whackanop

whackanop

whackanop monitors mongodb for long-running operations, killing any that it finds.

Motivation

See this blog post.

Or this StackExchange post.

Usage

$ whackanop -h
Usage of whackanop:
  -debug=true: in debug mode, operations that match the query are logged instead of killed
  -interval=1: how often, in seconds, to poll mongo for operations
  -mongourl="mongodb://localhost?connect=direct": mongo url to connect to. Must specify connect=direct to guarantee admin commands are run on the specified server.
  -query="{\"op\": \"query\", \"secs_running\": {\"$gt\": 60}}": query sent to db.currentOp()
  -verbose=false: more verbose logging
  -version=false: print the version and exit

Installation

Install from source via go get github.com/Clever/whackanop, or download a release on the releases page.

Local Development

Set this repository up in the standard location in your GOPATH, i.e. $GOPATH/src/github.com/Clever/whackanop. Once this is done, make test runs the tests.

The release process requires a cross-compilation toolchain. gox can install the toolchain with one command: gox -build-toolchain. From there you can build release tarballs for different OS and architecture combinations with make release.

Rolling an official release

Official releases are listed on the releases page. To create an official release:

1. On master, bump the version in the VERSION file in accordance with semver. You can do this with gitsem, but make sure not to create the tag, e.g. gitsem -tag=false patch.

2. Push the change to Github. Drone will automatically create a release for you.

Vendoring

Please view the dev-handbook for instructions.