AWS ec2-describe-tags as a standalone executable

Written in golang.

Precompiled binary for Linux fully linked and executable on any x86 Linux distro including Alpine Linux.

Precompiled binary for MacOSX

https://github.com/hmalphettes/go-ec2-describe-tags/releases

Motivation

Need to populate fleet's metadata with the instance tags.

• curl and bash are not enough to read tags
• Can't install python and awscli on CoreOS
• Cant wait for Docker to be ready and run a containerised awscli
• Lazy download of a single executable calls on the CLI works.

Usage

wget https://github.com/hmalphettes/go_ec2_describe_tags/release/.../go-ec2-describe-tags
# wget https://github.com/hmalphettes/go_ec2_describe_tags/release/.../go-ec2-describe-tags-macos

chmod +x go-ec2-describe-tags

./go-ec2-describe-tags -access_key=XXX -secret_access_key=YYYYY -region=us-east-1 -instance_id=zzzzzz
Name=testing
foo=bar

# specify the delimiters
./go-ec2-describe-tags -access_key=XXX -secret_access_key=YYYYY -region=us-east-1 -instance_id=zzzzzz -kv_delim='->' -p_delim=';'
Name->testing;foo=bar

Environment variables for default values:

• Access key and secret key defaults to environment variables AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY.
• Region default to the environment variable AWS_REGION

Usage on an EC2 instance

When executed on an EC2 instance the flag -query_meta=true will query the metadata service to discover the region and instance_id:

wget https://github.com/hmalphettes/go-ec2-describe-tags/releases/download/v0.0.1/go-ec2-describe-tags
chmod +x go-ec2-describe-tags
./go-ec2-describe-tags -access_key=XXX -secret_access_key=YYYYY -query_meta=true -p_delim=,
Name=testing,foo=bar