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netnsplan

netnsplan is a tool for easily setting up and managing complex network environments using Linux's network namespaces (netns). Network configurations are defined using YAML files, and the netnsplan command is used to apply and manage these configurations.

Key Features

  • Configuration via YAML: Network settings are defined in a YAML file, enabling high readability and manageability. The configuration file is similar to netplan, allowing for easy network configuration.
  • Network Namespace Management: Supports the creation, configuration, and deletion of multiple network namespaces.
  • Flexible Network Configuration: Supports configuration of physical devices, dummy interfaces (dummy devices), and Veth devices, as well as address assignment and routing settings.
  • Execution of Arbitrary Scripts: Allows for the execution of any script on the network namespace after applying network settings.

Usage

Preparing the Configuration File

Network settings are defined by YAML files. By default, netnsplan reads all YAML files (*.yaml) under /etc/netnsplan, merges them, and applies the settings based on the merged result. Below is an example of the configuration. The file name is set as /etc/netnsplan/example.yaml.

# /etc/netnsplan/example.yaml
netns:
  ns1:
    ethernets:
      eth0:
        addresses:
          - 10.1.0.1/24
    dummy-devices:
      dummy0:
        addresses:
          - 10.2.0.1/24
    veth-devices:
      veth0:
        addresses:
          - 10.3.0.1/24
        peer:
          name: veth1
          netns: ns2
          addresses:
            - 10.3.0.2/24

In this configuration, two network namespaces, ns1 and ns2, are created, each with different network interfaces configured.

Executing Commands

To apply network namespaces and network settings based on the configuration file, execute the following command:

netnsplan apply

Deleting Network Namespaces

To delete the created network namespaces, execute the following command:

netnsplan destroy

Installation

deb package

VERSION=$(wget -q -O- https://api.github.com/repos/buty4649/netnsplan/releases/latest | grep tag_name | cut -d '"' -f 4 | tr -d v)
case $(uname -m) in x86_64) ARCH=amd64;; aarch64) ARCH=arm64;; esac
wget https://github.com/buty4649/netnsplan/releases/download/v${VERSION}/netnsplan_${VERSION}_linux_${ARCH}.deb
sudo apt install ./netnsplan_${VERSION}_linux_${ARCH}.deb

rpm package

VERSION=$(wget -q -O- https://api.github.com/repos/buty4649/netnsplan/releases/latest | grep tag_name | cut -d '"' -f 4 | tr -d v)
case $(uname -m) in x86_64) ARCH=amd64;; aarch64) ARCH=arm64;; esac
yum install https://github.com/buty4649/netnsplan/releases/download/v${VERSION}/netnsplan_${VERSION}_linux_${ARCH}.rpm

Pre-built binary

VERSION=$(wget -q -O- https://api.github.com/repos/buty4649/netnsplan/releases/latest | grep tag_name | cut -d '"' -f 4 | tr -d v)
case $(uname -m) in x86_64) ARCH=amd64;; aarch64) ARCH=arm64;; esac
wget https://github.com/buty4649/netnsplan/releases/download/v${VERSION}/netnsplan_${VERSION}_linux_${ARCH}.tar.gz
tar xvf netnsplan_${VERSION}_linux_${ARCH}.tar.gz netnsplan
chmod +x netnsplan
sudo chown root: netnsplan
sudo mv netnsplan /usr/local/sbin/netnsplan

License

See LICENSE © buty4649