Step 3: Install apigeectl

This step explains how to download and install apigeectl on your Anthos GKE deployed on-prem admin machine. Steps include setting up the installation directories, creating Google Cloud service accounts that are required for hybrid components to communicate, and creating TLS credentials that are required for Apigee hybrid to operate.

Download and install `apigeectl`

apigeectl is the command-line interface (CLI) for installing and managing Apigee hybrid in a Kubernetes cluster.

The following steps describe how to get apigeectl:

Store the latest version number in a variable using the following command:

export VERSION=$(curl -s \
    https://storage.googleapis.com/apigee-release/hybrid/apigee-hybrid-setup/current-version.txt?ignoreCache=1)

Check that the variable was populated with a version number using the following command. If you want to use a different version, you can save that in an environment variable instead.
```
echo $VERSION
```

Download the release package for your operating system using the following command:

Mac 64 bit:

curl -LO \
    https://storage.googleapis.com/apigee-release/hybrid/apigee-hybrid-setup/$VERSION/apigeectl_mac_64.tar.gz

Linux 64 bit:

curl -LO \
    https://storage.googleapis.com/apigee-release/hybrid/apigee-hybrid-setup/$VERSION/apigeectl_linux_64.tar.gz

Mac 32 bit:

curl -LO \
    https://storage.googleapis.com/apigee-release/hybrid/apigee-hybrid-setup/$VERSION/apigeectl_mac_32.tar.gz

Linux 32 bit:

curl -LO \
    https://storage.googleapis.com/apigee-release/hybrid/apigee-hybrid-setup/$VERSION/apigeectl_linux_32.tar.gz

Create a directory on your system to serve as the base directory for the Apigee hybrid installation.
Extract the downloaded gzip file contents into the base directory you just created using the following command:
```
tar xvzf filename.tar.gz -C path-to-base-directory
```
Change directory to the base directory using the cd command.
The tar contents are, by default, expanded into a directory with the version and platform in its name. For example: ./apigeectl_1.0.0-f7b96a8_linux_64. Rename that directory to apigeectl using the following command:
```
mv apigeectl_1.0.0-f7b96a8_linux_64 apigeectl
```
Change to the directory using the following command:
```
cd ./apigeectl
```
This directory is the apigeectl home directory. It is where the apigeectl executable command is located.
Create an environment variable to hold this home directory path using the following command:
```
export APIGEECTL_HOME=$PWD
```
Verify that the variable holds the correct path using the following command:
```
echo $APIGEECTL_HOME
```

Set up the project directory structure

The following directory structure is a suggested approach. It separates Apigee hybrid release software from configuration files that you must create. Through the use of the $APIGEECTL_HOME variable and symbolic links that you create, you can easily switch to a new software version if you choose to. See also Upgrading Apigee hybrid.

Be sure you are in the base directory (the directory where the apigeectl directory is located) by using the following command:
```
cd $APIGEECTL_HOME/..
```
Create a new folder called hybrid-files using the following command. You can give the directory any name you wish, but in the docs, the name hybrid-files is used consistently. Later, you will store configuration files, service account keys, and TLS certificates in this folder. This folder lets you keep your config files separate from the apigeectl software installation.
```
mkdir hybrid-files
```

The current directory structure now looks like the following:

pwd && ls
/hybrid-base-directory
  apigeectl
  hybrid-files

Change directory into the hybrid-filesfolder using the following command:
```
cd hybrid-files
```
Inside the hybrid-files directory, create the following subdirectories to organize files that you will create later:
```
mkdir overrides
mkdir service-accounts
mkdir certs
```
Inside the hybrid-files directory, create the following symbolic links to $APIGEECTL_HOME. These links allow you to run the apigeectl command from inside the hybrid-files directory as the following example shows:
Note: If this is not the first time you have used this process, the following symbolic links may already exist. Check to see if the links already exist using the following command. If the directories exist, skip this step.
```
ls -l | grep ^l
```
```
ln -s $APIGEECTL_HOME/tools tools
ln -s $APIGEECTL_HOME/config config
ln -s $APIGEECTL_HOME/templates templates
ln -s $APIGEECTL_HOME/plugins plugins
```
To check that the symlinks were created correctly, execute the following command and make sure the link paths point to the correct locations:
```
ls -l | grep ^l
```

Create service accounts

Apigee hybrid uses Google Cloud service accounts to allow hybrid components to communicate by making authorized API calls. In this step, you use an Apigee hybrid command-line tool to create a set of services accounts. The tool also downloads the service account private keys for you. You must then add these keys to your Apigee hybrid cluster configuration file.

Apigee provides a tool, create-service-account, that creates the service account, assigns the roles to the service account, and creates and downloads the key files for the service account in a single command. To learn about the related Google Cloud concepts, see Creating and managing service accounts and Creating and managing service account keys.

Be sure that you are in the base_directory/hybrid-files directory you configured in Set up the project directory structure.

Execute the following command from inside the hybrid-files directory. This command creates a service account for the apigee-metrics component and places the downloaded key in the ./service-accounts directory.

./tools/create-service-account apigee-metrics ./service-accounts

When you see the following prompt, enter y:

[INFO]: gcloud configured project ID is project_id.
 Press: y to proceed with creating service account in project: project_id
 Press: n to abort.

If this is the first time an SA with the exact name assigned by the tool was created, then the tool just creates it, and you do not have to do anything further.

If, however, you see the following message and prompt, enter y to generate new keys:

[INFO]: Service account apigee-metrics@project_id.iam.gserviceaccount.com already exists.
...
 [INFO]: The service account might have keys associated with it. It is recommended to use existing keys.
 Press: y to generate new keys.(this does not de-activate existing keys)
 Press: n to skip generating new keys.

Now, create the rest of the service accounts using the following commands. The create-service-account command is interactive and requires a response for each account.

./tools/create-service-account apigee-synchronizer ./service-accounts

./tools/create-service-account apigee-udca ./service-accounts

./tools/create-service-account apigee-mart ./service-accounts

./tools/create-service-account apigee-cassandra ./service-accounts

./tools/create-service-account apigee-logger ./service-accounts

./tools/create-service-account apigee-watcher ./service-accounts

Verify that the service account keys were created using the following command. You are responsible for storing these private keys securely. The key filenames are prefixed with the name of your Google Cloud project.

ls ./service-accounts

The result should look something like the following:

gcp-project-id-apigee-cassandra.json
gcp-project-id-apigee-logger.json
gcp-project-id-apigee-mart.json
gcp-project-id-apigee-metrics.json
gcp-project-id-apigee-synchronizer.json
gcp-project-id-apigee-udca.json
gcp-project-id-apigee-watcher.json

Assign the Apigee Organization Admin role to the apigee-org-admin service accounts:
Verify that the email address for the apigee-org-admin service account follows the pattern service_account@PROJECT_ID.iam.gserviceaccount.com as the following example shows:
```
gcloud iam service-accounts list --filter "apigee-org-admin"
```
Assign the role with the following command:
```
gcloud projects add-iam-policy-binding $PROJECT_ID \
--member serviceAccount:apigee-org-admin@$PROJECT_ID.iam.gserviceaccount.com --role roles/apigee.admin
```
Where PROJECT_ID is your Google Cloud project. If your service account email addresses differ from this pattern, replace them accordingly.

The output should include a list of all the service accounts and their roles, including the following:
```
- members:
  - serviceAccount:apigee-org-admin@hybrid-example-2.iam.gserviceaccount.com
  role: roles/apigee.admin
```

Create TLS certificates

You are required to provide TLS certificates for the runtime ingress gateway in your Apigee hybrid configuration. For the purpose of this quickstart (a non-production trial installation), the runtime gateway can accept self-signed credentials. In the following steps, openssl is used to generate the self-signed credentials.

In this step, you will create the TLS credential files and add them to the base_directory/hybrid-files/certs directory. In Step 4: Configure the cluster, you will add the file paths to the cluster configuration file.

Be sure that you are in the base_directory/hybrid-files directory you configured in Set up the project directory structure.
Make sure your domain name is saved to the DOMAIN environment variable using the following command:
```
echo $DOMAIN
```
Execute the following command from inside the hybrid-files directory:
```
openssl req  -nodes -new -x509 -keyout ./certs/keystore.key -out \
    ./certs/keystore.pem -subj '/CN='$DOMAIN'' -days 3650
```
Where DOMAIN is the domain you reserved for your hybrid installation in Quickstart (hybrid) Step 5: Configure your DNS.

This command creates a self-signed certificate/key pair that you can use for the quickstart installation.
Check to make sure the files are in the ./certs directory using the following command:
```
ls ./certs
  keystore.pem
  keystore.key
```
Where keystore.pem is the self-signed TLS certificate file and keystore.key is the key file.

You now have a home base from which you can configure, deploy, and manage Apigee hybrid in your Kubernetes cluster. Next, you will create a file that is used by Kubernetes to deploy the hybrid runtime components to the cluster.

1 2 3 (NEXT) Step 4: Configure the cluster 5