Yuval Lifshitz yuvalif

pacific

get tag range:

git tag -l "v16*"

list of related commits (needs some cleanup):

git log  --oneline v16.0.0...v16.2.15 --grep="amqp|kafka|pubsub|notif" --no-merges --extended-regexp

quincy

backtrace:

#0  0x0000561fd85bf9a4 in rgw::notify::Manager::tokens_waiter::token::~token (this=0x7f625e4e8bf8, __in_chrg=<optimized out>) at /home/yuvalif/ceph3/src/rgw/driver/rados/rgw_notify.cc:199
#1  0x0000561fd85c9d75 in rgw::notify::Manager::process_queue(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, spawn::basic_yield_context<boost::asio::executor_binder<void (*)(), boost::asio::any_io_
executor> >)::{lambda(spawn::basic_yield_context<boost::asio::executor_binder<void (*)(), boost::asio::any_io_executor> >)#7}::operator()(spawn::basic_yield_context<boost::asio::executor_binder<void (*)(), boost::asio::any_io_executor> >)
 const (__closure=__closure@entry=0x561fdf2abc18, yield=...) at /home/yuvalif/ceph3/src/rgw/driver/rados/rgw_notify.cc:457                                                                                                                    
#2  0x0000561fd85ca050 in spawn::detail::spawn_helper<boost::asio::executor_binder<void (*)(), boost::as

run vstart cluster
create the parts:

$ head -c 12M </dev/urandom > myfile1
$ head -c 12M </dev/urandom > myfile2

create the bucket:

$ aws s3api create-bucket --bucket aws-bkt5 --endpoint-url http://localhost:8000

generic setup

git config --global user.name "My Name"
git config --global user.email "my@email"
git config --global credential.helper cache
git config --global credential.helper "cache --timeout=86400"
git config --global diff.tool vimdiff
git config --global difftool.prompt false
git config --global merge.tool vimdiff
git config --global mergetool.prompt false

Tidy Up Song

Background

Static analysis is a powerful tool when searching for code issues. It does, however, have its costs. Careful tuning is required so that the developers are not overwhelmed with "false positive" detections, while on the other hand - critical errors are not missed. It also requires simple integration into the development flow, so that new issues are continuously detected and addressed.

In this project we use clang-tidy for automated static analysis

From RADOS to REDIS

Background

Bucket notifications are important building block in the object storage ecosystem. And persistent bucket notifications in particular, as they let the system overcome broker outages. However, since the persistent notifications are backed with a RADOS queue, they have a cost. Both in the extra load on the RADOS cluster, and with the inability to operate in environemnts where there is no RADOS backend. In this project, we would like to implement persistent bucket notifications in the RADOS Gateway using a Redis Queue. Combined with the "zipper" project we would be able to enjoy bucket notifications with backends like posix, dbstore, daos etc.

Note that on top of using RADOS for the notification queue, our code is depended with RADOS with its implementation of a distributed lock (to make sure that one and only one

Basic Case

start cluser with realm (single zone):

OSD=1 MON=1 MDS=0 MGR=0 ../src/test/rgw/test-rgw-multisite.sh 1

disable v2 topics:

bin/radosgw-admin -c run/c1/ceph.conf zonegroup modify --disable-feature=notification_v2
bin/radosgw-admin -c run/c1/ceph.conf period update
bin/radosgw-admin -c run/c1/ceph.conf period commit

From RADOS to REDIS

Bucket notifications are important building block for many use cases. And persistent bucket notifications in particular, as they let the system overcome broker outages. However, since the persistent notifications are backed with a RADOS queue, they have a cost. Both in the extra load on the RADOS cluster, and with the inability to operate in environemnts where there is no RADOS backend. In this project, we would like to implement persistent bucket notifications in the RADOS Gateway using a Redis Queue. Combined with the "zipper" project we would be able to enjoy bucket notifications with backends like posix, dbstore, daos etc.

Lunar Time

Lua scripts on the RADOS Gateway are powerful, so, in the meantime we only allow admins to add them to the RADOS Gatewway. Before we open this possibility to users, we want to add several protection layers to prevent from careless users to take down the system.

	# bucket notification parser according to the "pacific" formatting:
	# https://github.com/ceph/ceph/blob/pacific/src/rgw/rgw_pubsub.h
	# Note: JSON formatting does not match the one define at:
	# https://docs.aws.amazon.com/AmazonS3/latest/dev/notification-content-structure.html
	# but includes all data except: metadata, tags and opaque data

	import struct
	import sys

	def prase_string(buff, offset):

	from http.server import ThreadingHTTPServer, BaseHTTPRequestHandler
	import threading
	from multiprocessing import Process
	import random
	import json

	class HTTPPostHandler(BaseHTTPRequestHandler):
	"""HTTP POST hanler class storing the received events in its http server"""
	def do_POST(self):
	"""implementation of POST handler"""