Deploy a fixed test network in OSM

[qarawlus]

Deploy a test network in OSM so that we can know the right configuration. The network should consist of the following:

• One VNF: Any VNF should do here. Perhaps Suricata as it will be the one we will use for testing our code and driver connection to OSM.
• Two probes: One probe should be on the input side of the VNF, the other should be on the output side. A simple probe here will do more than fine. Any container or VM having TCPreplay or iperf that dumps traffic through the main VNF. The source VNF should be the originator of traffic, and the sink should collect the information that gets passed through.

The purpose of this issue is to be familiar with creating a valid and correct OSM topology that we can then later use to create a correct topology using tng-bench that allows the probes to correctly connect to the main VNF or VNF chain and generate correct benchmarking results.

DEADLINE: 13.09.2019 Please finish the issue before the deadline.

[qarawlus]

@Harshita-Puri @bsharma021 If you have questions on OSM login and usage, contact me or @avimehenwal.

[qarawlus]

Also, please update the project board by moving this issue to 'In progress' when you start working on it.

[Harshita-Puri]

A dummy network of "1 VNF 2 Probe" network with "cirros-VM".

[bsharma021]

We can see the IP addresses for connection points for VNFs in "OSM GUI - VNF Instances - Show Info in Action Tab". This can also be done programmatically by fetching VNF Info.

[qarawlus]

This seems to be a blocking issue with now a much higher priority as we have discovered more problems than we thought. I assigned myself to this issue so that we can work on it faster and solve issues with Openstack instances not being reached from outside network.

[qarawlus]

Fixed the connection problem with Openstack. I set up a default route rule inside the linux box, and added a masquerade rule to IPTables. I also setup floating IPs correctly, and set up SSH for accessing as a jump server.

Next step is to play with VNFD and NSD configs and see what can and can't be done. @bsharma021 @Harshita-Puri I believe you can now begin modifying the cirros example to test what can be done. The hackfest is using a charm that I cannot correctly understand right now, I must look into it and test why it is not deploying correctly. Working on cirros should work in the meantime.

[bsharma021]

The new network is established with public management access and can be accessed by doing ssh to it.

[bsharma021]

Any additional interfaces being assigned through OSM can now be activated using cloud-init scripts. The following script can be used to enable a specific interface "ens4" in cirros example.

#cloud-config
password: osm4u
chpasswd: { expire: False }
ssh_pwauth: True
datasource:
    OpenStack:
        metadata_urls: ["http://169.254.169.254"]
        max_wait: -1
        timeout: 10
        retries: 5
        apply_network_config: True

runcmd:
-   [ "dhclient", "ens4"]

[bsharma021]

The same work can be automated using the following script for enabling all interfaces.

#cloud-config
password: osm4u
chpasswd: { expire: False }
ssh_pwauth: True
datasource:
    OpenStack:
        metadata_urls: ["http://169.254.169.254"]
        max_wait: -1
        timeout: 10
        retries: 5
        apply_network_config: True
write_files:
-   content: |
        #!/bin/bash
        hname=$(hostname)
        cat /etc/hosts | grep $hname >> /dev/null
        if [ $? -ne 0 ];then
        sudo bash -c "echo '127.0.0.1 $hname' >> /etc/hosts"
        fi
        netfile=$(find /etc/network/interfaces.d -name "*.cfg")
        for interface in $(ls -1 /sys/class/net | grep ens) ;do
            cat $netfile | grep $interface >> /dev/null
            if [ $? -ne 0 ];then
                sudo bash -c "echo 'auto $interface' >> ${netfile}"
                sudo bash -c "echo 'iface $interface inet dhcp' >> ${netfile}"
                sudo ifup $interface
            fi
        done
    owner: ubuntu:ubuntu
    permissions: '0644'
    path: /home/ubuntu/script.sh

runcmd:
-   [ "chmod", "u+x", "/home/ubuntu/script.sh"]
-   [ "/home/ubuntu/script.sh" ]