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Status Functionality already exists
Workspace Instana
Categories Kubernetes
Created by Guest
Created on Aug 31, 2023

RELATED IDEAS

Manage configuration.yaml with Secret


We would like to monitor EDB Postgres for Kubernetes on Instana.

As a prerequisite, Instana runs only agents in SaaS deployment format in an OpenShift environment.

EDB Postgres for Kubernetes runs in the same OpenShift environment.

Referring to the following page, we were able to monitor EDB from Instana.

https://www.ibm.com/docs/en/instana-observability/current?topic=cha-configuring-host-agents-by-using-agent-configuration-file#hashicorp-vault

However, there are security concerns about recording DB user password information in ConfigMap.

<Definition>

# oc get cm instana-agent -n instana-agent -o yaml

apiVersion: v1

data:

cluster_name: dev-mcp-001

configuration-disable-kubernetes-sensor.yaml: |

com.instana.plugin.kubernetes:

enabled: false

configuration.yaml: |2

# Manual a-priori configuration. Configuration will be only used when the sensor

…snip…

com.instana.plugin.postgresql:

user: 'edbuser'

password: 'edbpassword'

database: 'edbuser' # by default PostgreSQL will use 'user' as database to connect to.

…snip…

The contents of configuration.yaml include confidential information depending on the settings.

Could you please improve it so that it can be defined in Secret instead of ConfigMap?

Thank you very much.


Idea priority Urgent
  • Admin
    Henning Treu
    Reply
    |     Jan 12, 2024

    Dear Customer,


    Pulling password from Kubernetes secrets in Agent configuration can already be achieved by combining two existing features:


    • Mount the password from a Secret to an environment variable or file into the application pod

      • it is critical to mount the secret inside the application pod, in your example the postgresql pod will have the file or env var mounted!

      • mount to file is described here

      • mount to environment variable is described here

    • Reference the file or env var mounted from the Agent's configuration.yaml as described here

      • Instana Agent will look up the referenced file or env var inside the application pod and fill in the configuration value for the sensor


    Thank you & best regards

    Henning Treu - Instana Product Manager Agent, Logging, Applications



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