Hi Akila, On Mon, Jul 18, 2016 at 4:58 PM, Akila Ravihansa Perera <raviha...@wso2.com> wrote:
> Hi Imesh, > > I've switched to command based health check for MySQL services. It will > basically run "mysqladmin -u $MYSQL_USER -p$MYSQL_PASSWORD status". This > will ensure MySQL service is ready to serve SQL requests. > Wouldn't this make it mandatory to have mysqladmin client installed in the host machine where the deployment script is run? Thanks > > Thanks. > > On Mon, Jul 18, 2016 at 9:56 AM, Imesh Gunaratne <im...@wso2.com> wrote: > >> >> >> On Thu, Jul 7, 2016 at 10:51 AM, Isuru Haththotuwa <isu...@wso2.com> >> wrote: >> >>> Hi, >>> >>> Yes, myself and Pubudu also faced this issue, lets fix it properly. >>> >>> On Wed, Jul 6, 2016 at 10:57 PM, Pubudu Gunatilaka <pubu...@wso2.com> >>> wrote: >>> >>>> Hi Akila, >>>> >>>> Yes we faced several issues related to this. Apart from what you have >>>> mentioned, we encountered mysql app name is not getting resolved. This >>>> could be the delay in updating Mesos DNS. For these issues we looking into >>>> following options. >>>> >>>> *Option 1:* >>>> Use a sleep before deploying a carbon server. Not the best option. >>>> >>>> *Option 2:* >>>> Depend on the health status results. >>>> >>>> Currently, we do use a health check for mysql apps. Using dcos CLI we >>>> can check the status of the app whether the app is alive or not. But this >>>> cannot guarantee the DBs are ready to serve requests and Mesos DNS is >>>> updated. >>>> >>> >> >>> What if we query the Mesos DNS in addition to port checking to see if >>> its updated? AFAIR what we are seeing is an java.net.UnknownHostException, >>> related to the DB hostname. >>> >> >> May be we can wait for MySQL sockets as we do for Carbon server >> transports. >> >> Thanks >> >> -- >> *Imesh Gunaratne* >> Software Architect >> WSO2 Inc: http://wso2.com >> T: +94 11 214 5345 M: +94 77 374 2057 >> W: https://medium.com/@imesh TW: @imesh >> lean. enterprise. middleware >> >> >> _______________________________________________ >> Dev mailing list >> Dev@wso2.org >> http://wso2.org/cgi-bin/mailman/listinfo/dev >> >> > > > -- > Akila Ravihansa Perera > WSO2 Inc.; http://wso2.com/ > > Blog: http://ravihansa3000.blogspot.com > -- *Imesh Gunaratne* Software Architect WSO2 Inc: http://wso2.com T: +94 11 214 5345 M: +94 77 374 2057 W: https://medium.com/@imesh TW: @imesh lean. enterprise. middleware
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