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Velotio - HashiCorp Consul Part 2 - MongoDB Primary and Secondary instance service registration and deregistration
#!/bin/bash
# Wait until Mongo starts
while [[ $(ps aux | grep [m]ongod | wc -l) -ne 1 ]]; do
sleep 5
done
REGISTER_MASTER=0
REGISTER_SECONDARY=0
mongo_primary=$(mongo --quiet --eval 'JSON.stringify(db.isMaster())' | jq -r .ismaster 2> /dev/null)
mongo_secondary=$(mongo --quiet --eval 'JSON.stringify(db.isMaster())' | jq -r .secondary 2> /dev/null)
if [[ $mongo_primary == false && $mongo_secondary == true ]]; then
# Deregister as Mongo Master
if [[ -a /etc/consul.d/check_scripts/mongo_primary_check.sh && -a /etc/consul.d/mongo_primary.json ]]; then
rm -f /etc/consul.d/check_scripts/mongo_primary_check.sh
rm -f /etc/consul.d/mongo_primary.json
REGISTER_MASTER=1
fi
# Register as Mongo Secondary
if [[ ! -a /etc/consul.d/check_scripts/mongo_secondary_check.sh && ! -a /etc/consul.d/mongo_secondary.json ]]; then
cp -u /opt/checks/check_scripts/mongo_secondary_check.sh /etc/consul.d/check_scripts/
cp -u /opt/checks/mongo_secondary.json /etc/consul.d/
REGISTER_SECONDARY=1
fi
else
# Register as Mongo Master
if [[ ! -a /etc/consul.d/check_scripts/mongo_primary_check.sh && ! -a /etc/consul.d/mongo_primary.json ]]; then
cp -u /opt/checks/check_scripts/mongo_primary_check.sh /etc/consul.d/check_scripts/
cp -u /opt/checks/mongo_primary.json /etc/consul.d/
REGISTER_MASTER=2
fi
# Deregister as Mongo Secondary
if [[ -a /etc/consul.d/check_scripts/mongo_secondary_check.sh && -a /etc/consul.d/mongo_secondary.json ]]; then
rm -f /etc/consul.d/check_scripts/mongo_secondary_check.sh
rm -f /etc/consul.d/mongo_secondary.json
REGISTER_SECONDARY=2
fi
fi
if [[ $REGISTER_MASTER -ne 0 && $REGISTER_SECONDARY -ne 0 ]]; then
consul reload
fi
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