(feat): add ZQ1 otterscan deployment how-to

docs/deployment.md

@@ -0,0 +1,53 @@
+# Deployment instructions
+
+Simple step-by-step guide on how to deploy Zilliqa/otterscan on
+both ZQ1 and ZQ2 infrastructure.
+
+For ZQ1 you have to reproduces the steps below for each ZQ1 deployment
+(devnet, testnet and mainnet).
+
+# ZQ1 - Otterscan deployment
+
+### 1 - connect to the relevant bastion host
+
+ * Log in: `gcloud auth login --update-adc`
+ * SSH into the bastion:
+
+    * mainnet: gcloud compute ssh --zone asia-southeast1-a vm-p-zq1-mainnet-bastion-ase1 --tunnel-through-iap --project prj-p-zq1-mainnet-r93y8kg5
+
+    * testnet: gcloud compute ssh vm-d-zq1-testnet-bastion-ase1 --zone asia-southeast1-a --project=prj-d-zq1-testnet-mddymaog
+
+
+    * devnet: gcloud compute ssh vm-d-zq1-testnet-bastion-ase1 --zone asia-southeast1-a --project=prj-d-zq1-testnet-mddymaog
+
+ * Switch to the `devops` user: `sudo su - devops`
+
+### 2 - change to the `testnet` directory
+
+ * `cd testnet`
+
+### 3 - update the deployment manifests for the running ZQ1 instance
+
+* Switch into the running instance directory: `cd <network-name>`
+* Create a backup of the otterscan deployment manifest: `cp -vp manifest/otterscan.yaml{,.$(date +%Y%m%d)}`
+* Update the manifest image to the version you want to deploy, or latest to pick up always the `latest` published from the stable `main` branch. here the snippet on how you do it:
+```
+-x-
+spec:
+      containers:
+        - name: otterscan
+          image: zilliqa/otterscan:latest
+          imagePullPolicy: Always
+-x-
+```
+* Replace the running deployment: `./testnet.sh replace otterscan`
+* Take the cluster context for the deployment you want update: `grep primary_cluster_name ./testnet.sh`
+* Get the otterscan pod name: `kubectl get po --context=<cluster name from above command> | grep otterscan`
+* Delete the old otterscan pod:
+```
+kubectl delete po --context=<cluster name from above command> <otterscan pod name>
+```
+
+# TODO
+
+[] Create the ZQ2 deployment procedure