Let's Encrypt on a Big-IP

My upload.sh: cat upload.sh

BIGIP_USERNAME="xxx"
BIGIP_PASSWORD="xxx"
BIGIP_DEVICE="xxx"
CURL="/usr/bin/curl"
LOGFILE=${LOGFILE:-'/home/xxx/dehydrated-bigip-deploy-traffic-certificate.log'}

DATE='date +%m/%d/%Y:%H:%M:%S'
log() {
echo `$DATE`" $*" >> $LOGFILE
}

uploadFile() {
log "uploadFile()[Upload File]: ${1}"

if [ ! -r ${1} ] ; then
return 1
fi

declare -i CHUNK_SIZE
declare -i FILESIZE
declare -i TMP_FILESIZE
declare -i BYTES_START
declare -i BYTES_END

FILENAME=`basename ${1}`
CHUNK_SIZE=$((512 * 1024))
FILESIZE=`stat -L -c%s ${1}`
TMP_FILESIZE=0
BYTES_START=0
TMP_FILE=`mktemp`

if [ ${FILESIZE} -le ${CHUNK_SIZE} ] ; then
OUT=$(/bin/bash -c "${CURL} -s --insecure -X POST --data-binary '@${1}' --user '${BIGIP_USERNAME}:${BIGIP_PASSWORD}' -H 'Content-Type: application/octet-stream' -H 'Content-Range: ${BYTES_START}-$((${FILESIZE} - 1))/${FILESIZE}' 'https://${BIGIP_DEVICE}/mgmt/shared/file-transfer/uploads/${2}'")
log "${CURL} -s --insecure -X POST --data-binary '@${1}' --user '${BIGIP_USERNAME}:${BIGIP_PASSWORD}' -H 'Content-Type: application/octet-stream' -H 'Content-Range: ${BYTES_START}-$((${FILESIZE} - 1))/${FILESIZE}' 'https://${BIGIP_DEVICE}/mgmt/shared/file-transfer/uploads/${2}'"
else
TMP_FILE=`mktemp`
while [ ${BYTES_START} -le ${FILESIZE} ] ; do
  echo -n '' > ${TMP_FILE}
  dd if="${1}" skip=${BYTES_START} bs=${CHUNK_SIZE} count=1 of="${TMP_FILE}"
  TMP_FILESIZE=`stat -L -c%s ${TMP_FILE}`
  if [ $((${BYTES_START} + ${CHUNK_SIZE})) -gt ${TMP_FILESIZE} ] ; then
    BYTES_END=${FILESIZE}
  else
    BYTES_END=$((${BYTES_START} + ${TMP_FILESIZE}))
  fi
  OUT=$(/bin/bash -c "${CURL} -s --insecure -X POST --data-binary '@${TMP_FILE}' --user '${BIGIP_USERNAME}:${BIGIP_PASSWORD}' -H 'Content-Type: application/octet-stream' -H 'Content-Range: ${BYTES_START}-$((${BYTES_END} - 1))/${FILESIZE}' 'https://${BIGIP_DEVICE}/mgmt/shared/file-transfer/uploads/${2}'")
  log "${CURL} -s --insecure -X POST --data-binary '@${TMP_FILE}' --user '${BIGIP_USERNAME}:${BIGIP_PASSWORD}' -H 'Content-Type: application/octet-stream' -H 'Content-Range: ${BYTES_START}-$((${BYTES_END} - 1))/${FILESIZE}' 'https://${BIGIP_DEVICE}/mgmt/shared/file-transfer/uploads/${2}'"
  BYTES_START=${BYTES_END}
done
fi

if [ "${TMP_FILE}x" != "x" ] && test -e "${TMP_FILE}" ; then
rm -f "${TMP_FILE}"
fi

  Overwrite the old records list with the new one.
 OUT=$(restCall "POST" "/mgmt/shared/file-transfer/uploads/~${BIGIP_PARTITION}~${1}" "{ \"records\": ${TT} }")
log "uploadFile()[Upload results]: `echo $OUT | python -mjson.tool`"

return 0
}

OUT=$(uploadFile "file.txt" "file.txt")
echo $OUT

So in essence it is just the upload function called with some static parameters.