Add the condition keeper, mesh-conditions, so conditions are raised and cleared from the observers' findings without the controller's lease, held while their module is delivered, and switched only on the operator's take-over (issue 1952 C1-C8, ADR 0564)

modules/mesh-conditions/module.json

@@ -0,0 +1,84 @@
+{
+  "module": "mesh-conditions",
+  "version": "1",
+  "runs-as": "mesh-conditions",
+  "claims": [
+    {
+      "name": "mesh-conditions",
+      "scope": "mesh",
+      "serves": [
+        "conditions",
+        "silence",
+        "compare",
+        "take-over",
+        "hand-back",
+        "resync"
+      ]
+    }
+  ],
+  "uses": [
+    "operator-channel"
+  ],
+  "reads": [
+    "mesh-delivery-watchman.findings",
+    "mesh-self-check.findings",
+    "mesh-healers.findings",
+    "mesh-delivery-assigner.findings",
+    "mesh-healers.attempts",
+    "mesh-controller.conditions",
+    "mesh-controller.lease",
+    "mesh-delivery-assigner.wants",
+    "node-engine.have"
+  ],
+  "state": [
+    "conditions",
+    {
+      "name": "history",
+      "ttl-seconds": 7776000
+    },
+    "takeover",
+    "held",
+    {
+      "name": "bounds",
+      "ttl-seconds": 900,
+      "key-ttl": true
+    },
+    "asked"
+  ],
+  "own-secrets": {
+    "broker": "${dir:state}/broker"
+  },
+  "secrets-owner": "mesh-conditions",
+  "resources": [
+    {
+      "id": "account",
+      "type": "user",
+      "name": "mesh-conditions",
+      "shell": "/usr/bin/nologin",
+      "home": "/var/lib/mesh-conditions"
+    },
+    {
+      "id": "state",
+      "type": "directory",
+      "mode": "0700",
+      "owner": "mesh-conditions",
+      "place": ".",
+      "unknown": "program"
+    }
+  ],
+  "build": {
+    "artifacts": [
+      {
+        "name": "tools",
+        "kind": "bundle",
+        "language": "go",
+        "system": "arch",
+        "from": "cmd/mesh-conditions",
+        "binary": "mesh-conditions",
+        "loads": [
+          "mesh-conditions"
+        ]
+      }
+    ]
+  }
+}