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Document usage of load balancers

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Sergey Dudoladov 2018-03-14 13:09:16 +01:00
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@ -233,6 +233,10 @@ As a preventive measure, one can restrict the minimum and the maximum number of
If either `min_instances` or `max_instances` is set to a non-zero value, the operator may adjust the number of instances specified in the cluster manifest to match either the min or the max boundary. If either `min_instances` or `max_instances` is set to a non-zero value, the operator may adjust the number of instances specified in the cluster manifest to match either the min or the max boundary.
For instance, of a cluster manifest has 1 instance and the min_instances is set to 3, the cluster will be created with 3 instances. By default, both parameters are set to -1. For instance, of a cluster manifest has 1 instance and the min_instances is set to 3, the cluster will be created with 3 instances. By default, both parameters are set to -1.
### Load balancers
For any Postgresql/Spilo cluster an operator creates two separate k8s services: one for the master pod and one for replica pods. To expose these services to an outer network, one can attach load balancers to them by setting `enableMasterLoadBalancer` and/or `enableReplicaLoadBalancer` to `true` in the cluster manifest. In the case any of these variables is omitted from the manifest, the operator configmap's settings `enable_master_load_balancer` and `enable_replica_load_balancer` apply. Note that the operator settings affect all Postgresql services running in a namespace watched by the operator.
# Setup development environment # Setup development environment
The following steps guide you through the setup to work on the operator itself. The following steps guide you through the setup to work on the operator itself.