Revert "Revert "Prepare for making node admin components optional""

6 files changed, 175 insertions, 3 deletions

diff --git a/node-admin/src/main/application/services.xml b/node-admin/src/main/application/services.xml
index 030c42ac8c5..b39a9bce30a 100644
--- a/node-admin/src/main/application/services.xml
+++ b/node-admin/src/main/application/services.xml
@@ -6,7 +6,7 @@
   <handler id="com.yahoo.vespa.hosted.node.admin.restapi.RestApiHandler" bundle="node-admin">
     <binding>http://*/rest/*</binding>
   </handler>
-  <component id="node-admin" class="com.yahoo.vespa.hosted.node.admin.provider.NodeAdminProvider" bundle="node-admin"/>
+  <component id="node-admin" class="com.yahoo.vespa.hosted.node.admin.bootstrap.NodeAdminComponent" bundle="node-admin"/>
   <component id="docker-api" class="com.yahoo.vespa.hosted.dockerapi.DockerImpl" bundle="docker-api"/>
   <component id="metrics-wrapper" class="com.yahoo.vespa.hosted.dockerapi.metrics.MetricReceiverWrapper" bundle="docker-api"/>
 
diff --git a/node-admin/src/main/java/com/yahoo/vespa/hosted/node/admin/bootstrap/NodeAdminComponent.java b/node-admin/src/main/java/com/yahoo/vespa/hosted/node/admin/bootstrap/NodeAdminComponent.java
new file mode 100644
index 00000000000..fbcee36b724
--- /dev/null
+++ b/node-admin/src/main/java/com/yahoo/vespa/hosted/node/admin/bootstrap/NodeAdminComponent.java
@@ -0,0 +1,29 @@
+// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.vespa.hosted.node.admin.bootstrap;
+
+import com.google.inject.Inject;
+import com.yahoo.concurrent.classlock.ClassLocking;
+import com.yahoo.container.di.componentgraph.Provider;
+import com.yahoo.vespa.hosted.dockerapi.Docker;
+import com.yahoo.vespa.hosted.dockerapi.metrics.MetricReceiverWrapper;
+
+public class NodeAdminComponent implements Provider<NodeAdminMain> {
+    private final NodeAdminMain nodeAdminMain;
+
+    @Inject
+    NodeAdminComponent(Docker docker,
+                       MetricReceiverWrapper metricReceiver,
+                       ClassLocking classLocking) {
+        this.nodeAdminMain = new NodeAdminMain(docker, metricReceiver, classLocking);
+    }
+
+    @Override
+    public NodeAdminMain get() {
+        return nodeAdminMain;
+    }
+
+    @Override
+    public void deconstruct() {
+        nodeAdminMain.close();
+    }
+}
diff --git a/node-admin/src/main/java/com/yahoo/vespa/hosted/node/admin/bootstrap/NodeAdminConfig.java b/node-admin/src/main/java/com/yahoo/vespa/hosted/node/admin/bootstrap/NodeAdminConfig.java
new file mode 100644
index 00000000000..f8d5962fc3f
--- /dev/null
+++ b/node-admin/src/main/java/com/yahoo/vespa/hosted/node/admin/bootstrap/NodeAdminConfig.java
@@ -0,0 +1,26 @@
+// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.vespa.hosted.node.admin.bootstrap;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+@JsonIgnoreProperties(ignoreUnknown = true)
+@JsonInclude(value = JsonInclude.Include.NON_NULL)
+public class NodeAdminConfig {
+    private static final ObjectMapper mapper = new ObjectMapper();
+
+    enum Mode {
+        TENANT,
+        CONFIG_SERVER_HOST
+    }
+
+    @JsonProperty("mode")
+    public Mode mode = Mode.TENANT;
+
+    public static NodeAdminConfig get() {
+        // TODO: Get config from file
+        return new NodeAdminConfig();
+    }
+}
diff --git a/node-admin/src/main/java/com/yahoo/vespa/hosted/node/admin/bootstrap/NodeAdminMain.java b/node-admin/src/main/java/com/yahoo/vespa/hosted/node/admin/bootstrap/NodeAdminMain.java
new file mode 100644
index 00000000000..87c3f5452ed
--- /dev/null
+++ b/node-admin/src/main/java/com/yahoo/vespa/hosted/node/admin/bootstrap/NodeAdminMain.java
@@ -0,0 +1,113 @@
+// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.vespa.hosted.node.admin.bootstrap;
+
+import com.yahoo.concurrent.classlock.ClassLocking;
+import com.yahoo.net.HostName;
+import com.yahoo.system.ProcessExecuter;
+import com.yahoo.vespa.hosted.dockerapi.Docker;
+import com.yahoo.vespa.hosted.dockerapi.metrics.MetricReceiverWrapper;
+import com.yahoo.vespa.hosted.node.admin.docker.DockerOperations;
+import com.yahoo.vespa.hosted.node.admin.docker.DockerOperationsImpl;
+import com.yahoo.vespa.hosted.node.admin.maintenance.StorageMaintainer;
+import com.yahoo.vespa.hosted.node.admin.maintenance.acl.AclMaintainer;
+import com.yahoo.vespa.hosted.node.admin.nodeadmin.NodeAdmin;
+import com.yahoo.vespa.hosted.node.admin.nodeadmin.NodeAdminImpl;
+import com.yahoo.vespa.hosted.node.admin.nodeadmin.NodeAdminStateUpdater;
+import com.yahoo.vespa.hosted.node.admin.nodeagent.NodeAgent;
+import com.yahoo.vespa.hosted.node.admin.nodeagent.NodeAgentImpl;
+import com.yahoo.vespa.hosted.node.admin.noderepository.NodeRepository;
+import com.yahoo.vespa.hosted.node.admin.noderepository.NodeRepositoryImpl;
+import com.yahoo.vespa.hosted.node.admin.orchestrator.Orchestrator;
+import com.yahoo.vespa.hosted.node.admin.orchestrator.OrchestratorImpl;
+import com.yahoo.vespa.hosted.node.admin.util.ConfigServerHttpRequestExecutor;
+import com.yahoo.vespa.hosted.node.admin.util.Environment;
+
+import java.time.Clock;
+import java.time.Duration;
+import java.util.function.Function;
+
+/**
+ * NodeAdminMain is the main component of the node admin JDisc application:
+ *  - It will read config and check its environment to figure out its responsibilities
+ *  - It will "start" (only) the necessary components.
+ *  - Other components MUST NOT try to start (typically in constructor) since the features
+ *    they provide is NOT WANTED and possibly destructive, and/or the environment may be
+ *    incompatible. For instance, trying to contact the Docker daemon too early will
+ *    be fatal: the node admin may not have installed and started the docker daemon.
+ */
+public class NodeAdminMain implements AutoCloseable {
+    private static final Duration NODE_AGENT_SCAN_INTERVAL = Duration.ofSeconds(30);
+    private static final Duration NODE_ADMIN_CONVERGE_STATE_INTERVAL = Duration.ofSeconds(30);
+
+    private final Docker docker;
+    private final MetricReceiverWrapper metricReceiver;
+    private final ClassLocking classLocking;
+
+    private NodeAdminStateUpdater nodeAdminStateUpdater;
+
+    NodeAdminMain(Docker docker, MetricReceiverWrapper metricReceiver, ClassLocking classLocking) {
+        this.docker = docker;
+        this.metricReceiver = metricReceiver;
+        this.classLocking = classLocking;
+        start();
+    }
+
+    @Override
+    public void close() {
+        nodeAdminStateUpdater.stop();
+    }
+
+    public NodeAdminStateUpdater getNodeAdminStateUpdater() {
+        return nodeAdminStateUpdater;
+    }
+
+    public void start() {
+        NodeAdminConfig config = NodeAdminConfig.get();
+
+        switch (config.mode) {
+            case TENANT:
+                setupTenantHostNodeAdmin();
+                break;
+            case CONFIG_SERVER_HOST:
+                setupConfigServerHostNodeAdmin();
+                break;
+            default:
+                throw new IllegalStateException(
+                        "Unknown bootstrap mode: " + config.mode.name());
+        }
+    }
+
+    private void setupTenantHostNodeAdmin() {
+        Clock clock = Clock.systemUTC();
+        String dockerHostHostName = HostName.getLocalhost();
+        ProcessExecuter processExecuter = new ProcessExecuter();
+        Environment environment = new Environment();
+
+        ConfigServerHttpRequestExecutor requestExecutor = ConfigServerHttpRequestExecutor.create(environment.getConfigServerUris());
+        NodeRepository nodeRepository = new NodeRepositoryImpl(requestExecutor);
+        Orchestrator orchestrator = new OrchestratorImpl(requestExecutor);
+        DockerOperations dockerOperations = new DockerOperationsImpl(docker, environment, processExecuter);
+
+        StorageMaintainer storageMaintainer = new StorageMaintainer(docker, processExecuter, metricReceiver, environment, clock);
+        AclMaintainer aclMaintainer = new AclMaintainer(dockerOperations, nodeRepository, dockerHostHostName);
+
+        Function<String, NodeAgent> nodeAgentFactory =
+                (hostName) -> new NodeAgentImpl(hostName, nodeRepository, orchestrator, dockerOperations,
+                        storageMaintainer, aclMaintainer, environment, clock, NODE_AGENT_SCAN_INTERVAL);
+        NodeAdmin nodeAdmin = new NodeAdminImpl(dockerOperations, nodeAgentFactory, storageMaintainer, aclMaintainer,
+                metricReceiver, clock);
+
+        nodeAdminStateUpdater = new NodeAdminStateUpdater(nodeRepository, orchestrator, storageMaintainer, nodeAdmin,
+                dockerHostHostName, clock, NODE_ADMIN_CONVERGE_STATE_INTERVAL, classLocking);
+
+        nodeAdminStateUpdater.start();
+    }
+
+    private void setupConfigServerHostNodeAdmin() {
+        // TODO:
+        //  - install and start docker daemon
+        //  - Read config that specifies which containers to start how
+        //  - use thin static backends for node repo, orchestrator, and others
+        //  - Start core node admin.
+    }
+}
diff --git a/node-admin/src/main/java/com/yahoo/vespa/hosted/node/admin/restapi/RestApiHandler.java b/node-admin/src/main/java/com/yahoo/vespa/hosted/node/admin/restapi/RestApiHandler.java
index 42b36d95374..b7377ff172c 100644
--- a/node-admin/src/main/java/com/yahoo/vespa/hosted/node/admin/restapi/RestApiHandler.java
+++ b/node-admin/src/main/java/com/yahoo/vespa/hosted/node/admin/restapi/RestApiHandler.java
@@ -9,6 +9,7 @@ import com.yahoo.container.jdisc.LoggingRequestHandler;
 import com.yahoo.container.logging.AccessLog;
 import com.yahoo.vespa.hosted.dockerapi.metrics.DimensionMetrics;
 import com.yahoo.vespa.hosted.dockerapi.metrics.MetricReceiverWrapper;
+import com.yahoo.vespa.hosted.node.admin.bootstrap.NodeAdminMain;
 import com.yahoo.vespa.hosted.node.admin.nodeadmin.NodeAdminStateUpdater;
 
 import javax.inject.Inject;
@@ -38,10 +39,10 @@ public class RestApiHandler extends LoggingRequestHandler{
 
     @Inject
     public RestApiHandler(Executor executor, AccessLog accessLog,
-                          NodeAdminStateUpdater nodeAdminStateUpdater,
+                          NodeAdminMain nodeAdminMain,
                           MetricReceiverWrapper metricReceiverWrapper) {
         super(executor, accessLog);
-        this.refresher = nodeAdminStateUpdater;
+        this.refresher = nodeAdminMain.getNodeAdminStateUpdater();
         this.metricReceiverWrapper = metricReceiverWrapper;
     }
 
diff --git a/node-admin/src/test/java/com/yahoo/vespa/hosted/node/admin/integrationTests/DockerMock.java b/node-admin/src/test/java/com/yahoo/vespa/hosted/node/admin/integrationTests/DockerMock.java
index a1cc1850d23..7a5d713936d 100644
--- a/node-admin/src/test/java/com/yahoo/vespa/hosted/node/admin/integrationTests/DockerMock.java
+++ b/node-admin/src/test/java/com/yahoo/vespa/hosted/node/admin/integrationTests/DockerMock.java
@@ -33,6 +33,9 @@ public class DockerMock implements Docker {
     }
 
     @Override
+    public void start() { }
+
+    @Override
     public CreateContainerCommand createContainerCommand(
             DockerImage dockerImage,
             ContainerResources containerResources,