From 3defcac98e3d2ee5bfd1f0a2a7a143508177bf83 Mon Sep 17 00:00:00 2001
From: Birol Bilgin <birol@cilium.io>
Date: Wed, 24 May 2023 06:42:17 +0200
Subject: [PATCH] ci: fix gke network starvation

With current defaults, the number of clusters that can be
provisioned simultaneously in the same project is around 31.

This commit changes default subnet range to /26,
pod ip range to /21 and service ip range to /24.

After these changes max clusters that
can be provisioned will be more then 3500.

Signed-off-by: Birol Bilgin <birol@cilium.io>
---
 .github/workflows/externalworkloads.yaml | 3 +++
 .github/workflows/gke.yaml               | 4 +++-
 .github/workflows/multicluster.yaml      | 8 ++++++--
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/externalworkloads.yaml b/.github/workflows/externalworkloads.yaml
index 62a1a6b403..d6bc3a7382 100644
--- a/.github/workflows/externalworkloads.yaml
+++ b/.github/workflows/externalworkloads.yaml
@@ -120,6 +120,9 @@ jobs:
           gcloud container clusters create ${{ env.clusterName }} \
             --labels "usage=${{ github.repository_owner }}-${{ github.event.repository.name }},owner=${{ steps.vars.outputs.owner }}" \
             --zone ${{ env.zone }} \
+            --enable-ip-alias \
+            --cluster-ipv4-cidr="/21" \
+            --services-ipv4-cidr="/24" \
             --image-type COS_CONTAINERD \
             --num-nodes 2 \
             --machine-type e2-custom-2-4096 \
diff --git a/.github/workflows/gke.yaml b/.github/workflows/gke.yaml
index 0081e2ad79..a68b0591d8 100644
--- a/.github/workflows/gke.yaml
+++ b/.github/workflows/gke.yaml
@@ -100,7 +100,9 @@ jobs:
             --labels "usage=${{ github.repository_owner }}-${{ github.event.repository.name }},owner=${{ steps.vars.outputs.owner }}" \
             --zone ${{ env.zone }} \
             --enable-ip-alias \
-            --create-subnetwork="" \
+            --create-subnetwork="range=/26" \
+            --cluster-ipv4-cidr="/21" \
+            --services-ipv4-cidr="/24" \
             --image-type COS_CONTAINERD \
             --num-nodes 2 \
             --machine-type e2-custom-2-4096 \
diff --git a/.github/workflows/multicluster.yaml b/.github/workflows/multicluster.yaml
index 0c39be0921..9c3b2e7962 100644
--- a/.github/workflows/multicluster.yaml
+++ b/.github/workflows/multicluster.yaml
@@ -110,7 +110,9 @@ jobs:
             --labels "usage=${{ github.repository_owner }}-${{ github.event.repository.name }},owner=${{ steps.vars.outputs.owner }}" \
             --zone ${{ env.zone }} \
             --enable-ip-alias \
-            --create-subnetwork="" \
+            --create-subnetwork="range=/26" \
+            --cluster-ipv4-cidr="/21" \
+            --services-ipv4-cidr="/24" \
             --image-type COS_CONTAINERD \
             --num-nodes 2 \
             --machine-type e2-custom-2-4096 \
@@ -134,7 +136,9 @@ jobs:
             --labels "usage=${{ github.repository_owner }}-${{ github.event.repository.name }},owner=${{ steps.vars.outputs.owner }}" \
             --zone ${{ env.zone }} \
             --enable-ip-alias \
-            --create-subnetwork="" \
+            --create-subnetwork="range=/26" \
+            --cluster-ipv4-cidr="/21" \
+            --services-ipv4-cidr="/24" \
             --image-type COS_CONTAINERD \
             --num-nodes 2 \
             --machine-type e2-custom-2-4096 \