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new_relic_agent
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1.18.0
1.18.0-rc.5
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1.18.0-rc.2
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1.17.0-rc.4
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1.0.2
1.0.1
1.0.0
New Relic's Open-Source Elixir Agent
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lib/new_relic/util.ex
defmodule NewRelic.Util do
@moduledoc false
def hostname do
with {:ok, name} <- :inet.gethostname(), do: to_string(name)
end
def pid, do: System.get_pid() |> String.to_integer()
def get(url, headers, timeout_ms \\ :infinity) do
with url = to_charlist(url),
headers = for({k, v} <- headers, do: {to_charlist(k), to_charlist(v)}) do
:httpc.request(
:get,
{url, headers},
[{:timeout, timeout_ms}],
[]
)
end
end
def post(url, body, headers) when is_binary(body) do
with url = to_charlist(url),
headers = for({k, v} <- headers, do: {to_charlist(k), to_charlist(v)}) do
:httpc.request(
:post,
{url, headers, 'application/json', body},
[],
[]
)
end
end
def post(url, body, headers), do: post(url, Jason.encode!(body), headers)
def time_to_ms({megasec, sec, microsec}),
do: (megasec * 1_000_000 + sec) * 1_000 + round(microsec / 1_000)
def elixir_environment() do
build_info = System.build_info()
[
["Language", "Elixir"],
["Elixir Version", build_info[:version]],
["OTP Version", build_info[:otp_release]],
["Elixir build", build_info[:build]]
]
end
def utilization() do
%{
metadata_version: 3,
logical_processors: :erlang.system_info(:logical_processors),
total_ram_mib: get_system_memory(),
hostname: hostname()
}
|> maybe_add_boot_id()
|> maybe_add_vendors()
end
@mb 1024 * 1024
defp get_system_memory() do
case :memsup.get_system_memory_data()[:system_total_memory] do
nil -> nil
bytes -> trunc(bytes / @mb)
end
end
defp maybe_add_boot_id(util) do
case File.read("/proc/sys/kernel/random/boot_id") do
{:ok, boot_id} -> Map.put(util, "boot_id", boot_id)
_ -> util
end
end
@aws_url "http://169.254.169.254/2016-09-02/dynamic/instance-identity/document"
def maybe_add_vendors(util, options \\ []) do
Keyword.get(options, :aws_url, @aws_url)
|> aws_vendor_hash()
|> case do
nil -> util
aws_hash -> Map.put(util, :vendors, %{aws: aws_hash})
end
end
@aws_vendor_data ["availabilityZone", "instanceId", "instanceType"]
defp aws_vendor_hash(url) do
case get(url, [], 100) do
{:ok, {{_, 200, 'OK'}, _headers, body}} ->
case Jason.decode(body) do
{:ok, data} -> Map.take(data, @aws_vendor_data)
_ -> nil
end
_error ->
nil
end
end
end