add slight more work to figure out the hostnames

It is still a bit of a hack. Ideally we can add identifiable hostnames
to the /etc/hosts of each. I am having trouble debugging because
there seems to be some delay in the info being available with the aws
Python sdk, and then I am not able to always shell into instances with
my PEM

Signed-off-by: vsoch <vsoch@users.noreply.github.com>

README.md

@@ -51,15 +51,7 @@ We will be developing this further to run usernetes. Next steps are:
 2. Install rootless docker (by the user on startup)
 3. Individual commands for control plane / workers to setup usernetes
 
-TBA! You can look at the startup
-
- script logs like this if you need to debug.
-
-```bash
-$ cat /var/log/cloud-init-output.log
-```
-
-That's it. Enjoy!
+Follow the commands in the examples basic README.md for next steps.
 
 ## License
 

examples/basic/README.md

@@ -27,3 +27,32 @@ export TF_VAR_aws_secret=$AWS_SECRET_ACCESS_KEY
 export TF_VAR_aws_key=$AWS_ACCESS_KEY_ID 
 export TF_VAR_aws_session=$AWS_SESSION_TOKEN 
 ```
+
+### Usage
+
+Change your key in the [main.tf](main.tf) and then bring up the cluster:
+
+```bash
+make
+```
+You'll need to get instance connection strings from the AWS console. And then typically
+you need to login as the ubuntu user, and with your pem:
+
+```bash
+$ ssh -i "key.pem" -o "IdentitiesOnly=yes" ubuntu@ec2-44-198-52-73.compute-1.amazonaws.com
+```
+
+You can look at the startup script logs like this if you need to debug.
+
+```bash
+$ cat /var/log/cloud-init-output.log
+```
+
+Next steps are:
+
+1. Get hostnames / addresses into /etc/hosts
+2. Install rootless docker (by the user on startup)
+3. Individual commands for control plane / workers to setup usernetes
+
+I started on step 1, but am having trouble just ssh-ing into instances (sometimes I always get permission denied, and then the hostname does not
+take). If/when we get that working, we will want to mimic the steps [here](https://github.com/converged-computing/usernetes-terraform-gcp/tree/main/examples/basic). To make things easier we likely want to add logic to the above to define a hostname for the control plane, etc. that is written to each. The main difference in design is that GCP gives predictable hostnames, and aws does not.

examples/basic/main.tf

@@ -2,14 +2,14 @@
 # VARIABLES # for you to edit!
 
 locals {
-  name          = "usernetes"
-  pwd           = basename(path.cwd)
-  region        = "us-east-1"
+  name   = "usernetes"
+  pwd    = basename(path.cwd)
+  region = "us-east-1"
   # Output AMI from build-images
   ami           = "ami-0a71a4436084046bc"
   instance_type = "m4.large"
   vpc_cidr      = "10.0.0.0/16"
-  key_name      = "<Your-key-here>"
+  key_name      = "<My-Key-Id>"
 
   # Must be larger than ami
   volume_size = 30
@@ -45,8 +45,8 @@ terraform {
 # Read in a shared script to init / finalize the setup
 data "template_file" "startup_script" {
   template = templatefile("../scripts/setup.sh", {
-    selector_name  = local.name,
-    desired_size   = local.desired_size
+    selector_name = local.name,
+    desired_size  = local.desired_size
   })
 }
 

examples/scripts/setup.sh

@@ -12,18 +12,10 @@ done
 found_count=$(aws ec2 describe-instances --region us-east-1 --filters "Name=tag:selector,Values=${selector_name}-selector" | jq .Reservations[].Instances[].NetworkInterfaces[].PrivateIpAddress | wc -l)
 echo "Desired count $found_count is reached"
 
-# Update the config files with our hosts - we need the ones from hostname
-hosts=$(aws ec2 describe-instances --region us-east-1 --filters "Name=tag:selector,Values=${selector_name}-selector" | jq -r .Reservations[].Instances[].NetworkInterfaces[].PrivateIpAddresses[].PrivateDnsName)
-
-# Write them into /etc/hosts
-NODELIST=""
-for host in $hosts; do
-   if [[ "$NODELIST" == "" ]]; then
-      NODELIST=$host
-   else
-      NODELIST=$NODELIST,$host   
-   fi
-done
+# Extra sleep for good measure lol
+sleep 10
 
-# Write hostlist somewhere we can find it
-sudo echo $NODELIST >> /opt/hostlist.txt
+# Update the config files with our hosts - we need the ones from hostname
+wget https://gist.githubusercontent.com/vsoch/275b865921605e54ab48087e8036dae2/raw/bb7c663abf8cd3f016847fdf668a7a241c768b27/write-hostlist.sh
+chmod +x write-hostlist.sh
+./write-hostlist.sh $selector_name-selector