Linux
StackState Self-hosted v5.0.x
This page describes StackState version 5.0.
Overview
StackState Agent V2
StackState Agent V2 can be installed on Linux systems running CentOS, Debian, Fedora, RedHat or Ubuntu. The Agent collects data from the host where it is running and can be configured to integrate with external systems. Retrieved data is pushed to StackState, to work with this data the StackState Agent V2 StackPack must be installed in your StackState instance. For details of the data retrieved and available integrations, see the StackPack integration documentation.
Monitoring
StackState Agent V2 will synchronize the following data with StackState from the Linux host it is running on:
Hosts, processes and containers.
Telemetry for hosts, processes and containers.
For OS versions with a network tracer:
Network connections between processes and containers.
Network traffic telemetry.
Golden signals, such as HTTP server latencies, errors and request counts.
Setup
Supported versions
StackState Agent is tested to run on the Linux versions listed below with 64bit architecture. Note that host data for network connections between processes and containers (including network traffic telemetry) can only be retrieved for OS versions with a network tracer (kernel version 4.3.0 or higher):
Install
StackState Agent V2 is installed using an install script.
Online install - If you have access to the internet on the machine where the Agent will be installed.
Offline install - If you do not have access to the internet on the machine where the Agent will be installed.
Online install
If you have access to the internet on the machine where the Agent will be installed, use one of the commands below to run the install.sh
script. The Agent installer package will be downloaded automatically.
<STACKSTATE_RECEIVER_API_KEY>
is set during StackState installation.<STACKSTATE_RECEIVER_API_ADDRESS>
is specific to your installation of StackState.
For details see StackState Receiver API.
Offline install
If you do not have access to the internet on the machine where the Agent will be installed, you will need to download both the install script and the Agent installer package before you install. You can then set the environment variable STS_INSTALL_NO_REPO=yes
and specify the path to the downloaded installer package when you run the install.sh
script.
Download the install script and copy this to the host where it will be installed:
Get the Key of the latest version of the Agent installer package (DEB or RPM package):
Download the Agent installer package and copy this to the host where it will be installed. The download link can be constructed from the S3 bucket URL and the installer package
Key
that is provided on the installer package list page. For example, to download the DEB installer package foragent_2.13.0-1_amd64.deb
, use:https://stackstate-agent-2.s3.amazonaws.com/pool/stable/s/st/stackstate-agent_2.13.0-1_amd64.deb
DEB Download link:
https://stackstate-agent-2.s3.amazonaws.com/<Key_from_DEB_installer_package_list>
RPM Download link:
https://stackstate-agent-2-rpm.s3.amazonaws.com/<Key_from_RPM_installer_package_list>
Use the command below to set the required environment variables and run the installer script.
<STACKSTATE_RECEIVER_API_KEY>
is set during StackState installation.<STACKSTATE_RECEIVER_API_ADDRESS>
is specific to your installation of StackState. For details see StackState Receiver API.
Upgrade
To upgrade StackState Agent V2 on your system, stop the stackstate-agent
service and upgrade using yum
or apt-get
. To upgrade offline, download the Agent installer package (DEB or RPM package) and copy this to the host where it will be installed - see step 2 in the offline install instructions.
Configure
Agent configuration
The StackState Agent V2 configuration is located in the file /etc/stackstate-agent/stackstate.yaml
. The <STACKSTATE_RECEIVER_API_KEY>
and <STACKSTATE_BASE_URL>
specified during installation will be added here by the install script. No further configuration should be required, however, a number of advanced configuration options are available.
Advanced Agent configuration
StackState Agent V2 can be configured to reduce data production, tune the process blacklist, or turn off specific features when not needed. The required settings are described in detail on the page advanced Agent configuration.
Integration configuration
The Agent can be configured to run checks that integrate with external systems. Configuration files for integrations run through StackState Agent V2 can be found in the directory /etc/stackstate-agent/conf.d/
. Each integration has its own configuration file that is used by the associated Agent check.
Documentation for the available StackState integrations, including configuration details can be found on the StackPacks > Integrations pages.
Proxy configuration
The Agent can be configured to use a proxy for HTTP and HTTPS requests. For details, see use an HTTP/HTTPS proxy.
Commands
Commands require elevated privileges.
Start, stop or restart the Agent
To manually start, stop or restart StackState Agent V2:
Status and information
To check if StackState Agent V2 is running and receive information about the Agent's state:
To show tracebacks for errors or output the full log:
Manually run a check
Use the command below to manually run an Agent check.
Troubleshooting
To troubleshoot the Agent, try to check the Agent status or manually run a check.
Log files
Logs for the Agent subsystems can be found in the following files:
/var/log/stackstate-agent/agent.log
/var/log/stackstate-agent/process-agent.log
Debug mode
By default, the log level of the Agent is set to INFO
. To assist in troubleshooting, the Agent log level can be set to DEBUG
. This will enable verbose logging and all errors encountered will be reported in the Agent log files.
To set the log level to DEBUG
for an Agent running on Linux:
Edit the file
/etc/stackstate-agent/stackstate.yaml
To set the log level to
DEBUG
, add the line:To also include the topology/telemetry payloads sent to StackState in the Agent log, add the line:
Save the file and restart the Agent for changes to be applied.
Support knowledge base
Troubleshooting steps for any known issues can be found in the StackState support knowledge base.
Uninstall
To uninstall StackState Agent V2 from your system, stop the stackstate-agent
service and remove it using yum
or apt-get
.
See also
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