6568cef868
[kamal-proxy](https://github.com/basecamp/kamal-proxy) is a custom minimal proxy designed specifically for Kamal. It has some 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 a proxy without conflicting config. 3. First class support for Kamal operations - rather than trying to work out how to make Traefik do what we want, we can build features directly into the proxy, making configuration simpler and avoiding obscure errors
35 lines
971 B
Ruby
35 lines
971 B
Ruby
class Kamal::Cli::Prune < Kamal::Cli::Base
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desc "all", "Prune unused images and stopped containers"
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def all
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with_lock do
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containers
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images
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end
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end
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desc "images", "Prune unused images"
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def images
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with_lock do
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on(KAMAL.hosts) do
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execute *KAMAL.auditor.record("Pruned images"), verbosity: :debug
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execute *KAMAL.prune.dangling_images
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execute *KAMAL.prune.tagged_images
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end
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end
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end
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desc "containers", "Prune all stopped containers, except the last n (default 5)"
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option :retain, type: :numeric, default: nil, desc: "Number of containers to retain"
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def containers
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retain = options.fetch(:retain, KAMAL.config.retain_containers)
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raise "retain must be at least 1" if retain < 1
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with_lock do
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on(KAMAL.hosts) do
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execute *KAMAL.auditor.record("Pruned containers"), verbosity: :debug
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execute *KAMAL.prune.app_containers(retain: retain)
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end
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end
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end
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end
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