b1873: Move files to repo

This commit is contained in:
Thomas Stokes
2024-01-29 14:27:39 +01:00
parent dd7dcba780
commit 52432eb774
3 changed files with 0 additions and 0 deletions
@@ -1,48 +0,0 @@
#!/bin/bash
# Purpose: This script identifies whether the instance the script runs on is in the same AZ as the archive.
# The user it is installed on must have aws credentials that don't need mfa. Install to /usr/share/httpd/.aws.
outputMessage() {
# parameter 1: the message to display on the site
echo "Content-type: text/html"
echo ""
echo $1
}
status() {
# parameter 1: status code and messages
echo "Status: $1"
}
# The names of the variables in the macros file.
ARCHIVE_IP_NAME="ARCHIVE_IP"
ARCHIVE_FAILOVER_IP_NAME="ARCHIVE_FAILOVER_IP"
PRODUCTION_IP_NAME="PRODUCTION_ARCHIVE"
MACROS_PATH="/etc/httpd/conf.d/000-macros.conf"
# The regex to extract the ip from a line ending in an ip.
IP_REGEX="[0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+$"
# Extracts which IP is in production.
PRODUCTION_IP=$(sed -n -e "s/^Define ${PRODUCTION_IP_NAME}\> \(.*\)$/\1/p" ${MACROS_PATH})
if [[ "$PRODUCTION_IP" == "\${${ARCHIVE_IP_NAME}}" ]]
then
# Check if main archive is in the same az by fetching the metadata
MY_AZ=$(curl -s http://169.254.169.254/latest/meta-data/placement/availability-zone)
# Extract the actual IP of the archive
ARCHIVE_IP=$(grep -m 1 "^Define ${ARCHIVE_IP_NAME}\> .*" ${MACROS_PATH} | grep -o "${IP_REGEX}")
# Fetch the instances in the region and then extract arrays, iterate through them, select those with the correct ip, and then gets the AZ.
OTHER_AZ=$(aws ec2 describe-instances | jq --arg ip "$ARCHIVE_IP" '.. | arrays | .[] | select(.PrivateIpAddress==$ip)' | jq '.. | select(.AvailabilityZone?) | .AvailabilityZone')
OTHER_AZ=$(echo $OTHER_AZ | grep -o "[a-z0-9-]*[^\"]") # Removes speech marks
if [[ "$MY_AZ" == "$OTHER_AZ" ]]
then
status "200"
outputMessage "Healthy: in the same az as the archive"
else
status "503 Not in the same az"
outputMessage "Unhealthy: Not in the same az as the archive"
fi
else
# We don't check if failover archive is in the same az
status "200"
outputMessage "failover at play: force healthy"
fi