update readme, allocate elastic ip as part of setup

README.md

@@ -0,0 +1,50 @@
+# Full Node BSC
+
+## goal
+
+spins up a geth full node for binance smart chain using teraform and ansible
+
+### requirements
+
+env vars:
+
+```bash
+export TF_VAR_AWS_ACCESS_KEY=""
+export TF_VAR_AWS_SECRET_KEY=""
+export TF_VAR_SSH_PASSWORD=""  # to be used on logins without ssh keypair
+export TF_VAR_REGION=""
+```
+
+- aws-cli
+- terraform
+- ansible
+- jq (for parsing json)
+
+ssh keys (`~/.ssh/id_rsa` and `~/.ssh/id_rsa.pub`)
+
+### setup
+
+get an ip address alocated and append to ansible hosts, export the address to env
+
+```bash
+aws ec2 allocate-address > /etc/allocated-address
+export BSC_NODE_IP=$(cat /etc/allocated-address | jq -r ".PublicIp")
+export TF_VAR_ALLOCATION_ID=$(cat /etc/allocated-address | jq -r ".AllocationId")
+echo $BSC_NODE_IP >> /etc/ansible/hosts
+```
+
+in case one would prefer to maintain the same address, the setting of the `BSC_NODE_IP`
+and `TF_VAR_ALLOCATION_ID` variables can be appended to ~/.profile or ~/.bashrc
+
+### usage
+
+start the instance
+
+```bash
+terraform init && terraform apply
+ssh -i ~/.ssh/id_rsa ubuntu@$BSC_NODE_IP
+```
+
+```bash
+git clone https://github.com/ethereum/go-ethereum
+```

ansible/main.yaml

@@ -0,0 +1,6 @@
+---
+- name: First Task
+  hosts: all
+  tasks:
+    - name: Leaving a mark
+      command: "touch /tmp/mark"

terraform/variables.tf

@@ -20,6 +20,5 @@ variable "SSH_PASSWORD" {
 
 variable "ALLOCATION_ID" {
   type      = string
-  sensitive = false
-  default   = "eipalloc-0c57be50bb3a7471b"
+  sensitive = true
 }