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https://codeberg.org/scottslowe/learning-tools.git
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6be1772331
Add Bash shell script to help with namespace setup. Add sections to Ansible playbook for cloning Git repo and inserting Bash shell script for namespace setup. Update README.md with final instructions.
46 lines
1.4 KiB
Bash
46 lines
1.4 KiB
Bash
#!/bin/bash
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# Add new network namespace if it doesn't already exist
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# Delete existing network namespace named "testns"
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if [ -e "/var/run/netns/testns" ]; then
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sudo ip netns del testns
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echo "Existing network namespace removed"
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fi
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# Create new "testns" namespace
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sudo ip netns add testns
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echo "New network namespace named \"testns\" created"
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# Create new veth pair, deleting existing veth pair if necessary
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# If 'veth0' already exists, then delete it
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if [ -e "/sysclass/net/veth0" ]; then
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sudo ip link del veth0 type veth
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echo "Existing veth pair removed"
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fi
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# Create new veth pair
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sudo ip link add veth0 type veth peer name veth1
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echo "New veth pair created"
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# Get last octet of IP address of VM for use later
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IP=$(grep 'address' /etc/network/interfaces | tr "." " " | awk '{print $5'})
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#echo $IP
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NS_IP="10.1.1.$IP/24"
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#echo $NS_IP
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# Set up network namespace
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# Move veth1 to testns if it still exists in primary namespace
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if [ -e /sys/class/net/veth1 ]; then
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sudo ip link set veth1 netns testns
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echo "Moved veth1 to new network namespace"
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fi
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# Add IP address to veth1 if IP address isn't already there
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if [ `sudo ip netns exec testns ip addr list | grep 'inet ' | wc -l` -eq 0 ]; then
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sudo ip netns exec testns ip addr add $NS_IP dev veth1
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echo "IP address $NS_IP assigned to veth1 in new network namespace"
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fi
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# Set the veth pair to up
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sudo ip netns exec testns ip link set veth1 up
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sudo ip link set veth0 up
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