upgrade_mongo_3_6.sh

#!/usr/bin/env bash

# This script will upgrade a devstack that was previosly running Mongo DB 3.2 or 3.4 to MongoDB 3.6

RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[0;33m'
NC='\033[0m' # No Color

export MONGO_VERSION=3.4.24

echo -e "${GREEN}Sarting Mongo ${MONGO_VERSION}${NC}"
make dev.up.mongo
mongo_container="$(make -s dev.print-container.mongo)"

echo -e "${GREEN}Waiting for MongoDB...${NC}"
until docker exec "$mongo_container" bash -c 'mongo --eval \"printjson(db.serverStatus())\"' &> /dev/null
do
    if docker logs "$mongo_container" | grep -q "BadValue: Invalid value for version, found 3.6, expected '3.4' or '3.2'"; then
        echo -e "${YELLOW}Already upgraded to Mongo 3.6, exiting${NC}"
        exit
    fi
    printf "."
    sleep 1
done

echo -e "${GREEN}MongoDB ready.${NC}"
MONGO_VERSION_LIVE=$(docker exec -it "$mongo_container" mongo --quiet --eval "printjson(db.version())")
MONGO_VERSION_COMPAT=$(docker exec -it "$mongo_container" mongo --quiet \
    --eval "printjson(db.adminCommand( { getParameter: 1, featureCompatibilityVersion: 1 } )['featureCompatibilityVersion'])")
echo -e "${GREEN}Mongo Server version: ${MONGO_VERSION_LIVE}${NC}"
echo -e "${GREEN}Mongo FeatureCompatibilityVersion version: ${MONGO_VERSION_COMPAT}${NC}"

if echo "${MONGO_VERSION_COMPAT}" | grep -q "3\.2" ; then
    echo -e "${GREEN}Upgrading FeatureCompatibilityVersion to 3.4${NC}"
    docker exec -it "$mongo_container" mongo --eval "db.adminCommand( { setFeatureCompatibilityVersion: \"3.4\" } )"
else
    echo -e "${GREEN}FeatureCompatibilityVersion already set to 3.4${NC}"
fi


export MONGO_VERSION=3.6.17

echo
echo -e "${GREEN}Restarting Mongo on version ${MONGO_VERSION}${NC}"
make dev.up.mongo
mongo_container="$(make -s dev.print-container.mongo)"

echo -e "${GREEN}Waiting for MongoDB...${NC}"
until docker exec "$mongo_container" bash -c 'mongo --eval \"printjson(db.serverStatus())\"' &> /dev/null
do
    printf "."
    sleep 1
done

echo -e "${GREEN}MongoDB ready.${NC}"
MONGO_VERSION_LIVE=$(docker exec -it "$mongo_container" mongo --quiet --eval "printjson(db.version())")
MONGO_VERSION_COMPAT=$(docker exec -it "$mongo_container" mongo --quiet \
    --eval "printjson(db.adminCommand( { getParameter: 1, featureCompatibilityVersion: 1 } )['featureCompatibilityVersion'])")
echo -e "${GREEN}Mongo Server version: ${MONGO_VERSION_LIVE}${NC}"
echo -e "${GREEN}Mongo FeatureCompatibilityVersion version: ${MONGO_VERSION_COMPAT}${NC}"

if echo "${MONGO_VERSION_COMPAT}" | grep -q "3\.4" ; then
    echo -e "${GREEN}Upgrading FeatureCompatibilityVersion to 3.6${NC}"
    docker exec -it "$mongo_container" mongo --eval "db.adminCommand( { setFeatureCompatibilityVersion: \"3.6\" } )"
else
    echo -e "${GREEN}FeatureCompatibilityVersion already set to 3.6${NC}"
fi