@trydis

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Running ASP.NET vNext on CentOS 7

06 Jan 2015

For reference, here are the versions I used:

Mono: 3.10.0
KVM: Build 10017
KRE: 1.0.0-beta1
libuv: commit 3fd823ac60b04eb9cc90e9a5832d27e13f417f78

I created a new VM in Azure and used the image provided by OpenLogic. It contains an installation of the Basic Server packages.

Install Mono

Add the Mono Project GPG signing key:

$ sudo rpm --import "http://keyserver.ubuntu.com/pks/lookup?op=get&search=0x3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF"

Install yum utilities:

$ sudo yum install yum-utils

Add the Mono package repository:

$ sudo yum-config-manager --add-repo http://download.mono-project.com/repo/centos/

Install the mono-complete package:

$ sudo yum install mono-complete

Mono on Linux by default doesn’t trust any SSL certificates so you’ll get errors when accessing HTTPS resources. To import Mozilla’s list of trusted certificates and fix those errors, you need to run:

$ mozroots --import --sync

Install KVM

$ curl -sSL https://raw.githubusercontent.com/aspnet/Home/master/kvminstall.sh | sh && source ~/.kre/kvm/kvm.sh

Install the K Runtime Environment (KRE)

$ kvm upgrade

Running the samples

Install Git:

$ sudo yum install git

Clone the Home repository:

$ git clone https://github.com/aspnet/Home.git
$ cd Home/samples

Change directory to the folder of the sample you want to run.

ConsoleApp

Restore packages:

$ kpm restore

Run it:

$ k run
Hello World

That was easy!

HelloMvc

Restore packages:

$ kpm restore

Run it:

$ k kestrel
System.DllNotFoundException: libdl
(Removed big stack trace)

Ouch, so I went hunting for libdl:

$ sudo find / -name libdl*
/usr/lib64/libdl.so.2
/usr/lib64/libdl-2.17.so

Create symbolic link:

$ sudo ln -s /usr/lib64/libdl.so.2 /usr/lib64/libdl

Run it again:

$ k kestrel
System.NullReferenceException: Object reference not set to an instance of an object
  at Microsoft.AspNet.Server.Kestrel.Networking.Libuv.loop_size () [0x00000] in <filename unknown>:0
  at Microsoft.AspNet.Server.Kestrel.Networking.UvLoopHandle.Init (Microsoft.AspNet.Server.Kestrel.Networking.Libuv uv) [0x00000] in <filename unknown>:0
  at Microsoft.AspNet.Server.Kestrel.KestrelThread.ThreadStart (System.Object parameter) [0x00000] in <filename unknown>:0

Progress, but now we need to get libuv working.

Install libuv

$ sudo yum install gcc
$ sudo yum install automake
$ sudo yum install libtool
$ git clone https://github.com/libuv/libuv.git
$ cd libuv
$ sh autogen.sh
$ ./configure
$ make
$ make check
$ sudo make install

Run it again:

$ k kestrel
System.NullReferenceException: Object reference not set to an instance of an object
  at Microsoft.AspNet.Server.Kestrel.Networking.Libuv.loop_size () [0x00000] in <filename unknown>:0
  at Microsoft.AspNet.Server.Kestrel.Networking.UvLoopHandle.Init (Microsoft.AspNet.Server.Kestrel.Networking.Libuv uv) [0x00000] in <filename unknown>:0
  at Microsoft.AspNet.Server.Kestrel.KestrelThread.ThreadStart (System.Object parameter) [0x00000] in <filename unknown>:0

I knew it had to be a path issue or something, so I went hunting for libuv:

$ sudo find / -name libuv.so
/home/trydis/libuv/.libs/libuv.so
/usr/local/lib/libuv.so

I then checked the library name Kestrel was looking for on Linux here and based on that i created a symbolic link:

$ sudo ln -s /usr/local/lib/libuv.so /usr/lib64/libuv.so.1

Run it again:

$ k kestrel
Started

Navigate to http://your-web-server-address:5004/ and pat yourself on the back!

HelloWeb

Restore packages:

$ kpm restore

Run it:

$ k kestrel
Started

Navigate to http://your-web-server-address:5004/.

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