public async Task read_kvp_entries(string filePath)
{
var dic = new Dictionary <string, string>();
await foreach (var entry in HypervUtils.ReadKvpPoolAsync(filePath))
{
dic[entry.Name] = entry.Value;
}
Assert.Contains("VirtualMachineId", (IDictionary <string, string>)dic);
Assert.Contains("VirtualMachineName", (IDictionary <string, string>)dic);
Assert.Contains("PhysicalHostNameFullyQualified", (IDictionary <string, string>)dic);
}
public override async Task <NodeGetInfoResponse> NodeGetInfo(NodeGetInfoRequest request, ServerCallContext context)
{
//KVP daemon for KVP transfers to and from the host
//centos: sudo yum install -y hyperv-daemons
//read hostname from kvp values
//strings /var/lib/hyperv/.kvp_pool_3|sed -n '/PhysicalHostNameFullyQualified/ {n;p}'
//KVP byte array of fix sized fields key:512,value:2048 /0 filled
//The byte array contains a UTF-8 encoded string,
//which is padded out to the max size with null characters.
//However, null string termination is not guaranteed (see kvp_send_key).
//https://stackoverflow.com/questions/17530460/code-sample-for-reading-values-from-hyper-v-kvp-component-on-linux-aka-kvp-data
var vmId = string.Empty;
await foreach (var entry in HypervUtils.ReadKvpPoolAsync().WithCancellation(context.CancellationToken))
{
switch (entry.Name)
{
case "VirtualMachineId":
vmId = entry.Value;
break;
//case "VirtualMachineName":
//case "PhysicalHostNameFullyQualified":
default:
break;
}
}
if (string.IsNullOrEmpty(vmId))
{
throw new RpcException(new Status(StatusCode.InvalidArgument, string.Empty),
"hyperv kvp could not be read");
}
var rsp = new NodeGetInfoResponse
{
NodeId = vmId,
//todo MaxVolumesPerNode = 4*64 -1 //todo query by lsscsi
//maybe AccessibleTopology from FailoverCluster query
};
return(rsp);
}
// This method gets called by the runtime. Use this method to add services to the container.
// For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
public void ConfigureServices(IServiceCollection services)
{
services.AddOptions <HypervCsiDriverOptions>()
.Bind(Configuration.GetSection("Driver"))
.PostConfigure(opt =>
{
switch (opt.Type)
{
case HypervCsiDriverType.Controller:
//load hyperv host from kvp
if (string.IsNullOrEmpty(opt.HostName))
{
var(_, value) = HypervUtils.ReadKvpPoolAsync()
.FirstOrDefaultAsync(n => n.Name == "PhysicalHostNameFullyQualified")
.Result;
if (!string.IsNullOrEmpty(value))
{
opt.HostName = value;
}
if (string.IsNullOrEmpty(opt.UserName))
{
opt.UserName = "******"; //aka windows root
}
}
break;
}
})
.Validate(opt =>
{
switch (opt.Type)
{
case HypervCsiDriverType.Controller:
if (string.IsNullOrEmpty(opt.HostName))
{
return(false);
}
return(true);
case HypervCsiDriverType.Node:
return(true);
default:
return(false);
}
});
var driverType = Configuration.GetValue <HypervCsiDriverType>("Driver:Type");
switch (driverType)
{
case HypervCsiDriverType.Controller:
services.AddSingleton <IHypervVolumeService, HypervVolumeService>();
break;
case HypervCsiDriverType.Node:
services.AddSingleton <IHypervNodeService, LinuxNodeService>();
break;
}
services.AddGrpc();
}