service_discovery.sh - terraform-mariadb-replica-homelab - A terraform homelab with mariadb and maxscale for my own understanding and learning.

service_discovery.sh (889B)

#!/bin/bash

NUMBER=$1
PORT=$2
OPERATION=$3
ROOT_SRC=$4
TMP=$(mktemp)
PORT_CHECK=$(maxctrl list servers | awk -f $ROOT_SRC/awk_scripts/port_check.awk)
DESIRED_PORT=$(echo "$PORT + 1" | bc)

if [[ $DESIRED_PORT -le $PORT_CHECK  && $OPERATION =~ "APPLY" ]]; then
    echo "Desired port of $DESIRED_PORT is unavailable, failed check against $PORT_CHECK, try setting a higher port!"
    exit 1
fi

maxctrl list servers | awk -v number=$NUMBER -v port=$PORT -f $ROOT_SRC/awk_scripts/service_discovery.awk | sed -e 'H;1h;$!d;x;s/\(.*\),/\1/' > $TMP

if ! head -n1 "$TMP" | grep -Eq '^[0-9]+$'; then
    echo "Failed to derive boundary from maxctrl output" >&2
    exit 1
fi

cat $ROOT_SRC/boundary.txt > $ROOT_SRC/boundary.txt.last
awk '(NR==1){print $0}' $TMP > $ROOT_SRC/boundary.txt
sed -i '1d' $TMP

cat $ROOT_SRC/locals.tf > $ROOT_SRC/locals.tf.last
cat $TMP > $ROOT_SRC/locals.tf

rm $TMP

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