I'm trying to capture AIX real-time information like CPU, memory, IO load with a C# console application because I would like to show that information in a third part custom dashboard. After running the command topas, I need to capture periodically the whole following text:
I tried to capture it with the following code that I have found out in some forum:
using Renci.SshNet;
using System;
using System.IO;
using System.Threading;
namespace SSH_check_commands
{
public class MyAsyncInfo
{
public MyAsyncInfo(Byte[] array, ShellStream stream)
{
ByteArray = array;
Stream = stream;
}
public Byte[] ByteArray { get; set; }
public ShellStream Stream { get; set; }
}
class Program
{
private static ShellStream stream;
private static SshClient client;
private static byte[] _data = new byte[2048];
static void Main(string[] args)
{
client = new SshClient("host", "user", "password");
client.Connect();
stream = client.CreateShellStream(@"xterm", 80, 24, 800, 600, 1024);
stream.DataReceived += StartAsyncRead;
stream.Write("bash\n");
Thread.Sleep(5000);
stream.Write("topas -i 10\n");
Console.ReadLine();
}
private static void StartAsyncRead(object sender, EventArgs e)
{
try
{
stream.BeginRead(_data, 0, _data.Length, OnReadCompletion, new MyAsyncInfo(_data, stream));
}
catch (Exception exception)
{
Console.WriteLine(exception);
}
}
private static void OnReadCompletion(IAsyncResult ar)
{
try
{
var mai = (MyAsyncInfo)ar.AsyncState;
int datalen = mai.Stream.EndRead(ar);
string line = client.ConnectionInfo.Encoding.GetString(mai.ByteArray, 0, datalen);
Console.Write(line);
}
catch (Exception exception)
{
Console.WriteLine(exception);
}
}
public static string SendCommand(string cmd, ShellStream sh)
{
StreamReader reader = null;
try
{
reader = new StreamReader(sh);
StreamWriter writer = new StreamWriter(sh);
writer.AutoFlush = true;
writer.WriteLine(cmd);
while (sh.Length == 0)
{
Thread.Sleep(1000);
}
}
catch (Exception ex)
{
Console.WriteLine("exception: " + ex.ToString());
}
return reader.ReadToEnd();
}
}
}
But I can't parse the result because it's not structured:
Could you please help me?
Workaround:
I have changed the approach to the problem. I could not catch whole text with ssh streaming because I receive only changed chars. Hence periodically I run the following ssh command to save nmon content in a file (called hostname_YYMMDD_H24_mm.nmon):
nmon -f -c 1
After with the cat command I can read the file, extract the content, transform it and load it in my dashboard.
