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--- wiki:interface_renaming_scripts [2018/06/19 10:59] – walkeradmin
+++ wiki:interface_renaming_scripts [2023/03/09 22:35] (current) – external edit 127.0.0.1
@@ Line 40: / Line 40: @@
 Now execute the file using the following syntax:
 \\
-    ./store_macaddr_mapping.sh network_mapping.csv
+    ./store_macaddr_mapping.sh --output network_mapping.csv
 \\
 \\
@@ Line 105: / Line 105: @@
 ----
+===rename_network_interfaces.sh===
+\\
+The next part is much simpler. Copy the rename_network_interfaces.sh to your server, and give it execute privileges using the following syntax:
+\\
+    chmod 777 rename_network_interfaces.sh
+\\
+Now execute the script using the following syntax:
+\\
+    ./rename_network_interfaces.sh --csv network_mapping.csv
+\\
+\\
+If successful the following output will be observed (depending on what interface scripts already existed).
+\\
+<file>
+*** Getting macaddr to register ***
+*** Using network_mapping.csv for network interface mapping ***
+        Backup of /etc/sysconfig/network-scripts/ifcfg-ens513f3 in /etc/sysconfig/network-scripts/backup/ifcfg-ens513f3
+        Backup of /etc/sysconfig/network-scripts/ifcfg-ens513f1 in /etc/sysconfig/network-scripts/backup/ifcfg-ens513f1
+        Backup of /etc/sysconfig/network-scripts/ifcfg-enp4s0f0 in /etc/sysconfig/network-scripts/backup/ifcfg-enp4s0f0
+        Backup of /etc/sysconfig/network-scripts/ifcfg-enp4s0f3 in /etc/sysconfig/network-scripts/backup/ifcfg-enp4s0f3
+        Backup of /etc/sysconfig/network-scripts/ifcfg-ens513f2 in /etc/sysconfig/network-scripts/backup/ifcfg-ens513f2
+        Backup of /etc/sysconfig/network-scripts/ifcfg-ens513f0 in /etc/sysconfig/network-scripts/backup/ifcfg-ens513f0
+        Generating file /etc/sysconfig/network-scripts/ifcfg-eth0
+        Generating file /etc/sysconfig/network-scripts/ifcfg-eth1
+        Generating file /etc/sysconfig/network-scripts/ifcfg-eth2
+        Generating file /etc/sysconfig/network-scripts/ifcfg-eth3
+        Generating file /etc/sysconfig/network-scripts/ifcfg-eth4
+        Generating file /etc/sysconfig/network-scripts/ifcfg-eth5
+</file>
+\\
+Check the /etc/sysconfig/network-scripts location to see the new files.
+\\
+Note: No configuration information is copied from the old interface scripts, so before you reboot, you need to re-add all of your IP/Netmask/Gateway/DNS information.
+\\
+\\
+Reboot the server to check the interfaces have been renamed, and the mapping is correct.
+\\
+\\
+----
+===The Scripts===
+\\
+<color #ed1c24>store_macaddr_mapping</color>
+\\
+<file>
+#!/bin/bash
+# this script is based on infos got from blog page:
+# http://ask.xmodulo.com/change-network-interface-name-centos7.html
+# exit at first error
+set -o errexit
+export IP_INTERFACES="ip addr"
+export INTERFACE_ANCHOR="state UP"
+export MACADDR_ANCHOR="link/ether"
+export OUTPUT_FILE
+function show_help() {
+cat <<- EOF
+Generate csv file with interface name; mac addr. Output file is a mandatory parameter.
+    --output                                    Output file path where mac addre mapping will be stored
+    --help|-h                                   [Optional] Display this help and exit
+EOF
+}
+while [ $# -gt 0 ] ; do
+    case $1 in
+        --output) OUTPUT_FILE="$2";shift 2;;
+        --help|-h) show_help;exit 0;;
+        *) if ! [ -z "$1" ] ; then echo "Unknown parameter $1" ; show_help ; exit 1 ; else  shift 1; fi ;;
+    esac
+done
+[ -z "$OUTPUT_FILE" ] && show_help && exit 1
+rm -f "$OUTPUT_FILE" > /dev/null 2>&1
+echo "Generating $OUTPUT_FILE"
+interface_name_list=$($IP_INTERFACES | grep "$INTERFACE_ANCHOR" | awk '{print $2}' | sed 's|:||')
+interface_name_list=($interface_name_list)
+macaddr_list=$($IP_INTERFACES | grep "$MACADDR_ANCHOR" | awk '{print $2}' | tr '[:upper:]' '[:lower:]')
+macaddr_list=($macaddr_list)
+cnt=0
+arraySize="${#macaddr_list[@]}"
+while [ "$cnt" != "$arraySize" ] ; do
+    echo "${interface_name_list[$cnt]};${macaddr_list[$cnt]}" >> "$OUTPUT_FILE"
+    cnt=$(( cnt + 1 ))
+done
+</file>
+<color #ed1c24>rename_network_interfaces.sh</color>
+\\
+<file>
+#!/bin/bash
+# this script is based on infos got from blog page:
+# http://ask.xmodulo.com/change-network-interface-name-centos7.html
+# exit at first error
+set -o errexit
+IP_INTERFACES="ip addr"
+MACADDR_ANCHOR="link/ether"
+NET_NAME_TEMPLATE="eth"
+CSV_FILE=
+NETWORK_SCRIPT_DIR="/etc/sysconfig/network-scripts"
+NETWORK_BACKUP_DIR="/etc/sysconfig/network-scripts/backup"
+NETWORK_SCRIPT_TEMPLATE='NAME="<network_name>"
+DEVICE="<network_name>"
+ONBOOT=yes
+NETBOOT=yes
+BOOTPROTO=dhcp
+TYPE=Ethernet
+# HWADDR key is mandatory to use custom interface name: do not delete it
+HWADDR=<mac_addr>
+'
+function show_help() {
+cat <<- EOF
+Update network interfaces names. A csv file with the expected mapping can be given as arg.
+    --csv                                       Csv file containing <interface name>;<mac addr> as they should be defined
+    --help|-h                                   [Optional] Display this help and exit
+EOF
+}
+while [ $# -gt 0 ] ; do
+    case $1 in
+        --csv) CSV_FILE="$2";shift 2;;
+        --help|-h) show_help;exit 0;;
+        *) if ! [ -z "$1" ] ; then echo "Unknown parameter $1" ; show_help ; exit 1 ; else  shift 1; fi ;;
+    esac
+done
+echo "*** Getting macaddr to register ***"
+macaddr_list=$($IP_INTERFACES | grep "$MACADDR_ANCHOR" | awk '{print $2}')
+if ! [ -z "$CSV_FILE" ] && [ -f "$CSV_FILE" ] ; then
+    echo "*** Using $CSV_FILE for network interface mapping ***"
+    ! [ -d "$NETWORK_BACKUP_DIR" ] && mkdir -p "$NETWORK_BACKUP_DIR"
+    for old_script_file in $(find $NETWORK_SCRIPT_DIR -maxdepth 1 -name "ifcfg-*" -a -not -name "ifcfg-lo" -a -not -name "ifcfg-*\.*"); do
+        echo -e "\tBackup of $old_script_file in $NETWORK_BACKUP_DIR/$(basename "$old_script_file")"
+        mv -f "$old_script_file" $NETWORK_BACKUP_DIR/.
+    done
+    while read interface_data
+    do
+        [ -z "$interface_data" ] && continue
+        interface_name=$(echo "$interface_data" | cut -d \; -f1)
+        mac_addr=$(echo "$interface_data" | cut -d \; -f2 | tr '[:upper:]' '[:lower:]')
+        [ -z "$interface_name" ] && continue
+        [ -z "$mac_addr" ] && continue
+        # check that given mac addr exist
+        if ! echo "$macaddr_list" | grep "$mac_addr" > /dev/null 2>&1 ; then
+            echo "Unable to find $mac_addr in available network interfaces, please review file content of $CSV_FILE"
+            exit 1
+        fi
+        echo -e "\tGenerating file $NETWORK_SCRIPT_DIR/ifcfg-$interface_name"
+        echo "$NETWORK_SCRIPT_TEMPLATE" > $NETWORK_SCRIPT_DIR/ifcfg-"$interface_name"
+        sed -i "s|<network_name>|$interface_name|g" $NETWORK_SCRIPT_DIR/ifcfg-"$interface_name"
+        sed -i "s|<mac_addr>|$mac_addr|g" $NETWORK_SCRIPT_DIR/ifcfg-"$interface_name"
+    done < "$CSV_FILE"
+else
+    echo "*** Using default naming (${NET_NAME_TEMPLATE}x) for network interface mapping ***"
+    ! [ -d "$NETWORK_BACKUP_DIR" ] && mkdir -p "$NETWORK_BACKUP_DIR"
+    cnt=0
+    for old_script_file in $(find $NETWORK_SCRIPT_DIR -maxdepth 1 -name "ifcfg-*" -a -not -name "ifcfg-lo" -a -not -name "ifcfg-*\.*"); do
+        echo -e "\tBackup of $old_script_file in $NETWORK_BACKUP_DIR/$(basename "$old_script_file")"
+        mv -f "$old_script_file" $NETWORK_BACKUP_DIR/.
+    done
+    for mac_addr in ${macaddr_list[*]}; do
+        mac_addr=$(echo "$mac_addr" | tr '[:upper:]' '[:lower:]')
+        echo -e "\tGenerating file $NETWORK_SCRIPT_DIR/ifcfg-$NET_NAME_TEMPLATE$cnt"
+        echo "$NETWORK_SCRIPT_TEMPLATE" > $NETWORK_SCRIPT_DIR/ifcfg-$NET_NAME_TEMPLATE$cnt
+        sed -i "s|<network_name>|$NET_NAME_TEMPLATE$cnt|g" $NETWORK_SCRIPT_DIR/ifcfg-$NET_NAME_TEMPLATE$cnt
+        sed -i "s|<mac_addr>|$mac_addr|g" $NETWORK_SCRIPT_DIR/ifcfg-$NET_NAME_TEMPLATE$cnt
+        cnt=$(( cnt + 1 ))
+    done
+fi
+echo "*** Please check consistency of generated files in directory $NETWORK_SCRIPT_DIR ***"
+</file>
+\\
+\\