Anthos Service Mesh 1.6

Installing Anthos Service Mesh on attached clusters

This guide explains how to do a clean installation of Anthos Service Mesh version 1.6.5-asm.1 on Anthos attached clusters. Use this guide to install Anthos Service Mesh on the following environments:

  • Amazon Elastic Kubernetes Service (Amazon EKS) on Kubernetes version 1.16
  • Microsoft Azure Kubernetes Service (Microsoft AKS) on Kubernetes version 1.16

The installation enables the supported features on your cluster for the asm-multicloud configuration profile.

Before you begin

Requirements

  • The user cluster that you install Anthos Service Mesh on has at least 4 vCPUs, 15 GB memory, and 4 replicas.

  • The cluster doesn't have Anthos Service Mesh or open source Istio installed.

  • To be included in the service mesh, service ports must be named, and the name must include the port's protocol in the following syntax: name: protocol[-suffix] where the square brackets indicate an optional suffix that must start with a dash. For more information, see Naming service ports.

Restrictions

Only one installation of Anthos Service Mesh per Google Cloud project is supported. Multiple mesh deployments in a single project aren't supported.

Setting up your environment

On your local machine, install and initialize the Cloud SDK (the gcloud command-line tool).

If you already have the Cloud SDK installed:

  1. Authenticate with the Cloud SDK:

    gcloud auth login

  2. Update the components:

    gcloud components update

  3. Install kubectl:

    gcloud components install kubectl

  4. Install kpt:

    gcloud components install kpt

  5. Get the Google Cloud project ID associated with your cluster:

    gcloud

    gcloud projects list

    Console

    1. In the Cloud Console, go to the Dashboard page:

      Go to the Dashboard page

    2. Click the Select from drop-down list at the top of the page. In the Select from window that appears, select your project. The project ID is displayed on the project Dashboard Project info card.

  6. Set the default project ID for the gcloud command-line tool:

    gcloud config set project PROJECT_ID

Setting credentials and permissions

  1. Ensure that you have kubectl for the GKE on-prem user cluster where you want to install Anthos Service Mesh. Note that you can install Anthos Service Mesh only on a GKE on-prem user cluster, not an admin cluster.
  2. Grant cluster admin permissions to the current user. You need these permissions to create the necessary role based access control (RBAC) rules for Anthos Service Mesh: 
    kubectl create clusterrolebinding cluster-admin-binding \
  --clusterrole=cluster-admin \
  --user="$(gcloud config get-value core/account)"

    If you see the "cluster-admin-binding" already exists error, you can safely ignore it and continue with the existing cluster-admin-binding.

Preparing to install Anthos Service Mesh

    Linux

  1. Download the Anthos Service Mesh installation file to your current working directory: 
    curl -LO https://storage.googleapis.com/gke-release/asm/istio-1.6.5-asm.1-linux-amd64.tar.gz
  2. Download the signature file and use openssl to verify the signature: 
    curl -LO https://storage.googleapis.com/gke-release/asm/istio-1.6.5-asm.1-linux-amd64.tar.gz.1.sig
openssl dgst -verify - -signature istio-1.6.5-asm.1-linux-amd64.tar.gz.1.sig istio-1.6.5-asm.1-linux-amd64.tar.gz <<'EOF'
-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEWZrGCUaJJr1H8a36sG4UUoXvlXvZ
wQfk16sxprI2gOJ2vFFggdq3ixF2h4qNBt0kI7ciDhgpwS8t+/960IsIgw==
-----END PUBLIC KEY-----
EOF

    The expected output is: Verified OK

  3. Extract the contents of the file to any location on your file system. For example, to extract the contents to the current working directory: 
    tar xzf istio-1.6.5-asm.1-linux-amd64.tar.gz

    The command creates an installation directory in your current working directory named istio-1.6.5-asm.1 that contains:

    • Sample applications in the samples directory.
    • The istioctl command-line tool that you use to install Anthos Service Mesh is in the bin directory.
    • The Anthos Service Mesh configuration profiles are in the install/kubernetes/operator/profiles directory.

    4. Mac OS

  4. Download the Anthos Service Mesh installation file to your current working directory: 
    curl -LO https://storage.googleapis.com/gke-release/asm/istio-1.6.5-asm.1-osx.tar.gz
  5. Download the signature file and use openssl to verify the signature: 
    curl -LO https://storage.googleapis.com/gke-release/asm/istio-1.6.5-asm.1-osx.tar.gz.1.sig
openssl dgst -sha256 -verify /dev/stdin -signature istio-1.6.5-asm.1-osx.tar.gz.1.sig istio-1.6.5-asm.1-osx.tar.gz <<'EOF'
-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEWZrGCUaJJr1H8a36sG4UUoXvlXvZ
wQfk16sxprI2gOJ2vFFggdq3ixF2h4qNBt0kI7ciDhgpwS8t+/960IsIgw==
-----END PUBLIC KEY-----
EOF

    The expected output is: Verified OK

  6. Extract the contents of the file to any location on your file system. For example, to extract the contents to the current working directory: 
    tar xzf istio-1.6.5-asm.1-osx.tar.gz

    The command creates an installation directory in your current working directory named istio-1.6.5-asm.1 that contains:

    • Sample applications in the samples directory.
    • The istioctl command-line tool that you use to install Anthos Service Mesh is in the bin directory.
    • The Anthos Service Mesh configuration profiles are in the install/kubernetes/operator/profiles directory.

    7. Windows

  7. Download the Anthos Service Mesh installation file to your current working directory: 
    curl -LO https://storage.googleapis.com/gke-release/asm/istio-1.6.5-asm.1-win.zip
  8. Download the signature file and use openssl to verify the signature: 
    curl -LO https://storage.googleapis.com/gke-release/asm/istio-1.6.5-asm.1-win.zip.1.sig
openssl dgst -verify - -signature istio-1.6.5-asm.1-win.zip.1.sig istio-1.6.5-asm.1-win.zip <<'EOF'
-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEWZrGCUaJJr1H8a36sG4UUoXvlXvZ
wQfk16sxprI2gOJ2vFFggdq3ixF2h4qNBt0kI7ciDhgpwS8t+/960IsIgw==
-----END PUBLIC KEY-----
EOF

    The expected output is: Verified OK

  9. Extract the contents of the file to any location on your file system. For example, to extract the contents to the current working directory: 
    tar xzf istio-1.6.5-asm.1-win.zip

    The command creates an installation directory in your current working directory named istio-1.6.5-asm.1 that contains:

    • Sample applications in the samples directory.
    • The istioctl command-line tool that you use to install Anthos Service Mesh is in the bin directory.
    • The Anthos Service Mesh configuration profiles are in the install/kubernetes/operator/profiles directory.

  10. Ensure that you're in the Anthos Service Mesh installation's root directory. 
    cd istio-1.6.5-asm.1
  11. For convenience, add the tools in the /bin directory to your PATH: 
    export PATH=$PWD/bin:$PATH

Installing Anthos Service Mesh

This section explains how to install Anthos Service Mesh and enable the Supported default features listed on the Supported features page for the asm-multicloud profile. For information on enabling the Supported optional features, such as STRICT mutual TLS (mTLS), see Enabling optional features.

To install Anthos Service Mesh:

istioctl install --set profile=asm-multicloud

Note the following differences from previous versions:

  • In Anthos Service Mesh versions 1.4 and 1.5, you must use istioctl manifest apply. In Anthos Service Mesh 1.6+, istioctl install works the same as istioctl manifest apply.

  • The asm-multicloud profile is new for 1.6. In Anthos Service Mesh 1.4 and 1.5, the profile name that you specify on the command line is asm-onprem.

Check the control plane components

Check that the control plane pods in istio-system are up:

kubectl get pod -n istio-system

Expected output is similar to the following:

NAME                                      READY   STATUS      RESTARTS   AGE
istio-ingressgateway-74cc894bfd-786rg     1/1     Running     0          7m19s
istiod-78cdbbbdb-d7tps                    1/1     Running     0          7m36s
promsd-576b8db4d6-lqf64                   2/2     Running     1          7m19s

If the output of the command shows that one or more components aren't in a Running state, refer to Troubleshooting Anthos on attached clusters for a script that you can run to get details about the components.

Apply the configuration changes specified in ISTIO-SECURITY-2020-007 to prevent Denial of Service (DOS) attacks on your mesh.

Injecting sidecar proxies

Anthos Service Mesh uses sidecar proxies to enhance network security, reliability, and observability. With Anthos Service Mesh, these functions are abstracted away from the application's primary container and implemented in a common out-of-process proxy delivered as a separate container in the same Pod.

Any workloads that were running on your cluster before you installed Anthos Service Mesh need to have the sidecar proxy injected or updated so they have the current Anthos Service Mesh version. Before you deploy new workloads, make sure to configure sidecar proxy injection so that Anthos Service Mesh can monitor and secure traffic.

You can enable automatic sidecar injection with one command, for example:

kubectl label namespace NAMESPACE istio-injection=enabled --overwrite

where NAMESPACE is the name of the namespace for your application's services or default if you didn't explicitly create a namespace.

For more information, see Injecting sidecar proxies.

Deploying a sample application

Anthos Service Mesh provides a preconfigured ingress gateway, the istio-ingressgateway, that you can use to manage inbound traffic to applications running on your service mesh. To make applications accessible from outside of your cluster, (such as from a browser):

  • You need to get the external IP address of the istio-ingressgateway.

  • Your application must define a Gateway and VirtualService resource, similar to the Online Boutique sample application's frontend-gateway.yaml.

To deploy and run the sample application

  1. Download the sample:

    kpt pkg get \
https://github.com/GoogleCloudPlatform/microservices-demo.git/release \
microservices-demo

  2. Enable automatic sidecar injection:

    kubectl label namespace default istio-injection=enabled

  3. Deploy the sample to the cluster:

    kubectl apply -f microservices-demo

To get the external IP address of the istio-ingressgateway:

  1. Create the host key environment variable:

    Microsoft AKS

      export HOST_KEY="ip"

    Amazon EKS

      export HOST_KEY="hostname"

  2. Create the INGRESS_HOST environment variable:

    export INGRESS_HOST=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.status.loadBalancer.ingress[0].'"$HOST_KEY"'}')

  3. Create the INGRESS_PORT environment variable:

    export INGRESS_PORT=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.spec.ports[?(@.name=="http2")].port}')

  4. Visit the application on your browser. In the following URL, replace EXTERNAL_IP with $INGRESS_HOST:$INGRESS_PORT:

    http://EXTERNAL_IP/

When you're finished exploring, remove the sample:

kubectl delete -f microservices-demo