Best way to start zookeeper server from java program -


i have 2 questions couldn't find popular/widely accepted solutions:

  1. what easiest way start zookeeper server using java program?

  2. and, possible add servers zookeeper cluster without having manually go each machine , update config files new node's id , ip:port entry?

can please help? thanks!

if want start new zookeeper server process java code, same way start other external process java, e.g. using processbuilder. there nothing special here in case of zookeeper. can check official docs on how actual command should like. gets complicated if want supervise process production use, in case better use provided on os (e.g. upstart, runit, etc...), or take @ exhibitor code examples: https://github.com/netflix/exhibitor.

if asking starting zookeeper cluster java program, complicate things further, since need supervise multiple zookeeper jvm processes on different hosts. take @ exhibitor.

if question starting zookeeper server instance inside same jvm process java code (embedded), possible. there few important details keep in mind, take @ answer: is possible start zookeeper server instance in process, unit tests?

regarding second question, real support dynamic cluster reconfiguration added recently, in 3.5.0: http://zookeeper.apache.org/doc/trunk/zookeeperreconfig.html.

prior this, can still "add servers zookeeper cluster without having manually go each machine , update config", have use configuration management tool chef, puppet or similar, , in case need restart of cluster uptake new config.


Comments

Post a Comment

Popular posts from this blog

toolbar - How to add link to user registration inside toobar in admin joomla 3 custom component -

im trying write component admin side , need add user creation. dont want duplicate existing codes add link. know how add task not simple link toolbar. thx help. if wanting button opens new user screen can try in component: $bar = jtoolbar::getinstance('toolbar'); $bar->appendbutton('link', 'users', 'new user','index.php?option=com_users&task=user.add'); you need add view.html.php file wherever you're creating toolbar. is need?
Read more

linux - disk space limitation when creating war file -

i have 1 gb disk space limitation hosting app , have used 700mb of it. however want create war file directory big (around 600mb) using command : jar -cvf root.war folderpath that's why encounter quota limitation , can't following. i'm looking way delete folder content when it's applying archive conserve disk space take note can't install zip tool in ssh shell ~ the code works on test directories, test first anyway, deletes files. it's not efficient. assumptions: 300mb free space, in destructively compress 600mb folderpath directory. none of files big -- if file in folderpath 300mb or larger, fail. notes: if ' $out ' file exists, nothing. first find pipes file list while , if ' $out ' doesn't exist in loop, create it, don't update -- if does exist, update it. each pass adds 1 more file, deletes unless file directory. after loop finishes delete empty directories too. unset u ; in=folderpath ; out=roo...
Read more