linux:netns
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| Next revision | Previous revision | ||
| linux:netns [2025/08/15 16:25] – created jonathan | linux:netns [2025/08/15 16:55] (current) – jonathan | ||
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| ===== Linux - NETNS ===== | ===== Linux - NETNS ===== | ||
| - | + | This Bash script creates three separate Linux network namespaces (instance1, instance2, and instance3), assigns a specific physical interface to each, configures their IPv4/IPv6 addresses and default routes, and sets custom DNS resolvers for each namespace. | |
| - | <code - instances-netns.sh> | + | <code - / |
| #!/bin/bash | #!/bin/bash | ||
| ip netns add instance1 | ip netns add instance1 | ||
| Line 22: | Line 22: | ||
| mkdir -p / | mkdir -p / | ||
| echo -e " | echo -e " | ||
| + | |||
| ip netns add instance3 | ip netns add instance3 | ||
| ip link set enp7s0 netns instance3 | ip link set enp7s0 netns instance3 | ||
| ip netns exec instance3 ip link set enp7s0 up | ip netns exec instance3 ip link set enp7s0 up | ||
| - | ip netns exec instance2 | + | ip netns exec instance3 |
| - | ip netns exec instance2 | + | ip netns exec instance3 |
| - | ip netns exec instance2 | + | ip netns exec instance3 |
| - | ip netns exec instance2 | + | ip netns exec instance3 |
| mkdir -p / | mkdir -p / | ||
| echo -e " | echo -e " | ||
| </ | </ | ||
| + | \\ | ||
| + | This Bash script displays the network interface details, IPv4/IPv6 addresses, and routing tables for three network namespaces (instance1, instance2, and instance3) in a formatted, sectioned output. | ||
| <code - show-netns-settings.sh> | <code - show-netns-settings.sh> | ||
| #!/bin/bash | #!/bin/bash | ||
| Line 75: | Line 77: | ||
| echo "################################################" | echo "################################################" | ||
| </ | </ | ||
| + | \\ | ||
| + | This script opens firefox-esr in three different network namespaces (instance1, instance2, instance3), each using its own browser profile and with proxy settings disabled. | ||
| <code - netns-firefox.sh> | <code - netns-firefox.sh> | ||
| #####Note that it isn't compatible with Firefox snap version. The firefox-esr must be installed.##### | #####Note that it isn't compatible with Firefox snap version. The firefox-esr must be installed.##### | ||
| Line 90: | Line 93: | ||
| env DISPLAY=$DISPLAY XAUTHORITY=$XAUTHORITY firefox-esr --new-instance --profile $HOME/ | env DISPLAY=$DISPLAY XAUTHORITY=$XAUTHORITY firefox-esr --new-instance --profile $HOME/ | ||
| </ | </ | ||
| + | \\ | ||
| + | This script runs speedtest-cli inside three network namespaces (instance1, instance2, instance3) with proxy variables cleared, allowing separate network speed tests for each namespace. | ||
| <code - netns-speedtest.sh> | <code - netns-speedtest.sh> | ||
| #!/bin/bash | #!/bin/bash | ||
| Line 101: | Line 105: | ||
| sudo / | sudo / | ||
| sudo -u $USER \ speedtest-cli | sudo -u $USER \ speedtest-cli | ||
| + | </ | ||
| + | \\ | ||
| + | This systemd unit file defines a one-shot service that runs the / | ||
| + | <code - / | ||
| + | [Unit] | ||
| + | Description=Run CPE Netns Script at Boot | ||
| + | After=network.target | ||
| + | |||
| + | [Service] | ||
| + | Type=oneshot | ||
| + | ExecStart=/ | ||
| + | RemainAfterExit=yes | ||
| + | |||
| + | [Install] | ||
| + | WantedBy=multi-user.target | ||
| + | </ | ||
| + | \\ | ||
| + | These commands reload systemd to recognize new or changed units, enable the instances-netns.service to start at boot, and start the service immediately. | ||
| + | <code - Activate the new service> | ||
| + | sudo systemctl daemon-reload | ||
| + | sudo systemctl enable instances-netns.service | ||
| + | sudo systemctl start instances-netns.service | ||
| </ | </ | ||
linux/netns.1755275141.txt.gz · Last modified: by jonathan