![]() Using HTTPS requires having a signed certificate. In this way, we can provideĬonfiguration for each dependency of BinderHub without needing a separateįile for each, and we can deploy them all at the same time. Has a corresponding entry in the Helm Meta Chart. Top-level sections (e.g., for jupyterhub and for prometheus) and that each section ![]() For example, look at theīinderHub Helm Chart. It is still possible to deploy each of these applications on their own withoutĪ Meta Helm Chart, this is simply a way of clustering dependencies togetherĪnd simplifying the deployment structure.Īnother benefit of Meta Charts is that you can use a single configurationįile ( config.yaml) with multiple Helm Charts. We’dĬreate a section called dependencies in mybinder/Chart.yaml and put the On Kubernetes, we can add it as a dependency in a Helm Meta Chart. Since Prometheus has a helm chart for deploying it These dependencies are specified with a Helm “Meta Chart”.įor example, let’s say that you’d like to begin using Prometheus in your Sometimes,Īpplications depend on others in order to function properly, similar to howĪ package might depend on other packages (e.g., Pandas depends on Numpy). Repository is converted into a docker image to be run for the user,īinderHub is deployed using a Kubernetes Helm Chart, which is a specificationįor instructing Kubernetes how to deploy particular applications. This is used to do the actual building of git repositories into docker To change the UI / UX or hub management aspects of , This contains the binderhub code (UI & hub management) & helm chart. Related repositories used by the service are: That is used to set up a simple nginx based HTTP redirector. You can see an example of this under mybinder/templates/redirector We sometimes want to run additional software for the mybinder deployment thatĭoes not already have a chart, or would be too cumbersome to use with a chart.įor those cases, we can create kubernetes objects directly from the mybinder To select which node a pod should run on. We use a custom label /node-purpose = core | user Users and core pods are assigned to their pools via a nodeSelector in config/prod.yaml. Nodes could get reclaimed truly automatically without any intervention, In the future, when we implement a pod packing strategy and node taints, There can be some pods such as heapster and kube-dns that may run on user nodes,Īnd need to be manually removed from the pod after cordoning before the autoscaler will allow culling. It is still not quite true that only user pods are running on the user nodes at this point. Which often wouldn’t happen without manual intervention. Since ~only user pods should be running on the user nodes,Ĭordoning that node should result in it being drained and reclaimed This strategy helps protect our key services from potential issues caused by users and helps us drain user nodes when we need to. The production cluster has two, one for “core” pods (the hub, etc.)Īnd another dedicated to “user” pods (builds and user servers). The staging cluster has one node pool, which makes things simple. Secrets between staging & prod for security boundary reasons. On staging gives us confidence it will work on prod. We want all common config in values.yaml so testing Of staging.yaml and prod.yaml super minimal - they should be as close Important: For maintainability and consistency, we try to keep the contents Secret/config/prod.yaml - Secret values specific to the productionĬonfig/prod.yaml - Non-secret values specific to the production The following files fully capture the state of the production deployment: Secret/config/staging.yaml - Secret values specific to the stagingĬonfig/staging.yaml - Non-secret values specific to the staging Mybinder/values.yaml - Common configuration values between prod & The following files fully capture the state of the deployment for staging: ![]() This contains both supportĬharts like nginx-ingress, grafana, prometheus, but also the core application chartīinderhub. The core of the meta-chart pattern is to install a bunch of dependent charts, Since it is a full helm chart, youĬan read the official helm chart structureĭocument to know more about its structure. This repository contains a ‘meta chart’ ( mybinder) that fully captures the Reference: Google SRE book section on Production Environment Repository structure # Systems used in a production deployment. This section is an overview of the repositories, projects, and
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