test: use the first five chars of md5sum of unique workflow run identifier.

The tuple (repo, run_id, run_attempt) identifies a run, however this is too
long for the terraform talos name. So we use this to generate a 5-digit hash
instead of using random 3 digit ids which are prone to collisions.

Signed-off-by: Tom Hadlaw <tom.hadlaw@isovalent.com>

Author: tommyp1ckles

.github/workflows/conformance-13-pr.yml

@@ -60,7 +60,7 @@ jobs:
           ./create-ci-env.sh \
             --kube-proxy ${{ matrix.config.kube-proxy}} \
             --talos-version ${{ matrix.talos }} \
-            --pr ${{ github.run_number }} \
+            --pr "${{ github.event.repository.name }}-${{ github.run_id }}-${{ github.run_attempt }}" \
             --owner "isovalent/terraform-aws-talos"
           make apply
       - name: Install Cilium CLI

.github/workflows/conformance-13.yml

@@ -132,7 +132,7 @@ jobs:
           ./create-ci-env.sh \
             --kube-proxy ${{ matrix.config.kube-proxy}} \
             --talos-version ${{ matrix.talos }} \
-            --pr ${{ github.run_number }} \
+            --pr "${{ github.event.repository.name }}-${{ github.run_id }}-${{ github.run_number }}-${{ github.run_attempt }}" \
             --owner "isovalent/terraform-aws-talos"
           make apply
       - name: Install Cilium CLI

.github/workflows/conformance-pr.yml

@@ -57,7 +57,7 @@ jobs:
           ./create-ci-env.sh \
             --kube-proxy ${{ matrix.config.kube-proxy}} \
             --talos-version ${{ matrix.talos }} \
-            --pr ${{ github.run_number }} \
+            --pr "${{ github.event.repository.name }}-${{ github.run_id }}-${{ github.run_number}}-${{ github.run_attempt }}" \
             --owner "isovalent/terraform-aws-talos"
           make apply
       - name: Install Cilium CLI

.github/workflows/conformance.yml

@@ -119,7 +119,7 @@ jobs:
           ./create-ci-env.sh \
             --kube-proxy ${{ matrix.config.kube-proxy}} \
             --talos-version ${{ matrix.talos }} \
-            --pr ${{ github.run_number }} \
+            --pr "${{ github.event.repository.name }}-${{ github.run_id }}-${{ github.run_number }}-${{ github.run_attempt }}" \
             --owner "isovalent/terraform-aws-talos"
           make apply
       - name: Install Cilium CLI

test/conformance/create-ci-env.sh

@@ -80,17 +80,15 @@ if [ -z "$kube_proxy" ] && [ -z "$talos_version" ] && [ -z "$owner" ]; then
     usage
 fi
 
-
-pr_name=$(head -c 15 <<< ${pr_name})
-num=$(head -c 3 <<< ${RANDOM})
+id=$(md5sum <<< ${pr_name} | head -c 5)
 
 disable_kube_proxy=false
 if [ ${kube_proxy} == "false" ]; then
 	disable_kube_proxy=true
 fi
 
 cat > env.tfvars << EOF
-cluster_name = "talos-e2e-${pr_name}-${num}"
+cluster_name = "talos-e2e-${id}"
 region = "us-east-2"
 owner = "${owner}"
 talos_version = "${talos_version}"