`nested runc` unfortunately needs a lot of caps/privileged. The removal of `readonly: true` is also a bit unfortunate.
Signed-off-by: Thomas Gazagnaire <thomas@gazagnaire.org>
Make all the low-level init code synchronous to avoid weird blocks on `close`.
Also move the net and ctl file descriptor at the beginning of the fd space for
the calf.
The SDK also allow to spamn multiple exec calves, which will all have the same
fd map:
- 0: stdin = /dev/null
- 1: stdout = pipe to parent stdout
- 2: stderr = pipe to parent stderr
- 3: net = socketpair to parent "net" pipe
- 4: ctl = socketpair to parent "ctl" pipe
Signed-off-by: Thomas Gazagnaire <thomas@gazagnaire.org>
This forces us to bind mount /lib but will be replaced by calling the proper
bindings later on.
Signed-off-by: Thomas Gazagnaire <thomas@gazagnaire.org>
In the riddler change I changed "command" in the yaml to "args"
but did not change the files. In fact we basically used the
default command everywhere so this did not actually break.
Remove the unnecessary "command" lines to simplify yaml.
Revert the command to args change for now as I think I prefer
command, but its easier to switch now. Need to think if the
entrypoint/command distinction matters before finalizing.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
Generated largely from the specified config; small parts taken from `docker image inspect`,
such as the command line.
Renamed some of the yaml keys to match the OCI spec rather than Docker Compose as
we decided they are more readable, no more underscores.
Add some extra functionality
- tmpfs specification
- fully general mount specification
- no new privileges can be specified now
For nostalgic reasons, using engine-api to talk to the docker cli as
we only need an old API version, and it is nice and easy to vendor...
Signed-off-by: Justin Cormack <justin.cormack@docker.com>
Use a file (that we can drop easily into the rootfs) instead of passing the full
command on the CLI (as config.json needs to be edited otherwise).
Signed-off-by: Thomas Gazagnaire <thomas@gazagnaire.org>
The inotify bindings that we are using is a bit sensitive to init
conditions, and it seems to not like being run inside in a container.
See https://github.com/samoht/irmin-watcher/issues/10
Signed-off-by: Thomas Gazagnaire <thomas@gazagnaire.org>
For now, use jbuilder to build the calf as well, this gives us a bit
more control than the mirage tool. We will switch back to the mirage
tool later on if we want to use more fancy backends (such as KVM).
Signed-off-by: Thomas Gazagnaire <thomas@gazagnaire.org>
The protocol allows the client to send concurrent RPCs to the server.
The server replies by keeping the client ID, and the client keeps a
dispatch table of queries to route the retries. By doing things like
that, the server has a strong control over resource allocation, so
a bad client cannot exhaust all the server memory.
Also add some simple tests for the serialization + wire protocol which
are all passing. Proper concurrency/resource exhaustion usage will be
added later.
Signed-off-by: Thomas Gazagnaire <thomas@gazagnaire.org>
Previously, the control plane was using HTTP client/server, that various people
found way too complex to run in a privileged container (for very good reasons).
So switching to a simpler binary protocol, using c-like structures. Will
probably switch to an other serialization protocol later (eg. protobuf
or cap-n-proto).
Signed-off-by: Thomas Gazagnaire <thomas@gazagnaire.org>
The new hiearchy is:
- pkg/{init,mirage-compile}: additional Moby packages
- src/sdk -> the begining of the MirageOS SDK for Moby
- src/dhcp-client -> the code for the MirageOS dhcp-client service
Signed-off-by: Thomas Gazagnaire <thomas@gazagnaire.org>
Today the SDK only contains helper code to create secure Moby services based on
MirageOS. Today the SDK only defines the architecture and the communication
pipes between the privileged service and the calf; the proper communication
API will be specified after we have a few more use-cases.
Signed-off-by: Thomas Gazagnaire <thomas@gazagnaire.org>
Split the bits which can be re-used in other services (e.g. init dance
and the server-side of the control path). `main.ml` now only contains what
is specific to the DHCP logic (+ the /caf directory).
Signed-off-by: Thomas Gazagnaire <thomas@gazagnaire.org>
Plus a few more minor improvements:
- compile with jbuilder.
- start working on the control path.
Signed-off-by: Thomas Gazagnaire <thomas@gazagnaire.org>
docker-compose and other utilities use the .yml extension.
For consistency rename all .yaml to .yml
Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
