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/**
* Copyright 2005-2016 Red Hat, Inc.
*
* Red Hat licenses this file to you under the Apache License, version
* 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
package io.fabric8.kubernetes.jolokia;
import io.fabric8.kubernetes.api.KubernetesHelper;
import io.fabric8.kubernetes.api.model.*;
import io.fabric8.kubernetes.client.DefaultKubernetesClient;
import io.fabric8.kubernetes.client.KubernetesClient;
import io.fabric8.kubernetes.client.internal.SSLUtils;
import io.fabric8.kubernetes.client.utils.URLUtils;
import io.fabric8.utils.Filter;
import io.fabric8.utils.Strings;
import io.fabric8.utils.Systems;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.jolokia.client.BasicAuthenticator;
import org.jolokia.client.J4pClient;
import org.jolokia.client.J4pClientBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;
import javax.net.ssl.SSLContext;
import static io.fabric8.kubernetes.api.KubernetesHelper.getDockerIp;
import static io.fabric8.utils.Objects.assertNotNull;
/**
* Provides simple access to jolokia clients for a cluster
*/
public class JolokiaClients {
private static final transient Logger LOG = LoggerFactory.getLogger(JolokiaClients.class);
private final KubernetesClient kubernetes;
private String user = Systems.getEnvVarOrSystemProperty("JOLOKIA_USER", "JOLOKIA_USER", "admin");
private String password = Systems.getEnvVarOrSystemProperty("JOLOKIA_PASSWORD", "JOLOKIA_PASSWORD", "admin");
/**
* The protocol used by the Jolokia server (http or https).
* It is detected automatically when left empty.
*/
private String protocol = Systems.getEnvVarOrSystemProperty("JOLOKIA_PROTOCOL");
private Filter podFilter = null;
private boolean useKubeProxy = true;
/**
* The authentication mode.
* Autodetected when left empty;
*/
private AuthenticationMode authenticationMode;
public JolokiaClients() {
this(new DefaultKubernetesClient());
}
public JolokiaClients(KubernetesClient kubernetes) {
this.kubernetes = kubernetes;
if (Systems.hasEnvVarOrSystemProperty("JOLOKIA_AUTHENTICATION_MODE")) {
authenticationMode = AuthenticationMode.valueOf(Systems.getEnvVarOrSystemProperty("JOLOKIA_AUTHENTICATION_MODE"));
}
}
public KubernetesClient getKubernetes() {
return kubernetes;
}
/**
* Returns a client for the first working pod for the given replication controller or throws an assertion error if one could not be found
*/
public J4pClient assertClientForReplicationController(String replicationControllerName) {
J4pClient client = clientForReplicationController(replicationControllerName);
assertNotNull(client, "No client for replicationController: " + replicationControllerName);
return client;
}
/**
* Returns a client for the first working pod for the given replication controller or throws an assertion error if one could not be found
*/
public J4pClient assertClientForReplicationController(String replicationControllerName, String namespace) {
J4pClient client = clientForReplicationController(replicationControllerName, namespace);
assertNotNull(client, "No client for replicationController: " + replicationControllerName);
return client;
}
/**
* Returns a client for the first working pod for the given service or throws an assertion error if one could not be found
*/
public J4pClient assertClientForService(String serviceName) {
J4pClient client = clientForService(serviceName);
assertNotNull(client, "No client for service: " + serviceName);
return client;
}
/**
* Returns a client for the first working pod for the given service or throws an assertion error if one could not be found
*/
public J4pClient assertClientForService(String serviceName, String namespace) {
J4pClient client = clientForService(serviceName, namespace);
assertNotNull(client, "No client for service: " + serviceName);
return client;
}
/**
* Returns a client for the first working pod for the given replication controller
*/
public J4pClient clientForReplicationController(ReplicationController replicationController) {
Objects.requireNonNull(replicationController, "ReplicationController");
PodList podList = kubernetes.pods().inNamespace(replicationController.getMetadata().getNamespace()).list();
List items = null;
if (podList != null) {
items = podList.getItems();
}
if (items == null || items.isEmpty()) {
throw new IllegalArgumentException("No pods found for ReplicationController " + KubernetesHelper.summaryText(replicationController));
}
List pods = KubernetesHelper.getPodsForReplicationController(replicationController, items);
return clientForPod(pods);
}
/**
* Returns a client for the first working pod for the given replication controller
*/
public J4pClient clientForReplicationController(String replicationControllerName, String namespace) {
ReplicationController replicationController = requireReplicationController(replicationControllerName, namespace);
return clientForReplicationController(replicationController);
}
/**
* Returns a client for the first working pod for the given replication controller
*/
public J4pClient clientForReplicationController(String replicationControllerName) {
ReplicationController replicationController = kubernetes.replicationControllers().withName(replicationControllerName).get();
Objects.requireNonNull(replicationController, "No ReplicationController found for name: " + replicationControllerName);
return clientForReplicationController(replicationController);
}
/**
* Returns all the clients for the first working pod for the given replication controller
*/
public List clientsForReplicationController(ReplicationController replicationController) {
List pods = KubernetesHelper.getPodsForReplicationController(replicationController, kubernetes.pods().inNamespace(replicationController.getMetadata().getNamespace()).list().getItems());
return clientsForPod(pods);
}
/**
* Returns all the clients for the first working pod for the given replication controller
*/
public List clientsForReplicationController(String replicationControllerName, String namespace) {
ReplicationController replicationController = requireReplicationController(replicationControllerName, namespace);
List pods = KubernetesHelper.getPodsForReplicationController(replicationController,
kubernetes.pods().inNamespace(namespace).list().getItems());
return clientsForPod(pods);
}
/**
* Returns a client for the first working pod for the given service
*/
public J4pClient clientForService(String serviceName, String namespace) {
List pods = KubernetesHelper.getPodsForService(requireService(serviceName, namespace),
kubernetes.pods().inNamespace(namespace).list().getItems());
return clientForPod(pods);
}
/**
* Returns a client for the first working pod for the given service
*/
public J4pClient clientForService(String serviceName) {
List pods = KubernetesHelper.getPodsForService(requireService(serviceName),
kubernetes.pods().list().getItems());
return clientForPod(pods);
}
/**
* Returns a client for the first working pod for the given service
*/
public J4pClient clientForService(Service service) {
List pods = KubernetesHelper.getPodsForService(service, kubernetes.pods().inNamespace(service.getMetadata().getNamespace()).list().getItems());
return clientForPod(pods);
}
/**
* Returns all the clients for the first working pod for the given service
*/
public List clientsForService(String serviceName, String namespace) {
List pods = KubernetesHelper.getPodsForService(requireService(serviceName, namespace),
kubernetes.pods().inNamespace(namespace).list().getItems());
return clientsForPod(pods);
}
/**
* Returns all the clients for the first working pod for the given service
*/
public List clientsForService(String serviceName) {
List pods = KubernetesHelper.getPodsForService(requireService(serviceName),
kubernetes.pods().list().getItems());
return clientsForPod(pods);
}
/**
* Returns all the clients the first working pod for the given service
*/
public List clientsForService(Service service) {
List pods = KubernetesHelper.getPodsForService(service, kubernetes.pods().inNamespace(service.getMetadata().getNamespace()).list().getItems());
return clientsForPod(pods);
}
/**
* Returns a client for the first working pod in the collection
*/
public J4pClient clientForPod(Iterable pods) {
for (Pod pod : pods) {
if (KubernetesHelper.isPodRunning(pod) && filterPod(pod)) {
J4pClient client = clientForPod(pod);
if (client != null) {
return client;
}
}
}
return null;
}
/**
* Returns the clients for the running pods in the collection
*/
public List clientsForPod(Iterable pods) {
List answer = new ArrayList<>();
for (Pod pod : pods) {
if (KubernetesHelper.isPodRunning(pod) && filterPod(pod)) {
J4pClient client = clientForPod(pod);
if (client != null) {
answer.add(client);
}
}
}
return answer;
}
/**
* Strategy method to filter pods before creating clients for them.
*/
protected boolean filterPod(Pod pod) {
if (podFilter != null) {
return podFilter.matches(pod);
} else {
return true;
}
}
/**
* Returns the Jolokia client for the first container in the pod which exposes the jolokia port
*/
public J4pClient clientForPod(Pod pod) {
String host = KubernetesHelper.getHost(pod);
List containers = KubernetesHelper.getContainers(pod);
for (Container container : containers) {
J4pClient jolokia = clientForContainer(host, container, pod);
if (jolokia != null) {
return jolokia;
}
}
return null;
}
/**
* Returns the jolokia client for the given container
*/
public J4pClient clientForContainer(String host, Container container, Pod pod) {
if (container != null) {
List ports = container.getPorts();
for (ContainerPort port : ports) {
Integer containerPort = port.getContainerPort();
if (containerPort != null) {
String name = port.getName();
if (containerPort == 8778 || (Objects.equals("jolokia", name) && containerPort.intValue() > 0)) {
if (useKubeProxy) {
URL masterUrl = getKubernetes().getMasterUrl();
ObjectMeta metadata = pod.getMetadata();
String namespace = metadata.getNamespace();
String podName = metadata.getName();
String jolokiaUrl = URLUtils.join(masterUrl.toString(), "/api/v1/namespaces/" + namespace + "/pods/" + locateJolokiaProtocol() + ":" + podName + ":8778/proxy/jolokia/");
LOG.info("Using jolokia URL: " + jolokiaUrl);
return createJolokiaClient(container, jolokiaUrl);
}
PodStatus currentState = pod.getStatus();
String podIP = currentState.getPodIP();
if (Strings.isNotBlank(podIP)) {
return createJolokiaClientFromHostAndPort(container, podIP, containerPort);
}
Integer hostPort = port.getHostPort();
if (hostPort != null && hasDocker(pod)) {
// if Kubernetes is running locally on a platform which doesn't support docker natively
// then docker containers will be on a different IP so lets check for localhost and
// switch to the docker IP if its available
if (host.equals("localhost") || host.equals("127.0.0.1")) {
String dockerIp = getDockerIp();
if (Strings.isNotBlank(dockerIp)) {
host = dockerIp;
}
}
}
if (Strings.isNotBlank(host)) {
return createJolokiaClientFromHostAndPort(container, host, hostPort);
}
}
}
}
}
return null;
}
protected J4pClient createJolokiaClientFromHostAndPort(Container container, String host, Integer hostPort) {
String jolokiaUrl = locateJolokiaProtocol() + "://" + host + ":" + hostPort + "/jolokia/";
return createJolokiaClient(container, jolokiaUrl);
}
/**
* Returns true if we detect we are running inside docker
*/
protected boolean hasDocker(Pod pod) {
PodStatus currentState = pod.getStatus();
if (currentState != null) {
List containerStatuses = currentState.getContainerStatuses();
/*
ContainerManifest manifest = currentState.getManifest();
if (manifest != null) {
List containers = manifest.getContainers();
for (Container container : containers) {
Number memory = container.getMemory();
if (memory != null && memory.longValue() > 0) {
return true;
}
}
}
*/
/*
Map info = currentState.getInfo();
if (info != null) {
Collection containers = info.values();
for (ContainerStatus container : containers) {
DetailInfo detailInfo = container.get();
if (detailInfo != null) {
Map additionalProperties = detailInfo.getAdditionalProperties();
if (additionalProperties != null) {
if (additionalProperties.containsKey("HostConfig")) {
return true;
}
}
}
}
}
*/
}
return false;
}
public String getUser() {
return user;
}
public void setUser(String user) {
this.user = user;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public boolean isUseKubeProxy() {
return useKubeProxy;
}
public void setUseKubeProxy(boolean useKubeProxy) {
this.useKubeProxy = useKubeProxy;
}
public Filter getPodFilter() {
return podFilter;
}
public void setPodFilter(Filter podFilter) {
this.podFilter = podFilter;
}
public String getProtocol() {
return protocol;
}
public void setProtocol(String protocol) {
this.protocol = protocol;
}
public AuthenticationMode getAuthenticationMode() {
return authenticationMode;
}
public void setAuthenticationMode(AuthenticationMode authenticationMode) {
this.authenticationMode = authenticationMode;
}
protected J4pClient createJolokiaClient(Container container, String jolokiaUrl) {
String name = container.getName();
LOG.debug("Creating jolokia client for : " + name + " at URL: " + jolokiaUrl);
J4pClientBuilder builder = J4pClient.url(jolokiaUrl);
if (useKubeProxy) {
// When using the https proxy, inject the Kubernetes client's SSL context
URL masterUrl = getKubernetes().getMasterUrl();
if (masterUrl != null && masterUrl.toString().startsWith("https")) {
try {
SSLContext sslCtx = SSLUtils.sslContext(kubernetes.getConfiguration());
ConnectionSocketFactory factory = new SSLConnectionSocketFactory(sslCtx);
builder = builder.sslConnectionSocketFactory(factory);
} catch (Exception e) {
LOG.warn("Unable to inject the Kubernetes SSL context into the Jolokia client. Using the default context", e);
}
}
}
AuthenticationMode mode = locateAuthenticationMode();
switch (mode) {
case BEARER:
builder = builder.authenticator(new BearerTokenAuthenticator());
String token = kubernetes.getConfiguration().getOauthToken();
builder = builder.user(token);
break;
case BASIC:
builder = builder.authenticator(new BasicAuthenticator());
if (Strings.isNotBlank(user)) {
builder = builder.user(user);
}
if (Strings.isNotBlank(password)) {
builder = builder.password(password);
}
break;
default:
throw new IllegalStateException("Unsupported authentication mode: " + mode);
}
return builder.build();
}
/**
* Returns the jolokia protocol or detects it from the environment.
*/
protected String locateJolokiaProtocol() {
if (this.protocol != null) {
return protocol;
}
if (KubernetesHelper.isOpenShift(kubernetes)) {
// Jolokia is secured by default on Openshift
return "https";
}
return "http";
}
protected AuthenticationMode locateAuthenticationMode() {
if (this.authenticationMode != null) {
return this.authenticationMode;
}
if (KubernetesHelper.isOpenShift(kubernetes)) {
// Jolokia needs the Bearer token by default on Openshift
return AuthenticationMode.BEARER;
}
return AuthenticationMode.BASIC;
}
protected ReplicationController requireReplicationController(String replicationControllerName, String namespace) {
ReplicationController answer = kubernetes.replicationControllers().inNamespace(namespace).withName(replicationControllerName).get();
Objects.requireNonNull(answer, "No ReplicationController found for namespace: " + namespace + " name: " + replicationControllerName);
return answer;
}
protected Service requireService(String serviceName) {
Service answer = kubernetes.services().withName(serviceName).get();
Objects.requireNonNull(answer, "No Service found for name: " + serviceName);
return answer;
}
protected Service requireService(String serviceName, String namespace) {
Service answer = kubernetes.services().inNamespace(namespace).withName(serviceName).get();
Objects.requireNonNull(answer, "No Service found for namespace: " + namespace + " name: " + serviceName);
return answer;
}
// =================================================================================================
public enum AuthenticationMode {
BASIC,
BEARER
}
}
