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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.provision.restapi.v2;
import com.yahoo.config.provision.HostFilter;
import com.yahoo.container.jdisc.HttpRequest;
import com.yahoo.container.jdisc.HttpResponse;
import com.yahoo.container.jdisc.LoggingRequestHandler;
import com.yahoo.container.logging.AccessLog;
import com.yahoo.io.IOUtils;
import com.yahoo.slime.ArrayTraverser;
import com.yahoo.slime.Inspector;
import com.yahoo.slime.Slime;
import com.yahoo.vespa.config.SlimeUtils;
import com.yahoo.vespa.hosted.provision.Node;
import com.yahoo.vespa.hosted.provision.NodeRepository;
import com.yahoo.vespa.hosted.provision.node.Configuration;
import com.yahoo.vespa.hosted.provision.node.NodeFlavors;
import com.yahoo.vespa.hosted.provision.node.filter.ApplicationFilter;
import com.yahoo.vespa.hosted.provision.node.filter.NodeFilter;
import com.yahoo.vespa.hosted.provision.node.filter.NodeHostFilter;
import com.yahoo.vespa.hosted.provision.node.filter.ParentHostFilter;
import com.yahoo.vespa.hosted.provision.node.filter.StateFilter;
import com.yahoo.vespa.hosted.provision.restapi.v2.NodesResponse.ResponseType;
import com.yahoo.yolean.Exceptions;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.Executor;
import java.util.logging.Level;
import static com.yahoo.vespa.config.SlimeUtils.optionalString;
/**
* The implementation of the /state/v2 API.
* See RestApiTest for documentation.
*
* @author bratseth
*/
public class NodesApiHandler extends LoggingRequestHandler {
private final NodeRepository nodeRepository;
private final NodeFlavors nodeFlavors;
private static final String nodeTypeKey = "type";
public NodesApiHandler(Executor executor, AccessLog accessLog, NodeRepository nodeRepository, NodeFlavors flavors) {
super(executor, accessLog);
this.nodeRepository = nodeRepository;
this.nodeFlavors = flavors;
}
@Override
public HttpResponse handle(HttpRequest request) {
try {
switch (request.getMethod()) {
case GET: return handleGET(request);
case PUT: return handlePUT(request);
case POST: return isPatchOverride(request) ? handlePATCH(request) : handlePOST(request);
case DELETE: return handleDELETE(request);
case PATCH: return handlePATCH(request);
default: return ErrorResponse.methodNotAllowed("Method '" + request.getMethod() + "' is not supported");
}
}
catch (NotFoundException e) {
return ErrorResponse.notFoundError(Exceptions.toMessageString(e));
}
catch (IllegalArgumentException e) {
return ErrorResponse.badRequest(Exceptions.toMessageString(e));
}
catch (RuntimeException e) {
e.printStackTrace();
log.log(Level.WARNING, "Unexpected error handling '" + request.getUri() + "'", e);
return ErrorResponse.internalServerError(Exceptions.toMessageString(e));
}
}
private HttpResponse handleGET(HttpRequest request) {
String path = request.getUri().getPath();
if (path.equals( "/nodes/v2/")) return ResourcesResponse.fromStrings(request.getUri(), "state", "node", "command");
if (path.equals( "/nodes/v2/node/")) return new NodesResponse(ResponseType.nodeList, request, nodeRepository);
if (path.startsWith("/nodes/v2/node/")) return new NodesResponse(ResponseType.singleNode, request, nodeRepository);
if (path.equals( "/nodes/v2/state/")) return new NodesResponse(ResponseType.stateList, request, nodeRepository);
if (path.startsWith("/nodes/v2/state/")) return new NodesResponse(ResponseType.nodesInStateList, request, nodeRepository);
if (path.equals( "/nodes/v2/command/")) return ResourcesResponse.fromStrings(request.getUri(), "restart", "reboot");
return ErrorResponse.notFoundError("Nothing at path '" + request.getUri().getPath() + "'");
}
private HttpResponse handlePUT(HttpRequest request) {
String path = request.getUri().getPath();
// Check paths to disallow illegal state changes
if (path.startsWith("/nodes/v2/state/ready/")) {
return new MessageResponse(setNodeReady(path));
}
else if (path.startsWith("/nodes/v2/state/failed/")) {
nodeRepository.fail(lastElement(path));
return new MessageResponse("Moved " + lastElement(path) + " to failed");
}
else if (path.startsWith("/nodes/v2/state/dirty/")) {
nodeRepository.deallocate(lastElement(path));
return new MessageResponse("Moved " + lastElement(path) + " to dirty");
}
else if (path.startsWith("/nodes/v2/state/active/")) {
nodeRepository.unfail(lastElement(path));
return new MessageResponse("Moved " + lastElement(path) + " to active");
}
else {
return ErrorResponse.notFoundError("Cannot put to path '" + request.getUri().getPath() + "'");
}
}
private HttpResponse handlePATCH(HttpRequest request) {
String path = request.getUri().getPath();
if ( ! path.startsWith("/nodes/v2/node/")) return ErrorResponse.notFoundError("Nothing at '" + path + "'");
Node node = nodeFromRequest(request);
nodeRepository.write(new NodePatcher(nodeFlavors, request.getData(), node).apply());
return new MessageResponse("Updated " + node.hostname());
}
private HttpResponse handlePOST(HttpRequest request) {
switch (request.getUri().getPath()) {
case "/nodes/v2/command/restart" :
int restartCount = nodeRepository.restart(toNodeFilter(request)).size();
return new MessageResponse("Scheduled restart of " + restartCount + " matching nodes");
case "/nodes/v2/command/reboot" :
int rebootCount = nodeRepository.reboot(toNodeFilter(request)).size();
return new MessageResponse("Scheduled reboot of " + rebootCount + " matching nodes");
case "/nodes/v2/node" :
int addedNodes = addNodes(request.getData());
return new MessageResponse("Added " + addedNodes + " nodes to the provisioned state");
default:
return ErrorResponse.notFoundError("Nothing at path '" + request.getUri().getPath() + "'");
}
}
private HttpResponse handleDELETE(HttpRequest request) {
String path = request.getUri().getPath();
if (path.startsWith("/nodes/v2/node/")) {
String hostname = lastElement(path);
if (nodeRepository.remove(hostname))
return new MessageResponse("Removed " + hostname);
else
return ErrorResponse.notFoundError("No node in the failed state with hostname " + hostname);
}
else {
return ErrorResponse.notFoundError("Nothing at path '" + request.getUri().getPath() + "'");
}
}
private Node nodeFromRequest(HttpRequest request) {
// TODO: The next 4 lines can be a oneliner when updateNodeAttribute is removed (as we won't allow path suffixes)
String path = request.getUri().getPath();
String prefixString = "/nodes/v2/node/";
int beginIndex = path.indexOf(prefixString) + prefixString.length();
int endIndex = path.indexOf("/", beginIndex);
if (endIndex < 0) endIndex = path.length(); // path ends by ip
String hostname = path.substring(beginIndex, endIndex);
Optional<Node> node = nodeRepository.getNode(hostname);
if ( ! node.isPresent()) throw new NotFoundException("No node found with hostname " + hostname);
return node.get();
}
public int addNodes(InputStream jsonStream) {
List<Node> nodes = createNodesFromSlime(getSlimeFromInputStream(jsonStream).get());
return nodeRepository.addNodes(nodes).size();
}
private static Slime getSlimeFromInputStream(InputStream jsonStream) {
try {
byte[] jsonBytes = IOUtils.readBytes(jsonStream, 1000 * 1000);
return SlimeUtils.jsonToSlime(jsonBytes);
} catch (IOException e) {
throw new RuntimeException();
}
}
private List<Node> createNodesFromSlime(Inspector object) {
List<Node> nodes = new ArrayList<>();
object.traverse((ArrayTraverser) (int i, Inspector item) -> nodes.add(createNode(item)));
return nodes;
}
private Node createNode(Inspector inspector) {
Optional<String> parentHostname = optionalString(inspector.field("parentHostname"));
return nodeRepository.createNode(
inspector.field("openStackId").asString(),
inspector.field("hostname").asString(),
parentHostname,
new Configuration(nodeFlavors.getFlavorOrThrow(inspector.field("flavor").asString())),
nodeTypeFromSlime(inspector.field(nodeTypeKey)));
}
private Node.Type nodeTypeFromSlime(Inspector object) {
// TODO: Remove this when 6.13 is deployed everywhere.
if (! object.valid()) {
return Node.Type.tenant;
}
String typeString = object.asString();
switch (typeString) {
case "tenant" : return Node.Type.tenant;
case "host" : return Node.Type.host;
}
// TODO: Change this to throw an exception when 6.13 is deployed everywhere.
return Node.Type.tenant;
}
// TODO: Move most of this to node repo
public String setNodeReady(String path) {
String hostname = lastElement(path);
if ( nodeRepository.getNode(Node.State.ready, hostname).isPresent())
return "Nothing done; " + hostname + " is already ready";
Optional<Node> node = nodeRepository.getNode(Node.State.provisioned, hostname);
if ( ! node.isPresent())
node = nodeRepository.getNode(Node.State.dirty, hostname);
if ( ! node.isPresent())
node = nodeRepository.getNode(Node.State.failed, hostname);
if ( ! node.isPresent())
throw new IllegalArgumentException("Could not set " + hostname + " ready: Not registered as provisioned, dirty or failed");
nodeRepository.setReady(Collections.singletonList(node.get()));
return "Moved " + hostname + " to ready";
}
public static NodeFilter toNodeFilter(HttpRequest request) {
NodeFilter filter = NodeHostFilter.from(HostFilter.from(request.getProperty("hostname"),
request.getProperty("flavor"),
request.getProperty("clusterType"),
request.getProperty("clusterId")));
filter = ApplicationFilter.from(request.getProperty("application"), filter);
filter = StateFilter.from(request.getProperty("state"), filter);
filter = ParentHostFilter.from(request.getProperty("parentHost"), filter);
return filter;
}
private String lastElement(String path) {
if (path.endsWith("/"))
path = path.substring(0, path.length()-1);
int lastSlash = path.lastIndexOf("/");
if (lastSlash < 0) return path;
return path.substring(lastSlash + 1, path.length());
}
private boolean isPatchOverride(HttpRequest request) {
//Since Jersey's HttpUrlConnector does not support PATCH we support this by override this on POST requests.
String override = request.getHeader("X-HTTP-Method-Override");
if (override != null) {
if (override.equals("PATCH")) {
return true;
} else {
String msg = String.format("Illegal X-HTTP-Method-Override header for POST request. Accepts 'PATCH' but got '%s'", override);
throw new IllegalArgumentException(msg);
}
}
return false;
}
}
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