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I can tell you the day I knew I would be a Systems Administrator (the term SRE hadn’t been invented yet.) My Linux professor, a brilliant engineer at NASA, said: "The best system administrators are the laziest." He went on to qualify that statement but I had stopped listening. My fate was sealed.
Developers are building and deploying to production with greater frequency. Elite organizations are deploying to production multiple times per day. All the while we continue to distribute our applications even wider with the adoption of micro-services, and global deployments. This consistent churn and increasing code complexity create the perfect storm that makes finding problems even harder. How do you know the changes just committed actually deployed? How do you know the changes worked?
The HAProxy Process Manager allows you to start external programs that are managed under HAProxy. Not everything is compiled directly into HAProxy’s C code. Some components are written using other programming languages and run alongside the load balancer.
Out-of-memory (OOM) errors take place when the Linux kernel can’t provide enough memory to run all of its user-space processes, causing at least one process to exit without warning. Without a comprehensive monitoring solution, OOM errors can be tricky to diagnose. In this post, you will learn how to use Datadog to diagnose OOM errors on Linux systems.
