3.1 KiB
Rancher Istio
Our Istio installer wraps the istioctl binary commands in a handy helm chart, including an overlay file option to allow complex customization. It also includes:
- Kiali: Used for graphing traffic flow throughout the mesh
- Jaeger: A quick start, all-in-one installation used for tracing distributed system. This is not production qualified, please refer to jaeger documentation to determine which installation you may need instead.
For more information on how to use the feature, refer to our docs.
Warnings
- Upgrading across more than two minor versions (e.g., 1.6.x to 1.9.x) in one step is not officially tested or recommended. See Istio upgrade docs for more details.
Known Issues
Airgapped Environments
A temporary fix has been added to this chart to allow upgrades to succeed in an airgapped environment. See this issue for details. We are still advocating for an upstream fix in Istio to formally resolve this issue. The root cause is the Istio Operator upgrade command reaches out to an external repo on upgrades and the external repo is not configurable. We are tracking the fix for this issue here
Installing Istio with CNI component enabled on RHEL 8.4 SElinux enabled cluster.
To install istio with CNI enabled, e.g. when cluster has a default PSP set to "restricted", on a cluster using nodes with RHEL 8.4 SElinux enabled, run the following command on each cluster node before creating a cluster.
mkdir -p /var/run/istio-cni && semanage fcontext -a -t container_file_t /var/run/istio-cni && restorecon -v /var/run/istio-cni
See this issue for details.
Deprecations
v1alpha1 security policies
As of 1.6, Istio removed support for v1alpha1 security policies resource and replaced the API with v1beta1 authorization policies. https://istio.io/latest/docs/reference/config/security/authorization-policy/
If you are currently running rancher-istio <= 1.7.x, you need to migrate any existing v1alpha1 security policies to v1beta1 authorization policies prior to upgrading to the next minor version.
Note: If you attempt to upgrade prior to migrating your policy resources, you might see errors similar to:
Error: found 6 CRD of unsupported v1alpha1 security policy
Error: found 1 unsupported v1alpha1 security policy
Control Plane - policy pod - istio-policy - version: x.x.x does not match the target version x.x.x
Continue with the migration steps below before retrying the upgrade process.
Migrating Resources:
Migration steps can be found in this istio blog post.
You can also use these quick steps to determine if you need to follow the more extensive migration steps.