tecff-remove-node-from-yanic-data

#!/bin/bash
# this script removes a node (identified by the node's id or MAC) from yanic's state data
# dependencies: yanic, jq

if [ "$#" -ne 1 ]; then
	echo "missing nodeid or too many arguments"
	exit
fi

NODEID="${1//:}"

RAW="/var/lib/yanic/state/state.json"

systemctl stop yanic.service
if [ "$?" -ne "0" ]; then
	echo "problem with stopping yanic"
	exit
fi

cp $RAW ${RAW}.$(date +%Y-%m-%d:%H:%M:%S)
if [ "$?" -ne "0" ]; then
	echo "problem with backup of $RAW"
	exit
else
	echo "created backup of $RAW"
fi

jq -c --arg nodeid $NODEID '.nodes | del(.[$nodeid]) | { nodes: . }' $RAW > ${RAW}.tmp
if [ "$?" -ne "0" ]; then
	echo "problem with jq processing"
	exit
fi

mv ${RAW}.tmp $RAW
if [ "$?" -ne "0" ]; then
	echo "problem with moving modified state file"
	exit
fi

systemctl start yanic.service
if [ "$?" -ne "0" ]; then
	echo "problem with starting yanic"
	exit
fi

echo "removed $NODEID from $RAW successfully."