WIP: Session deployment #22
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This PR would configure Flink to run in session mode. Essentially, it would create a single job manager for the cluster, and all
pangeo-forge-recipeswould submit their jobs to that job manager.One of the main advantages of this would be to centralize all infrastructure configuration configuration in
pangeo-forge-cloud-federation.Currently, infrastructure is spread across
pangeo-forge-cloud-federation,pangeo-forge-runnerand within the individual recipe'sconfig.py, and this makes it difficult to configure the cluster. Ideally, we could have multiple node pools of on demand and spot, instances, high-availability job managers, reactive scaling, default failure strategies, etc and set all that withinpangeo-forge-cloud-federation. Then the recipe andpangeo-forge-runnerrequire minimal configuration, like setting parallelism and the job name.