be7f584010
Dynamically supervise a GRPC connection and keep it alive for a while, using a timeout to kill the process on inactivity. The Connection GenServer keeps the connection alive, while listening to a health stream from the GRPC endpoint, notifying any subscribed listeners about changes to health. This health is then propagated to the main servers page. Also create a looping get_sys_info which retrieves some basic system information.
56 lines
1.5 KiB
Elixir
56 lines
1.5 KiB
Elixir
defmodule PrymnWeb.ServerLive.Show do
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use PrymnWeb, :live_view
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alias Prymn.{Agents, Servers}
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@impl true
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def mount(_params, _session, socket) do
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{:ok, socket}
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end
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@impl true
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def handle_params(%{"id" => id}, _, socket) do
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server = Servers.get_server!(id)
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pid = self()
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if connected?(socket) do
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Agents.start_connection_or_keep_alive(server.public_ip)
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Task.start_link(fn -> get_sys_info(pid, server.public_ip) end)
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end
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{:noreply,
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socket
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|> assign(:page_title, server.name)
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|> assign(:server, server)
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|> assign(:uptime, 0)
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|> assign(:cpus, [])
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|> assign(:total_memory, 0)
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|> assign(:used_memory, 0)
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|> assign(:registration_command, Servers.create_setup_command(server))}
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end
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@impl true
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def handle_info(%PrymnProto.Prymn.SysInfoResponse{} = response, socket) do
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{:noreply,
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socket
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|> assign(:uptime, response.uptime)
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|> assign(
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:used_memory,
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bytes_to_gigabytes(response.mem_total_bytes - response.mem_avail_bytes)
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)
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|> assign(:total_memory, bytes_to_gigabytes(response.mem_total_bytes))
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|> assign(:cpus, response.cpus)}
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end
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defp bytes_to_gigabytes(bytes) do
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Float.round(bytes / Integer.pow(1024, 3), 2)
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end
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defp get_sys_info(from, host_address) do
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channel = Agents.get_channel(host_address)
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{:ok, reply} = PrymnProto.Prymn.Agent.Stub.get_sys_info(channel, %Google.Protobuf.Empty{})
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send(from, reply)
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Process.sleep(:timer.seconds(2))
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get_sys_info(from, host_address)
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end
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end
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