Container Runtime Info #307
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| # Container Runtime | ||
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| On resin.io devices all your application code runs a [ Docker container][container-link]. This means that whatever you define as `CMD` in your `Dockerfile` will be PID 1 of the process tree in your container. It also means that this PID 1 process needs to know how to properly process UNIX signals, reap orphan zombie processes [[1]][ref-one] and if it crashes your whole container crashes, losing logs and debug info. |
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Can the ref-one be an inline reference? I don't have a problem with [1] in general, though we don't normally use this citation style in general, so it stands out. (not problem, just comment)
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yeah, thats a fair point, I'll make it inline
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LGTM, in some cases I feel like you could add more confidence to the language. Eg. Replacing |
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@craig-mulligan and @imrehg addressed most of the comments and responded where appropriate. Lets get this guy out there |
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@shaunmulligan thanks for the updates, look awesome, and comments make sense! :) And sorry, I had to push out a change in the meantime for Bryan, which conflicts with this one in |
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Rebase and resolve is the way to go indeed. |
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| If you want specific data or configurations to persist on the device through the update process, you will need to store them in `/data` . This is a special folder on the device file system which is essentially a [docker data `VOLUME`][docker-volume-link]. | ||
| <!-- TODO: explain how to reboot from systemd --> |
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to reboot from systemd:
DBUS_SYSTEM_BUS_ADDRESS=unix:path=/host_run/dbus/system_bus_socket dbus-send --system --print-reply --dest=org.freedesktop.systemd1 /org/freedesktop/systemd1 org.freedesktop.systemd1.Manager.Reboot
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rebased and resolved. merging.... |
@imrehg @craig-mulligan and @pcarranzav would love some review on this PR, added quiet a bit of stuff on resin container runtime and not sure if its 100% accurate or clear :P