 +190,7 @@ export namespace SessionApi { tags: ['Session'], summary: 'Read a run you asked for', description: - 'Poll this while a run starts. The ticket appears part-way through and is republished as addresses are discovered, so re-read it rather than keeping the first one — a client that treats the first ticket as final works on a local network and fails from anywhere else.', + 'Poll this while a run starts. The ticket appears part-way through and is republished as addresses are discovered, so re-read it rather than keeping the first one — a client that treats the first ticket as final works on a local network and fails from anywhere else. Once the run reaches a terminal state the ticket is null: stop polling and stop dialling it.', responses: { 200: { content: { 'application/json': { schema: Result(Session.Info) } }, diff --git a/apps/api/test/session.test.ts b/apps/api/test/session.test.ts index 03c6ba5f..de58463c 100644 --- a/apps/api/test/session.test.ts +++ b/apps/api/test/session.test.ts @@ -191,6 +191,29 @@ describe('POST /session', () => { expect(second.body.type).toBe('already_exists'); }); + test('two requests racing for one box still start it once', async () => { + const s = await scene('route-race', 5509); + const [a, b] = await Promise.all([requestSession(s), requestSession(s)]); + + // Which request wins is a timing detail; that exactly one does is not. + // The pre-check and the unique index answer identically, so the loser + // cannot tell which caught it. + // + // This asserts the endpoint's answer, not the invariant: two requests + // in one process usually interleave such that the pre-check catches + // the second, so it passes with the unique index dropped. The index is + // pinned in the core tests, where both callers can be made to read + // before either writes. + const statuses = [a.res.status, b.res.status].sort(); + expect(statuses).toEqual([201, 409]); + expect([a.body, b.body].find((x) => x.type)?.type).toBe('already_exists'); + + expect(await Session.listByBox(s.box.id)).toHaveLength(1); + // The failure this prevents: the host offered the same box twice. + const jobs = await app.request('/machine/jobs', { headers: s.host }); + expect(((await jobs.json()) as any).data).toHaveLength(1); + }); + test('you can only play as an account you have linked', async () => { const mine = await scene('route-account-mine', 5505); const theirs = await scene('route-account-theirs', 5506); @@ -539,6 +562,35 @@ describe('POST /session/:id/ticket', () => { expect((await Session.fromID(body.data.id))?.ticket).toBeNull(); }); + test('a run that stops loses the address it published', async () => { + const s = await scene('route-ticket-cleared', 5545); + const { body } = await requestSession(s); + const report = (state: string) => + app.request(`/session/${body.data.id}/state`, { + method: 'POST', + headers: s.host, + body: JSON.stringify({ state }) + }); + await report('starting'); + await report('live'); + const published = await app.request(`/session/${body.data.id}/ticket`, { + method: 'POST', + headers: s.host, + body: JSON.stringify({ ticket: 'nodeaaa-live' }) + }); + expect(((await published.json()) as any).data.ticket).toBe('nodeaaa-live'); + + await report('ended'); + + // The polling client is the reason. It reads this endpoint until it has + // an address, and an address left behind by a run that stopped is one + // it would dial — while publishing a replacement is already refused. + const read = await app.request(`/session/${body.data.id}`, { headers: s.user }); + const after = (await read.json()) as any; + expect(after.data.state).toBe('ended'); + expect(after.data.ticket).toBeNull(); + }); + test('a ticket has to say something', async () => { const s = await scene('route-ticket-empty', 5544); const { body } = await requestSession(s); diff --git a/packages/core/migrations/0008_session_one_active_run_per_box.sql b/packages/core/migrations/0008_session_one_active_run_per_box.sql new file mode 100644 index 00000000..fc391067 --- /dev/null +++ b/packages/core/migrations/0008_session_one_active_run_per_box.sql @@ -0,0 +1,30 @@ +-- A box runs one thing at a time, and now the database is what says so. +-- +-- `POST /session` reads `session.activeForBox` and refuses when something is +-- already running, but the read and the insert are two statements. Two requests +-- that both read "nothing is running" before either inserts each get a row, and +-- `/machine/jobs` then hands the host the same box to start twice. A partial +-- unique index on the same predicate the read asks about makes the second +-- insert fail instead. ref(d-0048) +-- +-- The index cannot be created while any box already has two unstopped runs, so +-- the duplicates are resolved first. Keeping the newest is the only choice that +-- matches what a person saw: their most recent request is the one they are +-- waiting on. The older rows are stopped rather than deleted, because a session +-- is the billing unit and rows that were once real do not vanish from it. +-- +-- `ended` and not `failed`: nothing about these runs failed. They were work +-- nobody picked up, and `failed` carries a reason there is none of. +UPDATE "session" s +SET "state" = 'ended', "time_stopped" = now() +WHERE s."time_stopped" IS NULL + AND s."time_deleted" IS NULL + AND EXISTS ( + SELECT 1 FROM "session" newer + WHERE newer."box_id" = s."box_id" + AND newer."time_stopped" IS NULL + AND newer."time_deleted" IS NULL + AND (newer."time_created", newer."id") > (s."time_created", s."id") + );--> statement-breakpoint + +CREATE UNIQUE INDEX "session_box_active_unique" ON "session" USING btree ("box_id") WHERE time_stopped is null and time_deleted is null; diff --git a/packages/core/migrations/meta/0008_snapshot.json b/packages/core/migrations/meta/0008_snapshot.json new file mode 100644 index 00000000..9d189a9e --- /dev/null +++ b/packages/core/migrations/meta/0008_snapshot.json @@ -0,0 +1,2299 @@ +{ + "id": "2c16a831-745e-4e1d-ad95-11aaa30e31f0", + "prevId": "6f1c8157-bfc0-4b61-b31e-9e117d8d0510", + "version": "7", + "dialect": "postgresql", + "tables": { + "public.access_token": { + "name": "access_token", + "schema": "", + "columns": { + "id": { + "name": "id", + "type": "char(30)", + "primaryKey": true, + "notNull": true + }, + "time_created": { + "name": "time_created", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": true, + "default": "now()" + }, + "time_updated": { + "name": "time_updated", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": true, + "default": "now()" + }, + "time_deleted": { + "name": "time_deleted", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": false + }, + "owner_user_id": { + "name": "owner_user_id", + "type": "char(30)", + "primaryKey": false, + "notNull": true + }, + "team_id": { + "name": "team_id", + "type": "char(30)", + "primaryKey": false, + "notNull": false + }, + "name": { + "name": "name", + "type": "text", + "primaryKey": false, + "notNull": true + }, + "token_hash": { + "name": "token_hash", + "type": "text", + "primaryKey": false, + "notNull": true + }, + "expires_at": { + "name": "expires_at", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": false + }, + "last_used": { + "name": "last_used", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": false + } + }, + "indexes": { + "access_token_hash_unique": { + "name": "access_token_hash_unique", + "columns": [ + { + "expression": "token_hash", + "isExpression": false, + "asc": true, + "nulls": "last" + } + ], + "isUnique": true, + "concurrently": false, + "method": "btree", + "with": {} + }, + "access_token_owner_idx": { + "name": "access_token_owner_idx", + "columns": [ + { + "expression": "owner_user_id", + "isExpression": false, + "asc": true, + "nulls": "last" + } + ], + "isUnique": false, + "concurrently": false, + "method": "btree", + "with": {} + }, + "access_token_team_idx": { + "name": "access_token_team_idx", + "columns": [ + { + "expression": "team_id", + "isExpression": false, + "asc": true, + "nulls": "last" + } + ], + "isUnique": false, + "concurrently": false, + "method": "btree", + "with": {} + } + }, + "foreignKeys": { + "access_token_owner_user_id_user_id_fk": { + "name": "access_token_owner_user_id_user_id_fk", + "tableFrom": "access_token", + "tableTo": "user", + "columnsFrom": [ + "owner_user_id" + ], + "columnsTo": [ + "id" + ], + "onDelete": "cascade", + "onUpdate": "no action" + }, + "access_token_team_id_team_id_fk": { + "name": "access_token_team_id_team_id_fk", + "tableFrom": "access_token", + "tableTo": "team", + "columnsFrom": [ + "team_id" + ], + "columnsTo": [ + "id" + ], + "onDelete": "cascade", + "onUpdate": "no action" + } + }, + "compositePrimaryKeys": {}, + "uniqueConstraints": {}, + "policies": {}, + "checkConstraints": {}, + "isRLSEnabled": false + }, + "public.box": { + "name": "box", + "schema": "", + "columns": { + "id": { + "name": "id", + "type": "char(30)", + "primaryKey": true, + "notNull": true + }, + "time_created": { + "name": "time_created", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": true, + "default": "now()" + }, + "time_updated": { + "name": "time_updated", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": true, + "default": "now()" + }, + "time_deleted": { + "name": "time_deleted", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": false + }, + "user_id": { + "name": "user_id", + "type": "char(30)", + "primaryKey": false, + "notNull": true + }, + "machine_id": { + "name": "machine_id", + "type": "char(30)", + "primaryKey": false, + "notNull": true + }, + "label": { + "name": "label", + "type": "text", + "primaryKey": false, + "notNull": true + }, + "tier": { + "name": "tier", + "type": "box_tier", + "typeSchema": "public", + "primaryKey": false, + "notNull": true, + "default": "'sm'" + }, + "state": { + "name": "state", + "type": "box_state", + "typeSchema": "public", + "primaryKey": false, + "notNull": true, + "default": "'created'" + }, + "stop_reason": { + "name": "stop_reason", + "type": "text", + "primaryKey": false, + "notNull": false + }, + "stop_clean": { + "name": "stop_clean", + "type": "boolean", + "primaryKey": false, + "notNull": false + } + }, + "indexes": { + "box_user_idx": { + "name": "box_user_idx", + "columns": [ + { + "expression": "user_id", + "isExpression": false, + "asc": true, + "nulls": "last" + } + ], + "isUnique": false, + "concurrently": false, + "method": "btree", + "with": {} + }, + "box_machine_idx": { + "name": "box_machine_idx", + "columns": [ + { + "expression": "machine_id", + "isExpression": false, + "asc": true, + "nulls": "last" + } + ], + "isUnique": false, + "concurrently": false, + "method": "btree", + "with": {} + } + }, + "foreignKeys": { + "box_user_id_user_id_fk": { + "name": "box_user_id_user_id_fk", + "tableFrom": "box", + "tableTo": "user", + "columnsFrom": [ + "user_id" + ], + "columnsTo": [ + "id" + ], + "onDelete": "cascade", + "onUpdate": "no action" + }, + "box_machine_id_machine_id_fk": { + "name": "box_machine_id_machine_id_fk", + "tableFrom": "box", + "tableTo": "machine", + "columnsFrom": [ + "machine_id" + ], + "columnsTo": [ + "id" + ], + "onDelete": "restrict", + "onUpdate": "no action" + } + }, + "compositePrimaryKeys": {}, + "uniqueConstraints": {}, + "policies": {}, + "checkConstraints": {}, + "isRLSEnabled": false + }, + "public.game_depot": { + "name": "game_depot", + "schema": "", + "columns": { + "id": { + "name": "id", + "type": "char(30)", + "primaryKey": true, + "notNull": true + }, + "time_created": { + "name": "time_created", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": true, + "default": "now()" + }, + "time_updated": { + "name": "time_updated", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": true, + "default": "now()" + }, + "time_deleted": { + "name": "time_deleted", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": false + }, + "game_id": { + "name": "game_id", + "type": "char(30)", + "primaryKey": false, + "notNull": true + }, + "depot_id": { + "name": "depot_id", + "type": "integer", + "primaryKey": false, + "notNull": true + }, + "branch": { + "name": "branch", + "type": "text", + "primaryKey": false, + "notNull": true, + "default": "'public'" + }, + "steam_manifest_id": { + "name": "steam_manifest_id", + "type": "text", + "primaryKey": false, + "notNull": false + }, + "steam_build_id": { + "name": "steam_build_id", + "type": "integer", + "primaryKey": false, + "notNull": false + }, + "installed_manifest_id": { + "name": "installed_manifest_id", + "type": "text", + "primaryKey": false, + "notNull": false + }, + "installed_build_id": { + "name": "installed_build_id", + "type": "integer", + "primaryKey": false, + "notNull": false + }, + "size_download": { + "name": "size_download", + "type": "bigint", + "primaryKey": false, + "notNull": false + }, + "size_on_disk": { + "name": "size_on_disk", + "type": "bigint", + "primaryKey": false, + "notNull": false + }, + "status": { + "name": "status", + "type": "depot_status", + "typeSchema": "public", + "primaryKey": false, + "notNull": true, + "default": "'pending'" + }, + "error_message": { + "name": "error_message", + "type": "text", + "primaryKey": false, + "notNull": false + }, + "oslist": { + "name": "oslist", + "type": "text", + "primaryKey": false, + "notNull": false + } + }, + "indexes": { + "game_depot_unique": { + "name": "game_depot_unique", + "columns": [ + { + "expression": "game_id", + "isExpression": false, + "asc": true, + "nulls": "last" + }, + { + "expression": "depot_id", + "isExpression": false, + "asc": true, + "nulls": "last" + }, + { + "expression": "branch", + "isExpression": false, + "asc": true, + "nulls": "last" + } + ], + "isUnique": true, + "concurrently": false, + "method": "btree", + "with": {} + }, + "game_depot_game_idx": { + "name": "game_depot_game_idx", + "columns": [ + { + "expression": "game_id", + "isExpression": false, + "asc": true, + "nulls": "last" + } + ], + "isUnique": false, + "concurrently": false, + "method": "btree", + "with": {} + }, + "game_depot_updates_idx": { + "name": "game_depot_updates_idx", + "columns": [ + { + "expression": "game_id", + "isExpression": false, + "asc": true, + "nulls": "last" + } + ], + "isUnique": false, + "where": "\"game_depot\".\"installed_manifest_id\" is distinct from \"game_depot\".\"steam_manifest_id\"", + "concurrently": false, + "method": "btree", + "with": {} + } + }, + "foreignKeys": { + "game_depot_game_id_game_id_fk": { + "name": "game_depot_game_id_game_id_fk", + "tableFrom": "game_depot", + "tableTo": "game", + "columnsFrom": [ + "game_id" + ], + "columnsTo": [ + "id" + ], + "onDelete": "cascade", + "onUpdate": "no action" + } + }, + "compositePrimaryKeys": {}, + "uniqueConstraints": {}, + "policies": {}, + "checkConstraints": {}, + "isRLSEnabled": false + }, + "public.game_download": { + "name": "game_download", + "schema": "", + "columns": { + "id": { + "name": "id", + "type": "char(30)", + "primaryKey": true, + "notNull": true + }, + "time_created": { + "name": "time_created", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": true, + "default": "now()" + }, + "time_updated": { + "name": "time_updated", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": true, + "default": "now()" + }, + "time_deleted": { + "name": "time_deleted", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": false + }, + "host_id": { + "name": "host_id", + "type": "char(30)", + "primaryKey": false, + "notNull": true + }, + "game_id": { + "name": "game_id", + "type": "char(30)", + "primaryKey": false, + "notNull": true + }, + "status": { + "name": "status", + "type": "game_download_status", + "typeSchema": "public", + "primaryKey": false, + "notNull": true, + "default": "'pending'" + }, + "progress_bytes": { + "name": "progress_bytes", + "type": "bigint", + "primaryKey": false, + "notNull": false, + "default": 0 + }, + "total_bytes": { + "name": "total_bytes", + "type": "bigint", + "primaryKey": false, + "notNull": false + }, + "time_started": { + "name": "time_started", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": false + }, + "time_completed": { + "name": "time_completed", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": false + }, + "error_message": { + "name": "error_message", + "type": "text", + "primaryKey": false, + "notNull": false + } + }, + "indexes": { + "game_download_host_game_unique": { + "name": "game_download_host_game_unique", + "columns": [ + { + "expression": "host_id", + "isExpression": false, + "asc": true, + "nulls": "last" + }, + { + "expression": "game_id", + "isExpression": false, + "asc": true, + "nulls": "last" + } + ], + "isUnique": true, + "concurrently": false, + "method": "btree", + "with": {} + }, + "game_download_game_idx": { + "name": "game_download_game_idx", + "columns": [ + { + "expression": "game_id", + "isExpression": false, + "asc": true, + "nulls": "last" + } + ], + "isUnique": false, + "concurrently": false, + "method": "btree", + "with": {} + }, + "game_download_host_status_idx": { + "name": "game_download_host_status_idx", + "columns": [ + { + "expression": "host_id", + "isExpression": false, + "asc": true, + "nulls": "last" + }, + { + "expression": "status", + "isExpression": false, + "asc": true, + "nulls": "last" + } + ], + "isUnique": false, + "concurrently": false, + "method": "btree", + "with": {} + } + }, + "foreignKeys": { + "game_download_host_id_machine_id_fk": { + "name": "game_download_host_id_machine_id_fk", + "tableFrom": "game_download", + "tableTo": "machine", + "columnsFrom": [ + "host_id" + ], + "columnsTo": [ + "id" + ], + "onDelete": "cascade", + "onUpdate": "no action" + }, + "game_download_game_id_game_id_fk": { + "name": "game_download_game_id_game_id_fk", + "tableFrom": "game_download", + "tableTo": "game", + "columnsFrom": [ + "game_id" + ], + "columnsTo": [ + "id" + ], + "onDelete": "cascade", + "onUpdate": "no action" + } + }, + "compositePrimaryKeys": {}, + "uniqueConstraints": {}, + "policies": {}, + "checkConstraints": {}, + "isRLSEnabled": false + }, + "public.game": { + "name": "game", + "schema": "", + "columns": { + "id": { + "name": "id", + "type": "char(30)", + "primaryKey": true, + "notNull": true + }, + "time_created": { + "name": "time_created", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": true, + "default": "now()" + }, + "time_updated": { + "name": "time_updated", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": true, + "default": "now()" + }, + "time_deleted": { + "name": "time_deleted", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": false + }, + "steam_app_id": { + "name": "steam_app_id", + "type": "integer", + "primaryKey": false, + "notNull": true + }, + "slug": { + "name": "slug", + "type": "text", + "primaryKey": false, + "notNull": true + }, + "name": { + "name": "name", + "type": "text", + "primaryKey": false, + "notNull": true + }, + "type": { + "name": "type", + "type": "text", + "primaryKey": false, + "notNull": false + }, + "aliases": { + "name": "aliases", + "type": "text", + "primaryKey": false, + "notNull": false + }, + "client_icon": { + "name": "client_icon", + "type": "text", + "primaryKey": false, + "notNull": false + }, + "icon": { + "name": "icon", + "type": "text", + "primaryKey": false, + "notNull": false + }, + "short_description": { + "name": "short_description", + "type": "text", + "primaryKey": false, + "notNull": false + }, + "description": { + "name": "description", + "type": "text", + "primaryKey": false, + "notNull": false + }, + "developers": { + "name": "developers", + "type": "jsonb", + "primaryKey": false, + "notNull": false + }, + "publishers": { + "name": "publishers", + "type": "jsonb", + "primaryKey": false, + "notNull": false + }, + "primary_genre": { + "name": "primary_genre", + "type": "text", + "primaryKey": false, + "notNull": false + }, + "genres": { + "name": "genres", + "type": "jsonb", + "primaryKey": false, + "notNull": false + }, + "categories": { + "name": "categories", + "type": "jsonb", + "primaryKey": false, + "notNull": false + }, + "oslist": { + "name": "oslist", + "type": "jsonb", + "primaryKey": false, + "notNull": false + }, + "size_download": { + "name": "size_download", + "type": "bigint", + "primaryKey": false, + "notNull": false + }, + "size_on_disk": { + "name": "size_on_disk", + "type": "bigint", + "primaryKey": false, + "notNull": false + }, + "controller_support": { + "name": "controller_support", + "type": "text", + "primaryKey": false, + "notNull": false + }, + "steam_deck_compat": { + "name": "steam_deck_compat", + "type": "text", + "primaryKey": false, + "notNull": false + }, + "review_score_percent": { + "name": "review_score_percent", 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"time_updated", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": true, + "default": "now()" + }, + "time_deleted": { + "name": "time_deleted", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": false + }, + "user_id": { + "name": "user_id", + "type": "char(30)", + "primaryKey": false, + "notNull": true + }, + "kind": { + "name": "kind", + "type": "verification_kind", + "typeSchema": "public", + "primaryKey": false, + "notNull": true + }, + "code_hash": { + "name": "code_hash", + "type": "text", + "primaryKey": false, + "notNull": true + }, + "expires_at": { + "name": "expires_at", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": true + }, + "attempts": { + "name": "attempts", + "type": "integer", + "primaryKey": false, + "notNull": true, + "default": 0 + }, + "consumed_at": { + "name": "consumed_at", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": false + } + }, + "indexes": { + "verification_user_kind_idx": { + "name": "verification_user_kind_idx", + "columns": [ + { + "expression": "user_id", + "isExpression": false, + "asc": true, + "nulls": "last" + }, + { + "expression": "kind", + "isExpression": false, + "asc": true, + "nulls": "last" + } + ], + "isUnique": false, + "concurrently": false, + "method": "btree", + "with": {} + } + }, + "foreignKeys": { + "verification_user_id_user_id_fk": { + "name": "verification_user_id_user_id_fk", + "tableFrom": "verification", + "tableTo": "user", + "columnsFrom": [ + "user_id" + ], + "columnsTo": [ + "id" + ], + "onDelete": "cascade", + "onUpdate": "no action" + } + }, + "compositePrimaryKeys": {}, + "uniqueConstraints": {}, + "policies": {}, + "checkConstraints": {}, + "isRLSEnabled": false + }, + "public.waitlist_entry": { + "name": "waitlist_entry", + "schema": "", + "columns": { + "id": { + "name": "id", + "type": "char(30)", + "primaryKey": true, + "notNull": true + }, + "time_created": { + "name": "time_created", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": true, + "default": "now()" + }, + "time_updated": { + "name": "time_updated", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": true, + "default": "now()" + }, + "time_deleted": { + "name": "time_deleted", + "type": "timestamp with time zone", + "primaryKey": false, + "notNull": false + }, + "email": { + "name": "email", + "type": "text", + "primaryKey": false, + "notNull": true + }, + "source": { + "name": "source", + "type": "text", + "primaryKey": false, + "notNull": true, + "default": "'machines'" + } + }, + "indexes": { + "waitlist_entry_email_unique": { + "name": "waitlist_entry_email_unique", + "columns": [ + { + "expression": "email", + "isExpression": false, + "asc": true, + "nulls": "last" + } + ], + "isUnique": true, + "concurrently": false, + "method": "btree", + "with": {} + }, + "waitlist_entry_source_idx": { + "name": "waitlist_entry_source_idx", + "columns": [ + { + "expression": "source", + "isExpression": false, + "asc": true, + "nulls": "last" + } + ], + "isUnique": false, + "concurrently": false, + "method": "btree", + "with": {} + } + }, + "foreignKeys": {}, + "compositePrimaryKeys": {}, + "uniqueConstraints": {}, + "policies": {}, + "checkConstraints": {}, + "isRLSEnabled": false + } + }, + "enums": { + "public.box_state": { + "name": "box_state", + "schema": "public", + "values": [ + "created", + "running", + "stopped" + ] + }, + "public.box_tier": { + "name": "box_tier", + "schema": "public", + "values": [ + "xs", + "sm", + "md", + "lg", + "xl" + ] + }, + "public.depot_status": { + "name": "depot_status", + "schema": "public", + "values": [ + "pending", + "downloading", + "complete", + "error", + "deleted" + ] + }, + "public.game_download_status": { + "name": "game_download_status", + "schema": "public", + "values": [ + "pending", + "verifying", + "downloading", + "ready", + "failed" + ] + }, + "public.session_state": { + "name": "session_state", + "schema": "public", + "values": [ + "requested", + "starting", + "live", + "ended", + "failed" + ] + }, + "public.team_member_role": { + "name": "team_member_role", + "schema": "public", + "values": [ + "owner", + "admin", + "member" + ] + }, + "public.linked_account_provider": { + "name": "linked_account_provider", + "schema": "public", + "values": [ + "steam", + "ssh", + "discord" + ] + }, + "public.verification_kind": { + "name": "verification_kind", + "schema": "public", + "values": [ + "email" + ] + } + }, + "schemas": {}, + "sequences": {}, + "roles": {}, + "policies": {}, + "views": {}, + "_meta": { + "columns": {}, + "schemas": {}, + "tables": {} + } +} \ No newline at end of file diff --git a/packages/core/migrations/meta/_journal.json b/packages/core/migrations/meta/_journal.json index b1f7ec6b..ffa36f48 100644 --- a/packages/core/migrations/meta/_journal.json +++ b/packages/core/migrations/meta/_journal.json @@ -57,6 +57,13 @@ "when": 1788460224524, "tag": "0007_box_session_team_notnull", "breakpoints": true + }, + { + "idx": 8, + "version": "7", + "when": 1788547836146, + "tag": "0008_session_one_active_run_per_box", + "breakpoints": true } ] } \ No newline at end of file diff --git a/packages/core/src/session/index.ts b/packages/core/src/session/index.ts index aa3c9061..893da4f1 100644 --- a/packages/core/src/session/index.ts +++ b/packages/core/src/session/index.ts @@ -3,6 +3,7 @@ import z from 'zod'; import { BoxTable, BoxTier } from '../box/box.sql.js'; import { Database } from '../db/index.js'; +import { ErrorCodes, VisibleError } from '../error.js'; import { Examples } from '../examples.js'; import { fn } from '../fn.js'; import { GameTable } from '../game/game.sql.js'; @@ -18,6 +19,15 @@ import { SessionState, SessionTable } from './session.sql.js'; * value once. */ export namespace Session { + /** + * One wording for "that box is busy", however it was discovered. + * + * Both the read in {@link activeForBox} and the unique index behind + * {@link request} report it, and a caller must not be able to tell which, + * because that would only tell it how close the race was. + */ + export const BOX_BUSY = 'That box already has a run that has not stopped'; + export const Info = z .object({ id: z.string().meta({ @@ -41,7 +51,8 @@ export namespace Session { example: Examples.Session.state }), ticket: z.string().nullable().optional().meta({ - description: 'Current iroh connect ticket, or null before neshub mints one', + description: + 'Current connect ticket. Null before one has been minted, and null again once the run has stopped — a run that is not there has no address', example: Examples.Session.ticket }), timeStarted: z.string().nullable().optional().meta({ @@ -83,6 +94,41 @@ export namespace Session { } ); + /** Postgres refusing a second row for the same key. */ + function isUniqueViolation(err: unknown): boolean { + const e = err as { code?: string; cause?: { code?: string } }; + return e?.code === '23505' || e?.cause?.code === '23505'; + } + + /** + * Ask for a run of a box, and let the database refuse a second one. + * + * The same argument as {@link compareAndSetState}, one step earlier. A + * caller reading {@link activeForBox} first and the insert being refused + * are different properties: the read is a nicer error message, the unique + * index is the invariant. Two requests that both read "nothing is running" + * before either inserts each get a row, and the host is then handed the + * same box to start twice — which is exactly what the state claim exists + * to prevent. + * + * The refusal is the same 409 a caller gets from the read, and worded + * identically, because from outside they are the same fact and which one + * answered is a timing detail. + */ + export const request = fn( + Info.pick({ id: true, boxId: true, gameId: true, linkedAccountId: true }), + async (input) => { + try { + return await create(input); + } catch (err) { + if (isUniqueViolation(err)) { + throw new VisibleError('already_exists', ErrorCodes.Validation.INVALID_STATE, BOX_BUSY); + } + throw err; + } + } + ); + export const fromID = fn(Info.shape.id, async (id) => { return Database.use(async (tx) => { return tx @@ -99,9 +145,11 @@ export namespace Session { /** * The run currently occupying a box, if any. * - * Newest first and limited to one: a box has at most one live session by - * construction, and if that ever stops being true this is the query that - * should start refusing rather than picking a winner silently. + * At most one row can match: `session_box_active_unique` is a unique index + * on this exact predicate, so "newest first, limited to one" describes the + * query and not a choice being made. Reading this before inserting gives a + * caller a better message than a constraint violation; it is not what makes + * the answer single. See {@link request}. */ export const activeForBox = fn(Info.shape.boxId, async (boxId) => { return Database.use(async (tx) => { @@ -177,7 +225,12 @@ export namespace Session { ? { timeStarted: sql`coalesce(${SessionTable.timeStarted}, ${now})` } : {}), ...(input.state === 'ended' || input.state === 'failed' - ? { timeStopped: sql`coalesce(${SessionTable.timeStopped}, ${now})` } + ? { + timeStopped: sql`coalesce(${SessionTable.timeStopped}, ${now})`, + // A stopped run has no address, whichever writer + // stopped it. + ticket: null + } : {}) }) .where(and(eq(SessionTable.id, input.id), isNull(SessionTable.timeDeleted))) @@ -395,7 +448,15 @@ export namespace Session { ? { timeStarted: sql`coalesce(${SessionTable.timeStarted}, ${now})` } : {}), ...(input.to === 'ended' || input.to === 'failed' - ? { timeStopped: sql`coalesce(${SessionTable.timeStopped}, ${now})` } + ? { + timeStopped: sql`coalesce(${SessionTable.timeStopped}, ${now})`, + // A stopped run has no address. Publishing one is + // already refused, so keeping the last one would + // leave the only readable ticket for a dead run + // being the one nothing may replace — and a client + // that polls would dial it. + ticket: null + } : {}) }) .where( diff --git a/packages/core/src/session/session.sql.ts b/packages/core/src/session/session.sql.ts index 71b03b9b..9c4c31fc 100644 --- a/packages/core/src/session/session.sql.ts +++ b/packages/core/src/session/session.sql.ts @@ -1,7 +1,8 @@ -import { index, pgEnum, pgTable, text } from 'drizzle-orm/pg-core'; +import { sql } from 'drizzle-orm'; +import { index, pgEnum, pgTable, text, uniqueIndex } from 'drizzle-orm/pg-core'; -import { id, timestamps, ulid, utc } from '../db/types.js'; import { BoxTable } from '../box/box.sql.js'; +import { id, timestamps, ulid, utc } from '../db/types.js'; import { GameTable } from '../game/game.sql.js'; import { LinkedAccountTable } from '../user/linked-account.sql.js'; @@ -66,6 +67,18 @@ export const SessionTable = pgTable( (t) => [ index('session_box_idx').on(t.boxId), index('session_state_idx').on(t.state), + // A box runs one thing at a time, and this is where that is true. + // + // The caller checking first is a nicer error message; it is not the + // invariant. Two requests that both read "nothing is running" before + // either inserts each get a row, and the host is then handed the same + // box to start twice — the identical failure the state claim exists to + // prevent, one step earlier. So the predicate is exactly the one + // `Session.activeForBox` asks about, and the database refuses the + // second row rather than a caller remembering to. + uniqueIndex('session_box_active_unique') + .on(t.boxId) + .where(sql`time_stopped is null and time_deleted is null`), // Metering reads "sessions in this window", and this table is what // billing sums, so the time index is not speculative. ref(d-0048) index('session_started_idx').on(t.timeStarted) diff --git a/packages/core/src/session/session.test.ts b/packages/core/src/session/session.test.ts index d2803a63..4da9c9d5 100644 --- a/packages/core/src/session/session.test.ts +++ b/packages/core/src/session/session.test.ts @@ -58,6 +58,18 @@ afterAll(async () => { } }); +/** A scene with the run already requested. */ +async function requestedRun(label: string, steamAppId: number) { + const s = await scene(label, steamAppId); + const session = await Session.request({ + id: Identifier.ascending('session'), + boxId: s.box.id, + gameId: s.gameId, + linkedAccountId: s.owner.linkedAccountId + }); + return { ...s, session }; +} + describe('Session', () => { test('a session starts requested, with no ticket and no times', async () => { const { owner, box, gameId } = await scene('ses-defaults', 5400); @@ -414,3 +426,107 @@ describe('Session claim', () => { expect((await Session.fromID(session.id))?.ticket).toBeNull(); }); }); + +describe('Session one active run per box', () => { + test('the database refuses a second unstopped run, not just the caller', async () => { + const { owner, machineId, box, gameId } = await scene('ses-one-active', 5450); + const mk = () => + Session.request({ + id: Identifier.ascending('session'), + boxId: box.id, + gameId, + linkedAccountId: owner.linkedAccountId + }); + + const first = await mk(); + expect(first.state).toBe('requested'); + + // The interleaving `POST /session` permits: both callers read + // `activeForBox` and see nothing, then both insert. The read is a + // message; the unique index is the invariant, so the second insert is + // refused rather than producing a row. + const before = await Session.activeForBox(box.id); + expect(before?.id).toBe(first.id); + await expect(mk()).rejects.toThrow(Session.BOX_BUSY); + + expect(await Session.listByBox(box.id)).toHaveLength(1); + // The point of all of it: the host is handed one launch, not two. + expect(await Session.listJobsForMachine(machineId)).toHaveLength(1); + }); + + test('a box that has stopped running is free to run again', async () => { + const { owner, machineId, box, gameId } = await scene('ses-one-active-reuse', 5451); + const mk = () => + Session.request({ + id: Identifier.ascending('session'), + boxId: box.id, + gameId, + linkedAccountId: owner.linkedAccountId + }); + + const first = await mk(); + await Session.transition({ id: first.id, machineId, state: 'starting', errorMessage: null }); + await Session.transition({ id: first.id, machineId, state: 'live', errorMessage: null }); + await Session.transition({ id: first.id, machineId, state: 'ended', errorMessage: null }); + + // The index is partial for exactly this reason: a box is a durable + // thing and playing twice is the ordinary case, so a stopped run must + // not occupy the slot forever. + const second = await mk(); + expect(second.id).not.toBe(first.id); + expect(await Session.listByBox(box.id)).toHaveLength(2); + }); +}); + +describe('Session tickets and the end of a run', () => { + test('stopping a run takes its address away', async () => { + const { machineId, session } = await requestedRun('ses-ticket-cleared', 5452); + await Session.transition({ id: session.id, machineId, state: 'starting', errorMessage: null }); + await Session.transition({ id: session.id, machineId, state: 'live', errorMessage: null }); + expect( + (await Session.publishTicket({ id: session.id, machineId, ticket: 'live-address' })).session + ?.ticket + ).toBe('live-address'); + + const ended = await Session.transition({ + id: session.id, + machineId, + state: 'ended', + errorMessage: null + }); + // Publishing an address for a stopped run is already refused, so a + // kept one would be the only ticket a client can read for a dead run + // and the one nothing is allowed to replace. It would be dialled. + expect(ended.outcome).toBe('moved'); + expect(ended.session?.ticket).toBeNull(); + expect((await Session.fromID(session.id))?.ticket).toBeNull(); + }); + + test('a run that failed does not keep an address either', async () => { + const { machineId, session } = await requestedRun('ses-ticket-cleared-fail', 5453); + await Session.transition({ id: session.id, machineId, state: 'starting', errorMessage: null }); + await Session.publishTicket({ id: session.id, machineId, ticket: 'starting-address' }); + + const failed = await Session.transition({ + id: session.id, + machineId, + state: 'failed', + errorMessage: 'the guest never came up' + }); + expect(failed.session?.ticket).toBeNull(); + // The reason survives; only the address goes. + expect(failed.session?.errorMessage).toBe('the guest never came up'); + }); + + test('the unscoped primitive clears it too, whichever writer stops a run', async () => { + const { session } = await requestedRun('ses-ticket-cleared-setstate', 5454); + await Session.setTicket({ id: session.id, ticket: 'an-address' }); + + const ended = await Session.setState({ + id: session.id, + state: 'ended', + errorMessage: null + }); + expect(ended?.ticket).toBeNull(); + }); +});