Enforce that numRocGdr must be 0 unless numProcs > 1 (#63)

Author: dgrove-oss

tools/pytorchjob-generator/chart/README.md

@@ -50,7 +50,7 @@ customize the Jobs generated by the tool.
 | Key | Type | Default | Description |
 |-----|------|---------|-------------|
 | roceGdrResName | string | nvidia.com/roce_gdr | RoCE GDR resource name (can vary by cluster configuration) |
-| numRoceGdr | integer | `0` | number of nvidia.com/roce_grd resources (0 means disabled; >0 means enable GDR over RoCE). |
+| numRoceGdr | integer | `0` | number of nvidia.com/roce_grd resources (0 means disabled; >0 means enable GDR over RoCE). Must be 0 unless numPods > 1. |
 | topologyFileConfigMap | string | `nil` | Name of configmap containining /var/run/nvidia-topologyd/virtualTopology.xml for the system e.g. nvidia-topo-gdr |
 | ncclGdrEnvConfigMap | string | `nil` | Name of configmap containing NCCL networking environment variables for the system e.g. nccl-netwk-env-vars |
 | multiNicNetworkName | string | `nil` | Name of multi-NIC network, if one is available. Note: when GDR over RoCE is used/available, the RoCE multi-nic network instance should be specified here instead of the TCP multi-nic network instance. Existing instance names can be listed with `oc get multinicnetwork`.  |

tools/pytorchjob-generator/chart/values.schema.json

@@ -79,7 +79,7 @@
             { "type": "null" },
             { "type": "string" }
         ]},
-        "numRoceGdr": { "type": "integer" },
+        "numRoceGdr": { "type": "integer", "minimum": 0, "maximum": 2 },
         "topologyFileConfigMap": { "oneOf": [
             { "type": "null" },
             { "$ref": "#/$defs/rfc1123Label" }
@@ -134,6 +134,17 @@
         "deletionOnFailureGracePeriodDuration" : { "$ref": "#/$defs/duration" }
     },
 
+    "if": {
+        "properties": {
+            "numPods": { "const": 1 }
+        }
+    },
+    "then": {
+        "properties": {
+            "numRoceGdr": { "const": 0 }
+        }
+    },
+
     "$defs": {
         "rfc1123Label": {
             "type": "string",

tools/pytorchjob-generator/chart/values.yaml

@@ -157,7 +157,7 @@ volumes:
 # @section -- Advanced Options
 roceGdrResName: # <optional, default=""> 
 
-# -- (integer) number of nvidia.com/roce_grd resources (0 means disabled; >0 means enable GDR over RoCE).
+# -- (integer) number of nvidia.com/roce_grd resources (0 means disabled; >0 means enable GDR over RoCE). Must be 0 unless numPods > 1.
 # @section -- Advanced Options
 numRoceGdr: 0