Helm

Use Helm to deploy an ambient service mesh to your cluster.

For more information about the components that are installed in these steps, see the ambient components overview.

Considerations

Before you install an ambient mesh, review the following considerations and requirements.

Version requirements

Review the following known Istio version requirements and restrictions.

If you use Istio versions 1.27.7, 1.28.4, 1.29.0 or later, and you install the Solo UI into a namespace other than gloo-mesh, you must allow that namespace by listing it in the DEBUG_ENDPOINT_AUTH_ALLOWED_NAMESPACES environment variable of your istiod installation. For more information, see the release notes.

Single-cluster and multicluster meshes

This guide shows you how to install an ambient mesh in one cluster.

If you later decide to upgrade to a multicluster mesh with an Enterprise level license, you can link your existing ambient meshes across clusters.
Alternatively, if you prefer to start with a multicluster mesh immediately, check out Install and connect new ambient meshes in the multicluster guide instead.

Platform requirements

The steps in the following sections have options for deploying an ambient mesh to either Kubernetes or OpenShift clusters.

If you use OpenShift clusters, complete the following steps before you begin:

Set routingViaHost: true in the Cluster Network Operator to enable OVN-Kubernetes local gateway mode. For more information, see the Platform-specific prerequisites in the ambient mesh docs.

The commands for OpenShift in the following steps contain these required settings:

Your Helm settings must include global.platform=openshift for Istio 1.24 and later. If you instead install Istio 1.23 or earlier, you must use profile=openshift instead of the global.platform setting.
Install the istio-cni and ztunnel Helm releases in the kube-system namespace, instead of the istio-system namespace.

Revision and canary upgrade limitations

The upgrade guides in this documentation show you how to perform in-place upgrades for your Istio components, which is the recommended upgrade strategy.

Step 1: Set up tools

If you do not already have a license, decide the level of licensed features that you want, and contact an account representative to obtain the license.
Choose the version of Istio that you want to install or upgrade to by reviewing the supported versions table.
Decide on the specific tag of Solo distribution of Istio image, such as -solo, -solo-fips, -solo-distroless, or -solo-fips-distroless, that you want for your environment.
Save the details for the version of the Solo distribution of Istio that you want to install.
1. Save the Solo distribution of Istio patch version and tag.
  export ISTIO_VERSION=1.30.1 # Change the tags as needed export ISTIO_IMAGE=${ISTIO_VERSION}-solo
2. Save the image and Helm repository information for the Solo distribution of Istio.
  - Istio version 1.29 and later:
    export REPO=us-docker.pkg.dev/soloio-img/istio export HELM_REPO=us-docker.pkg.dev/soloio-img/istio-helm
  - Istio version 1.28 and earlier: Save the repo key for the minor version of the Solo distribution of Istio that you want to install. This is the 12-character hash at the end of the repo URL us-docker.pkg.dev/gloo-mesh/istio-<repo-key>, which you can find in the Istio images built by Solo.io support article.
    # 12-character hash at the end of the minor version repo URL export REPO_KEY=<repo_key> export REPO=us-docker.pkg.dev/gloo-mesh/istio-${REPO_KEY} export HELM_REPO=us-docker.pkg.dev/gloo-mesh/istio-helm-${REPO_KEY}
3. Set your license key as an environment variable. If you prefer to specify license keys in a secret instead, see Licensing.
  export SOLO_ISTIO_LICENSE_KEY=<license_key>

Install or upgrade istioctl with the same version of Istio that you saved.

curl -L https://istio.io/downloadIstio | ISTIO_VERSION=${ISTIO_VERSION} sh -
cd istio-${ISTIO_VERSION}
export PATH=$PWD/bin:$PATH

Check the platform-specific prerequisites for ambient to determine whether you must make any changes to your environment before you install an ambient mesh.

Step 2: Install CRDs

Apply the CRDs for the Kubernetes Gateway API to your cluster, which are required to create components such as waypoint proxies for L7 traffic policies, gateways with the Gateway resource, and more.
```
kubectl apply -f https://github.com/kubernetes-sigs/gateway-api/releases/download/v1.5.0/standard-install.yaml
```

Install the base chart, which contains the CRDs and cluster roles required to set up Istio.

helm upgrade --install istio-base oci://${HELM_REPO}/base \
--namespace istio-system \
--create-namespace \
--version ${ISTIO_IMAGE} \
-f - <<EOF
defaultRevision: ""
profile: ambient
EOF

helm upgrade --install istio-base oci://${HELM_REPO}/base \
--namespace istio-system \
--create-namespace \
--version ${ISTIO_IMAGE} \
-f - <<EOF
defaultRevision: ""
profile: ambient
global:
  platform: openshift
EOF

You can optionally verify that the CRDs are successfully installed by running the following command.

kubectl get crds -l app.kubernetes.io/instance=istio-base

Example output:

NAME                                       CREATED AT
authorizationpolicies.security.istio.io    2025-12-16T22:56:00Z
destinationrules.networking.istio.io       2025-12-16T22:56:00Z
envoyfilters.networking.istio.io           2025-12-16T22:56:00Z
gateways.networking.istio.io               2025-12-16T22:56:00Z
peerauthentications.security.istio.io      2025-12-16T22:56:00Z
proxyconfigs.networking.istio.io           2025-12-16T22:56:00Z
requestauthentications.security.istio.io   2025-12-16T22:56:00Z
segments.admin.solo.io                     2025-12-16T22:56:00Z
serviceentries.networking.istio.io         2025-12-16T22:56:00Z
sidecars.networking.istio.io               2025-12-16T22:56:00Z
telemetries.telemetry.istio.io             2025-12-16T22:56:00Z
virtualservices.networking.istio.io        2025-12-16T22:56:00Z
wasmplugins.extensions.istio.io            2025-12-16T22:56:00Z
workloadentries.networking.istio.io        2025-12-16T22:56:00Z
workloadgroups.networking.istio.io         2025-12-16T22:56:00Z

Step 3: Deploy the ambient control plane

Create the istiod control plane in your cluster.

helm upgrade --install istiod oci://${HELM_REPO}/istiod \
--namespace istio-system \
--version ${ISTIO_IMAGE} \
-f - <<EOF
global:
  hub: ${REPO}
  proxy:
    clusterDomain: cluster.local
  tag: ${ISTIO_IMAGE}
meshConfig:
  accessLogFile: /dev/stdout
  defaultConfig:
    proxyMetadata:
      ISTIO_META_DNS_CAPTURE: "true"
env:
  PILOT_ENABLE_IP_AUTOALLOCATE: "true"
  PILOT_SKIP_VALIDATE_TRUST_DOMAIN: "true"
pilot:
  cni:
    namespace: istio-system
    enabled: true
profile: ambient
license:
  value: ${SOLO_ISTIO_LICENSE_KEY}
  # Uncomment if you prefer to specify your license secret
  # instead of an inline value.
  # secretRef:
  #   name: 
  #   namespace: 
EOF

helm upgrade --install istiod oci://${HELM_REPO}/istiod \
--namespace istio-system \
--version ${ISTIO_IMAGE} \
-f - <<EOF
global:
  hub: ${REPO}
  platform: openshift
  proxy:
    clusterDomain: cluster.local
  tag: ${ISTIO_IMAGE}
pilot:
  cni:
    namespace: kube-system
    enabled: true
meshConfig:
  accessLogFile: /dev/stdout
  defaultConfig:
    proxyMetadata:
      ISTIO_META_DNS_CAPTURE: "true"
env:
  PILOT_ENABLE_IP_AUTOALLOCATE: "true"
  PILOT_SKIP_VALIDATE_TRUST_DOMAIN: "true"
profile: ambient
license:
  value: ${SOLO_ISTIO_LICENSE_KEY}
  # Uncomment if you prefer to specify your license secret
  # instead of an inline value.
  # secretRef:
  #   name: 
  #   namespace: 
EOF

Install the Istio CNI node agent daemonset. Note that although the CNI is included in this section, it is technically not part of the control plane or data plane.

helm upgrade --install istio-cni oci://${HELM_REPO}/cni \
--namespace istio-system \
--version ${ISTIO_IMAGE} \
-f - <<EOF
ambient:
  dnsCapture: true
excludeNamespaces:
  - istio-system
  - kube-system
global:
  hub: ${REPO}
  tag: ${ISTIO_IMAGE}
profile: ambient
EOF

helm upgrade --install istio-cni oci://${HELM_REPO}/cni \
--namespace kube-system \
--version ${ISTIO_IMAGE} \
-f - <<EOF
ambient:
  dnsCapture: true
excludeNamespaces:
  - istio-system
  - kube-system
global:
  hub: ${REPO}
  platform: openshift
  tag: ${ISTIO_IMAGE}
profile: ambient
EOF

Verify that the components of the Istio ambient control plane are successfully installed. Because the Istio CNI is deployed as a daemon set, the number of CNI pods equals the number of nodes in your cluster. Note that it might take a few seconds for the pods to become available.

kubectl get pods -A | grep istio

Example output:

istio-system   istiod-85c4dfd97f-mncj5                             1/1     Running   0               40s
istio-system   istio-cni-node-pr5rl                                1/1     Running   0               9s
istio-system   istio-cni-node-pvmx2                                1/1     Running   0               9s
istio-system   istio-cni-node-6q26l                                1/1     Running   0               9s

Step 4: Deploy the ambient data plane

Install the ztunnel daemonset.

helm upgrade --install ztunnel oci://${HELM_REPO}/ztunnel \
--namespace istio-system \
--version ${ISTIO_IMAGE} \
-f - <<EOF
configValidation: true
enabled: true
env:
  L7_ENABLED: "true"
hub: ${REPO}
istioNamespace: istio-system
namespace: istio-system
profile: ambient
proxy:
  clusterDomain: cluster.local
tag: ${ISTIO_IMAGE}
terminationGracePeriodSeconds: 29
variant: distroless
EOF

helm upgrade --install ztunnel oci://${HELM_REPO}/ztunnel \
--namespace kube-system \
--version ${ISTIO_IMAGE} \
-f - <<EOF
configValidation: true
enabled: true
env:
  L7_ENABLED: "true"
global:
  platform: openshift
hub: ${REPO}
istioNamespace: istio-system
namespace: kube-system
profile: ambient
proxy:
  clusterDomain: cluster.local
tag: ${ISTIO_IMAGE}
terminationGracePeriodSeconds: 29
variant: distroless
EOF

Verify that the ztunnel pods are successfully installed. Because the ztunnel is deployed as a daemon set, the number of pods equals the number of nodes in your cluster. Note that it might take a few seconds for the pods to become available.
```
kubectl get pods -A | grep ztunnel
```
Example output:
```
ztunnel-tvtzn             1/1     Running   0          7s
ztunnel-vtpjm             1/1     Running   0          4s
ztunnel-hllxg             1/1     Running   0          4s
```

Add apps to the ambient mesh.
Link meshes together to create a multicluster mesh.
When it’s time to upgrade, see the Helm upgrade guide for ambient mesh.

Gloo Operator AKS extension