Restoring security-agent connectivity
A container-security upgrade exposed a connection-setting difference. Comparing the working and failing deployments helped restore agent connectivity.
Professional experience · Non-production Kubernetes environmentA container-security console was upgraded and its Kubernetes agents were updated through Helm. The newer agents could not connect, while rolling the agents back restored the connection. That comparison provided a useful starting point: an installed upgrade was not yet a functioning upgrade. The investigation needed to account for the generated deployment configuration as well as the software revision.
I upgraded the console and agent deployment, tested rollback behavior, compared the deployment settings, and confirmed that the agents could connect after the correction. The published account omits internal addresses, authentication material, vulnerability identifiers, and private operating procedures.
Open each stage for the action and its supporting result. This is a conceptual sequence; internal topology and procedures are omitted.
Check whether the updated agents actually connect to the console after the Helm upgrade.
What was established
The upgrade had been applied, but connection failure remained. That distinction prevented deployment success from being mistaken for service recovery.
Compare the failed upgrade with the earlier agent deployment, which could still connect.
What was established
The rollback provided a working reference for examining configuration differences.
Review the deployment comparison for a change in the agent connection destination and correct the configuration for its intended network path.
What was established
The supporting comparison showed a connection-address difference between the working and failing deployments.
Check the console for connected agents and review the scan result as a separate outcome.
What was established
The owner confirmation and console attachment show recovered connectivity. The scan attachment did not establish a clean security scan.
Use the working rollback as evidence and inspect the generated configuration alongside the version change.
The tradeoffComparison takes additional investigation, but can distinguish a deployment-setting problem from an assumption about a software regression.
Report operational recovery and security-assessment results independently.
The tradeoffA working agent connection does not close every security finding. Each outcome needs its own acceptance evidence.
Identify the connection destination as a setting that deserves explicit review during upgrades.
The tradeoffA generic lesson can help future maintenance, but the exact validation must still fit the product and environment being changed.
The console and agent upgrades were carried out in the reviewed non-production environment.
Agent connectivity was restored and corroborated by the console screenshot.
The configuration comparison supplied evidence for the connection-setting investigation.
Generated configuration is part of the change. A useful upgrade review compares behavior and settings across revisions, then verifies the operational and security outcomes separately.
Owner messages confirming the upgrade, rollback behavior, and restored connection were rechecked on 5 September 2026. The configuration comparison, connected-agent view, and scan-result attachments were inspected. No private screenshots or deployment configuration are reproduced here.
This repository demonstrates related engineering skills. It contains personal project work, not employer code or a reproduction of the private environment.
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