1835abac7f | ||
---|---|---|
lib | ||
nodedb | ||
.gitignore | ||
.travis.yml | ||
LICENSE | ||
README.md | ||
aliases.json_sample | ||
backend.py |
README.md
Data for Freifunk Map, Graph and Node List
ffmap-backend gathers information on the batman network by invoking :
- batctl (might require root),
- alfred-json and
- batadv-vis
The output will be written to a directory (-d output
).
Run backend.py --help
for a quick overview of all available options.
For the script's regular execution add the following to the crontab:
* * * * * backend.py -d /path/to/output -a /path/to/aliases.json --vpn ae:7f:58:7d:6c:2a d2:d0:93:63:f7:da
Dependencies
- Python Package Networkx
- alfred-json
Running as unprivileged user
Some information collected by ffmap-backend requires access to specific system resources.
Make sure the user you are running this under is part of the group that owns the alfred socket, so alfred-json can access the alfred daemon.
# ls -al /var/run/alfred.sock
srw-rw---- 1 root alfred 0 Mar 19 22:00 /var/run/alfred.sock=
# adduser map alfred
Adding user `map' to group `alfred' ...
Adding user map to group alfred
Done.
$ groups
map alfred
Running batctl requires passwordless sudo access, because it needs to access the debugfs to retrive the gateway list.
# echo 'map ALL = NOPASSWD: /usr/sbin/batctl' | tee /etc/sudoers.d/map
map ALL = NOPASSWD: /usr/sbin/batctl
# chmod 0440 /etc/sudoers.d/map
That should be everything. The script automatically detects if it is run in unprivileged mode and
will prefix sudo
where necessary.
Data format
nodes.json
{ 'nodes': {
node_id: { 'flags': { flags },
'firstseen': isoformat,
'lastseen': isoformat,
'nodeinfo': {...}, # copied from alfred type 158
'statistics': {
'uptime': double, # seconds
'memory_usage': double, # 0..1
'clients': double,
'rootfs_usage': double, # 0..1
'loadavg': double,
'gateway': mac
}
},
...
}
'timestamp': isoformat
}
flags (bool)
- online
- gateway
Removing owner information
If you'd like to redact information about the node owner from nodes.json
,
you may use a filter like jq. In this case, specify an output directory
different from your webserver directory, e.g.:
./backend.py -d /ffmap-data
Don't write to files generated in there. ffmap-backend uses them as its database.
After running ffmap-backend, copy graph.json
to your webserver. Then,
filter nodes.json
using jq
like this:
jq '.nodes = (.nodes | with_entries(del(.value.nodeinfo.owner)))' \
< /ffmap-data/nodes.json > /var/www/data/nodes.json
This will remove owner information from nodes.json before copying the data to your webserver.