Add instructions for Java app servers (#3459)

Co-authored-by: Patrice Chalin <chalin@users.noreply.github.com>
Co-authored-by: Severin Neumann <severin.neumann@altmuehlnet.de>
Co-authored-by: opentelemetrybot <107717825+opentelemetrybot@users.noreply.github.com>

content/en/docs/languages/java/automatic/server-config.md

@@ -0,0 +1,163 @@
+---
+title: Application server configuration
+linkTitle: App server config
+description: Learn how to define agent paths for Java application servers
+weight: 15
+cSpell:ignore: asadmin binsetenv binstart Glassfish Payara setenv
+---
+
+When instrumenting an app that runs on a Java application server with a Java
+agent, you must add the `javaagent` path to the JVM arguments. The way to do
+this differs from server to server.
+
+## JBoss EAP / WildFly
+
+You can add the `javaagent` argument at the end of the standalone configuration
+file:
+
+{{< tabpane text=true persist=lang >}}
+
+{{% tab header="Linux" lang=Linux %}}
+
+```sh
+# Add to standalone.conf
+JAVA_OPTS="$JAVA_OPTS -javaagent:/path/to/opentelemetry-javaagent.jar"
+```
+
+{{% /tab %}} {{% tab header="Windows" lang=Windows %}}
+
+```bat
+rem Add to standalone.conf.bat
+set "JAVA_OPTS=%JAVA_OPTS% -javaagent:<Drive>:\path\to\opentelemetry-javaagent.jar"
+```
+
+{{% /tab %}} {{< /tabpane >}}
+
+## Jetty
+
+To define the path to the Java agent, use the `-javaagent` argument:
+
+```shell
+java -javaagent:/path/to/opentelemetry-javaagent.jar -jar start.jar
+```
+
+If you use the `jetty.sh` file to start Jetty, add the following line to the
+`\<jetty_home\>/bin/jetty.sh` file:
+
+```shell
+JAVA_OPTIONS="${JAVA_OPTIONS} -javaagent:/path/to/opentelemetry-javaagent.jar"
+```
+
+If you use the start.ini file to define JVM arguments, add the `javaagent`
+argument after the `--exec` option:
+
+```ini
+#===========================================================
+# Sample Jetty start.ini file
+#-----------------------------------------------------------
+--exec
+-javaagent:/path/to/opentelemetry-javaagent.jar
+```
+
+## Glassfish / Payara
+
+Add the path to the Java agent using the `asadmin` tool:
+
+{{< tabpane text=true >}} {{% tab Linux %}}
+
+```sh
+<server_install_dir>/bin/asadmin create-jvm-options "-javaagent\:/path/to/opentelemetry-javaagent.jar"
+```
+
+{{% /tab %}} {{% tab Windows %}}
+
+```powershell
+<server_install_dir>\bin\asadmin.bat create-jvm-options '-javaagent\:<Drive>\:\\path\\to\\opentelemetry-javaagent.jar'
+```
+
+{{% /tab %}} {{< /tabpane >}}
+
+You can also add the `-javaagent` argument from the Admin Console. For example:
+
+1.  Open the GlassFish Admin Console at <http://localhost:4848>.
+2.  Go to **Configurations > server-config > JVM Settings**.
+3.  Select **JVM Options > Add JVM Option**.
+4.  Enter the path to the agent:
+    `-javaagent:/path/to/opentelemetry-javaagent.jar`
+5.  **Save** and restart the server.
+
+Make sure that the domain.xml file in your domain directory contains a
+`<jmv-options>` entry for the agent.
+
+## Tomcat / TomEE
+
+Add the path to the Java agent to your startup script:
+
+{{< tabpane text=true persist=lang >}}
+
+{{% tab header="Linux" lang=Linux %}}
+
+```sh
+# Add to <tomcat_home>/bin/setenv.sh
+CATALINA_OPTS="$CATALINA_OPTS -javaagent:/path/to/opentelemetry-javaagent.jar"
+```
+
+{{% /tab %}} {{% tab header="Windows" lang=Windows %}}
+
+```bat
+rem Add to <tomcat_home>\bin\setenv.bat
+set CATALINA_OPTS=%CATALINA_OPTS% -javaagent:"<Drive>:\path\to\opentelemetry-javaagent.jar"
+```
+
+{{% /tab %}} {{< /tabpane >}}
+
+## WebLogic
+
+Add the path to the Java agent to your domain startup script:
+
+{{< tabpane text=true persist=lang >}}
+
+{{% tab header="Linux" lang=Linux %}}
+
+```sh
+# Add to <domain_home>/bin/startWebLogic.sh
+export JAVA_OPTIONS="$JAVA_OPTIONS -javaagent:/path/to/opentelemetry-javaagent.jar"
+```
+
+{{% /tab %}} {{% tab header="Windows" lang=Windows %}}
+
+```bat
+rem Add to <domain_home>\bin\startWebLogic.cmd
+set JAVA_OPTIONS=%JAVA_OPTIONS% -javaagent:"<Drive>:\path\to\opentelemetry-javaagent.jar"
+```
+
+{{% /tab %}} {{< /tabpane >}}
+
+For managed server instances, add the `-javaagent` argument using the admin
+console.
+
+## WebSphere Liberty Profile
+
+Add the path to the Java agent to the `jvm.options` file. For a single server,
+edit `${server.config.dir}/jvm.options`, and for all servers, edit
+`${wlp.install.dir}/etc/jvm.options`:
+
+```ini
+-javaagent:/path/to/opentelemetry-javaagent.jar
+```
+
+Restart the server after saving the file.
+
+## WebSphere Traditional
+
+Open the WebSphere Admin Console and follow these steps:
+
+<!-- markdownlint-disable blanks-around-fences -->
+
+1.  Navigate to **Servers > Server type > WebSphere application servers**.
+2.  Select the server.
+3.  Go to **Java and Process Management > Process Definition**.
+4.  Select **Java Virtual Machine**.
+5.  In **Generic JVM arguments**, enter the path to the agent:
+    `-javaagent:/path/to/opentelemetry-javaagent.jar`.
+6.  Save the configuration and restart the server.