822590dcf6
[mproxy](https://github.com/basecamp/parachute) is a custom minimal proxy designed specifically for Kamal. It has two big advantages over Traefik: 1. Imperative deployments - we tell it to switch from container A to container B, and it waits for container B to start then switches. No need to poll for health checks ourselves or mess around with forcing health checks to fail. 2. Support for multiple apps - as much as possible, configuration is supplied at runtime by the deploy command, allowing us to have multiple apps share an instance of mproxy without conflicting config.
28 lines
940 B
Bash
Executable File
28 lines
940 B
Bash
Executable File
#!/bin/bash
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install_kamal() {
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cd /kamal && gem build kamal.gemspec -o /tmp/kamal.gem && gem install /tmp/kamal.gem
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}
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# Push the images to a persistent volume on the registry container
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# This is to work around docker hub rate limits
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push_image_to_registry_4443() {
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# Check if the image is in the registry without having to pull it
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if ! stat /registry/docker/registry/v2/repositories/$1/_manifests/tags/$2/current/link > /dev/null; then
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hub_tag=$1:$2
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registry_4443_tag=registry:4443/$1:$2
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docker pull $hub_tag
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docker tag $hub_tag $registry_4443_tag
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docker push $registry_4443_tag
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fi
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}
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install_kamal
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push_image_to_registry_4443 nginx 1-alpine-slim
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push_image_to_registry_4443 basecamp/parachute latest
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push_image_to_registry_4443 busybox 1.36.0
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# .ssh is on a shared volume that persists between runs. Clean it up as the
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# churn of temporary vm IPs can eventually create conflicts.
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rm -f /root/.ssh/known_hosts
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