6 files changed, 35 insertions, 2 deletions
diff --git a/contrib/cirrus/check_image.sh b/contrib/cirrus/check_image.sh
index 67e807d61..690a38119 100755
--- a/contrib/cirrus/check_image.sh
+++ b/contrib/cirrus/check_image.sh
@@ -36,4 +36,10 @@ do
         "$(systemctl list-unit-files --no-legend $REQ_UNIT)" = "$REQ_UNIT enabled" || let "RET+=1"
 done
 
+# Exits zero if any unit matching pattern is running
+UNIT_STATUS=$(systemctl is-active $EVIL_UNITS; echo $?)
+item_test "No interfering background units are active:" \
+    "$UNIT_STATUS" -ne "0" || let "RET+=1"
+
+echo "Total failed tests: $RET"
 exit $RET
diff --git a/contrib/cirrus/lib.sh b/contrib/cirrus/lib.sh
index b2fcaa749..a9da3f4ce 100644
--- a/contrib/cirrus/lib.sh
+++ b/contrib/cirrus/lib.sh
@@ -45,6 +45,7 @@ fi
 # Defaults when not running under CI
 export CI="${CI:-false}"
 CIRRUS_CI="${CIRRUS_CI:-false}"
+DEST_BRANCH="${DEST_BRANCH:-master}"
 CONTINUOUS_INTEGRATION="${CONTINUOUS_INTEGRATION:-false}"
 CIRRUS_REPO_NAME=${CIRRUS_REPO_NAME:-libpod}
 CIRRUS_BASE_SHA=${CIRRUS_BASE_SHA:-unknown$(date +%s)}  # difficult to reliably discover
@@ -77,6 +78,9 @@ ROOTLESS_ENV_RE='(CIRRUS_.+)|(ROOTLESS_.+)|(.+_IMAGE.*)|(.+_BASE)|(.*DIRPATH)|(.
 # Unsafe env. vars for display
 SECRET_ENV_RE='(IRCID)|(ACCOUNT)|(^GC[EP]..+)|(SSH)'
 
+# Names of systemd units which should never be running
+EVIL_UNITS="cron crond atd apt-daily-upgrade apt-daily fstrim motd-news systemd-tmpfiles-clean"
+
 SPECIALMODE="${SPECIALMODE:-none}"
 TEST_REMOTE_CLIENT="${TEST_REMOTE_CLIENT:-false}"
 export CONTAINER_RUNTIME=${CONTAINER_RUNTIME:-podman}
@@ -349,6 +353,20 @@ remove_packaged_podman_files(){
     done
 }
 
+systemd_banish(){
+    echo "Disabling periodic services that could destabilize testing:"
+    set +e  # Not all of these exist on every platform
+    for unit in $EVIL_UNITS
+    do
+        ooe.sh sudo systemctl stop $unit
+        ooe.sh sudo systemctl disable $unit
+        ooe.sh sudo systemctl disable $unit.timer
+        ooe.sh sudo systemctl mask $unit
+        ooe.sh sudo systemctl mask $unit.timer
+    done
+    set -e
+}
+
 _finalize(){
     set +e  # Don't fail at the very end
     set +e  # make errors non-fatal
diff --git a/contrib/cirrus/notice_master_failure.sh b/contrib/cirrus/notice_branch_failure.sh
index 1fc15cdf9..423231dfd 100755
--- a/contrib/cirrus/notice_master_failure.sh
+++ b/contrib/cirrus/notice_branch_failure.sh
@@ -9,10 +9,10 @@ ETX="$(echo -n -e '\x03')"
 RED="${ETX}4"
 NOR="$(echo -n -e '\x0f')"
 
-if [[ "$CIRRUS_BRANCH" =~ "master" ]]
+if [[ "$CIRRUS_BRANCH" = "$DEST_BRANCH" ]]
 then
     BURL="https://cirrus-ci.com/build/$CIRRUS_BUILD_ID"
-    ircmsg "${RED}[Action Recommended]: ${NOR}Post-merge testing ${RED}$CIRRUS_BRANCH failed${NOR} in $CIRRUS_TASK_NAME on $(OS_RELEASE_ID)-$(OS_RELEASE_VER): $BURL.  Please investigate, and re-run if appropriate."
+    ircmsg "${RED}[Action Recommended]: ${NOR}Post-merge testing on ${RED}$CIRRUS_BRANCH failed${NOR} in $CIRRUS_TASK_NAME on $(OS_RELEASE_ID)-$(OS_RELEASE_VER): $BURL.  Please investigate, and re-run if appropriate."
 fi
 
 # This script assumed to be executed on failure
diff --git a/contrib/cirrus/packer/fedora_base-setup.sh b/contrib/cirrus/packer/fedora_base-setup.sh
index a425b2b57..788a54c34 100644
--- a/contrib/cirrus/packer/fedora_base-setup.sh
+++ b/contrib/cirrus/packer/fedora_base-setup.sh
@@ -27,6 +27,9 @@ ooe.sh systemctl enable rngd
 echo "Setting cloud-init service to start after google-network-daemon.service"
 cp -v $GOSRC/$PACKER_BASE/cloud-init/fedora/cloud-init.service /etc/systemd/system/
 
+# Ensure there are no disruptive periodic services enabled by default in image
+systemd_banish
+
 rh_finalize
 
 echo "SUCCESS!"
diff --git a/contrib/cirrus/packer/fedora_setup.sh b/contrib/cirrus/packer/fedora_setup.sh
index eb95db907..1e25a1a3c 100644
--- a/contrib/cirrus/packer/fedora_setup.sh
+++ b/contrib/cirrus/packer/fedora_setup.sh
@@ -76,6 +76,9 @@ ooe.sh sudo dnf install -y \
     xz \
     zip
 
+# Ensure there are no disruptive periodic services enabled by default in image
+systemd_banish
+
 sudo /tmp/libpod/hack/install_catatonit.sh
 
 rh_finalize
diff --git a/contrib/cirrus/packer/ubuntu_setup.sh b/contrib/cirrus/packer/ubuntu_setup.sh
index 6209f2f89..dba191ad2 100644
--- a/contrib/cirrus/packer/ubuntu_setup.sh
+++ b/contrib/cirrus/packer/ubuntu_setup.sh
@@ -100,6 +100,9 @@ ooe.sh sudo update-grub
 sudo /tmp/libpod/hack/install_catatonit.sh
 ooe.sh sudo make -C /tmp/libpod install.libseccomp.sudo
 
+# Ensure there are no disruptive periodic services enabled by default in image
+systemd_banish
+
 ubuntu_finalize
 
 echo "SUCCESS!"