2148b0e2cc
The binary self-update hard-stops inside a container (internal/upgrade refuses when /.dockerenv exists), so the web's in-app 'force update' button is futile for Docker agents. Report whether we run in a container via a new RunningInDocker() helper (UNARR_DOCKER env baked into the image, /.dockerenv fallback for podman/containerd) on every register + sync, so the web can swap the button for a copy-paste 'docker compose pull' command.
26 lines
896 B
Go
26 lines
896 B
Go
package agent
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import "os"
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// RunningInDocker reports whether the agent process is running inside a Docker
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// (or compatible OCI) container. The web uses this to swap the in-app "force
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// update" button — which drives the binary self-update path that hard-stops
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// inside a container (see internal/upgrade) — for a copy-paste `docker pull`
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// command instead.
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//
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// Detection order:
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// 1. UNARR_DOCKER env truthy — baked into the official image's Dockerfile, so
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// it also covers podman/containerd running our image (which don't create
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// /.dockerenv).
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// 2. /.dockerenv exists — the standard marker Docker writes into every
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// container, covering images that didn't set the env.
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func RunningInDocker() bool {
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switch os.Getenv("UNARR_DOCKER") {
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case "1", "true", "yes":
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return true
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}
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if _, err := os.Stat("/.dockerenv"); err == nil {
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return true
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}
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return false
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}
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