eve-ng-tools

EVE-NG tools, A Utility to make operations with EVE-NG more friendly. Also it supports different snapshot operations with same style as Libvirt/KVM.

Also, this tool could be used to assist in migration from KVM to EVE-NG. Full details are described in the following blog post

https://basimaly.wordpress.com/2022/02/01/migrating-from-kvm-to-eve-ng/

Installation

The tool need to be hosted on the eve-ng server since it use some local commands to collect data. so please execute the below commands on the eve-ng server

Create virtualenv

# ubuntu
sudo apt-get install python3-pip -y
sudo pip3 install virtualenv

# RHEL 7/CentOS 8
sudo yum install python-virtualenv

# install virtualenv
virtualenv --python /usr/bin/python3  .venv # use python version > 3.5
source .venv/bin/activate

Clone Repo and install requirements

rm -rf ~/eve-ng-tools || true
git clone https://github.com/TheNetworker/eve-ng-tools.git
cd eve-ng-tools
pip install -r requirements.txt

Create lab env

cat << 'EOF' > /root/telco_lab.env 
for key in $( set | awk '{FS="="}  /^eve_/ {print $1}' ); do unset $key ; done
export eve_ip=192.168.100.252 #<-- Provide here the eve_ip address
export eve_user=admin #<-- Provide here your username
export eve_password=eve
export eve_lab_name=5G_Core_in_CSP.unl
export eve_lab_cnx_file="/root/5G_Core_in_CSP_CNX.yml"
export ignore_sat_check=False

EOF

source /root/telco_lab.env

[!IMPORTANT]

if you're working on EVE-NG environment with multiple users and pods, the tool will get the pod number and add it to the user_tenant vairbale to be used later in different operation

Working with eve-ng in cluster mode

The EVE-NG Professional edition supports adding multiple nodes to form a server cluster, also known as satellites, on which you can run your lab. EVE-NG will handle the connectivity between these clusters using WireGuard clients so they appear as a seamless connected on a same node although they're running on different ones.

Source: EVE-NG Cluster Presentation

However, this creates a problem when taking snapshots of nodes scheduled over those satellites, as eve-ng-tools expects the qcow2 files to be on the master node. Therefore, execute the commands below to remotely map the disk of /opt/unetlab/tmp/ at the satellite node(s) to the master server. If directories are not mapped, eve-ng-tools will raise an error and exit.

# create directory per satellite server (here we have three satellite servers)
mkdir -p /root/sats/{1,2,3}

# install the sshfs package on eve-ng master 
sudo apt install sshfs -y

# copy the root ssh id to satellite servers
ssh-copy-id root@192.168.8.240
ssh-copy-id root@192.168.8.230
ssh-copy-id root@192.168.8.220

# unmount directories if they're mounted previously
umount /root/sats/1
umount /root/sats/2
umount /root/sats/3

# remotely map the directory of sat1 (EX IP: 192.168.8.240)
sshfs -o allow_other,default_permissions -o reconnect -o cache=no -o identityfile=/root/.ssh/id_rsa root@192.168.8.240:/opt/unetlab/tmp/ /root/sats/1

# remotely map the directory of sat2 (EX IP: 192.168.8.230)
sshfs -o allow_other,default_permissions -o reconnect -o cache=no -o identityfile=/root/.ssh/id_rsa root@192.168.8.230:/opt/unetlab/tmp/ /root/sats/1

# remotely map the directory of sat3 (EX IP: 192.168.8.220)
sshfs -o allow_other,default_permissions -o reconnect -o cache=no -o identityfile=/root/.ssh/id_rsa root@192.168.8.220:/opt/unetlab/tmp/ /root/sats/3

[!WARNING]

You can temporarily set export ignore_sat_check=True in the lab env file to disable this checking in case one of satellite server is down but this will make the snapshot operation not working correctly.

[!NOTE]

You need to execute the same commands one more time if you rebooted the master node.

Supported Operations

Two operations are currently supported

• Lab operations
• Snapshot operations

Lab Operations:

python evetools.py lab -h
usage: eve lab [-h] [--describe | --rack_and_stack | --cnx_body CNX_BODY | --de_rack_and_stack | --get_ansible_data] [--action {start,stop,stop-then-start,wipe,list,init,get_console_port}]
               [--nodes NODES] [--flavor {apstra}] [--delay DELAY]

options:
  -h, --help            show this help message and exit
  --describe            Describe the lab
  --rack_and_stack      Connect the nodes with each other according to the topology file stored in env variable eve_lab_cnx_file
  --cnx_body CNX_BODY   provide the body of the connection request
  --de_rack_and_stack   disconnect the nodes from each other according to the topology file stored in env variable eve_lab_cnx_file
  --get_ansible_data    Get the data required by ansible playbooks to configure Day1 according to the topology file stored in env variable eve_lab_cnx_file

  --action {start,stop,stop-then-start,wipe,list,init,get_console_port}
                        Do operation over nodes
  --nodes NODES         list of nodes with comma separated
  --flavor {apstra}     provide the flavor of the lab mgmt solution
  --delay DELAY         provide the delay in seconds between each node operation

[1] Describe Lab

python evetools.py lab --describe 

[2] Start all nodes in the lab

python evetools.py lab --action start

[2-1] Start all nodes in the lab with a delay of 10 seconds to avoid CPU hogging

python evetools.py lab --action start --delay 10

[3] Stop some nodes (omit **--nodes** to stop all of them)

python evetools.py lab --action stop --nodes issu-0,issu-1

[4] Rack and Stack nodes

python evetools.py lab --rack_and_stack

This operation will read the connection file defined in lab env eve_lab_cnx_file (Please see file named 5G_Core_in_CSP_CNX.yml for an example of connection) and will connect them according to the cable plan. Very useful for architects exploring new design patterns or testing dramatic network changes. This operation is idempotent . meaning you can run it multiple times and you will get the same result at the end.

Please see the below demo fro more infomration

Watch Video Demo

CLI

Topology before the racking and stacking connection

Topology after the racking and stacking connection

[1] Please note the operation takes some time due to EVE-NG backend validation

[2] Important: Please don't login to EVE-NG GUI until this operation is finished to avoid interrupting the API

[5] Connect only one cable

python evetools.py lab '{json_payload}'

EX:
python evetools.py lab --cnx_body '{ "src_node": "IGW2_R21" , "dst_node": "IGWRR1_R34" , "src_intf": "ge-0/0/2" ,"dst_intf": "ge-0/0/2"}'

This feature is a subset for the previous feature and will only connect two nodes with a single connection. useful for adding missing connections without need to repeat pushing the full cable plan one more time.

[6] De-Rack and Stack nodes

python evetools.py lab --de_rack_and_stack

The opposite of previous feature, obviously!. it will remove the disconnect the nodes from each other this time

[7] Get Ansible Data

To be explained later

[8] Adjust Qcow2 VM size

To be explained later

[9] Support reading the connection details from Juniper Apstra Cabling Map

To be explained later

[10] Get the console port

python evetools.py lab --action get_console_port --nodes dcn1-leaf1   #node need to be powered-on

This could be used later in any EXPECT based script to configure the day0 configuration as in below

./eve_expect.sh vmx $(python evetools.py lab --action get_console_port --nodes vMX-VCP49 | grep -v '\->') 10.99.100.151/24

The Result

Snapshot operations

python evetools.py snapshot -h
usage: eve snapshot [-h] [--list] [--ops {create,revert,delete}] [--snapshot SNAPSHOT] [--nodes NODES]

options:
  -h, --help            show this help message and exit

  --list                list a snapshot

  --ops {create,revert,delete}
                        Create a snapshot
  --snapshot SNAPSHOT   snapshot name
  --nodes NODES         list of nodes with comma separated

[1] Listing Snapshots

python evetools.py snapshot --list

[2] Creating new snapshot

python evetools.py snapshot --ops create --snapshot test_the_snapshoting

[3] Deleting snapshots

python evetools.py snapshot --ops delete --snapshot test_the_snapshoting

[4] Reverting the snapshot

python evetools.py snapshot --ops revert --snapshot test_the_snapshoting

Questions/Discussion

If you find an issue with eve-tools, then you can open an issue on this projects issue page here: https://github.com/TheNetworker/eve-ng-tools/issues

Suggestion and Feedback

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