Dynamic Install and Uninstall Script User Manual

Sermant dynamic installation and uninstallation scripts (opens new window) is a C language script implemented based on the Java Attach API, which can mount sermant to JVM process on a virtual machine or JVM process on a container.

Note: This script is only available for use on Linux systems

Parameter configuration

• -path=：Required parameter, followed by the absolute path of servant-agent.jar

• -pid=：Required parameter, followed by the host application's PID, can be viewed using commands such as ps - ef

• -command=：Required parameter, followed by the instruction to mount the servant. The supported instructions can be found in the Sermant-agent User Manual

• -nspid=：When the host application container is running, it is a required parameter, followed by the host application's nspid, which can be viewed using the cat/proc/{pid}/status command. Do not fill in this parameter when the host application is running on a virtual machine

Steps for using scripts

1. Compile jvm_attach.c

gcc attach.c -o attach

Note: Please ensure that gcc has been installed

2. Execute attach script

./attach -path={sermant-path}/sermant-agent.jar -pid={pid} -command={COMMAND}

The execution status of the script is as follows:

[root@b6b9af8e5610 root]# ./attach -path=/home/sermant-agent-1.0.0/agent/sermant-agent.jar -pid=494 -command=INSTALL-PLUGINS:database-write-prohibition
[INFO]: PATH: /home/sermant-agent-1.0.0/agent/sermant-agent.jar
[INFO]: PID: 494
[INFO]: COMMAND: INSTALL-PLUGINS:database-write-prohibition
[INFO]: Connected to remote JVM of pid 494
[INFO]: ret code is 0, Attach success!