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| #!/bin/bash | |
| ## Verify number of args expected: 1 | |
| if [ $# -ne 1 ]; then | |
| echo "Usage: $0 <network_data.json>" | |
| exit 1 | |
| fi | |
| NETWORK_DATA_FILE=$1 | |
| ## Function to convert netmask to CIDR notation | |
| IPprefix_by_netmask () { | |
| c=0 x=0$( printf '%o' ${1//./ } ) | |
| while [ $x -gt 0 ]; do | |
| let c+=$((x%2)) 'x>>=1' | |
| done | |
| echo $c ; | |
| } | |
| ## Verify if file Network Data exists | |
| if [ ! -f $NETWORK_DATA_FILE ]; then | |
| echo "File $1 not found!" | |
| exit 1 | |
| fi | |
| ## Verify if jq is installed | |
| if ! command -v jq &> /dev/null | |
| then | |
| echo "jq could not be found!" | |
| exit 1 | |
| fi | |
| ## Verify if file Network Data is a json file | |
| if ! jq -e . >/dev/null 2>&1 <<<$(cat $NETWORK_DATA_FILE); then | |
| echo "File $1 is not a json file!" | |
| exit 1 | |
| fi | |
| ## Verify if file Network Data is a valid json file | |
| if ! jq empty $NETWORK_DATA_FILE >/dev/null 2>&1; then | |
| echo "File $1 is not a valid json file!" | |
| exit 1 | |
| fi | |
| ## Extract network data info from json file | |
| MAC_ADDRESS=$(jq -r '.links[0].ethernet_mac_address' $NETWORK_DATA_FILE) | |
| IFNAME=$(jq -r '.networks[0].id' $NETWORK_DATA_FILE) | |
| IP_ADDRESS=$(jq -r '.networks[0].ip_address' $NETWORK_DATA_FILE) | |
| NETMASK=$(jq -r '.networks[0].netmask' $NETWORK_DATA_FILE) | |
| NETMASKCIDR=$(IPprefix_by_netmask $NETMASK) | |
| GATEWAY=$(jq -r '.networks[0].routes[0].gateway' $NETWORK_DATA_FILE) | |
| DNS=$(jq -r '.services[0].address' $NETWORK_DATA_FILE) | |
| echo "MAC_ADDRESS: $MAC_ADDRESS" | |
| echo "IFNAME: $IFNAME" | |
| echo "IP_ADDRESS: $IP_ADDRESS" | |
| echo "NETMASK: $NETMASK" | |
| echo "NETMASKCIDR: $NETMASKCIDR" | |
| echo "GATEWAY: $GATEWAY" | |
| echo "DNS: $DNS" | |
| ## main function | |
| # Configure network interface using nmcli distinguing if exists previously or not | |
| if [ $(nmcli con show --active | tail -n +2 | awk '{print $4}') == ${IFNAME} ]; then | |
| echo "Network interface ${IFNAME} already exists!" | |
| echo "Configuring network interface ${IFNAME}..." | |
| nmcli con mod ${IFNAME} ipv4.addresses ${IP_ADDRESS}/${NETMASKCIDR} ipv4.gateway ${GATEWAY} ipv4.dns ${DNS} ipv4.method manual | |
| nmcli con mod ${IFNAME} ipv4.dns ${DNS} | |
| nmcli con up ${IFNAME} | |
| else | |
| echo "Network interface ${IFNAME} does not exist!" | |
| echo "Configuring network interface ${IFNAME}..." | |
| nmcli con add type ethernet con-name ${IFNAME} ifname ${IFNAME} ip4 ${IP_ADDRESS}/${NETMASKCIDR} gw4 ${GATEWAY} ipv4.dns ${DNS} ipv4.method manual | |
| nmcli con mod ${IFNAME} ipv4.dns ${DNS} | |
| nmcli con up ${IFNAME} | |
| fi | |
| echo "Finalized network configuration!" | |
| exit 0 | |
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