From 3e9e1d272d093e830ce961b0a94c54feb43bb09f Mon Sep 17 00:00:00 2001
From: Tom Wieczorek <twieczorek@mirantis.com>
Date: Wed, 11 Oct 2023 15:15:48 +0200
Subject: [PATCH] Reclaim GitHub Runner disk space

GitHub runners provide 14GB of guaranteed available disk space, which is
typically sufficient for running k0s's integration tests. However, when
free space drops below 15%, Kubernetes initiates pod eviction, leaving
only 5GB left on an 84GB disk until it kicks in. In response, streamline
disk space usage and remove non-essential data. That's easier than
globally overriding Kubernetes eviction defaults for all integration
tests.

Signed-off-by: Tom Wieczorek <twieczorek@mirantis.com>
(cherry picked from commit b0579239a65c02c6960a820bc8f96899f5ba5dda)
(cherry picked from commit 603e6952d67b86cd49bf528f9dc4c503f6ff963f)
(cherry picked from commit be6211f673ff302dcbaaa233ab6d33ee548f8f8e)
---
 .github/workflows/go.yml                       |  6 ++++++
 .../workflows/reclaim-runner-disk-space.bash   | 18 ++++++++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100755 .github/workflows/reclaim-runner-disk-space.bash

diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index fc8f460d936d..b6e102c8ebf4 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -195,6 +195,9 @@ jobs:
       - name: Check out code into the Go module directory
         uses: actions/checkout@v3
 
+      - name: Reclaim runner disk space
+        run: .github/workflows/reclaim-runner-disk-space.bash
+
       - name: Prepare build environment
         run: .github/workflows/prepare-build-env.sh
 
@@ -290,6 +293,9 @@ jobs:
       - name: Check out code into the Go module directory
         uses: actions/checkout@v3
 
+      - name: Reclaim runner disk space
+        run: .github/workflows/reclaim-runner-disk-space.bash
+
       - name: Prepare build environment
         run: .github/workflows/prepare-build-env.sh
 
diff --git a/.github/workflows/reclaim-runner-disk-space.bash b/.github/workflows/reclaim-runner-disk-space.bash
new file mode 100755
index 000000000000..16bd8bd2f6a4
--- /dev/null
+++ b/.github/workflows/reclaim-runner-disk-space.bash
@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+set +eux
+
+if [ -z "$GITHUB_RUN_ID" ]; then
+  echo "Cowardly refusing to destroy a machine that doesn't look like a GitHub runner." >&2
+  exit 0
+fi
+
+df -h /
+
+docker system prune --all --force &
+sudo rm -rf /imagegeneration/installers &
+sudo rm -rf -- "${ANDROID_SDK_ROOT-/opt/nevermind}" &
+
+wait
+
+df -h /