Add a component to run TensorBoard. (#110)

* Add a component to run TensorBoard.

* Autoformate jsonnet file.

* * Set a default of "" for logDir; there's not a really good default location
  because it will depend on where the data is stored.

github_issue_summarization/ks-kubeflow/components/params.libsonnet

@@ -47,6 +47,13 @@
     tensor2tensor: {
       namespace: "null",
     },    
+    tensorboard: {
+      image: "tensorflow/tensorflow:1.7.0",
+      // logDir needs to be overwritten based on where the data is 
+      // actually stored.
+      logDir: "",
+      name: "gh",
+    },
     tfjob: {
       namespace: "null",
     },

github_issue_summarization/ks-kubeflow/components/tensorboard.jsonnet

@@ -0,0 +1,89 @@
+local env = std.extVar("__ksonnet/environments");
+local params = std.extVar("__ksonnet/params").components.tensorboard;
+local k = import "k.libsonnet";
+
+local name = params.name;
+local namespace = env.namespace;
+local service = {
+  apiVersion: "v1",
+  kind: "Service",
+  metadata: {
+    name: name + "-tb",
+    namespace: env.namespace,
+    annotations: {
+      "getambassador.io/config":
+        std.join("\n", [
+          "---",
+          "apiVersion: ambassador/v0",
+          "kind:  Mapping",
+          "name: " + name + "_mapping",
+          "prefix: /tensorboard/" + name + "/",
+          "rewrite: /",
+          "service: " + name + "-tb." + namespace,
+        ]),
+    },  //annotations
+  },
+  spec: {
+    ports: [
+      {
+        name: "http",
+        port: 80,
+        targetPort: 80,
+      },
+    ],
+    selector: {
+      app: "tensorboard",
+      "tb-job": name,
+    },
+  },
+};
+
+local deployment = {
+  apiVersion: "apps/v1beta1",
+  kind: "Deployment",
+  metadata: {
+    name: name + "-tb",
+    namespace: env.namespace,
+  },
+  spec: {
+    replicas: 1,
+    template: {
+      metadata: {
+        labels: {
+          app: "tensorboard",
+          "tb-job": name,
+        },
+        name: name,
+        namespace: namespace,
+      },
+      spec: {
+        containers: [
+          {
+            command: [
+              "/usr/local/bin/tensorboard",
+              "--logdir=" + params.logDir,
+              "--port=80",
+            ],
+            image: params.image,
+            name: "tensorboard",
+            ports: [
+              {
+                containerPort: 80,
+              },
+            ],
+            // "livenessProbe": {
+            //    "httpGet": {
+            //      "path": "/",
+            //      "port": 80
+            //    },
+            //    "initialDelaySeconds": 15,
+            //    "periodSeconds": 3
+            //  }
+          },
+        ],
+      },
+    },
+  },
+};
+
+std.prune(k.core.v1.list.new([service, deployment]))