> For the complete documentation index, see [llms.txt](https://developer.harness.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.harness.io/resilience-testing/chaos-engineering/faults/chaos-fault-categories/linux/permissions.md).

# Requirements

This topic describes the [resource permissions](#resource-consumption), [fault compatibility matrix](#fault-compatibility-matrix), and the [permissions](#on-premise-vms-vmware-vms) required to execute Linux chaos experiments.

### Resource consumption <a href="#resource-consumption" id="resource-consumption"></a>

The infrastructure consumes minimal system resources in an idle state, when no experiment is being executed. For example, in a GCP e2-micro VM instance with **2 vCPU** and **1 GB** of memory that runs **Ubuntu 22.04** operating system, the average resource consumption was found to be as follows:

* **CPU usage:** 0.05%
* **Memory usage:** 1.5%
* **Disk storage consumption:** 25 MB
* **Bandwidth consumption:** 0.15 KB/s

### Fault compatibility matrix <a href="#fault-compatibility-matrix" id="fault-compatibility-matrix"></a>

The faults have been tested for compatibility in the following Linux OS distributions:

|                                                 | Stress faults (cpu, memory, disk IO) | Network faults (loss, latency, corruption, duplication) | DNS faults (error, spoof) | Process faults (process kill, service restart) | Time chaos | Disk fill |
| ----------------------------------------------- | ------------------------------------ | ------------------------------------------------------- | ------------------------- | ---------------------------------------------- | ---------- | --------- |
| Ubuntu 16+                                      | ✓                                    | ✓                                                       | ✓                         | ✓                                              | ✓          | ✓         |
| Debian 10+                                      | ✓                                    | ✓                                                       | ✓                         | ✓                                              | ✓          | ✓         |
| CentOS 7+                                       | ✓                                    | ✓                                                       | ✓                         | ✓                                              | ✓          | ✓         |
| RHEL 7+                                         | ✓                                    | ✓                                                       | ✓                         | ✓                                              | ✓          | ✓         |
| Fedora 30+                                      | ✓                                    | ✓                                                       | ✓                         | ✓                                              | ✓          | ✓         |
| openSUSE LEAP 15.4+ / SUSE Linux Enterprise 15+ | ✓                                    | ✓                                                       | ✓                         | ✓                                              | ✓          | ✓         |

### On-premise VMs (VMware VMs) <a href="#on-premise-vms-vmware-vms" id="on-premise-vms-vmware-vms"></a>

#### Linux OS <a href="#linux-os" id="linux-os"></a>

|                                                    |                                                                                                                                                                                                                                                                                                                                                                                                                              |
| -------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Chaos agent deployment model                       | Native Chaos Agent on Each VM (system service within Target Linux Machine)                                                                                                                                                                                                                                                                                                                                                   |
| Connectivity requirements from agent               | <ul><li>Outbound over port 443 to Harness from VM.</li><li>Outbound to application health endpoints (ones which will be used for resilience validation) from VM</li></ul>                                                                                                                                                                                                                                                    |
| Connectivity requirements from VM/cluster/app      | <ul><li>Application and chaos agent co-exist on the same VM.</li></ul>                                                                                                                                                                                                                                                                                                                                                       |
| Access requirements for agent install              | <ul><li>Install agent as root user.</li></ul>                                                                                                                                                                                                                                                                                                                                                                                |
| Access requirements for basic chaos experiments    | <ul><li>Run experiments with non-root user.</li></ul>                                                                                                                                                                                                                                                                                                                                                                        |
| Access requirements for advanced chaos experiments | <ul><li>Run experiments with non-root user.</li></ul>                                                                                                                                                                                                                                                                                                                                                                        |
| Supported chaos faults                             | <ul><li><a href="https://github.com/hce-docs/platform-wise-chaos-info/blob/main/VMware/LinuxOS/basic-chaos-faults-supported-by-linux-infra-running-as-non-root.md">Basic faults with non-root agent</a></li><li><a href="https://github.com/hce-docs/platform-wise-chaos-info/blob/main/VMware/LinuxOS/all-supported-chaos-faults-by-linux-infra-running-as-root.md">Basic and advanced faults with root agent</a></li></ul> |