retrieve all domain zones from IONOS using the API and convert them into bind zone files.

ionos_bind_export.sh

#!/bin/bash

# Check if API key is provided
if [ -z "$IONOS_API_KEY" ]; then
    echo "Error: IONOS_API_KEY environment variable must be set"
    exit 1
fi

# Base API URL
API_BASE="https://api.hosting.ionos.com/dns/v1"

# Function to convert records to BIND zone format
convert_zone_to_bind() {
    local zone_name="$1"
    local records="$2"
    local output_file="${zone_name}.zone"

    # Generate zone file header
    cat > "$output_file" << EOL
\$ORIGIN ${zone_name}.
\$TTL 3600
@ IN SOA ns1.${zone_name}. hostmaster.${zone_name}. (
    $(date +%Y%m%d%H)  ; Serial
    3600       ; Refresh
    1800       ; Retry
    604800     ; Expire
    86400 )    ; Minimum TTL

; Nameservers
@ IN NS ns1.${zone_name}.
@ IN NS ns2.${zone_name}.
EOL

    # Process each record
    echo "$records" | jq -c '.[]' | while read -r record; do
        local name=$(echo "$record" | jq -r '.name')
        local type=$(echo "$record" | jq -r '.type')
        local content=$(echo "$record" | jq -r '.content')
        local ttl=$(echo "$record" | jq -r '.ttl // 3600')
        local prio=$(echo "$record" | jq -r '.prio // ""')

        # Strip zone name from the record name if present
        name="${name%%.$zone_name}"

        # Convert record types to BIND format
        case "$type" in
            A)
                echo "${name:-@} IN A $content" >> "$output_file"
                ;;
            AAAA)
                echo "${name:-@} IN AAAA $content" >> "$output_file"
                ;;
            CNAME)
                echo "${name:-@} IN CNAME $content." >> "$output_file"
                ;;
            MX)
                echo "${name:-@} IN MX $prio $content." >> "$output_file"
                ;;
            NS)
                echo "${name:-@} IN NS $content." >> "$output_file"
                ;;
            TXT)
                echo "${name:-@} IN TXT $content" >> "$output_file"
                ;;
            SRV)
                # SRV record format: _service._protocol.name TTL class SRV priority weight port target
                echo "$name IN SRV $prio 1 $(echo "$content" | cut -d' ' -f2-)" >> "$output_file"
                ;;
            CAA)
                echo "${name:-@} IN CAA $content" >> "$output_file"
                ;;
        esac
    done

    echo "Generated zone file for $zone_name: $output_file"
}

# Retrieve list of zones
zones=$(curl -s -X GET "$API_BASE/zones" \
    -H "X-API-Key: $IONOS_API_KEY" \
    -H "Accept: application/json")

# Process each zone
echo "$zones" | jq -c '.[]' | while read -r zone; do
    zone_id=$(echo "$zone" | jq -r '.id')
    zone_name=$(echo "$zone" | jq -r '.name')

    # Retrieve zone details with all records
    zone_details=$(curl -s -X GET "$API_BASE/zones/$zone_id" \
        -H "X-API-Key: $IONOS_API_KEY" \
        -H "Accept: application/json")

    # Extract and convert records
    records=$(echo "$zone_details" | jq '.records')
    convert_zone_to_bind "$zone_name" "$records"
done

Thanks for the feedback. While i haven't had this issue, i've added the trailing dot to NS, CNAME and NS records in the script. SRV records are a bit more tricky so i leave that as an exercise for the reader.