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flesh out the docs for this a little bit. There is still a lot more

to write..
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John-Mark Gurney 3 years ago
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BITELAB BITELAB
======= =======


Bitelab is the server and client portions implemented for a fully
remote controlled lab, allowing for each board to have a different
set of attributes, which are for things like power control and
network access. This means that the board's power can be controlled
via different methods, such as GPIO (not implemented yet) or SNMP
control of PoE switches.

This repository is both the client and the server for the bitelab
infrastructure.

Features:
- Tunneling of ssh over HTTP(S), allowing only the HTTP endpoint
to be exposed publicly, making deployment significantly easier.
- UCL for configuration of boards

Client
------

The client expects two environment variables to be set, BITELAB_URL
and BITELAB_AUTH. The BITELAB_URL is set to the base URL of the
Bitelab API. The BITELAB_AUTH is set to the authentication token.
To get an auth token, use the command:
```
ssh -o 'ProxyCommand bitelab contssh' -l lab bitelab
```

The last argument, `bitelab` is not important, just should be unique
from other labs, and consistent.

The client provides basic commands to talk to the API. The

Server
------

The server uses a local configuration file, `.env`. And example file
is:
```
db_file=/ztank/state/bitelab.sqlite
board_conf=/ztank/prog/board_conf.ucl
```

The `db_file` entry is used for recording state, but it is also
contains the hashed access tokens to grant access to the boards.

The `board_conf` entry is a pointer to a UCL file that defines all
the boards that are supported by the system. An example file is:
```
setup_script = /ztank/prog/board_script;

classes {
cora-z7s = { arch = arm-armv7; }
pine64-a64-lts = { arch = arm64-aarch64; }
}

boards [
{
name = cora-1;
brdclass = cora-z7s;
options = [
{ cls = snmppower, host = poe, port = 2 },
]
},
{
name = a64lts-1;
brdclass = pine64-a64-lts;
options = [
{ cls = etheriface, val = awg0.103 },
{ cls = serialconsole, val = /dev/ttyU0 },
{ cls = snmppower, host = poe, port = 3 },
]
},
]
```

The `setup_script` is run when a board is reserved or released. This
contains the logic to setup/destroy the file system for the jail,
start/terminate the jail and reserve and release resources such as the
IP address for the jail.

The `classes` object contains entires for each class of board. This
contains the common parameters for boards that are the same. Boards
in a class should be the same so that a user can check out a class,
and get a board that matches their needs. This allows adding multiple
boards that are popular and allow automatic selection of an available
board.

The specific configuration for each board is in the list `boards`.
Each board MUST have a `name` which needs to be unique, a `brdclass`
to which the board belongs (from the previous `classes`), and an
`options` list which contains the configuration of the board.

Each option must have a `cls` parameter, which defines the behavior
of the rest of the options.

The following `cls` values are supported (see `_option_map` attribute
of the class `BoardManager` in `bitelab/__init__.py`):
- etheriface
- serialconsole
- snmppower

The remaining items in the object are passed as key word arugments
to the respective classes.


NOTES NOTES
===== =====


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