Linux network loss

Linux network loss injects chaos to disrupt network connectivity on the Linux machine by blocking the network requests.

Use cases

• Induces network loss on the target Linux machines.
• Simulates loss of connectivity access by blocking the network requests on the machine.

note

• This fault can be executed on Ubuntu 16 or higher, Debian 10 or higher, CentOS 7 or higher, RHEL 7 or higher, Fedora 30 or higher, and openSUSE LEAP 15.4 or higher.
• The linux-chaos-infrastructure systemd service should be in an active state, and the infrastructure should be in CONNECTED state.

Fault permissions

The fault uses the root Linux user and root user group.

Fault tunables

Mandatory tunables

Tunable	Description	Notes
networkInterface	The network interface to target.	For example: eth0

Optional tunables

Tunable	Description	Notes
destinationHosts	List of the target host names or keywords. For example: ["google.com","litmuschaos.io"]	If neither destinationHosts nor destinationIPs is provided, all host names/domains are targeted
destinationIPs	List of the target IPs. For example: ["1.1.1.1","8.8.8.8"]	If neither destinationHosts nor destinationIPs is provided, all host names/domains are targeted
packetLossPercentage	Percentage of packet loss. For example: 100	Default: 100%
networkInterface	The network interface to target. For example: eth0
duration	Duration through which chaos is injected into the target resource (in seconds).	Default: 30s
rampTime	Period to wait before and after injecting chaos (in seconds).	Default: 0s

Destination hosts

The destinationHosts input variable subjects the comma-separated names of the target hosts to chaos.

The following YAML snippet illustrates the use of this environment variable:

apiVersion: litmuchaos.io/v1alpha1
kind: LinuxFault
metadata:
  name: linux-network-loss
  labels:
    name: network-loss
spec:
  networkChaos/inputs:
    destinationHosts: '["google.com"]'
    networkInterface: "eth0"

Destination IPs

The destinationIPs input variable subjects the comma-separated names of the target IPs to chaos.

The following YAML snippet illustrates the use of this environment variable:

apiVersion: litmuchaos.io/v1alpha1
kind: LinuxFault
metadata:
  name: linux-network-loss
  labels:
    name: network-loss
spec:
  networkChaos/inputs:
    destinationIPs: '["1.1.1.1"]'
    networkInterface: "eth0"

Packet loss percentage

The packetLossPercentage input variable loses a specific percentage of the data packets.

The following YAML snippet illustrates the use of this environment variable:

apiVersion: litmuchaos.io/v1alpha1
kind: LinuxFault
metadata:
  name: linux-network-loss
  labels:
    name: network-loss
spec:
  networkChaos/inputs:
    packetLossPercentage: '50'
    networkInterface: "eth0"