This is a DEMO project (thus, do not use in production environment) with the purpose of giving on overview on some example tools, methods and procedures focused on NetOps best practice.
This work is based on and is inspired by the beautiful work of networkop, in his repo https://github.com/networkop/arista-network-ci
We've tried to put everything together in an all-in-one stack deployment, from code to network devices, passing passing through automation playbooks, validation and testing.
It is important to say that this is not THE Solution (with capitol S), but a possible approach that can be helpful to understand the power of NetOps and give some initial spark to those who want to investigate this subject for the first time.
We focus on the main goals of NetOps methodology, in a closed-loop telemetry/automation model:
- Infrascruture as Code (aka IaC)
- Versioning
- Automation
- Monitoring
Below an architecture on our DEMO environment, the tools we have chosen and the connections between them:
 |
|---|
| NetOps Stack |
Note: All the tools in this architecture are deployed using Docker and Docker-compose
We are testing our environment with a simple 3-nodes Spine/Leaf topology. We have chosen rely on Arista technology beacuse of the flexibility and semplicity they provide. In fact we are using containerized EOS images in conjunctions with Docker-topo NG, a software that allows you to replicate a network topology using docker technologies.
We also added to Host nodes, one per Leaf, useful to test network connectivity if everything is ok.
We are using Gitlab for 2 reasons:
- GIT versioning
- for IaC definitions of network devices
- for automation playbooks
- Embedded DevOps functionality
- CI/CD Piepline triggers and definitions
Our Gitlab project is composed by:
- automation folder
- contains al Ansible-related files and folders
- config folder
- contains the YAML definitions of the 3 devices
- gitlab-ci.yml file
- describe the CI/CD process that take place on every change
The 3 network devices are described using YAML definitions, in order to respect Infrastructure as Code best practice, as follows:
## Leaf-1
interfaces:
- name: Ethernet1
ipv4: 10.0.254.1/31
routerid: 1.1.1.1/32
bgp:
asn: 65001
neighbours:
- ipv4: 10.0.254.0
remote_asn: 65100
vlan:
id: 10
svi: 192.168.10.1/24
interface: Ethernet10## Leaf-2
interfaces:
- name: Ethernet1
ipv4: 10.0.254.3/31
routerid: 1.1.1.2/32
bgp:
asn: 65002
neighbours:
- ipv4: 10.0.254.2
remote_asn: 65100
vlan:
id: 20
svi: 192.168.20.1/24
interface: Ethernet10## Spine-1
interfaces:
- name: Ethernet1
ipv4: 10.0.254.0/31
- name: Ethernet2
ipv4: 10.0.254.2/31
routerid: 1.1.1.100/32
bgp:
asn: 65100
neighbours:
- ipv4: 10.0.254.1
remote_asn: 65001
- ipv4: 10.0.254.3
remote_asn: 65002We make use of 3 simple, demostrative, Ansible playbooks to perform all the automation staff.
Note: Even the creating process of all the demo environment is built with Ansible
Ansible automation is launched by the Gitlan pipeline. We have devided all the stuff in 3 topics:
- Automatically launch validation processes
- playbooks/validate.yaml
- Auotmatically deploy configurations on devices, and configure the monitoring stack
- playbooks/intended.yaml
- Automatically test the final environment
- playbooks/ping.yaml
Inside the automation folder of this project you can find all files related to Ansible automation, regarding the NetOps process. We use some collections and roles to perform the tasks (as you can see in the requirements.yaml file):
- Collections:
- lvrfrc87.git_acp
- arista.eos
- Roles:
- batfish.base
As you can see, the host_vars folder is empty. It will be filled with IaC configuration declarations by the Gitlab pipeline.
The arista.eos collection is the key to perform configuration deployment on the devices
---
- name: Configure device
arista.eos.eos_config:
src: template-config-all.j2
replace: config
match: noneWe use a jinja2 template, filled with IaC variables, to get the final configuration
!
hostname {{ inventory_hostname }}
!
spanning-tree mode mstp
!
no aaa root
!
aaa authorization exec default local
!
username {{ management.username }} privilege 15 secret sha512 {{ management.password }}
!
ip access-list def2
9 permit tcp any any eq 8080
10 permit icmp any any
20 permit ip any any tracked
30 permit udp any any eq bfd ttl eq 255
40 permit udp any any eq bfd-echo ttl eq 254
50 permit udp any any eq multihop-bfd
60 permit udp any any eq micro-bfd
70 permit ospf any any
80 permit tcp any any eq ssh telnet www snmp bgp https msdp ldp netconf-ssh gnmi
90 permit udp any any eq bootps bootpc snmp rip ntp ldp
100 permit tcp any any eq mlag ttl eq 255
110 permit udp any any eq mlag ttl eq 255
120 permit vrrp any any
130 permit ahp any any
140 permit pim any any
150 permit igmp any any
160 permit tcp any any range 5900 5910
170 permit tcp any any range 50000 50100
180 permit udp any any range 51000 51100
190 permit tcp any any eq 3333
200 permit tcp any any eq nat ttl eq 255
210 permit tcp any eq bgp any
220 permit rsvp any any
exit
!
management api http-commands
no shutdown
exit
{% for intf in interfaces %}
!
interface {{ intf.name }}
no switchport
ip address {{ intf.ipv4 }}
exit
{% endfor %}
!
{% if vlan is defined %}
vlan {{ vlan.id }}
!
interface Vlan{{ vlan.id }}
ip address {{ vlan.svi }}
exit
!
interface {{ vlan.interface }}
switchport
switchport mode access
switchport access vlan {{ vlan.id }}
exit
{% endif %}
{% if bgp is defined %}
!
ip routing
!
route-map RMAP-CONNECTED-BGP permit 1000
!
interface Loopback0
description ROUTER-ID
ip address {{ routerid }}
exit
!
router bgp {{ bgp.asn }}
{% set rid = routerid.split('/') %}
router-id {{ rid[0] }}
{% for neighbor in bgp.neighbours %}
{% set peer_ip = neighbor.ipv4 | ipaddr('address') %}
neighbor {{ peer_ip }} remote-as {{ neighbor.remote_asn }}
neighbor {{ peer_ip }} send-community
neighbor {{ peer_ip }} maximum-routes 12000
{% endfor %}
redistribute connected route-map RMAP-CONNECTED-BGP
maximum-paths 2
exit
!
{% endif %}
!
system control-plane
ip access-group def2 in
exit
!
daemon TerminAttr
exec /usr/bin/TerminAttr -disableaaa
no shutdown
exit
!
daemon ocprometheus
exec /mnt/flash/ocprometheus -config /mnt/flash/ocprometheus.yml -addr localhost:6042
no shutdown
exit
!
logging host {{ logging_remote_host }} {{ logging_remote_port }} protocol tcp
logging format hostname fqdn
!
endBatfish is an open source network configuration analysis tool.
We have deployed a Batfish server inside our stack and we run some simple demostrative validation against it. As described before, we run this validations using Ansible automation.
For example, we want to validate BGP neighbourship
- name: Generate intended config to test
template:
src: config.j2
dest: "validation/workshop/configs/{{inventory_hostname}}"
- name: Setup connection to Batfish service
bf_session:
host: localhost
name: local_batfish
delegate_to: localhost
run_once: true
- name: Initialize the example network
bf_init_snapshot:
network: workshop
snapshot: workshop
snapshot_data: ../validation/workshop
overwrite: true
run_once: true
delegate_to: localhost
- name: Retrieve Batfish Facts
bf_extract_facts:
output_directory: ../validation/workshop/data/bf_facts
register: bf_facts
run_once: true
delegate_to: localhost
- name: Display neighbourships for all nodes
debug:
msg: " {{item.value.BGP.Neighbors}} "
with_dict: "{{bf_facts.result.nodes}}"
loop_control:
label: "{{item.key}}.BGP.Neighbors"
run_once: true
delegate_to: localhost
- name: Validate the configuration of network devices
bf_assert:
assertions:
- type: assert_no_undefined_references
name: Confirm that there are NO undefined references on any network device
- type: assert_no_incompatible_bgp_sessions
name: Confirm that all BGP peers are properly configured
- type: assert_no_unestablished_bgp_sessions
name: Confirm that all compatible BGP peers establish sessions
run_once: true
delegate_to: localhostWe have introduced Consul simply to simulate a service discovery component inside our automation stack.
This kind of objects are very usefull when we have to deal with automation tasks. In this way, within the intended.yaml playbook, we can register a device to be monitored by the monitoring tools without specify any further configuration inside Prometheus
---
- name: Register Consul service
community.general.consul:
service_name: "Arista Monitoring"
service_port: "{{ metrics_port }}"
service_id: "{{ inventory_hostname }}"
service_address: "{{ ansible_host }}"
host: "{{ consul_host }}"
tags:
- "_device={{ inventory_hostname }}"Prometheus itself has a service discovery plugin to be able to get hosts from registered device inside Consul.
Finally, as a complete Monitoring/Telemetry/Log aggregation stack we have chosen:
- Prometheus
- scrapes metrics information of the Arista devices, both directly (thanks to OCPrometheus daemon inside EOS) and via custom eAPI exporter (just for demonstration sake, it is absolutely not necessary to run both mechanisms)
- Loki
- Grafana
- provides visualization dashboards
 |
|---|
| CI/CD Pipeline detail |
| We use the default CI/CD mechanism inside Gitlab to perform the pipeline process. |
Therefore we provide a simple .gitlab-ci.yml file that describes all the stages
stages:
- validate
- deploy
- test
batfish-validation:
stage: validate
script:
- chmod 755 automation
- cp configs/*.yml automation/host_vars/
- cd automation
- ansible-galaxy install -r requirements.yml
- ansible-playbook -e 'ansible_python_interpreter=/usr/bin/python3' playbooks/validate.yaml
deploy-configurations:
stage: deploy
script:
- chmod 755 automation
- cp configs/*.yml automation/host_vars/
- cd automation
- ansible-galaxy install -r requirements.yml
- ansible-playbook -e 'ansible_python_interpreter=/usr/bin/python3' playbooks/intended.yaml
ping-test:
stage: test
script:
- chmod 755 automation
- cp configs/*.yml automation/host_vars/
- cd automation
- chmod 400 demo.key
- ansible-galaxy install -r requirements.yml
- ansible-playbook -e 'ansible_python_interpreter=/usr/bin/python3' playbooks/ping.yamlWe have build a custom docker image that the runner can use to perform tasks inside stages. It containes all the softwares necessary.
You can run all the demo environment inside a single Linux-based host.
We recommend to use a not-too-old linux distribution, with at least 4 CPUs and 16GB RAM.
This softwares has to be present before launch the installation:
- python3
- pip3
- Python virtualenv
- docker
First clone this repository on your server and chanage directory inside the root.
Then create the virtualenv and install all the python requirements (this action could takes long to finish)
foo@bar:~$ cd netops-quickstart
foo@bar:~$ virtualenv .venv
foo@bar:~$ source .venv/bin/activate
(.venv)foo@bar:~$ cd build
(.venv)foo@bar:~$ pip install -r requirements.txtDownload from Arista portal the latest cEOS images and put it inside the topology folder, with the name cEOS-Lab.tar.xz
(.venv)foo@bar:~$ ls -al topology
total 391776
drwxrwxr-x 4 ubuntu ubuntu 4096 May 7 15:17 .
drwxrwxr-x 8 ubuntu ubuntu 4096 May 7 14:28 ..
drwxrwxr-x 2 ubuntu ubuntu 4096 May 7 15:15 alpine-host
-rw-r--r-- 1 ubuntu ubuntu 401152996 May 7 15:13 cEOS-Lab.tar.xz
drwxrwxr-x 2 ubuntu ubuntu 4096 May 7 15:17 configs
-rw-rw-r-- 1 ubuntu ubuntu 638 May 7 14:28 topology.yamlNow within the virtual environment you can launch Ansible automation that builds all the infrastructure (it will takes approximately 7/8 minutes)
(.venv)foo@bar:~$ ansible-playbook build.yml
PLAY [lab] *************************************************************************************************************************************************************************
TASK [build : Generate SSH key pair for Hosts in topology] *************************************************************************************************************************
changed: [Spine-1]
TASK [build : Build Host docker image] *********************************************************************************************************************************************
changed: [Spine-1]
TASK [build : Import & Build cEOS image] *******************************************************************************************************************************************
changed: [Spine-1]
TASK [build : Generate Arista configuration from templates] ************************************************************************************************************************
changed: [Spine-1]
changed: [Leaf-1]
changed: [Leaf-2]
TASK [build : Start Arista topology] ***********************************************************************************************************************************************
changed: [Spine-1]
TASK [build : Pause for 30 seconds to topology creation] ***************************************************************************************************************************
Pausing for 30 seconds
(ctrl+C then 'C' = continue early, ctrl+C then 'A' = abort)
ok: [Spine-1]
TASK [build : Copy OCPrometheus binary and configuration] **************************************************************************************************************************
changed: [Spine-1]
changed: [Leaf-1]
changed: [Leaf-2]
TASK [build : Pause for 90 seconds to topology up & running] ***********************************************************************************************************************
Pausing for 90 seconds
(ctrl+C then 'C' = continue early, ctrl+C then 'A' = abort)
ok: [Spine-1]
TASK [build : Build Network CI/CD docker image for Gitlab Runner] ******************************************************************************************************************
changed: [Spine-1]
TASK [build : Start all stack architecture] ****************************************************************************************************************************************
changed: [Spine-1]
TASK [build : Pause for 3 minutes, waiting for the stack comes up] *****************************************************************************************************************
Pausing for 180 seconds
(ctrl+C then 'C' = continue early, ctrl+C then 'A' = abort)
ok: [Spine-1]
TASK [build : Register Gitlab Runner] **********************************************************************************************************************************************
changed: [Spine-1]
PLAY RECAP *************************************************************************************************************************************************************************
Leaf-1 : ok=2 changed=2 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
Leaf-2 : ok=2 changed=2 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
Spine-1 : ok=12 changed=9 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
At the end of the playbook you will have this situation
(.venv)foo@bar:~$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
605125504e40 grafana/loki:latest "/usr/bin/loki -conf…" 5 minutes ago Up 5 minutes 0.0.0.0:3100->3100/tcp, :::3100->3100/tcp loki
54d06e721082 prom/prometheus:latest "/bin/prometheus --w…" 5 minutes ago Up 5 minutes 0.0.0.0:9090->9090/tcp, :::9090->9090/tcp prometheus
49a918ab0d36 arista-eapi-exporter "python -u ./main.py" 5 minutes ago Up 5 minutes 0.0.0.0:9200->9200/tcp, :::9200->9200/tcp arista-eapi-exporter
01c192a0744b gitlab/gitlab-ce:latest "/assets/wrapper" 5 minutes ago Up 5 minutes (healthy) 80/tcp, 443/tcp, 0.0.0.0:8822->22/tcp, :::8822->22/tcp, 0.0.0.0:8888->9080/tcp, :::8888->9080/tcp gitlab-lab
1785c34d6fec gitlab/gitlab-runner:latest "/usr/bin/dumb-init …" 5 minutes ago Up 5 minutes runner-lab
9af5d52d0f5f grafana/grafana:latest "/run.sh" 5 minutes ago Up 5 minutes 0.0.0.0:3000->3000/tcp, :::3000->3000/tcp grafana
acc1d7780a5d batfish/allinone "./wrapper.sh" 5 minutes ago Up 5 minutes 8888/tcp, 0.0.0.0:9996-9998->9996-9998/tcp, :::9996-9998->9996-9998/tcp batfish
f81482213ebb bitnami/consul:1-debian-10 "/opt/bitnami/script…" 5 minutes ago Up 5 minutes 0.0.0.0:8300-8301->8300-8301/tcp, :::8300-8301->8300-8301/tcp, 0.0.0.0:8500->8500/tcp, 0.0.0.0:8301->8301/udp, :::8500->8500/tcp, :::8301->8301/udp, 0.0.0.0:8600->8600/tcp, :::8600->8600/tcp, 0.0.0.0:8600->8600/udp, :::8600->8600/udp consul
f9690138a56e balabit/syslog-ng "/usr/sbin/syslog-ng…" 5 minutes ago Up 5 minutes (healthy) 601/tcp, 514/udp, 6514/tcp, 0.0.0.0:51400->514/tcp, :::51400->514/tcp syslog-ng
6d81eb4cf9b4 grafana/promtail:latest "/usr/bin/promtail -…" 5 minutes ago Up 5 minutes 0.0.0.0:9080->9080/tcp, :::9080->9080/tcp, 0.0.0.0:15140->1514/tcp, :::15140->1514/tcp promtail
07d00af9fd15 alpine-host:latest "/home/alpine/entryp…" 12 minutes ago Up 12 minutes 0.0.0.0:2001->22/tcp, :::2001->22/tcp, 0.0.0.0:8001->443/tcp, :::8001->443/tcp, 0.0.0.0:8881->8080/tcp, :::8881->8080/tcp lab_Host-2
73f42929556d alpine-host:latest "/home/alpine/entryp…" 12 minutes ago Up 12 minutes 0.0.0.0:2000->22/tcp, :::2000->22/tcp, 0.0.0.0:8000->443/tcp, :::8000->443/tcp, 0.0.0.0:8880->8080/tcp, :::8880->8080/tcp lab_Host-1
b5b11322bbde ceos:latest "/sbin/init systemd.…" 12 minutes ago Up 12 minutes 0.0.0.0:2004->22/tcp, :::2004->22/tcp, 0.0.0.0:8004->443/tcp, :::8004->443/tcp, 0.0.0.0:8884->8080/tcp, :::8884->8080/tcp lab_Spine-1
1823eb54a25f ceos:latest "/sbin/init systemd.…" 12 minutes ago Up 12 minutes 0.0.0.0:2003->22/tcp, :::2003->22/tcp, 0.0.0.0:8003->443/tcp, :::8003->443/tcp, 0.0.0.0:8883->8080/tcp, :::8883->8080/tcp lab_Leaf-2
03646ccf2cf6 ceos:latest "/sbin/init systemd.…" 12 minutes ago Up 12 minutes 0.0.0.0:2002->22/tcp, :::2002->22/tcp, 0.0.0.0:8002->443/tcp, :::8002->443/tcp, 0.0.0.0:8882->8080/tcp, :::8882->8080/tcp lab_Leaf-1Now that the whole stack is up&running you can easily check if you can access this endpoints:
- Gitlab server
- http://<ip address of your server>:8888
- user: root
- password: NetOpsVista21!
- Grafana
- http://<ip address of your server>:3000
- user: admin
- password: NetOps
- Prometheus UI
- http://<ip address of your server>:9090
- Consul UI
- http://<ip address of your server>:8500
You can also access the 2 fake Hosts attached to Leafs, and check that ping between them is not working right now
(.venv)foo@bar:~$ docker exec -it lab_Host-1 /bin/sh
/ $ sudo ping 192.168.20.20
PING 192.168.20.20 (192.168.20.20): 56 data bytes
^C
--- 192.168.20.20 ping statistics ---
13 packets transmitted, 0 packets received, 100% packet loss
/ $So, that means we still have to configure a lot of stuff on Arista devices... (no BGP configuration means no neighbourship means no network reachability between Hosts)
Also, accessing Grafana dashboard, you will see blank data
 |
|---|
| Grafana empty dashboard |
Let's start by creating our GIT project and prepare everything to deploy correct configurations on devices.
 |
|---|
| Login to Gitlab server |
 |
|---|
| Create a new project |
 |
|---|
| Fill project info |
 |
|---|
| TADAAA! |
Now you can clone your brand new repository and start adding stuff to you project.
foo@bar:~$ cd
foo@bar:~$ git clone http://\<ip address of your server\>:8888/root/netops.git
Cloning into 'netops'...
Username for 'http://54.38.137.252:8888': root
Password for 'http://root@54.38.137.252:8888':
remote: Enumerating objects: 3, done.
remote: Total 3 (delta 0), reused 0 (delta 0), pack-reused 3
Unpacking objects: 100% (3/3), 224 bytes | 224.00 KiB/s, done.
foo@bar:~$ cd netops
foo@bar:~$ ls -al
total 16
drwxrwxr-x 3 ubuntu ubuntu 4096 May 11 13:09 .
drwxr-xr-x 9 ubuntu ubuntu 4096 May 11 13:09 ..
drwxrwxr-x 8 ubuntu ubuntu 4096 May 11 13:09 .git
-rw-rw-r-- 1 ubuntu ubuntu 36 May 11 13:09 README.mdNow you can copy some files and folder from this demo repo to the new repo, as follows
foo@bar:~$ cd
foo@bar:~$ cp netops-quickstart/gitlab-ci.yml netops/.gitlab-ci.yml
foo@bar:~$ cp -r netops-quickstart/{configs,automation} netops/
foo@bar:~$ cd netops
foo@bar:~$ ls -al
total 28
drwxrwxr-x 5 ubuntu ubuntu 4096 May 11 13:15 .
drwxr-xr-x 9 ubuntu ubuntu 4096 May 11 13:09 ..
drwxrwxr-x 8 ubuntu ubuntu 4096 May 11 13:09 .git
-rw-rw-r-- 1 ubuntu ubuntu 996 May 11 13:15 .gitlab-ci.yml
-rw-rw-r-- 1 ubuntu ubuntu 36 May 11 13:09 README.md
drwxrwxr-x 7 ubuntu ubuntu 4096 May 11 13:15 automation
drwxrwxr-x 2 ubuntu ubuntu 4096 May 11 13:15 configsOne little small change: you need to insert your demo server IP address inside the inventory
lab:
vars:
ansible_connection: network_cli
ansible_network_os: eos
ansible_user: arista
ansible_httpapi_pass: arista
ansible_ssh_pass: arista
ansible_password: arista
ansible_become: true
ansible_become_method: enable
ansible_httpapi_use_ssl: true
ansible_httpapi_validate_certs: false
logging_remote_host: <insert your server IP here> #INSERT YOUR IP HERE!
logging_remote_port: 51400
consul_host: consul
children:
Spines:
hosts:
Spine-1
Leafs:
hosts:
Leaf-1
Leaf-2
testing:
vars:
ansible_become: true
ansible_user: alpine
ansible_ssh_private_key_file: demo.key
children:
alpine:
hosts:
Host-1:
ip_to_ping: 192.168.20.20
Host-2:
ip_to_ping: 192.168.10.10Now it's time to add, commit and push!
foo@bar:~$ git config user.email "admin@example.com"
foo@bar:~$ git config user.name "Administrator"
foo@bar:~$ git add .
foo@bar:~$ git status
On branch master
Your branch is up to date with 'origin/master'.
Changes to be committed:
(use "git restore --staged <file>..." to unstage)
new file: .gitlab-ci.yml
new file: automation/.gitignore
new file: automation/ansible.cfg
new file: automation/collections/.gitignore
new file: automation/host_vars/.gitignore
new file: automation/inventory.yml
new file: automation/playbooks/intended.yaml
new file: automation/playbooks/ping.yaml
new file: automation/playbooks/validate.yaml
new file: automation/requirements.yml
new file: automation/roles/deploy/defaults/main.yml
new file: automation/roles/deploy/tasks/main.yml
new file: automation/roles/deploy/templates/template-config-all.j2
new file: automation/roles/monitoring/tasks/main.yml
new file: automation/roles/validate/defaults/main.yml
new file: automation/roles/validate/tasks/main.yml
new file: automation/roles/validate/templates/config.j2
new file: automation/validation/workshop/configs/.gitignore
new file: automation/validation/workshop/data/bf_facts/.gitignore
new file: configs/Leaf-1.yml
new file: configs/Leaf-2.yml
new file: configs/Spine-1.yml
foo@bar:~$ git commit -m "First commit"
foo@bar:~$ git push
Username for 'http://54.38.137.252:8888': root
Password for 'http://root@54.38.137.252:8888':
Enumerating objects: 42, done.
Counting objects: 100% (42/42), done.
Delta compression using up to 8 threads
Compressing objects: 100% (28/28), done.
Writing objects: 100% (41/41), 5.68 KiB | 969.00 KiB/s, done.
Total 41 (delta 3), reused 0 (delta 0)
To http://54.38.137.252:8888/root/netops.git
aabc023..c155808 master -> masterAfter the push, he CI/CD pipeline will take place
 |
|---|
| Gitlab CI/CD Pipeline started |
 |
|---|
| Gitlab CI/CD Pipeline stages, in progress |
 |
|---|
| Gitlab CI/CD Pipeline stages, finished successfully |
We can see the detail of the last stage, where Host-1 and Host-2 can ping each others
 |
|---|
| Gitlab CI/CD Pipeline stages output |
We can also check from docker cli that now the 2 Hosts ping each others
(.venv)foo@bar:~$ docker exec -it lab_Host-1 /bin/sh
/ $ sudo ping 192.168.20.20
PING 192.168.20.20 (192.168.20.20): 56 data bytes
64 bytes from 192.168.20.20: seq=0 ttl=61 time=10.994 ms
64 bytes from 192.168.20.20: seq=1 ttl=61 time=9.132 ms
64 bytes from 192.168.20.20: seq=2 ttl=61 time=8.530 ms
64 bytes from 192.168.20.20: seq=3 ttl=61 time=7.020 ms
64 bytes from 192.168.20.20: seq=4 ttl=61 time=7.871 ms
64 bytes from 192.168.20.20: seq=5 ttl=61 time=6.509 ms
^C
--- 192.168.20.20 ping statistics ---
6 packets transmitted, 6 packets received, 0% packet loss
round-trip min/avg/max = 6.509/8.342/10.994 msAlso Grafana dashboard now show some data and logs
 |
|---|
| Grafana |
Now, let's try to voluntarily insert wrong data on IaC side. For example we could change an IP address on Leaf-2
 |
|---|
| Insert a wrong IP (10.0.154.2 on the BGP configuration of Leaf-2) |
The excpected behaviour is to fail the first validation step of the CI?CD pipeline.
And in fact here it is
 |
|---|
| Failed on Validation stage |
 |
|---|
| Failed on Validation stage, details |
So it's working! Validation stage prevent something broken to arrive to production environment.
If you're tired of the playground you can simply clean all up by running an Ansible playbook
(.venv)foo@bar:~$ cd netops-quickstart/build
(.venv)foo@bar:~$ ansible-playbook clean_up.yml
PLAY [lab] ***********************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************
TASK [Destroy Arista topology] ***************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************
changed: [Spine-1]
TASK [Destroy the stack] *********************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************
changed: [Spine-1]
TASK [Prune docker stack] ********************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************
changed: [Spine-1]
PLAY RECAP ***********************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************
Spine-1 : ok=3 changed=3 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0