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resource.metrics.dashboard

This repository contains the source code for the Resource-Metrics.Dashboard image, the image that contains an instance of the Grafana dashboard application.

Image

The image is created by using the Linux base image and amending it using a Chef cookbook which installs Grafana.

Contents

  • The Grafana application. The version of which is determined by the default['grafana']['version'] attribute in the default.rb attributes file in the cookbook.

Configuration

The configuration for the Grafana instance comes from a Consul-Template template file which replaces some of the template parameters with values from the Consul Key-Value store.

Important parts of the configuration file are

  • Authentication is done via LDAP which is configued to use an Active Directory system.
  • Dashboards and data sources are assumed to be obtained from the Consul Key-Value store via Consul-Template using the Grafana provisioning feature.
  • Metrics are pushed to Telegraf via the Graphite protocol

Authentication

In order to interact with Grafana users need to be authenticated.

Physical users are authenticated with Active Directory via the LDAP plugin which uses the following settings.

Setting Consul Key-Value path Example
Active directory servers config/environment/directory/endpoints/hosts ad01.example.com, ad02.example.com
DN lookup attribute sAMAccountName -
DN lookup base /config/environment/directory/query/lookupbase OU=Users,DC=ad,DC=example,DC=com
Group lookup base /config/environment/directory/query/groups/lookupbase OU=Groups,DC=ad,DC=example,DC=com
Administrator group config/environment/directory/query/groups/queue/administrators CN=Metrics Administrators,OU=Groups,DC=ad,DC=example,DC=com

The initial configuration is provided via Consul-Template by providing Consul-Template with the authentication to read the username and password for the Active Directory user that can be used to perform AD lookups.

Provisioning

No changes to the provisioning are applied other than the default one for the base image.

Logs

No additional configuration is applied other than the default one for the base image.

Metrics

Metrics are collected from Grafana via Telegraf.

Build, test and release

The build process follows the standard procedure for building Calvinverse images.

Deploy

  • Download the new image to one of your Hyper-V hosts.
  • Create a directory for the image and copy the image VHDX file there.
  • Create a VM that points to the image VHDX file with the following settings
    • Generation: 2
    • RAM: at least 1024 Mb
    • Hard disk: Use existing. Copy the path to the VHDX file
    • Attach the VM to a suitable network
  • Update the VM settings:
    • Enable secure boot. Use the Microsoft UEFI Certificate Authority
    • Attach a DVD image that points to an ISO file containing the settings for the environment. These are normally found in the output of the Calvinverse.Infrastructure repository. Pick the correct ISO for the task, in this case the Linux Consul Client image
    • Disable checkpoints
    • Set the VM to always start
    • Set the VM to shut down on stop
  • Start the VM, it should automatically connect to the correct environment once it has provisioned
  • Remove the old VM
    • SSH into the host
    • Issue the consul leave command
    • Shut the machine down with the sudo shutdown now command
    • Once the machine has stopped, delete it

About

This repository contains the source code and Packer configuration files to create an image, for either Hyper-V or Azure, that contains an instance of the Grafana application

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