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Add support for tracking total network traffic #267

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Add support for tracking total network traffic #267

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35 changes: 34 additions & 1 deletion lib/nerves_hub_link/extensions/health/default_report.ex
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Original file line number Diff line number Diff line change
Expand Up @@ -40,7 +40,8 @@ defmodule NervesHubLink.Extensions.Health.DefaultReport do
cpu_utilization(),
load_averages(),
memory(),
disk()
disk(),
network_traffic()
]
|> Enum.reduce(%{}, &Map.merge/2)
end
Expand Down Expand Up @@ -213,6 +214,38 @@ defmodule NervesHubLink.Extensions.Health.DefaultReport do
end
end

defp network_traffic() do
{output, _} = System.cmd("cat", ["/proc/net/dev"])

[_top, _header | data] = String.split(output, "\n")

{_, data} = List.pop_at(data, -1)

data
|> Enum.map(fn line ->
[interface, bytes_received, _, _, _, _, _, _, _, bytes_sent | _] = String.split(line)

%{
interface: String.replace(interface, ":", ""),
bytes_received_total: bytes_received,
bytes_sent_total: bytes_sent
}
end)
|> Enum.reject(fn %{interface: interface} ->
interface == "lo"
end)
|> Enum.map(fn data ->
%{
"#{data.interface}_bytes_received_total" => data.bytes_received_total,
"#{data.interface}_bytes_sent_total" => data.bytes_sent_total
}
end)
|> Enum.reduce(%{}, &Map.merge/2)
rescue
_ ->
%{}
end

defp vintage_net() do
case Application.ensure_loaded(:vintage_net) do
:ok ->
Expand Down