Health rest API

Makes a new REST API /orchestrator/v1/health/<ApplicationId> that shows the
list of services that are monitored for health. This information is currently a
bit difficult to infer from
/orchestrator/v1/instances/<ApplicationInstanceReference> since it is the
combined view of health and Slobrok. There are already APIs for Slobrok.

Example content:

$ curl -s localhost:19071/orchestrator/v1/health/hosted-vespa:zone-config-serve\
rs:default|jq .
  {
    "services": [
      {
        "clusterId": "zone-config-servers",
        "serviceType": "configserver",
        "configId": "zone-config-servers/cfg6",
        "status": {
          "serviceStatus": "UP",
          "lastChecked": 1548939111.708718,
          "since": 1548939051.686223,
          "endpoint": "http://cfg4.prod.cd-us-central-1.vespahosted.ne1.yahoo.com:19071/state/v1/health"
        }
      },
      ...
    ]
  }

This view is slightly different from the application model view, just because
that's exactly how the health monitoring is structured (individual monitors
against endpoints).

The "endpoint" information will also be added to /instances if the status comes
from health and not Slobrok.

2 files changed, 39 insertions, 0 deletions

diff --git a/orchestrator-restapi/src/main/java/com/yahoo/vespa/orchestrator/restapi/wire/ApplicationReferenceList.java b/orchestrator-restapi/src/main/java/com/yahoo/vespa/orchestrator/restapi/wire/ApplicationReferenceList.java
new file mode 100644
index 00000000000..c0d7af89bd5
--- /dev/null
+++ b/orchestrator-restapi/src/main/java/com/yahoo/vespa/orchestrator/restapi/wire/ApplicationReferenceList.java
@@ -0,0 +1,21 @@
+// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.vespa.orchestrator.restapi.wire;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * A list of references to applications.
+ *
+ * @author hakonhall
+ */
+@JsonIgnoreProperties(ignoreUnknown = true)
+@JsonInclude(JsonInclude.Include.NON_NULL)
+public class ApplicationReferenceList {
+    @JsonProperty("applications")
+    public List<UrlReference> applicationList = Collections.emptyList();
+}
diff --git a/orchestrator-restapi/src/main/java/com/yahoo/vespa/orchestrator/restapi/wire/UrlReference.java b/orchestrator-restapi/src/main/java/com/yahoo/vespa/orchestrator/restapi/wire/UrlReference.java
new file mode 100644
index 00000000000..6d59b48a1fe
--- /dev/null
+++ b/orchestrator-restapi/src/main/java/com/yahoo/vespa/orchestrator/restapi/wire/UrlReference.java
@@ -0,0 +1,18 @@
+// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.vespa.orchestrator.restapi.wire;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+/**
+ * A reference to a REST resource.
+ *
+ * @author hakonhall
+ */
+@JsonIgnoreProperties(ignoreUnknown = true)
+@JsonInclude(JsonInclude.Include.NON_NULL)
+public class UrlReference {
+    @JsonProperty("url")
+    public String url;
+}