Monitoring

SSH Telegram Notify Have you ever wanted to get a Telegram notification when someone logs into your server via SSH? I did! I also wanted to automate the entire setup with Ansible for faster deployment and updates. So, I created an Ansible role that does exactly that. It automatically configures your servers to send login/logout notifications to Telegram. It currently supports Debian/Ubuntu, but can easily be extended to other Linux distributions. ...

AWS infrastructure changes notifications with Slack CloudTrail is a powerful service that helps audit the actions of users and roles in your AWS account. It can be integrated with other services to improve the way you react to infrastructure changes. This is especially useful for large projects. In this article, we’ll describe both a basic and an improved way to track infrastructure changes in your AWS account and send notifications to Slack. ...

In Prometheus, memory usage is dominated by the number of time series currently stored in the head block (plus indexes). Your goal is to find which metrics/labels/targets create the most series and which ones churn (get created/removed frequently). Use the built-in TSDB status endpoint Prometheus exposes a helper endpoint that lists the top offenders: http://<prometheus>:9090/api/v1/status/tsdb?limit=50 Useful sections in the JSON: seriesCountByMetricName – metric names with the most series labelValueCountByLabelName – label names with the most distinct values seriesCountByLabelPair – specific label=value pairs that explode series (Recent versions) memoryInBytesByLabelName – memory cost per label name You can filter further with match[], for example: ...