-- Filip On Fri, Jan 6, 2017 at 5:35 PM, 'Tim Hockin' via Kubernetes user discussion and Q&A <kubernetes-users@googlegroups.com> wrote:
> Ahh, you want to start with a clone of the data, not an empty volume. > Why not use something like git-sync to pull the data down from some > canonical source? > > On Thu, Jan 5, 2017 at 11:33 PM, Montassar Dridi > <montassar0dr...@gmail.com> wrote: > > each new pod gets it's own persistent volume copy/clone of the first > > persistent volume > > > > On Friday, January 6, 2017 at 1:09:56 AM UTC-5, Tim Hockin wrote: > >> > >> On Thu, Jan 5, 2017 at 9:52 PM, Montassar Dridi > >> <montass...@gmail.com> wrote: > >> > > >> > > >> > On Thursday, January 5, 2017 at 11:17:26 PM UTC-5, Tim Hockin wrote: > >> >> > >> >> On Thu, Jan 5, 2017 at 5:24 PM, Montassar Dridi > >> >> <montass...@gmail.com> wrote: > >> >> > Hi Tim, > >> >> > > >> >> > I'm trying to do something like this example > >> >> > > >> >> > > >> >> > https://github.com/kubernetes/kubernetes/tree/master/ > examples/mysql-wordpress-pd > >> >> > I have a java web application and MYSQL database running within > >> >> > Kubernetes > >> >> > connected to each other, used "kubernetes Deployment" as the > example > >> >> > above. > >> >> > >> >> "connected" via a Service or in the same Pod? > >> > > >> > > >> > -> yes via service and each one have it's own "Deployment" so separate > >> > pods > >> > > >> >> > >> >> > >> >> > When I try to increase the number of the web replicas, they all try > >> >> > to > >> >> > connect to that persistent disk that was created from the > beginning, > >> >> > and > >> >> > they get stuck not be able to create the new web pods. > >> >> > >> >> PDs are only able to be mounted read-write by one pod at a time. > >> >> That's just a limitation of the block device+filesystem interface. > >> > > >> > > >> > -> exactly, that's why I need to automatically generate a new PD > unique > >> > for > >> > every newly created pod. > >> > > >> >> > >> >> > >> >> > So what I want is when I ask for new pods, a unique new persistent > >> >> > disks/volumes should be created and associated for each one of > them, > >> >> > like > >> >> > how Statefulsets/PetSets do it. > >> >> > >> >> Why do you want a new PD for each replica? If it is new, then the > >> >> "persistent" nature of it is not valuable, and you can just use plain > >> >> inline volumes instead of a claim. But if it is going to be released > >> >> with the pod, why use a PD at all? why not just use emptyDir? > >> > > >> > > >> > ->The reason I'm creating new pods, is trying to anticipate what > happens > >> > if > >> > I turn the Horizontal Pod auto-scaling on. Also I want all the pods to > >> > be > >> > consistent with each other, if I modify one, I want them all to get > the > >> > same > >> > changes. > >> > >> But why do you need PERSISTENT volumes, if you say you want "unique new" > >> disks? > >> > >> >> > I appreciate your help and thanks for responding. > >> >> > > >> >> > On Thursday, January 5, 2017 at 7:41:22 PM UTC-5, Tim Hockin wrote: > >> >> >> > >> >> >> Can you explain what you're trying to achieve? > >> >> >> > >> >> >> Fundamentally, persistent volumes and replication are at odds with > >> >> >> each other. Replication implies fungibility and "all replicas are > >> >> >> identical". Persistent volumes implies "the data matters and is > >> >> >> potentially different". > >> >> >> > >> >> >> Now, I can think of a couple cases where this isn't quite so > >> >> >> black-and-white, and we've discussed if/how to implement for those > >> >> >> cases. But I am not going to tell you what they are until you > >> >> >> explain > >> >> >> to me what you're trying to do, lest I muddy the water :) > >> >> >> > >> >> >> Tim > >> >> >> > >> >> >> > >> >> >> On Thu, Jan 5, 2017 at 4:12 PM, Montassar Dridi > >> >> >> <montass...@gmail.com> wrote: > >> >> >> > thanks for responding > >> >> >> > I tried it, still doesn't automatically generate new volumes for > >> >> >> > the > >> >> >> > new > >> >> >> > pods. PetSets/StatefulSets using "volumeClaimTemplates" for > >> >> >> > that. > >> >> >> > Is > >> >> >> > there > >> >> >> > a tool like that for Deployment? > >> >> >> > > >> >> >> > On Thursday, January 5, 2017 at 6:19:43 PM UTC-5, Vishnu Kannan > >> >> >> > wrote: > >> >> >> >> > >> >> >> >> Check out dynamic volumes provisioning here. > >> >> >> >> > >> >> >> >> On Thu, Jan 5, 2017 at 3:07 PM, Montassar Dridi > >> >> >> >> <montass...@gmail.com> > >> >> >> >> wrote: > >> >> >> >>> > >> >> >> >>> Hello!! > >> >> >> >>> > >> >> >> >>> I'm using Kubernetes deployment with persistent volume to run > my > >> >> >> >>> application, but when I try to add more replicas or autoscale, > >> >> >> >>> all > >> >> >> >>> the > >> >> >> >>> new > >> >> >> >>> pods try to connect to the same volume. > >> >> >> >>> How can I simultaneously auto create new volumes for each new > >> >> >> >>> pod., > >> >> >> >>> like > >> >> >> >>> statefulsets(petsets) are able to do it. > >> >> >> >>> > >> >> >> >>> -- > >> >> >> >>> You received this message because you are subscribed to the > >> >> >> >>> Google > >> >> >> >>> Groups > >> >> >> >>> "Kubernetes user discussion and Q&A" group. > >> >> >> >>> To unsubscribe from this group and stop receiving emails from > >> >> >> >>> it, > >> >> >> >>> send > >> >> >> >>> an > >> >> >> >>> email to kubernetes-use...@googlegroups.com. > >> >> >> >>> To post to this group, send email to > >> >> >> >>> kubernet...@googlegroups.com. > >> >> >> >>> Visit this group at > >> >> >> >>> https://groups.google.com/group/kubernetes-users. > >> >> >> >>> > >> >> >> >>> For more options, visit https://groups.google.com/d/optout. > >> >> >> >> > >> >> >> >> > >> >> >> > -- > >> >> >> > You received this message because you are subscribed to the > Google > >> >> >> > Groups > >> >> >> > "Kubernetes user discussion and Q&A" group. > >> >> >> > To unsubscribe from this group and stop receiving emails from > it, > >> >> >> > send > >> >> >> > an > >> >> >> > email to kubernetes-use...@googlegroups.com. > >> >> >> > To post to this group, send email to > kubernet...@googlegroups.com. > >> >> >> > Visit this group at > >> >> >> > https://groups.google.com/group/kubernetes-users. > >> >> >> > For more options, visit https://groups.google.com/d/optout. > >> >> > > >> >> > -- > >> >> > You received this message because you are subscribed to the Google > >> >> > Groups > >> >> > "Kubernetes user discussion and Q&A" group. > >> >> > To unsubscribe from this group and stop receiving emails from it, > >> >> > send > >> >> > an > >> >> > email to kubernetes-use...@googlegroups.com. > >> >> > To post to this group, send email to kubernet...@googlegroups.com. > >> >> > Visit this group at https://groups.google.com/ > group/kubernetes-users. > >> >> > For more options, visit https://groups.google.com/d/optout. > >> > > >> > -- > >> > You received this message because you are subscribed to the Google > >> > Groups > >> > "Kubernetes user discussion and Q&A" group. > >> > To unsubscribe from this group and stop receiving emails from it, send > >> > an > >> > email to kubernetes-use...@googlegroups.com. > >> > To post to this group, send email to kubernet...@googlegroups.com. > >> > Visit this group at https://groups.google.com/group/kubernetes-users. > >> > For more options, visit https://groups.google.com/d/optout. > > > > -- > > You received this message because you are subscribed to the Google Groups > > "Kubernetes user discussion and Q&A" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to kubernetes-users+unsubscr...@googlegroups.com. > > To post to this group, send email to kubernetes-users@googlegroups.com. > > Visit this group at https://groups.google.com/group/kubernetes-users. > > For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "Kubernetes user discussion and Q&A" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to kubernetes-users+unsubscr...@googlegroups.com. > To post to this group, send email to kubernetes-users@googlegroups.com. > Visit this group at https://groups.google.com/group/kubernetes-users. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Kubernetes user discussion and Q&A" group. 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