I have a spring boot service that configures ignite at startup and executes Ignition.start(). There are 2 more services also on spring boot that need to be placed in one Ignite cluster. How can I do this?
You are running Apache Ignite in embedded mode using maven dependency. For sharing the same Ignite instance across services, you need to create an Ignite cluster in distributed mode and then connect to the same Cluster from all the services using Thin/Thick client as per your need.
For e.g Creating Ignite cluster using Docker refer to the link: https://ignite.apache.org/docs/latest/installation/installing-using-docker
There are other options available to create Ignite cluster.
Once the Cluster is created then you can use a Thick/Thin client to connect to the same cluster.
Please refer :
https://www.gridgain.com/docs/latest/getting-started/concepts
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I have a service, that runs on run on kubernetes, uses Apache Ignite to store some data for processing, runs in replication mode with native persistence enabled. How to rightly mount the volume so the data is persisted the disk? Please note, this question is not related to mounting volumes in Kubernetes, rather the configuration/method to enable persistence in service running with embedded Ignite server in Kubernetes.
Note: The application may run multiple replicas.
Edit: As volumes (pvc) cannot be shared by multiple pods, only pod runs successfully, and other pods are in pending state.
The stateless means the system does not have dependency during its start or execution, but only be as stateless as possible. So, as the need itself is persistence, the Ignite has to be deployed as stateful using the StatefulSet. The StatefulSet will automatically provision separate volumes & mount it to every pod.
Checkout out Ignite guides for mounting K8 on AWS, GKE, and Azure
On the Ignite website, I see that in Amazon EKS, Microsoft Azure Kubernetes Service Deployment, and Google Kubernetes Engine Deployment, deploy on each of the three platforms ignite.If I am on my own deployed K8S, can I deploy?Is it the same as deploying the Ignite on three platforms?
Sure, just skip the initial EKS/Azure initialization steps since you don't need them and move directly to the K8s configuration.
Alternatively, you might try Apache Ignite and GridGain k8s operator that simplifies the deployment.
Does the Apache Ignite operate on a spring framework basis?
Can I register a spring controller in classpath at server remote node and use it?(using component , like #Controller)
Apache Ignite is integrated with Spring but isn't based on it.
You can register spring beans when starting remote node (using normal spring approach) and then use them from e.g. compute or distributed services.
I'm not sure if you can register beans remotely in runtime, but I don't see why not.
Ignite has two modes, one is Server mode, and the other is client mode.I am reading https://apacheignite.readme.io/docs/clients-vs-servers, but didn't get a good understanding of these two modes.
In my opinion, there are two use cases:
If the Ignite is used as an embedded server in a java application, they the Ignite should be in server mode, that is, Ignite should be started with
Ignite ignite = Ignition.start(configFile)
If I have setup an Ignite cluster that are running as standalone processes. Then in my java code, I should start Ignite in client mode, so that the client mode Ignite can connect to the Ignite cluster, and CRUD the cache data that resides in the ignite cluster?
Ignition.setClientMode(true);
Ignite ignite = Ignition.start(configFile)
Yeah, this is correct understanding.
Ignite client mode intended as lightweight mode (which do not store data and do not execute compute tasks). Client node should communicate with a cluster and should not utilize self resources.
Client does not even started without server node presented in topology.
In order to further add to #Makros answer, Ignite Client stores data if near cache is enabled. This is done in order to increase the performance of cache retrievals.
Yeah, you are right in ignite client has IgniteConfiguration.setClientMode(true); and for server IgniteConfiguration.setClientMode(false);, which is default value. if set IgniteConfiguration.setClientMode(false); in you code or forget to set setClientMode(); it will work as server.
We are using apache ignite as a IMDG in our micro services environment.
For scalability and load balancing we are considering to use a service registry like eureka or consul which is supported by spring cloud for the deployed micro services.
There is a concept of service grid providing support for node singleton and cluster singleton in apache ignite.
I also see WCF,weblogic and JBoss to having the same sort of features.
I am trying to understand what these service grids are and if i can use them to achieve the same benefits as the eureka service registry provided by netflix and supported by spring cloud.
Can someone guide if i can achieve the same using service grid in apache ignite.
No, you cannot use Apache Ignite Service Grid for the same purposes as Eureka. Eureka is used for load balancing and service discovery over WAN. Using Ignite clusters spanning over multiple AWS zones and remote client machines is not the most efficient way of using it.
More information on Ignite Service Grid can be found here - http://apacheignite.gridgain.org/docs/service-grid
Thanks!
UPD (for the 1st comment):
You cannot (in most cases) span and effectively use Ignite over WAN networks with high latencies and lower throughput characteristics.
As far as local clusters in non-cloud environments - go ahead! This is the best environment for systems of such kind.