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Add KAMAL_DESTINATION to Docker container env vars#1634

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djmb merged 1 commit intobasecamp:mainfrom
tom-spalding:main
Oct 19, 2025
Merged

Add KAMAL_DESTINATION to Docker container env vars#1634
djmb merged 1 commit intobasecamp:mainfrom
tom-spalding:main

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@tom-spalding tom-spalding commented Aug 26, 2025 •
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Hi! I'm using ENV["KAMAL_DESTINATION"] in my Rails app. I saw #1019 but noticed that the value wasn't set in the Docker container env vars.

To deploy I'm doing kamal deploy -d production and to test I'm doing this.

> docker ps
CONTAINER ID   IMAGE
5af5aa2e09de    ...

> docker exec 5af5aa2e09de env
PATH=/usr/local/bundle/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
HOSTNAME=123.123.123.170-b976c50b72f9
RAILS_MASTER_KEY=xxxxx
KAMAL_CONTAINER_NAME=app-web-production-ae4beca3a15481a70df97d0d50d0b5010ff6978b
KAMAL_VERSION=ae4beca3a15481a70df97d0d50d0b5010ff6978b
KAMAL_HOST=123.123.123.170
SOLID_QUEUE_IN_PUMA=true
LANG=C.UTF-8
RUBY_VERSION=3.4.1
RUBY_DOWNLOAD_URL=https://cache.ruby-lang.org/pub/ruby/3.4/ruby-3.4.1.tar.xz
RUBY_DOWNLOAD_SHA256=018d59ffb52be3c0a6d847e22d3fd7a2c52d0ddfee249d3517a0c8c6dbfa70af
GEM_HOME=/usr/local/bundle
BUNDLE_SILENCE_ROOT_WARNING=1
BUNDLE_APP_CONFIG=/usr/local/bundle
RAILS_ENV=production
BUNDLE_DEPLOYMENT=1
BUNDLE_PATH=/usr/local/bundle
BUNDLE_WITHOUT=development
HOME=/home/rails

Hopefully this is in the right direction? Thanks for the great project. I use it for all my apps now.

@djmb djmb merged commit 8b9b3b5 into basecamp:main Oct 19, 2025
@edmz edmz mentioned this pull request Nov 4, 2025
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@tom-spalding @djmb