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6 min read
3-2-1 and immutable backups: how to check that your backups work
What the 3-2-1 rule is, what immutable backups add against ransomware and how to run a test restore to find out whether your backups actually work.
Technical blog on SRE and platforms
Technical notes on reliability, backups, servers and DevOps, written from day-to-day work.
More articles
6 min read
What server maintenance should include
Planned patching, backups with test restores, alerts, access, renewals and reporting: how to tell whether your server is being properly looked after.
7 min read
When to hire a freelance DevOps or SRE (and when not to)
Signs your team needs a freelance DevOps or SRE, which tasks to outsource, when it isn't worth it and how to avoid depending on one person.
4 min read
Advanced Dockerfiles: HEALTHCHECK, heredoc and BuildKit mounts
Part two of Dockerfile best practices: health checks, heredoc syntax and RUN --mount for secrets, caches and SSH keys.
5 min read
Dockerfile best practices: a guide for developers
Tips for developers writing Dockerfiles: WORKDIR, multi-stage builds, base images, ARG and ENV, ENTRYPOINT and CMD, downloads and .dockerignore.
4 min read
Server monitoring with Prometheus, Node Exporter and Grafana
Step-by-step lab: Prometheus and Node Exporter with Docker Compose, a simple Grafana dashboard with uptime, disk, CPU and memory, plus alerts.
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