Downloading Offline Token

Click here to get the token
Click on Load Token

Use copy to clipboard function and provide it as a variable OFFLINE_ACCESS_TOKEN

OFFLINE_ACCESS_TOKEN="<PASTE_TOKEN_HERE>"

export TOKEN=$(curl 
--silent 
--data-urlencode "grant_type=refresh_token" 
--data-urlencode "client_id=cloud-services" 
--data-urlencode "refresh_token=${OFFLINE_ACCESS_TOKEN}" 
https://sso.redhat.com/auth/realms/redhat-external/protocol/openid-connect/token | 
jq -r .access_token)

Create a file (cluster-details) with following content. You can modfy this as per your environment.

export ASSISTED_SERVICE_API="api.openshift.com"
export CLUSTER_VERSION="4.8"
export CLUSTER_IMAGE="quay.io/openshift-release-dev/ocp-release:4.8.2-x86_64"
export CLUSTER_NAME="test-rgrs"
export CLUSTER_DOMAIN="home.lab"
export CLUSTER_NET_TYPE="openshiftSDN"
export CLUSTER_CIDR_NET="10.128.0.0/14"
export CLUSTER_CIDR_SVC="172.31.0.0/16"
export CLUSTER_HOST_NET="172.30.244.0/24"
export CLUSTER_HOST_PFX="23"
export CLUSTER_WORKER_HT="Enabled"
export CLUSTER_WORKER_COUNT="0"
export CLUSTER_MASTER_HT="Enabled"
export CLUSTER_MASTER_COUNT="0"
export CLUSTER_SSHKEY='<PUT-PUBLIC-SSH-KEY-HERE-AND-LEAVE-SINGLE-QUOTES>'

Export the variables in your environment
```
#source cluster-details.sh
```

Verify that you can communicate with API with following curl command

curl -s -X GET "https://$ASSISTED_SERVICE_API/api/assisted-install/v1/clusters" 
-H "accept: application/json" 
-H "Authorization: Bearer $TOKEN" 
| jq -r

Now download the pull secret from here and put it in a file pull-scret.txt
Create a variable with raw content of pull-secret.txt file.
```
PULL_SECRET=$(cat pull-secret.txt | jq -R .)
```

Create an Assisted-Service deployment.json file

cat << EOF > ./deployment.json
{
  "kind": "Cluster",
  "name": "$CLUSTER_NAME",
  "openshift_version": "$CLUSTER_VERSION",
  "ocp_release_image": "$CLUSTER_IMAGE",
  "base_dns_domain": "$CLUSTER_DOMAIN",
  "hyperthreading": "all",
  "cluster_network_cidr": "$CLUSTER_CIDR_NET",
  "cluster_network_host_prefix": $CLUSTER_HOST_PFX,
  "service_network_cidr": "$CLUSTER_CIDR_SVC",
  "user_managed_networking": true,
  "vip_dhcp_allocation": false,
  "host_networks": "$CLUSTER_HOST_NET",
  "hosts": [],
  "ssh_public_key": "$CLUSTER_SSHKEY",
  "pull_secret": $PULL_SECRET
}
EOF

Create the cluster via Assisted-Servcice API this will generate a “cluster id” whcih will need to be exported for future use.

 curl -s -X POST "https://$ASSISTED_SERVICE_API/api/assisted-install/v1/clusters" 
 -d @./deployment.json 
 --header "Content-Type: application/json" 
 -H "Authorization: Bearer $TOKEN" 
 | jq '.id'
 "6c0d6c3a-7c4e-4a2b-9448-5a00a0195914"

CLUSTER_ID="6c0d6c3a-7c4e-4a2b-9448-5a00a0195914"

Update the cluster install-config via the Assisted-Service API

 curl 
 --header "Content-Type: application/json" 
 --request PATCH 
 --data '"{"networking":{"networkType":"OpenshiftSDN"}}"' 
 -H "Authorization: Bearer $TOKEN" 
 "https://$ASSISTED_SERVICE_API/api/assisted-install/v1/clusters/$CLUSTER_ID/install-config"

Review your changes by issuing following curl command

curl -s -X GET 
--header "Content-Type: application/json" 
-H "Authorization: Bearer $TOKEN" 
"https://$ASSISTED_SERVICE_API/api/assisted-install/v1/clusters/$CLUSTER_ID/install-config" 
| jq -r

apiVersion: v1
baseDomain: home.lab
networking:
  networkType: Cilium
  clusterNetwork:
  - cidr: 10.128.0.0/14
    hostPrefix: 23
  machineNetwork:
  - cidr: 172.30.244.0/24
  serviceNetwork:
  - 172.31.0.0/16
metadata:
  name: test-rgrs
compute:
- hyperthreading: Enabled
  name: worker
  replicas: 0
controlPlane:
  hyperthreading: Enabled
  name: master
  replicas: 0
platform:
  none: {}
  vsphere: null
fips: false
pullSecret: 'Your-Pull-Secret'
sshKey: 'Your-SSH_KEY'

Now you will see a cluster created in https://console.redhat.com/openshift/assisted-installer/clusters
Click on cluster name for details. Review and click on “Next”
In Host discovery Tab click on Generate Discovery ISO button. Download the ISO and boot you VM/Baremetal with ISO.
In the networking tab review the details of service ip. Note that service IP is the one which we specified in cluster-details file
Proceed to click on Next and Install the cluster