Update Digital Ocean Floating IP and Cloudflare DNS Record

udocf.sh

#!/bin/bash

DO_TOKEN=
DO_API=https://api.digitalocean.com/v2

CF_API_KEY=
CF_AUTH_EMAIL=
CF_ROOT_DOMAIN=
CF_RECORD=
CF_API=https://api.cloudflare.com/client/v4

writeLog() {
    echo $(date -u "+%Y-%m-%dT%H:%M:%SZ") $@
}

getDOInfo() {
    local result=$(curl -sX GET -H "Content-Type: application/json" \
                        -H "Authorization: Bearer ${DO_TOKEN}" \
                        "${DO_API}/floating_ips?page=1&per_page=20")
    Old_Floating_IP=$(echo ${result} | jq -r '.floating_ips[0].ip')
    Droplet_ID=$(echo ${result} | jq -r '.floating_ips[0].droplet.id')
    Droplet_Name=$(echo ${result} | jq -r '.floating_ips[0].droplet.name')
    writeLog ${Droplet_Name}"["${Droplet_ID}"]: Floating IP:"${Old_Floating_IP}
}

updateFIP() {
    curl -sX POST -H "Content-Type: application/json" \
         -H "Authorization: Bearer ${DO_TOKEN}"\
         -d '{"type":"unassign"}' \
         "${DO_API}/floating_ips/${Old_Floating_IP}/actions" > /dev/null
    sleep 10s
    local result=$(curl -sX POST -H "Content-Type: application/json" \
                        -H "Authorization: Bearer ${DO_TOKEN}" \
                        -d '{"droplet_id": '"${Droplet_ID}"'}' \
                        "${DO_API}/floating_ips")
    curl -sX DELETE -H "Content-Type: application/json" \
         -H "Authorization: Bearer ${DO_TOKEN}" \
         "${DO_API}/floating_ips/${Old_Floating_IP}" > /dev/null
    
    New_Floating_IP=$(echo ${result} | jq -r '.floating_ip.ip')
    writeLog "New Floating IP is:" ${New_Floating_IP}
}

getZone() {
    ZONE_ID=$(curl --fail -sX GET "${CF_API}/zones/?name=${CF_ROOT_DOMAIN}" \
                   -H "X-Auth-Key:${CF_API_KEY}" \
                   -H "X-Auth-Email:${CF_AUTH_EMAIL}" \
                   -H "Content-Type: application/json" | jq -r .result[0].id)
    writeLog "DNS zone ID:" ${ZONE_ID}
}

getRecords() {
    local result=$(curl -sX GET "${CF_API}/zones/${ZONE_ID}/dns_records?type=A&name=${CF_RECORD}&page=1&per_page=20&order=type&direction=desc&match=all" \
                        -H "X-Auth-Key:${CF_API_KEY}" \
                        -H "X-Auth-Email:${CF_AUTH_EMAIL}" \
                        -H "Content-Type: application/json")
    RID=$(echo ${result} | jq -r '.result[].id')
    CF_OIP=$(echo ${result} | jq -r '.result[0].content')
    writeLog "DNS record ID:" ${RID}
}

updateRecord() {
    writeLog "Updating DNS A Record for" ${CF_RECORD} "From:" ${CF_OIP} "To:" ${New_Floating_IP}
    local result=$(curl -sX PUT "${CF_API}/zones/${ZONE_ID}/dns_records/${RID}" \
                        -H "X-Auth-Key:${CF_API_KEY}" \
                        -H "X-Auth-Email:${CF_AUTH_EMAIL}" \
                        -H "Content-Type: application/json" \
                        --data "$(printf '{"id":"%s","type":"A","name":"%s","content":"%s","ttl":1}' $RID $CF_RECORD $New_Floating_IP)")
    writeLog "success:" $(echo ${result} | jq -r '.success')
}

run(){
    getDOInfo
    updateFIP
    getZone
    getRecords
    updateRecord
}

run

Need install jq