b1873: Add the old healthcheck below.

2026-09-19 04:05:36 +00:00 · 2024-03-13 17:05:17 +01:00
parent 6a161d76ae
commit 1581bcaa69
1 changed files with 78 additions and 1 deletions
@@ -22,4 +22,81 @@ if [[ "$?" -eq 0 ]]; then
 else
    status "500 Reverse proxy itself is unhealthy"
    outputMessage "Reverse proxy is unhealthy"
-fi
+fi
+
+
+
+
+
+
+
+
+
+
+# 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"
+# }
+
+# convert_ip_to_num() {
+#     # $1: Ip4 address in 4 octets form, separated by 3 dots.
+#     IFS=. read -r a b c d <<< "$1"
+#     echo "$(( ( $a << 24 ) + ( $b << 16 ) +  ($c << 8 ) + ($d) ))"
+# }
+# SELF_IP=$( ec2-metadata --local-ipv4 | grep   -o "[0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+\>")
+# curl --silent --location --fail "http://${SELF_IP}/internal-server-status" >/dev/null
+# if [[ "$?" -ne 0 ]]; then
+#     status "500 Reverse proxy itself is unhealthy"
+#     outputMessage "Reverse proxy is unhealthy"
+#     exit 0
+# fi
+# # 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" ${MACROS_PATH})
+# SUBNET_MASK_SIZE_VAR_LOCATION="/var/cache/subnetMaskSize"
+# if [[ ! -e "$SUBNET_MASK_SIZE_VAR_LOCATION" ]]; then
+#     # Get subnet mask size
+#     MY_AZ=$( ec2-metadata --availability-zone | grep -o "[a-zA-Z]\+-[a-zA-Z]\+-[0-9a-z]\+\>")
+#     aws ec2 describe-subnets | jq -r '.Subnets[] | select( .AvailabilityZone =="'"$MY_AZ"'") | .CidrBlock | split("/") | .[1]' > $SUBNET_MASK_SIZE_VAR_LOCATION
+# fi
+# if [[ "$PRODUCTION_IP" == "\${${ARCHIVE_IP_NAME}}" ]]
+# then
+#     # Check if main archive is in the same az by comparing the network portion of the archive and this instance's IP, with the same bitmask.
+#     MY_IP=$( ec2-metadata --local-ipv4 | grep   -o "[0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+\>")
+#     MY_IP_VALUE="$(convert_ip_to_num "$MY_IP")"
+#     MY_AZ_MASK_SIZE=$(cat $SUBNET_MASK_SIZE_VAR_LOCATION) 
+#     # convert the value after the CIDR slash into a bitmask
+#     BITMASK_VALUE=0
+#     for i in $(seq $((31 - $MY_AZ_MASK_SIZE + 1)) 31); do
+#         BITMASK_VALUE=$(($BITMASK_VALUE | (1 << i ) ))
+#     done
+#     MY_SUBNET_VALUE=$(($BITMASK_VALUE & $MY_IP_VALUE))
+#     # Extract the actual IP of the archive
+#     ARCHIVE_IP=$(grep -m 1 "^Define ${ARCHIVE_IP_NAME}\> .*"  ${MACROS_PATH} | grep -o "${IP_REGEX}")
+#     ARCHIVE_IP_VALUE=$(convert_ip_to_num "$ARCHIVE_IP")
+#     ARCHIVE_SUBNET_VALUE=$(($BITMASK_VALUE & $ARCHIVE_IP_VALUE ))  #A Aply the mask to the archive IP value.
+#     if [[ "$ARCHIVE_SUBNET_VALUE"  -eq  "$MY_SUBNET_VALUE" ]]; 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