mirror of https://github.com/hashicorp/consul
53 lines
4.5 KiB
Markdown
53 lines
4.5 KiB
Markdown
---
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layout: docs
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page_title: Consul on Kubernetes Version Compatibility
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description: >-
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New releases require corresponding version updates to Consul on Kubernetes and its Helm chart. Review the compatibility matrix for Consul and consul-k8s and additional notes for integrating Vault and third-party platforms.
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---
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# Consul on Kubernetes Version Compatibility
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For every release of Consul on Kubernetes, a Helm chart, `consul-k8s-control-plane` binary and a `consul-k8s` CLI binary is built and distributed through a single version. When deploying via Helm, the recommended best path for upgrading Consul on Kubernetes, is to upgrade using the same `consul-k8s-control-plane` version as the Helm Chart, as the Helm Chart and Control Plane binary are tightly coupled.
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## Supported Consul and Kubernetes versions
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Consul Kubernetes versions all of its components (`consul-k8s` CLI, `consul-k8s-control-plane`, and Helm chart) with a single semantic version. When installing or upgrading to a specific versions, ensure that you are using the correct Consul version with the compatible Helm chart or `consul-k8s` CLI.
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| Consul version | Compatible `consul-k8s` versions | Compatible Kubernetes versions | Compatible OpenShift versions |
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| -------------- | -------------------------------- | -------------------------------| -------------------------------------- |
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| 1.17.x | 1.3.x | 1.25.x - 1.28.x | 4.12.x - 4.14.x (4.15.x not available) |
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| 1.16.x | 1.2.x | 1.24.x - 1.27.x | 4.11.x - 4.14.x |
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| 1.15.x | 1.1.x | 1.23.x - 1.26.x | 4.10.x - 4.13.x |
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### Version-specific upgrade requirements
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As of Consul v1.14.0, Kubernetes deployments use [Consul Dataplane](/consul/docs/connect/dataplane) instead of client agents. If you upgrade Consul from a version that uses client agents to a version that uses dataplanes, you must follow specific steps to update your Helm chart and remove client agents from the existing deployment. Refer to [Upgrading to Consul Dataplane](/consul/docs/k8s/upgrade#upgrading-to-consul-dataplane) for more information.
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The v1.0.0 release of the Consul on Kubernetes Helm chart also introduced a change to the [`externalServers[].hosts` parameter](/consul/docs/k8s/helm#v-externalservers-hosts). Previously, you were able to enter a provider lookup as a string in this field. Now, you must include `exec=` at the start of a string containing a provider lookup. Otherwise, the string is treated as a DNS name. Refer to the [`go-netaddrs`](https://github.com/hashicorp/go-netaddrs) library and command line tool for more information.
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## Supported Envoy versions
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Supported versions of Envoy and `consul-dataplane` (for Consul K8s 1.0 and above) for Consul versions are also found in [Envoy - Supported Versions](/consul/docs/connect/proxies/envoy#supported-versions). Starting with `consul-k8s` 1.0, `consul-dataplane` will include a bundled version of Envoy. The recommended best practice is to use the default version of Envoy or `consul-dataplane` that is provided in the Helm `values.yaml` file, as that is the version that has been tested with the default Consul and Consul Kubernetes binaries for a given Helm chart.
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## Vault as a Secrets Backend compatibility
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Starting with Consul K8s 0.39.0 and Consul 1.11.x, Consul Kubernetes supports the ability to utilize Vault as the secrets backend for all the secrets utilized by Consul on Kubernetes.
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| `consul-k8s` Versions | Compatible Vault Versions | Compatible `vault-k8s` Versions |
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| ------------------------ | --------------------------| ----------------------------- |
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| 0.39.0 - latest | 1.9.0 - latest | 0.14.0 - latest |
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## Platform specific compatibility notes
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### Red Hat OpenShift
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You can enable support for Red Hat OpenShift by setting `enabled: true` in the `global.openshift` stanza. Refer to the [Deploy Consul on RedHat OpenShift tutorial](https://developer.hashicorp.com/consul/tutorials/kubernetes/kubernetes-openshift-red-hat) for instructions on deploying to OpenShift.
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### VMware Tanzu Kubernetes Grid and Tanzu Kubernetes Grid Integrated Edition
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Consul Kubernetes is [certified](https://marketplace.cloud.vmware.com/services/details/hashicorp-consul-1?slug=true) for both VMware Tanzu Kubernetes Grid, and VMware Tanzu Kubernetes Integrated Edition.
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- Tanzu Kubernetes Grid is certified for version 1.3.0 and above. Only Calico is supported as the CNI Plugin.
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