Tooling
Rustfmt Configuration and Formatting Checks in CI Explained
Format Rust code the same way everywhere with rustfmt: the few settings worth changing, the nightly-only options to avoid, and a CI check that fails on unformatted code.
2 min read
Library
Everything you need to level up your coding skills.
ToolingGuide
Editing Rust in Neovim With LSP and Treesitter Setup
Neovim talks to rust-analyzer through its built-in LSP client. A short config gives completion, diagnostics, formatting and Treesitter highlighting, and rustaceanvim adds Rust extras.
14 min read
DevOps
Incident Response for Rust Services a Short Runbook
A one-page runbook for when a Rust service misbehaves: stabilize first, check recent changes, read the four golden signals, find the failing dependency, and use the Rust-specific evidence: panics, memory, executor stalls.
4 min read
Tooling
Debugging Async Backtraces and Task Dumps in Tokio
A hung async service has no useful thread backtrace. Tokio task dumps capture the await stack of every task. Enable tokio_unstable and taskdump, trigger a dump from a signal or endpoint, and read where each task is parked.
4 min read
Tooling
Rust Error Too Many Open Files and Raising the Limit
Os error 24 means the process hit its file descriptor limit. Check the limit and the live count, find the leak or the missing bound, raise the limit in systemd, Docker or code, and cap concurrency so it stays low.
4 min read
Tooling
Rust Error Connection Refused From Reqwest and Sockets
Connection refused means nothing was listening at that address and port. Check the bind address, localhost versus 127.0.0.1, containers and Docker networks, startup order and the wrong port, with commands for each.
4 min read
Systems
Measuring Memory Use of a Rust Program With Heaptrack
Find where a Rust program allocates and how much it holds. Use /usr/bin/time for peak RSS, heaptrack for Linux allocation timelines, the dhat crate for portable heap profiles and a counting allocator for tests.
4 min read
Cargo Outdated and Cargo Upgrade for Keeping Crates Fresh
cargo update moves within your version ranges; cargo outdated shows what is beyond them; cargo upgrade and cargo update --breaking edit the ranges themselves. Learn the safe routine for each.
6 min read
Concurrency
Tokio Tasks Never Finish and Five Reasons It Happens
A task that hangs forever has a short list of causes: a channel sender that never drops, an await on a lock held across an await, a blocked worker, a missing timeout, or a lost wake-up.
7 min read
Concurrency
Tokio Console for Finding Stuck Tasks in Rust Services
tokio-console shows every task, how long it has been idle or busy, and which ones never wake up. Set it up with console-subscriber and read the columns that expose stuck and blocking tasks.
6 min read
Security
Logging Without Leaking Secrets in Rust Web Services
Logs leak more secrets than breaches: derived Debug, request headers, URLs, SQL parameters and error chains. Use secrecy, custom Debug, tracing skip and filters to stop it.
4 min read
Tooling
Git Ignore for Rust Projects and What to Commit Step by Step
What belongs in .gitignore for a Rust project, why Cargo.lock is committed for binaries, and what to keep out of the repository: target, secrets, editor files and local config.
2 min read
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