test-lua-package-reload.md

• start a vstart cluster

MON=1 OSD=1 MDS=0 MGR=0 RGW=1 ../src/vstart.sh -n -d

• create a lua file that implemets access log and depends on cjson and socket packages

  if Request.RGWOp == "get_obj" then
    local json = require("cjson")
    local socket = require("socket")
    local unix = require("socket.unix")
    local s = assert(unix())
    E = {}
    msg = {bucket = (Request.Bucket or (Request.CopyFrom or E).Bucket).Name,
      time = Request.Time,
      operation = Request.RGWOp,
      http_status = Request.Response.HTTPStatusCode,
      error_code = Request.Response.HTTPStatus,
      object_size = Request.Object.Size,
      trans_id = Request.TransactionId}
    assert(s:connect("/tmp/socket"))
    assert(s:send(json.encode(msg).."\n"))
    assert(s:close())
  end

• upload the file to the rgw and add required packages to allowlist

bin/radosgw-admin script put --infile test.lua --context postrequest
bin/radosgw-admin script-package add --package=lua-cjson --allow-compilation
bin/radosgw-admin script-package add --package=luasocket --allow-compilation

• start a unix socket server to receive the access log messages

rm -f /tmp/socket
nc -vklU /tmp/socket

• create a bucket, upload a file and then access it

aws --endpoint-url http://localhost:8000 s3 mb s3://fish
aws --endpoint-url http://localhost:8000 s3 cp myfile s3://fish/
aws --endpoint-url http://localhost:8000 s3 cp s3://fish/myfile .

• no messages should be seen by the unix socket server, and rgw debug log should show lua error indicating that package is missing
• call "reload"

bin/radosgw-admin script-package reload

• access the file again

aws --endpoint-url http://localhost:8000 s3 cp s3://fish/myfile .

• now a JSON log message should be seen in the unix socket server