Add support for Kubernetes arbitrary node selector

bin/cml/runner/launch.js

@@ -135,6 +135,7 @@ const runCloud = async (opts) => {
       cloudStartupScript: startupScript,
       cloudAwsSecurityGroup: awsSecurityGroup,
       cloudAwsSubnet: awsSubnet,
+      cloudKubernetesNodeSelector: kubernetesNodeSelector,
       cloudImage: image,
       workdir
     } = opts;
@@ -172,6 +173,7 @@ const runCloud = async (opts) => {
       startupScript,
       awsSecurityGroup,
       awsSubnet,
+      kubernetesNodeSelector,
       image,
       dockerVolumes
     });
@@ -216,7 +218,8 @@ const runCloud = async (opts) => {
           single: attributes.single,
           spot: attributes.spot,
           spotPrice: attributes.spot_price,
-          timeouts: attributes.timeouts
+          timeouts: attributes.timeouts,
+          kubernetesNodeSelector: attributes.kubernetes_node_selector
         };
         winston.info(JSON.stringify(nonSensitiveValues));
       }
@@ -588,6 +591,17 @@ exports.options = kebabcaseKeys({
     description: 'Specifies the subnet to use within AWS',
     alias: 'cloud-aws-subnet-id'
   },
+  cloudKubernetesNodeSelector: {
+    type: 'array',
+    string: true,
+    default: [],
+    coerce: (items) => {
+      const keyValuePairs = items.map((item) => [...item.split(/=(.+)/), null]);
+      return Object.fromEntries(keyValuePairs);
+    },
+    description:
+      'Key Value pairs to specify the node selector to use within Kubernetes i.e. tags/labels "key=value". If not provided a default "accelerator=infer" key pair will be used'
+  },
   cloudImage: {
     type: 'string',
     description: 'Custom machine/container image',

src/terraform.js

@@ -115,7 +115,10 @@ const iterativeCmlRunnerTpl = (opts = {}) => {
           ...(opts.sshPrivate && { ssh_private: opts.sshPrivate }),
           ...(opts.startupScript && { startup_script: opts.startupScript }),
           ...(opts.token && { token: opts.token }),
-          ...(opts.type && { instance_type: opts.type })
+          ...(opts.type && { instance_type: opts.type }),
+          ...(opts.kubernetesNodeSelector && {
+            kubernetes_node_selector: opts.kubernetesNodeSelector
+          })
         }
       }
     }

src/terraform.test.js

@@ -209,6 +209,71 @@ describe('Terraform tests', () => {
     `);
   });
 
+  test('basic settings with kubernetes node selector', async () => {
+    const output = iterativeCmlRunnerTpl({
+      repo: 'https://',
+      token: 'abc',
+      driver: 'gitlab',
+      labels: 'mylabel',
+      idleTimeout: 300,
+      name: 'myrunner',
+      single: true,
+      cloud: 'aws',
+      region: 'west',
+      type: 'mymachinetype',
+      gpu: 'mygputype',
+      hddSize: 50,
+      sshPrivate: 'myprivate',
+      spot: true,
+      spotPrice: '0.0001',
+      kubernetesNodeSelector: {
+        accelerator: 'infer',
+        ram: null,
+        'disk type': 'hard drives'
+      }
+    });
+    expect(JSON.stringify(output, null, 2)).toMatchInlineSnapshot(`
+      "{
+        \\"terraform\\": {
+          \\"required_providers\\": {
+            \\"iterative\\": {
+              \\"source\\": \\"iterative/iterative\\"
+            }
+          }
+        },
+        \\"provider\\": {
+          \\"iterative\\": {}
+        },
+        \\"resource\\": {
+          \\"iterative_cml_runner\\": {
+            \\"runner\\": {
+              \\"cloud\\": \\"aws\\",
+              \\"driver\\": \\"gitlab\\",
+              \\"instance_gpu\\": \\"mygputype\\",
+              \\"instance_hdd_size\\": 50,
+              \\"idle_timeout\\": 300,
+              \\"labels\\": \\"mylabel\\",
+              \\"name\\": \\"myrunner\\",
+              \\"region\\": \\"west\\",
+              \\"repo\\": \\"https://\\",
+              \\"single\\": true,
+              \\"spot\\": true,
+              \\"spot_price\\": \\"0.0001\\",
+              \\"ssh_private\\": \\"myprivate\\",
+              \\"token\\": \\"abc\\",
+              \\"instance_type\\": \\"mymachinetype\\",
+              \\"kubernetes_node_selector\\": {
+                \\"accelerator\\": \\"infer\\",
+                \\"ram\\": null,
+                \\"disk type\\": \\"hard drives\\"
+              }
+            }
+          }
+        }
+      }"
+    `);
+  });
+
   test('basic settings with docker volumes', async () => {
     const output = iterativeCmlRunnerTpl({
       repo: 'https://',