tomcat

The tomcat collector reads Tomcat's management endpoint /manager/status/all, which requires authentication. Edit tomcat-users.xml and add the following content:

xml

<role rolename="admin-gui" />
<user username="tomcat" password="s3cret" roles="manager-gui" />

In addition, you need to comment out the following content in the file webapps/manager/META-INF/context.xml:

xml

  <Valve className="org.apache.catalina.valves.RemoteAddrValve"
         allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" />

Otherwise Tomcat will return the following error, and the tomcat collector will not be able to collect any data.

html

403 Access Denied
You are not authorized to view this page.

By default the Manager is only accessible from a browser running on the same machine as Tomcat. If you wish to modify this restriction, you'll need to edit the Manager's context.xml file.

Configuration

The configuration file is located at conf/input.tomcat/tomcat.toml

toml

[[instances]]
## URL of the Tomcat server status
url = "http://127.0.0.1:8080/manager/status/all?XML=true"

## HTTP Basic Auth Credentials
username = "tomcat"
password = "s3cret"

## Request timeout
# timeout = "5s"

# # interval = global.interval * interval_times
# interval_times = 1

# important! use global unique string to specify instance
# labels = { instance="192.168.1.2:8080", url="-" }

## Optional TLS Config
# use_tls = false
# tls_min_version = "1.2"
# tls_ca = "/etc/categraf/ca.pem"
# tls_cert = "/etc/categraf/cert.pem"
# tls_key = "/etc/categraf/key.pem"
## Use TLS but skip chain & host verification
# insecure_skip_verify = true