65 lines
2.5 KiB
YAML
65 lines
2.5 KiB
YAML
- op: add
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path: "/spec/template/spec/preKubeadmCommands/-"
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value:
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systemctl enable --now vm-infra-bridge.service
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- op: add
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path: "/spec/template/spec/files/-"
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value:
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path: /etc/systemd/system/vm-infra-bridge.service
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permissions: "0644"
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owner: root:root
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content: |
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[Unit]
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Description=Service to setup vm-infra-bridge and NAT using iptables
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Wants=network-online.target
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After=network.target network-online.target
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[Service]
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User=root
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WorkingDirectory=/usr/bin
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ExecStart=/usr/bin/vm-infra-bridge.sh
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[Install]
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WantedBy=multi-user.target
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- op: add
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path: "/spec/template/spec/files/-"
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value:
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path: /usr/bin/vm-infra-bridge.sh
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permissions: "0744"
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owner: root:root
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content: |
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#!/bin/bash
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export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin
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export DEBCONF_NONINTERACTIVE_SEEN=true
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export DEBIAN_FRONTEND=noninteractive
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# activate ip_forwarding
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echo 1 | sudo tee /proc/sys/net/ipv4/ip_forward
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# retrieve the last octet as the vm-bridge ip addresses will follow
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# the pattern of <first three octet from the VM_NETWORK>:<last octet from the oam
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# IP's last octet>
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octet=$(ip addr show dev REPLACEMENT_MGMT_INTF | grep 'inet ' | awk 'NR==1{print $2}' | awk -F "/" '{print $1}' | awk -F "." '{print $4}')
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# Given the CIDR for oam network is /26 (with 62 possible hosts), the below modulo 44 division
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# is to ensure that the octet is within the range of the OAM last octet.
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# TODO : Need to make the modulo value configurable for future release.
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mgmtoctet=$(($octet % 44))
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vm_infra_ip_address=$(awk -F"." '{print $1"."$2"."$3"."}'<<<"REPLACEMENT_VM_NETWORK")${mgmtoctet}
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echo "Going to use ${vm_infra_ip_address}"
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# convert the subnet information to CIDR format
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vm_infra_ip_cidr=$(awk -F. '{
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split($0, octets)
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for (i in octets) {
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mask += 8 - log(2**8 - octets[i])/log(2);
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}
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print "/" mask
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}' <<< "REPLACEMENT_VMNETWORK_SUBNET_MASK")
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# add bridge if it doesn't exist
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if ! brctl show | grep -q vm-infra-bridge; then
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brctl addbr vm-infra-bridge
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ip link set vm-infra-bridge up
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ip addr add ${vm_infra_ip_address}${vm_infra_ip_cidr} dev vm-infra-bridge
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brctl addif vm-infra-bridge REPLACEMENT_VM_INFRA_INTF
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fi;
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exit 0
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