Introduction

In this post I will cover how to create a Cisco IOSXRv Vagrant box for use with the vagrant-libvirt provider as well as enabling the netconf API.

This post assumes a working installation of Vagrant with the vagrant-libvirt plugin already installed. You can follow this post to get the vagrant-libvirt plugin installed.

For reference the following software will be used in this post.

  • IOSXRv - 6.1.3
  • Vagrant - 2.1.0
  • vagrant-libvirt - 0.0.43

Download

Navigate to the Cisco software download page and download the iosxrv-k9-demo-6.1.3.qcow2 image.

Note

I am using the image available for download as part of my VIRL subscription

Install

Create and change into directory for IOSXRv files. I like to keep my custom vagrant boxes under ~/vagrant/boxes/.


mkdir -p ~/vagrant/boxes/cisco/iosxrv
cd ~/vagrant/boxes/cisco/iosxrv
            

Copy the IOSXRv files downloaded earlier to the ~/vagrant/boxes/cisco/iosxrv/ directory.


cp ~/Downloads/iosxrv-k9-demo-6.1.3.qcow2 .
          

The good folks who maintain the vagrant-libvirt plugin have a script can be used to convert qcow2 images to a vagrant box. Download the libvirt convertsion script.


curl -O https://raw.githubusercontent.com/vagrant-libvirt/vagrant-libvirt/master/tools/create_box.sh
          

Use a text editor to create a two bootstrap config files named iosxr_config_admin.txt and iosxr_config.txt with the below contents that will be applied to the IOSXRv on first boot.


# iosxr_config_admin.txt
username netadmin
 group root-system
 secret 5 $1$e1b8$ui278OB/l4zjSy.DGekD31
!
          

# iosxr_config.txt
hostname xrv
domain name lab.local
!
username vagrant
 group root-system
 secret 5 $1$XGy4$JJtunYtdSVtT9/lcGe6K1.
!
aaa authorization exec default local
aaa authentication login default local
!
ssh server v2
ssh server netconf
ssh server logging
!
netconf agent tty
 session timeout 5
!
netconf-yang agent
 ssh
!
interface MgmtEth0/0/CPU0/0
 ipv4 address dhcp
 no shutdown
!
          

Create an ISO named xrconfig.iso with the mkisofs command that contains the iosxr_config_admin.txt and iosxr_config.txt files created earlier. The ISO will be mounted on boot and the bootstrap configuration will be applied.


mkisofs -o xrconfig.iso -l --iso-level 2 iosxr_config.txt iosxr_config_admin.txt

# output
I: -input-charset not specified, using utf-8 (detected in locale settings)
Total translation table size: 0
Total rockridge attributes bytes: 0
Total directory bytes: 0
Path table size(bytes): 10
Max brk space used 0
176 extents written (0 MB)
          

Launch the Cisco IOSXRv VM.


virt-install \
    --connect=qemu:///system \
    --name=ios-xrv \
    --cpu host \
    --arch=x86_64 \
    --vcpus=1 \
    --ram=4096 \
    --virt-type=kvm \
    --disk path=iosxrv-k9-demo-6.1.3.qcow2,device=disk,size=3,bus=ide \
    --disk path=xrconfig.iso,format=iso,device=cdrom \
    --network network=vagrant-libvirt,model=e1000 \
    --graphics none \
    --import
            

You will be automatically connected to the virtual console.


# output
                             GNU GRUB  version 2.00

 +--------------------------------------------------------------------------+
 |IOS XRv                                                                   |
 |                                                                          |
  Booting `IOS XRv'
.
.
<snip>
.
.
RP/0/0/CPU0:Jun  9 22:00:33.580 : cvac[171]: %MGBL-CVAC-4-CONFIG_DONE : Configuration was applied from file /cd0/iosxr_config_admin.txt. See /disk0:/cvac.log for more details.
RP/0/0/CPU0:Jun  9 22:00:34.700 : ifmgr[228]: %PKT_INFRA-LINK-3-UPDOWN : Interface MgmtEth0/0/CPU0/0, changed state to Down
RP/0/0/CPU0:Jun  9 22:00:34.730 : ifmgr[228]: %PKT_INFRA-LINK-3-UPDOWN : Interface MgmtEth0/0/CPU0/0, changed state to Up
RP/0/0/CPU0:Jun  9 22:00:38.779 : cvac[171]: %MGBL-CVAC-4-CONFIG_DONE : Configuration was applied from file /cd0/iosxr_config.txt. See /disk0:/cvac.log for more details.
.
.
<snip>
.
.

Please login with any configured user/password, or cisco/cisco


User Access Verification

Username:
          

Login with the username / password netadmin and generate ssh keys.


crypto key generate rsa

# output
Sat Jun  9 21:39:01.202 UTC
The name for the keys will be: the_default
  Choose the size of the key modulus in the range of 512 to 4096 for your General Purpose Keypair. Choosing a key modulus greater than 512 may take a few minutes.

How many bits in the modulus [2048]:
Generating RSA keys ...
Done w/ crypto generate keypair
[OK]

RP/0/0/CPU0:xrv#
          

Now check the IP address assigned to the management interface.


show int ip brie

# output
RP/0/0/CPU0:xrv#show ip int brie
Sat Jun  9 06:56:27.884 UTC

Interface                      IP-Address      Status          Protocol Vrf-Name
MgmtEth0/0/CPU0/0              192.168.121.212 Up              Up       default
          

From your host terminal confirm you can SSH to the IOSXRv VM with the username / password vagrant.


# host terminal
ssh vagrant@192.168.121.89

# now in IOSXRv VM
IMPORTANT:  READ CAREFULLY
Welcome to the Demo Version of Cisco IOS XRv (the "Software").
The Software is subject to and governed by the terms and conditions
of the End User License Agreement and the Supplemental End User
License Agreement accompanying the product, made available at the
time of your order, or posted on the Cisco website at
www.cisco.com/go/terms (collectively, the "Agreement").
As set forth more fully in the Agreement, use of the Software is
strictly limited to internal use in a non-production environment
solely for demonstration and evaluation purposes.  Downloading,
installing, or using the Software constitutes acceptance of the
Agreement, and you are binding yourself and the business entity
that you represent to the Agreement.  If you do not agree to all
of the terms of the Agreement, then Cisco is unwilling to license
the Software to you and (a) you may not download, install or use the
Software, and (b) you may return the Software as more fully set forth
in the Agreement.


Please login with any configured user/password, or cisco/cisco


vagrant@192.168.121.212's password: <vagrant>
          

Important

I was unable to successfully enable ssh-key based authentication, if I discover how to enable it I will update this post. If you have any details on enabling ssh-key based authentication on the IOSXRv demo image please feel free to reach out to me.

If you successfully connected, exit and power off the VM.

To exit the console press and hold CTRL and SHIFT while pressing 6 then ]

Now power off the VM.


virsh destroy ios-xrv

# output
Domain ios-xrv destroyed
          

Create a file called metadata.json with the following contents.


{"provider":"libvirt","format":"qcow2","virtual_size":4}
            

Use the previously downloaded script create_box.sh to create a vagrant box.


bash create_box.sh iosxrv-k9-demo-6.1.3.qcow2

# output
{4}
==> Creating box, tarring and gzipping
./metadata.json
./Vagrantfile
./box.img
Total bytes written: 431267840 (412MiB, 27MiB/s)
==> iosxrv-k9-demo-6.1.3.box created
==> You can now add the box:
==>   'vagrant box add iosxrv-k9-demo-6.1.3.box --name iosxrv-k9-demo-6.1.3'
            

Create a metadata file called xrv.json so that the box is added with the correct version number.


{
  "name": "cisco/xrv",
  "description": "Cisco IOSXRv",
  "versions": [
    {
      "version": "6.1.3",
      "providers": [
        {
          "name": "libvirt",
          "url": "file:///home/bradmin/vagrant/boxes/cisco/xrv/iosxrv-k9-demo-6.1.3.box"
        }
      ]
    }
  ]
}
          

Add the box to Vagrant.


vagrant box add xrv.json

# output
==> box: Loading metadata for box 'xrv.json'
    box: URL: file:///home/bradmin/vagrant/boxes/cisco/xrv/xrv.json
==> box: Adding box 'cisco/xrv' (v6.1.3) for provider: libvirt
    box: Unpacking necessary files from: file:///home/bradmin/vagrant/boxes/cisco/xrv/iosxrv-k9-demo-6.1.3.box
==> box: Successfully added box 'cisco/xrv' (v6.1.3) for 'libvirt'!
            

Confirm the box was added successfully


vagrant box list

# output
CumulusCommunity/cumulus-vx          (libvirt, 3.4.2)
arista/veos                          (libvirt, 4.20.1F)
cisco/asav                           (libvirt, 9.9.2)
cisco/csr1000v                       (libvirt, 03.15.00.S-155-2-S)
cisco/iosv                           (libvirt, 15.6-1-T)
cisco/xrv                            (libvirt, 6.1.3)
              

Testing

Now that we have the box installed lets create a Vagrantfile and confirm we can build VM's with Vagrant.

Create a test directory.


mkdir ~/xrv-test
cd ~/xrv-test
          

Add a Vagrantfile to the test directory with the following contents


# -*- mode: ruby -*-
# vi: set ft=ruby :

Vagrant.configure("2") do |config|
  config.vm.define "r01" do |node|
    node.vm.box = "cisco/xrv"

    # Turn off shared folders
    node.vm.synced_folder ".", "/vagrant", disabled: true

    # Do not try to insert new SSH key
    node.ssh.insert_key = false

    ## ssh key auth not working, need to use password
    node.ssh.password = "vagrant"

    # Give VM time to boot
    node.vm.boot_timeout = 180

    # Set guest type to prevent guest type detection
    node.vm.guest = :freebsd

    # Provider-specific configuration
    node.vm.provider :libvirt do |domain|
      domain.memory = 4096
      domain.cpus = 1
      domain.disk_bus = "ide"
      domain.driver = "kvm"
      domain.nic_model_type = "e1000"
    end
  end
end
            

Now vagrant up and confirm you can login.


vagrant up

# output
Bringing machine 'r01' up with 'libvirt' provider...
==> r01: Checking if box 'cisco/xrv' is up to date...
==> r01: Creating image (snapshot of base box volume).
==> r01: Creating domain with the following settings...
==> r01:  -- Name:              xrv_r01
==> r01:  -- Domain type:       kvm
==> r01:  -- Cpus:              1
==> r01:
==> r01:  -- Feature:           acpi
==> r01:  -- Feature:           apic
==> r01:  -- Feature:           pae
==> r01:  -- Memory:            4096M
==> r01:  -- Management MAC:
==> r01:  -- Loader:
==> r01:  -- Base box:          cisco/xrv
==> r01:  -- Storage pool:      default
==> r01:  -- Image:             /var/lib/libvirt/images/xrv_r01.img (4G)
==> r01:  -- Volume Cache:      default
==> r01:  -- Kernel:
==> r01:  -- Initrd:
==> r01:  -- Graphics Type:     vnc
==> r01:  -- Graphics Port:     -1
==> r01:  -- Graphics IP:       127.0.0.1
==> r01:  -- Graphics Password: Not defined
==> r01:  -- Video Type:        cirrus
==> r01:  -- Video VRAM:        9216
==> r01:  -- Sound Type:
==> r01:  -- Keymap:            en-us
==> r01:  -- TPM Path:
==> r01:  -- INPUT:             type=mouse, bus=ps2
==> r01: Creating shared folders metadata...
==> r01: Starting domain.
==> r01: Waiting for domain to get an IP address...
==> r01: Waiting for SSH to become available...
==> r01: Configuring and enabling network interfaces...
Guest-specific operations were attempted on a machine that is not
ready for guest communication. This should not happen and a bug
should be reported.
            

Note

The above error does not affect the operation of the Vagrant box and it is still perfectly usable. I will raise a bug in relation to this error with the Vagrant team.

Confirm you can login to the box with the password vagrant.


# Host terminal
vagrant ssh r01
==> r01: The machine you're attempting to SSH into is configured to use
==> r01: password-based authentication. Vagrant can't script entering the
==> r01: password for you. If you're prompted for a password, please enter
==> r01: the same password you have configured in the Vagrantfile.
vagrant@192.168.121.211's password: <vagrant>

# Now in vagrant box terminal
RP/0/0/CPU0:xrv#show version
Sat Jun  9 23:10:59.172 UTC

Cisco IOS XR Software, Version 6.1.3[Default]
Copyright (c) 2017 by Cisco Systems, Inc.

ROM: GRUB, Version 1.99(0), DEV RELEASE

xrv uptime is 4 minutes
System image file is "bootflash:disk0/xrvr-os-mbi-6.1.3/mbixrvr-rp.vm"

cisco IOS XRv Series (Intel 686 F6M13S2) processor with 4193791K bytes of memory.
Intel 686 F6M13S2 processor at 2814MHz, Revision 2.174
IOS XRv Chassis

1 Management Ethernet
97070k bytes of non-volatile configuration memory.
866M bytes of hard disk.
2321392k bytes of disk0: (Sector size 512 bytes).

Configuration register on node 0/0/CPU0 is 0x2102
Boot device on node 0/0/CPU0 is disk0:
Package active on node 0/0/CPU0:
iosxr-infra, V 6.1.3[Default], Cisco Systems, at disk0:iosxr-infra-6.1.3
    Built on Mon Feb 13 15:01:56 UTC 2017
    By iox-lnx-005 in /auto/srcarchive14/production/6.1.3/xrvr/workspace for pie
.
.
<snip>
.
.
RP/0/0/CPU0:xrv#
            

We can build and login to the box with Vagrant. Lastly, let clean up a bit.


# back in host shell
vagrant destroy -f

# output
==> r01: Removing domain...
          

Remove the original KVM image.


rm -f iosxrv-k9-demo-6.1.3.qcow2
virsh undefine ios-xrv

# output
Domain ios-xrv has been undefined
          

Summary

The Cisco IOSXRv qemu image was successfully converted to a Vagrant libvirt box, it is a bit quirky having to use a password to login to the box, I will endeavour to find a solution and update the post in the future. I suspect it has something to do with the demo image as the method for enabling ssh-key based authentication according to the documentation does not work.

Links

https://www.cisco.com/en/US/docs/ios_xr_sw/ios_xrv/install_config/b_xrvr_432_chapter_0100.html
http://networkgeekstuff.com/networking/cisco-ios-xr-complete-getting-started-examples-guide/#Login_and_access_privileges
https://supportforums.cisco.com/t5/network-infrastructure-documents/understanding-quot-commit-quot-command-in-ios-xr/ta-p/3154033
https://learningnetwork.cisco.com/thread/118981
https://github.com/ios-xr/iosxr-ansible/blob/master/README.md
https://xrdocs.io/application-hosting/tutorials/IOSXR-Ansible






















Published: 2018-06-10