Method to simulate multi interface in CPX container

Introduction

Laymen explanation

Technical explanation

In case, you want to create additional interface in a container multiple interface, this document can help.

Example YAML

Sample YAML where CPX starts with user controlled init

root@ubuntu-232:~/deepak# cat cpx_ns_cic.yaml | more

apiVersion: extensions/v1beta1

kind: DaemonSet

metadata:

name: cpx-ns

spec:

template:

metadata:

name: cpx-ns

labels:

app: cpx-ns

annotations:

NETSCALER_AS_APP: "True"

spec:

serviceAccountName: cpx

containers:

- name: cpx

image: "in-docker-reg.eng.citrite.net/cpx-dev/cpx:12.1-51.12"

command: [ "/bin/bash", "-c", "--" ]

args: [ "while true; do sleep 30; done;" ]

securityContext:

privileged: true

env:

- name: "EULA"

value: "yes"

- name: "KUBERNETES_TASK_ID"

value: ""

imagePullPolicy: Always

# Add cic as a sidecar

- name: cic

image: "in-docker-reg.eng.citrite.net/cic-dev/cic:latest"

env:

- name: "EULA"

value: "yes"

- name: "NS_IP"

value: "127.0.0.1"

- name: "NS_PROTOCOL"

value: "HTTP"

- name: "NS_PORT"

value: "80"

- name: "NS_DEPLOYMENT_MODE"

value: "SIDECAR"

- name: "NS_ENABLE_MONITORING"

value: "YES"

imagePullPolicy: Always

Steps

• • Apply above YAML

  • Enter to CPX shell

  • Configure a test interface as below

Commands used to create additional interface

root@cpx-ns-6x6pb:/# history

1 ps ax

2 ip addr show

3 ip link add test type veth peer name testp

4 ip link show

5 ip addr add 1.1.1.1/24 dev test

6 ip link show

7 ip addr show

8 history

• • Manually start CPX init

  • Check that CPX learned new interface

Example output

Text Box

root@ubuntu-232:~/deepak# kubectl get pods | grep cpx

cpx-ns-6x6pb 2/2 Running 1 17m

root@ubuntu-232:~/deepak# kubectl exec -it cpx-ns-6x6pb -c cpx bash

root@cpx-ns-6x6pb:/# cli_script.sh 'sh ns ip'

exec: sh ns ip

Ipaddress Traffic Domain Type Mode Arp Icmp Vserver State

--------- -------------- ---- ---- --- ---- ------- ------

1) 10.244.1.231 0 NetScaler IP Active Enabled Enabled NA Enabled

2) 192.0.0.1 0 SNIP Active Enabled Enabled NA Enabled

3) 1.1.1.1 0 SNIP Active Enabled Enabled NA Enabled

Done

root@cpx-ns-6x6pb:/#