What I meant was "rebooting" the same instance [1] [1] http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-reboot.html
On Thu, Jul 24, 2014 at 11:21 AM, Sajith Kariyawasam <saj...@wso2.com> wrote: > > On Mon, Jun 30, 2014 at 5:11 PM, Dinesh Bandara <dine...@wso2.com> wrote: > >> Hi all, >> >> I have faced in to a situation that need to update existing cartridge >> instances without interrupt the process. AFAIU there are two types of >> updates that need to be applied. >> >> 1. OS level/ Security updates >> 2. Application level updates (Load balancer, PHP, MySQL) >> >> >> *Patching OS level/ Security updates* >> >> Since this is a mandatory update we have to shutdown the server and then >> need to restart it after successfully update the patch. But this will >> interrupt the whole process. >> Cartridge agent related updates can be consider as OS level update. >> >> *Solution* >> >> - Spawn a new instance and apply the updates. >> - Terminate exiting instance >> >> > Can't we think of restarting the same instance (After executing updates) > rather than terminating and spawning a new one? Because terminating and > starting a new one may incur additional cost, for eg, AFAIK Amazon EC2 > rates are based on per-hour, so if the instance terminate / re-spawn > happens in the middle of an hour, it will double the cost per instance > >> >> - >> - Repeat the above steps until spawn new instances on behalf of >> existing instances >> >> *Patching Application level updates* >> >> Status of the cartridge instance set into 'Maintenance' mode, apply >> updates and then set again as an 'Active' instance >> >> *Expose to user* >> >> Introduce new rest endpoint via SM which will provide the access to patch >> selected cluster. >> >> As the first step I would like to start with the "patching OS level >> updates". >> >> Highly appreciate your thoughts on this. >> >> Thanks, >> -- >> *Dinesh Bandara* >> Software Engineer >> WSO2 Inc.; http://wso2.com >> lean.enterprise.middleware >> >> > > > -- > *--* > *Sajith Kariyawasam* > *Mobile: +94772269575 <%2B94772269575>* > -- *--* *Sajith Kariyawasam* *Mobile: +94772269575*
