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io.engineblock.cli.DockerMetricsHelper Maven / Gradle / Ivy
package io.engineblock.cli;
/*
*
* @author Sebastián Estévez on 4/4/19.
*
*/
import com.github.dockerjava.api.DockerClient;
import com.github.dockerjava.api.command.CreateContainerResponse;
import com.github.dockerjava.api.command.ListContainersCmd;
import com.github.dockerjava.api.command.LogContainerCmd;
import com.github.dockerjava.api.model.*;
import com.github.dockerjava.core.DefaultDockerClientConfig;
import com.github.dockerjava.core.DockerClientConfig;
import com.github.dockerjava.core.DockerClientImpl;
import com.github.dockerjava.core.async.ResultCallbackTemplate;
import com.github.dockerjava.core.command.LogContainerResultCallback;
import com.github.dockerjava.core.command.PullImageResultCallback;
import io.engineblock.util.EngineBlockFiles;
import org.glassfish.jersey.client.authentication.HttpAuthenticationFeature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.ws.rs.client.*;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
public class DockerMetricsHelper {
String userHome = System.getProperty("user.home");
private Client rsClient = ClientBuilder.newClient();
private DockerClientConfig config;
private DockerClient dockerClient;
private Logger logger = LoggerFactory.getLogger(DockerMetricsHelper.class);
public DockerMetricsHelper() {
this.config = DefaultDockerClientConfig.createDefaultConfigBuilder().build();
//this.dockerClient = DockerClientBuilder.getInstance(config).build();
this.dockerClient = DockerClientImpl.getInstance(config);
}
public void startMetrics() {
logger.info("preparing to startg graphite exporter container");
//docker run -d -p 9108:9108 -p 9109:9109 -p 9109:9109/udp prom/graphite-exporter
String GRAPHITE_EXPORTER_IMG = "prom/graphite-exporter";
String tag = "latest";
String name = "graphite-exporter";
//TODO: look into UDP
List port = Arrays.asList(9108, 9109);
List volumeDescList = Arrays.asList();
List envList = Arrays.asList();
String reload = null;
startDocker(GRAPHITE_EXPORTER_IMG, tag, name, port, volumeDescList, envList, null, reload);
logger.info("graphite exporter container started");
logger.info("searching for graphite exporter container ip");
ContainerNetworkSettings settings = searchContainer(name, null).getNetworkSettings();
Map networks = settings.getNetworks();
String ip = null;
for (String key : networks.keySet()) {
ContainerNetwork network = networks.get(key);
ip = network.getIpAddress();
}
logger.info("preparing to start docker metrics");
String PROMETHEUS_IMG = "prom/prometheus";
tag = "v2.4.3";
name = "prom";
port = Arrays.asList(9090);
setupPromFiles(ip);
volumeDescList = Arrays.asList(
//cwd+"/docker-metrics/prometheus:/prometheus",
userHome + "/.prometheus:/etc/prometheus"
//"./prometheus/tg_dse.json:/etc/prometheus/tg_dse.json"
);
envList = null;
List cmdList = Arrays.asList(
"--config.file=/etc/prometheus/prometheus.yml",
"--storage.tsdb.path=/prometheus",
"--storage.tsdb.retention=183d",
"--web.enable-lifecycle"
);
reload = "http://localhost:9090/-/reload";
startDocker(PROMETHEUS_IMG, tag, name, port, volumeDescList, envList, cmdList, reload);
String GRAFANA_IMG = "grafana/grafana";
tag = "5.3.2";
name = "grafana";
port = Arrays.asList(3000);
volumeDescList = Arrays.asList(
//cwd+"/docker-metrics/grafana:/grafana",
//cwd+"/docker-metrics/grafana/datasources:/etc/grafana/provisioning/datasources",
//cwd+"/docker-metrics/grafana/dashboardconf:/etc/grafana/provisioning/dashboards"
//,cwd+"/docker-metrics/grafana/dashboards:/var/lib/grafana/dashboards:ro"
);
envList = Arrays.asList(
"GF_SECURITY_ADMIN_PASSWORD=admin",
"GF_AUTH_ANONYMOUS_ENABLED=\"true\"",
"GF_SNAPSHOTS_EXTERNAL_SNAPSHOT_URL=https://assethub.datastax.com:3001",
"GF_SNAPSHOTS_EXTERNAL_SNAPSHOT_NAME=\"Upload to DataStax\""
);
reload = null;
String containerId = startDocker(GRAFANA_IMG, tag, name, port, volumeDescList, envList, null, reload);
LogContainerResultCallback loggingCallback = new
LogContainerResultCallback();
try {
LogContainerCmd cmd = dockerClient.logContainerCmd(containerId)
.withStdOut(true)
.withFollowStream(true)
.withTailAll();
final boolean[] httpStarted = {false};
cmd.exec(new LogCallback());
loggingCallback.awaitCompletion(10, TimeUnit.SECONDS);
logger.info("grafana container started, http listenning");
configureGrafana();
} catch (InterruptedException e) {
e.printStackTrace();
logger.error("unable to detect grafana start");
}
}
private void setupPromFiles(String ip) {
String datasource = EngineBlockFiles.readFile("docker/prometheus/prometheus.yml");
if (ip == null) {
logger.error("IP for graphite container not found");
System.exit(1);
}
datasource = datasource.replace("!!!GRAPHITE_IP!!!", ip);
new java.io.File(userHome, ".prometheus").mkdir();
try (PrintWriter out = new PrintWriter(
new FileWriter(userHome + "/.prometheus/prometheus.yml", false))) {
out.println(datasource);
} catch (FileNotFoundException e) {
e.printStackTrace();
logger.error("error writing prometheus yaml file to ~/.prometheus");
System.exit(1);
} catch (IOException e) {
e.printStackTrace();
logger.error("creating file in ~/.prometheus");
System.exit(1);
}
}
private void configureGrafana() {
Response response = post("http://localhost:3000/api/dashboards/db", "docker/dashboards/analysis.json", true);
response = post("http://localhost:3000/api/datasources", "docker/datasources/prometheus-datasource.yaml", true);
}
private Response post(String url, String path, boolean auth) {
if (auth) {
HttpAuthenticationFeature feature = HttpAuthenticationFeature.basic("admin", "admin");
rsClient.register(feature);
}
WebTarget webTarget
= rsClient.target(url);
Invocation.Builder invocationBuilder
= webTarget.request(MediaType.APPLICATION_JSON);
Response response;
if (path != null) {
String dashboard = EngineBlockFiles.readFile(path);
response
= invocationBuilder
.post(Entity.entity(dashboard, MediaType.APPLICATION_JSON));
} else {
response
= invocationBuilder
.post(Entity.entity(null, MediaType.APPLICATION_JSON));
}
return response;
}
private String startDocker(String IMG, String tag, String name, List ports, List volumeDescList, List envList, List cmdList, String reload) {
ListContainersCmd listContainersCmd = dockerClient.listContainersCmd().withStatusFilter(List.of("exited"));
listContainersCmd.getFilters().put("name", Arrays.asList(name));
List stoppedContainers = null;
try {
stoppedContainers = listContainersCmd.exec();
for (Container stoppedContainer : stoppedContainers) {
String id = stoppedContainer.getId();
logger.info("Removing exited container: " + id);
dockerClient.removeContainerCmd(id).exec();
}
} catch (Exception e) {
e.printStackTrace();
logger.error("Unable to contact docker, make sure docker is up and try again.");
logger.error("If docker is installed make sure this user has access to the docker group.");
logger.error("$ sudo gpasswd -a ${USER} docker && newgrp docker");
System.exit(1);
}
Container containerId = searchContainer(name, reload);
if (containerId != null) {
return containerId.getId();
}
Info info = dockerClient.infoCmd().exec();
dockerClient.buildImageCmd();
String term = IMG.split("/")[1];
//List dockerSearch = dockerClient.searchImagesCmd(term).exec();
List dockerList = dockerClient.listImagesCmd().withImageNameFilter(IMG).exec();
if (dockerList.size() == 0) {
dockerClient.pullImageCmd(IMG)
.withTag(tag)
.exec(new PullImageResultCallback()).awaitSuccess();
dockerList = dockerClient.listImagesCmd().withImageNameFilter(IMG).exec();
if (dockerList.size() == 0) {
logger.error(String.format("Image %s not found, unable to automatically pull image." +
" Check `docker images`",
IMG));
System.exit(1);
}
}
logger.info("Search returned" + dockerList.toString());
List tcpPorts = new ArrayList<>();
List portBindings = new ArrayList<>();
for (Integer port : ports) {
ExposedPort tcpPort = ExposedPort.tcp(port);
Ports.Binding binding = new Ports.Binding("0.0.0.0", String.valueOf(port));
PortBinding pb = new PortBinding(binding, tcpPort);
tcpPorts.add(tcpPort);
portBindings.add(pb);
}
List volumeList = new ArrayList<>();
List volumeBindList = new ArrayList<>();
for (String volumeDesc : volumeDescList) {
String volFrom = volumeDesc.split(":")[0];
String volTo = volumeDesc.split(":")[1];
Volume vol = new Volume(volTo);
volumeList.add(vol);
volumeBindList.add(new Bind(volFrom, vol));
}
CreateContainerResponse containerResponse;
if (envList == null) {
containerResponse = dockerClient.createContainerCmd(IMG + ":" + tag)
.withCmd(cmdList)
.withExposedPorts(tcpPorts)
.withHostConfig(
new HostConfig()
.withPortBindings(portBindings)
.withPublishAllPorts(true)
.withBinds(volumeBindList)
)
.withName(name)
//.withVolumes(volumeList)
.exec();
} else {
containerResponse = dockerClient.createContainerCmd(IMG + ":" + tag)
.withEnv(envList)
.withExposedPorts(tcpPorts)
.withHostConfig(
new HostConfig()
.withPortBindings(portBindings)
.withPublishAllPorts(true)
.withBinds(volumeBindList)
)
.withName(name)
//.withVolumes(volumeList)
.exec();
}
dockerClient.startContainerCmd(containerResponse.getId()).exec();
return containerResponse.getId();
}
private Container searchContainer(String name, String reload) {
ListContainersCmd listContainersCmd = dockerClient.listContainersCmd().withStatusFilter(List.of("running"));
listContainersCmd.getFilters().put("name", Arrays.asList(name));
List runningContainers = null;
try {
runningContainers = listContainersCmd.exec();
} catch (Exception e) {
e.printStackTrace();
logger.error("Unable to contact docker, make sure docker is up and try again.");
System.exit(1);
}
if (runningContainers.size() >= 1) {
//Container test = runningContainers.get(0);
logger.info(String.format("The container %s is already running", name));
logger.info(String.format("Hupping config"));
if (reload != null) {
post(reload, null, false);
}
return runningContainers.get(0);
}
return null;
}
public void stopMetrics() {
//TODO: maybe implement
}
private class LogCallback extends ResultCallbackTemplate {
@Override
public void onNext(Frame item) {
if (item.toString().contains("HTTP Server Listen")) {
try {
close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
