Add resource providers

conventions/src/main/kotlin/otel.java-conventions.gradle.kts

@@ -136,6 +136,7 @@ testing {
       implementation("org.junit.jupiter:junit-jupiter-params")
       runtimeOnly("org.junit.jupiter:junit-jupiter-engine")
       runtimeOnly("org.junit.vintage:junit-vintage-engine")
+      implementation("org.junit-pioneer:junit-pioneer")
 
 
       implementation("org.assertj:assertj-core")

dependencyManagement/build.gradle.kts

@@ -106,6 +106,7 @@ val DEPENDENCIES = listOf(
   "com.google.code.findbugs:jsr305:3.0.2",
   "org.apache.groovy:groovy:${groovyVersion}",
   "org.apache.groovy:groovy-json:${groovyVersion}",
+  "org.codehaus.mojo:animal-sniffer-annotations:1.22",
   "org.junit-pioneer:junit-pioneer:1.7.1",
   "org.objenesis:objenesis:3.2",
   "org.spockframework:spock-core:2.2-groovy-4.0",

instrumentation/resources/library/README.md

@@ -0,0 +1,62 @@
+# OpenTelemetry Resource Providers
+
+This package includes some standard `ResourceProvider`s for filling in attributes related to
+common environments. Currently, the resources provide the following semantic conventions:
+
+## Populated attributes
+
+### Container
+
+Provider: `io.opentelemetry.instrumentation.resources.ContainerResource`
+
+Specification: https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/resource/semantic_conventions/container.md
+
+Implemented attributes:
+- `container.id`
+
+### Host
+
+Provider: `io.opentelemetry.instrumentation.resources.HostResource`
+
+Specification: https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/resource/semantic_conventions/host.md
+
+Implemented attributes:
+- `host.name`
+- `host.arch`
+
+### Operating System
+
+Provider: `io.opentelemetry.instrumentation.resources.OsResource`
+
+Specification: https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/resource/semantic_conventions/os.md
+
+Implemented attributes:
+- `os.type`
+- `os.description`
+
+### Process
+
+Implementation: `io.opentelemetry.instrumentation.resources.ProcessResource`
+
+Specification: https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/resource/semantic_conventions/process.md#process
+
+Implemented attributes:
+- `process.pid`
+- `process.executable.path` (note, we assume the `java` binary is located in the `bin` subfolder of `JAVA_HOME`)
+- `process.command_line` (note this includes all system properties and arguments when running)
+
+### Java Runtime
+
+Implementation: `io.opentelemetry.instrumentation.resources.ProcessRuntimeResource`
+
+Specification: https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/resource/semantic_conventions/process.md#process-runtimes
+
+Implemented attributes:
+- `process.runtime.name`
+- `process.runtime.version`
+- `process.runtime.description`
+
+## Platforms
+
+This package currently does not run on Android. It has been verified on OpenJDK and should work on
+other server JVM distributions but if you find any issues please let us know.

instrumentation/resources/library/build.gradle.kts

@@ -0,0 +1,64 @@
+plugins {
+  id("otel.library-instrumentation")
+  id("otel.animalsniffer-conventions")
+}
+
+val mrJarVersions = listOf(11)
+
+dependencies {
+  implementation("io.opentelemetry:opentelemetry-sdk-common")
+  implementation("io.opentelemetry:opentelemetry-semconv")
+  implementation("io.opentelemetry:opentelemetry-sdk-extension-autoconfigure-spi")
+
+  compileOnly("org.codehaus.mojo:animal-sniffer-annotations")
+
+  annotationProcessor("com.google.auto.service:auto-service")
+  compileOnly("com.google.auto.service:auto-service-annotations")
+
+  testImplementation("org.junit.jupiter:junit-jupiter-api")
+}
+
+for (version in mrJarVersions) {
+  sourceSets {
+    create("java$version") {
+      java {
+        setSrcDirs(listOf("src/main/java$version"))
+      }
+    }
+  }
+
+  tasks {
+    named<JavaCompile>("compileJava${version}Java") {
+      sourceCompatibility = "$version"
+      targetCompatibility = "$version"
+      options.release.set(version)
+    }
+  }
+
+  configurations {
+    named("java${version}Implementation") {
+      extendsFrom(configurations["implementation"])
+    }
+    named("java${version}CompileOnly") {
+      extendsFrom(configurations["compileOnly"])
+    }
+  }
+
+  dependencies {
+    // Common to reference classes in main sourceset from Java 9 one (e.g., to return a common interface)
+    add("java${version}Implementation", files(sourceSets.main.get().output.classesDirs))
+  }
+}
+
+tasks {
+  withType(Jar::class) {
+    for (version in mrJarVersions) {
+      into("META-INF/versions/$version") {
+        from(sourceSets["java$version"].output)
+      }
+    }
+    manifest.attributes(
+      "Multi-Release" to "true"
+    )
+  }
+}

instrumentation/resources/library/src/main/java/io/opentelemetry/instrumentation/resources/ContainerResource.java

@@ -0,0 +1,122 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.instrumentation.resources;
+
+import io.opentelemetry.api.common.Attributes;
+import io.opentelemetry.api.internal.OtelEncodingUtils;
+import io.opentelemetry.sdk.resources.Resource;
+import io.opentelemetry.semconv.resource.attributes.ResourceAttributes;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.stream.Stream;
+import javax.annotation.Nullable;
+import org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement;
+
+/** Factory for {@link Resource} retrieving Container ID information. */
+public final class ContainerResource {
+
+  private static final Logger logger = Logger.getLogger(ContainerResource.class.getName());
+  private static final String UNIQUE_HOST_NAME_FILE_NAME = "/proc/self/cgroup";
+  private static final Resource INSTANCE = buildSingleton(UNIQUE_HOST_NAME_FILE_NAME);
+
+  @IgnoreJRERequirement
+  private static Resource buildSingleton(String uniqueHostNameFileName) {
+    // can't initialize this statically without running afoul of animalSniffer on paths
+    return buildResource(Paths.get(uniqueHostNameFileName));
+  }
+
+  // package private for testing
+  static Resource buildResource(Path path) {
+    String containerId = extractContainerId(path);
+
+    if (containerId == null || containerId.isEmpty()) {
+      return Resource.empty();
+    } else {
+      return Resource.create(Attributes.of(ResourceAttributes.CONTAINER_ID, containerId));
+    }
+  }
+
+  /** Returns resource with container information. */
+  public static Resource get() {
+    return INSTANCE;
+  }
+
+  /**
+   * Each line of cgroup file looks like "14:name=systemd:/docker/.../... A hex string is expected
+   * inside the last section separated by '/' Each segment of the '/' can contain metadata separated
+   * by either '.' (at beginning) or '-' (at end)
+   *
+   * @return containerId
+   */
+  @IgnoreJRERequirement
+  @Nullable
+  private static String extractContainerId(Path cgroupFilePath) {
+    if (!Files.exists(cgroupFilePath) || !Files.isReadable(cgroupFilePath)) {
+      return null;
+    }
+    try (Stream<String> lines = Files.lines(cgroupFilePath)) {
+      Optional<String> value =
+          lines
+              .filter(line -> !line.isEmpty())
+              .map(ContainerResource::getIdFromLine)
+              .filter(Objects::nonNull)
+              .findFirst();
+      if (value.isPresent()) {
+        return value.get();
+      }
+    } catch (Exception e) {
+      logger.log(Level.WARNING, "Unable to read file", e);
+    }
+    return null;
+  }
+
+  @Nullable
+  private static String getIdFromLine(String line) {
+    // This cgroup output line should have the container id in it
+    int lastSlashIdx = line.lastIndexOf('/');
+    if (lastSlashIdx < 0) {
+      return null;
+    }
+
+    String containerId;
+
+    String lastSection = line.substring(lastSlashIdx + 1);
+    int colonIdx = lastSection.lastIndexOf(':');
+
+    if (colonIdx != -1) {
+      // since containerd v1.5.0+, containerId is divided by the last colon when the cgroupDriver is
+      // systemd:
+      // https://github.com/containerd/containerd/blob/release/1.5/pkg/cri/server/helpers_linux.go#L64
+      containerId = lastSection.substring(colonIdx + 1);
+    } else {
+      int startIdx = lastSection.lastIndexOf('-');
+      int endIdx = lastSection.lastIndexOf('.');
+
+      startIdx = startIdx == -1 ? 0 : startIdx + 1;
+      if (endIdx == -1) {
+        endIdx = lastSection.length();
+      }
+      if (startIdx > endIdx) {
+        return null;
+      }
+
+      containerId = lastSection.substring(startIdx, endIdx);
+    }
+
+    if (OtelEncodingUtils.isValidBase16String(containerId) && !containerId.isEmpty()) {
+      return containerId;
+    } else {
+      return null;
+    }
+  }
+
+  private ContainerResource() {}
+}

instrumentation/resources/library/src/main/java/io/opentelemetry/instrumentation/resources/ContainerResourceProvider.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.instrumentation.resources;
+
+import com.google.auto.service.AutoService;
+import io.opentelemetry.sdk.autoconfigure.spi.ConfigProperties;
+import io.opentelemetry.sdk.autoconfigure.spi.ResourceProvider;
+import io.opentelemetry.sdk.resources.Resource;
+
+/** {@link ResourceProvider} for automatically configuring {@link ResourceProvider}. */
+@AutoService(ResourceProvider.class)
+public class ContainerResourceProvider implements ResourceProvider {
+  @Override
+  public Resource createResource(ConfigProperties config) {
+    return ContainerResource.get();
+  }
+}

instrumentation/resources/library/src/main/java/io/opentelemetry/instrumentation/resources/HostResource.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.instrumentation.resources;
+
+import io.opentelemetry.api.common.Attributes;
+import io.opentelemetry.api.common.AttributesBuilder;
+import io.opentelemetry.sdk.resources.Resource;
+import io.opentelemetry.semconv.resource.attributes.ResourceAttributes;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+
+/** Factory for a {@link Resource} which provides information about the host info. */
+public final class HostResource {
+
+  private static final Resource INSTANCE = buildResource();
+
+  /** Returns a {@link Resource} which provides information about host. */
+  public static Resource get() {
+    return INSTANCE;
+  }
+
+  // Visible for testing
+  static Resource buildResource() {
+    AttributesBuilder attributes = Attributes.builder();
+    try {
+      attributes.put(ResourceAttributes.HOST_NAME, InetAddress.getLocalHost().getHostName());
+    } catch (UnknownHostException e) {
+      // Ignore
+    }
+    String hostArch = null;
+    try {
+      hostArch = System.getProperty("os.arch");
+    } catch (SecurityException t) {
+      // Ignore
+    }
+    if (hostArch != null) {
+      attributes.put(ResourceAttributes.HOST_ARCH, hostArch);
+    }
+
+    return Resource.create(attributes.build(), ResourceAttributes.SCHEMA_URL);
+  }
+
+  private HostResource() {}
+}

instrumentation/resources/library/src/main/java/io/opentelemetry/instrumentation/resources/HostResourceProvider.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.instrumentation.resources;
+
+import com.google.auto.service.AutoService;
+import io.opentelemetry.sdk.autoconfigure.spi.ConfigProperties;
+import io.opentelemetry.sdk.autoconfigure.spi.ResourceProvider;
+import io.opentelemetry.sdk.resources.Resource;
+
+/** {@link ResourceProvider} for automatically configuring {@link HostResource}. */
+@AutoService(ResourceProvider.class)
+public final class HostResourceProvider implements ResourceProvider {
+  @Override
+  public Resource createResource(ConfigProperties config) {
+    return HostResource.get();
+  }
+}