Issue 213: the controller is a Go program and still runs in a container #328
@@ -31,8 +31,9 @@ The controller is the one piece of the mesh's own Go code still shipped as an im
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§1 says a module's own code is bundles, never an image, and §3 that a bundle that is a service is a
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`process` the host runs. The controller breaks the rule it is the mechanism of: the registration
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gate that will refuse an image of a module's own code has to exempt the controller, or refuse it.
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It also costs what an image costs — a container runtime on its machine as a hard requirement, a
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container network between it and the bus and store, an image rebuild for a binary change — and
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It also costs what an image costs — a container runtime on its machine as a hard requirement,
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eight mounts standing in for files a process would simply read, an image rebuild for a binary
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change — and
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every restart of it is a container recreation, which is how the controller restarts in the middle
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of a plan today.
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@@ -41,8 +42,9 @@ of a plan today.
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- The controller's module declares a Go bundle (`system`, `binary`) and a `process` running it
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(`./<binary>`, mesh-host #81), with its credential and store connection as files and words, not
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container mounts and a container network name.
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- What the container gives it now that a process would not: its view of the store and the bus by
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container name, its own user, any files it writes. Each named and replaced.
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- What the container gives it now that a process would not: it runs on the host's network already,
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as an unprivileged user (65534), with eight mounts. Each mount named and replaced by a path, and
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the user by an account the host declares.
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- The handover: the controller restarting itself as a process, on the one machine that runs it,
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without a window where nothing answers the mesh's verbs.
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