postgres: its handlers, tools and provisioner run in the node's runtime (hq ADR 0198)

The mesh-postgres container goes with its Dockerfile, build bases and bus credential: its three entrypoints are loads of one bundle, given their words as host paths, and psql comes from postgresql-libs instead of the image's apt layer. The seat word is dropped, since a bundle's words cannot carry one and the client treats it as optional.

modules/postgres/Dockerfile

@@ -1,41 +0,0 @@
-# postgres's runtime: the tool runtime, carrying this module's compiled provisioner, tools and
-# event consumer.
-#
-# **Built from this module's own directory and nothing else.** The sdk is in the base image, so
-# nothing is copied out of a neighbouring checkout — which is what lets the mesh build this from a
-# repository and a path (novox/hq ADR 0069) rather than only on a workstation that happens to have
-# the siblings.
-#
-# Two bases, named rather than pinned: the image this is COMPILED in, and the image it RUNS in.
-# They are different images on purpose — the first carries a compiler and the second must not, or
-# every running container would carry one it never invokes. The mesh answers both with the copies it
-# holds, because a fingerprint written here would name one particular copy and no other mesh has it
-# (novox/hq issue 044). Declared in module.json's `build.on`; deliberately no defaults, so a build
-# nobody told stops here and says which module to build first.
-ARG BUILD_BASE
-ARG RUNTIME_BASE
-
-FROM ${BUILD_BASE} AS build
-# Compiled under /app/modules so `@novox/mesh-sdk` resolves upward into the base's own
-# node_modules — the module is compiled against exactly the sdk it will run against.
-WORKDIR /app/modules/postgres
-COPY . .
-# The compiler is invoked by its real path rather than through node_modules/.bin, whose entries are
-# symlinks to a launcher that requires its library relatively — resolved away when the base image
-# was assembled.
-RUN node /app/node_modules/typescript/bin/tsc client.ts index.ts provisioner/index.ts tools/index.ts \
-      --module NodeNext --moduleResolution NodeNext --target ES2022 --outDir dist
-
-FROM ${RUNTIME_BASE}
-# **This module talks to its database through psql, so psql has to be here.** The client is how
-# postgres's provisioner runs DDL — it does not carry a driver — and the runtime base holds only
-# what every module needs.
-RUN apt-get update \
-      && apt-get install -y --no-install-recommends postgresql-client \
-      && rm -rf /var/lib/apt/lists/*
-COPY --from=build /app/modules/postgres/dist /app/modules/postgres/dist
-# What a tool host should load from this module: its event consumer and its tools, which are
-# separate entrypoints because they are loaded by different things. The provisioner is the third,
-# and is not listed here — the declaration names it in the container's `args`, because it is what
-# this module's own container runs. One image, because they are one module and share a client.
-ENV MESH_TOOL_MODULES=/app/modules/postgres/dist/index.js,/app/modules/postgres/dist/tools/index.js,/app/modules/postgres/dist/provisioner/index.js

modules/postgres/module.json

@@ -53,16 +53,9 @@
   },
   "own-secrets": {
     "superuser": "${dir:state}/superuser.secret",
-    "broker": "${dir:mesh-state}/broker",
     "reader": "${dir:state}/reader.secret"
   },
   "resources": [
-    {
-      "id": "mesh-state",
-      "type": "directory",
-      "mode": "0700",
-      "place": "mesh"
-    },
     {
       "id": "state",
       "type": "directory",
@@ -99,45 +92,33 @@
       ]
     },
     {
-      "id": "runtime",
-      "type": "container",
-      "name": "mesh-postgres",
-      "network": "host",
-      "volumes": [
-        "${dir:mesh-state}/broker:/run/secrets/broker:ro",
-        "${dir:grants}:${dir:grants}:ro",
-        "${dir:state}/superuser.secret:/run/secrets/superuser:ro",
-        "${dir:state}/reader.secret:/run/secrets/reader:ro"
-      ],
-      "env": {
-        "MESH_PROVISION_POSTGRES": "postgres://postgres@127.0.0.1:${port:5432}/postgres?sslmode=disable",
-        "MESH_PROVISION_POSTGRES_PORT": "${seat:mesh-store:5432}",
-        "MESH_PROVISION_PASSWORD_FILE": "/run/secrets/superuser",
-        "MESH_BROKER_FILE": "/run/secrets/broker",
-        "MESH_RECEIVES": "${dir:grants}/mesh.json",
-        "MESH_POSTGRES_READER_PASSWORD_FILE": "/run/secrets/reader"
-      },
-      "artifact": "runtime"
+      "id": "client",
+      "type": "package",
+      "package": "postgresql-libs"
     }
   ],
   "build": {
-    "on": [
-      {
-        "arg": "BUILD_BASE",
-        "module": "mesh-tools",
-        "artifact": "build"
-      },
-      {
-        "arg": "RUNTIME_BASE",
-        "module": "mesh-tools",
-        "artifact": "runtime"
-      }
-    ],
     "artifacts": [
       {
-        "name": "runtime",
-        "kind": "image",
-        "from": "Dockerfile"
+        "name": "code",
+        "kind": "bundle",
+        "language": "typescript",
+        "entrypoints": [
+          "index.js",
+          "tools/index.js",
+          "provisioner/index.js"
+        ],
+        "loads": [
+          "index.js",
+          "tools/index.js",
+          "provisioner/index.js"
+        ],
+        "env": {
+          "MESH_PROVISION_POSTGRES": "postgres://postgres@127.0.0.1:${port:5432}/postgres?sslmode=disable",
+          "MESH_PROVISION_PASSWORD_FILE": "${dir:state}/superuser.secret",
+          "MESH_RECEIVES": "${dir:grants}/mesh.json",
+          "MESH_POSTGRES_READER_PASSWORD_FILE": "${dir:state}/reader.secret"
+        }
       }
     ]
   }