Use tmpfs for integration tests

imagebuildah/stage_executor.go

@@ -427,7 +427,13 @@ func (s *StageExecutor) performCopy(excludes []string, copies ...imagebuilder.Co
 				data = strings.TrimPrefix(data, "\n")
 				// add breakline when heredoc ends for docker compat
 				data = data + "\n"
-				tmpFile, err := os.Create(filepath.Join(parse.GetTempDir(), path.Base(filepath.ToSlash(file.Name))))
+				// Create seperate subdir for this file.
+				tmpDir, err := os.MkdirTemp(parse.GetTempDir(), "buildah-heredoc")
+				if err != nil {
+					return fmt.Errorf("unable to create tmp dir for heredoc run %q: %w", parse.GetTempDir(), err)
+				}
+				defer os.RemoveAll(tmpDir)
+				tmpFile, err := os.Create(filepath.Join(tmpDir, path.Base(filepath.ToSlash(file.Name))))
 				if err != nil {
 					return fmt.Errorf("unable to create tmp file for COPY instruction at %q: %w", parse.GetTempDir(), err)
 				}
@@ -442,7 +448,7 @@ func (s *StageExecutor) performCopy(excludes []string, copies ...imagebuilder.Co
 					tmpFile.Close()
 					return fmt.Errorf("unable to write contents of heredoc file at %q: %w", tmpFile.Name(), err)
 				}
-				copySources = append(copySources, filepath.Base(tmpFile.Name()))
+				copySources = append(copySources, filepath.Join(filepath.Base(tmpDir), filepath.Base(tmpFile.Name())))
 				tmpFile.Close()
 			}
 			contextDir = parse.GetTempDir()

tests/bud.bats

@@ -539,13 +539,14 @@ _EOF
 }
 
 @test "bud build with heredoc content" {
-  _prefetch quay.io/fedora/python-311
+  _prefetch alpine
   run_buildah build -t heredoc $WITH_POLICY_JSON -f $BUDFILES/heredoc/Containerfile .
   expect_output --substring "print first line from heredoc"
   expect_output --substring "print second line from heredoc"
   expect_output --substring "Heredoc writing first file"
   expect_output --substring "some text of first file"
-  expect_output --substring "file2 from python"
+  expect_output --substring "file passed to program"
+  expect_output --substring "and it contains multiple"
   expect_output --substring "(your index page goes here)"
   expect_output --substring "(robots content)"
   expect_output --substring "(humans content)"
@@ -560,7 +561,7 @@ _EOF
   # verify that build output contains summary of heredoc content
   expect_output --substring 'RUN <<EOF \(echo "print first line from heredoc"...)'
   expect_output --substring 'RUN <<EOF \(echo "Heredoc writing first file" >> /file1...)'
-  expect_output --substring 'RUN python3 <<EOF \(with open\("/file2", "w") as f:...)'
+  expect_output --substring 'RUN cat <<EOF \(file passed to program...)'
   expect_output --substring 'ADD <<EOF /index.html \(\(your index page goes here))'
   expect_output --substring 'COPY <<robots.txt <<humans.txt /test/ \(\(robots content)) \(\(humans content))'
 }

tests/bud/heredoc/Containerfile

@@ -1,4 +1,4 @@
-FROM quay.io/fedora/python-311
+FROM alpine
 
 USER root
 WORKDIR /
@@ -15,13 +15,12 @@ EOF
 
 RUN cat file1
 
-RUN python3 <<EOF
-with open("/file2", "w") as f:
-    print("file2 from python", file=f)
+RUN cat <<EOF
+file passed to program
+and it contains multiple
+lines
 EOF
 
-RUN cat file2
-
 ADD <<EOF /index.html
  (your index page goes here)
 EOF

tests/helpers.bash

@@ -296,6 +296,49 @@ function rm() {
     run_unshared rm "$@"
 }
 
+#################
+#  run_with_log  #  Logs command before running it
+#################
+#
+function run_with_log() {
+    local expected_rc=0
+    local retry=1
+    local cmd="$*"
+    case "$1" in
+        [0-9])           expected_rc=$1; shift;;
+        [1-9][0-9])      expected_rc=$1; shift;;
+        [12][0-9][0-9])  expected_rc=$1; shift;;
+        '?')             expected_rc=  ; shift;;  # ignore exit code
+        --retry)         retry=3;        shift;;  # retry with sleep of 1 sec
+    esac
+    while [ $retry -gt 0 ]; do
+        retry=$(( retry - 1 ))
+        echo "$_LOG_PROMPT $cmd"
+        run "$@"
+        echo "$output"
+        if [ "$status" -ne 0 ]; then
+            echo -n "[ rc=$status ";
+            if [ -n "$expected_rc" ]; then
+                if [ "$status" -eq "$expected_rc" ]; then
+                    echo -n "(expected) ";
+                else
+                    echo -n "(** EXPECTED $expected_rc **) ";
+                fi
+            fi
+            echo "]"
+        fi
+        if [ -n "$expected_rc" ]; then
+            if [ "$status" -eq "$expected_rc" ]; then
+                return
+            elif [ $retry -gt 0 ]; then
+                echo "[ RETRYING ]" >&2
+                sleep 1
+            else
+                die "exit code is $status; expected $expected_rc"
+            fi
+        fi
+    done
+}
 
 #################
 #  run_buildah  #  Invoke buildah, with timeout, using BATS 'run'

tests/mkcw.bats

@@ -22,9 +22,9 @@ function mkcw_check_image() {
 
   # Decrypt, mount, and take a look around.
   uuid=$(cryptsetup luksUUID "$mountpoint"/disk.img)
-  cryptsetup luksOpen --key-file "$TEST_SCRATCH_DIR"/key "$mountpoint"/disk.img "$uuid"
+  run_with_log cryptsetup luksOpen --key-file "$TEST_SCRATCH_DIR"/key "$mountpoint"/disk.img "$uuid"
   mkdir -p "$TEST_SCRATCH_DIR"/mount
-  mount /dev/mapper/"$uuid" "$TEST_SCRATCH_DIR"/mount
+  run_with_log mount /dev/mapper/"$uuid" "$TEST_SCRATCH_DIR"/mount
   # Should have a not-empty config file with parts of an image's config.
   test -s "$TEST_SCRATCH_DIR"/mount/.krun_config.json
   # Should have a /tmp directory, at least.
@@ -42,9 +42,15 @@ function mkcw_check_image() {
   fi
 
   # Clean up.
-  umount "$TEST_SCRATCH_DIR"/mount
-  cryptsetup luksClose "$uuid"
-  buildah umount "$ctrID"
+  run_with_log umount -f "$TEST_SCRATCH_DIR"/mount
+  # `Retry` if `luksClose` fails with defaults of `run_with_log` because
+  # when unmounting the filesystem mounted on the device /dev/mapper/"$uuid"
+  # without `retry` somehow we end up in a state where mount is still being
+  # used by the kernel because when we do `lsof /dev/mapper/"$uuid"` it
+  # shows nothing but `dmsetup info -c $uuid` shows the device is still
+  # under use. Adding `--retry` in between somehow fixes this.
+  run_with_log --retry cryptsetup luksClose "$uuid"
+  run_buildah umount "$ctrID"
 }
 
 @test "mkcw-convert" {

tests/test_runner.sh

@@ -3,9 +3,8 @@ set -e
 
 cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
 
-# Default to using /var/tmp for test space, since it's more likely to support
-# labels than /tmp, which is often on tmpfs.
-export TMPDIR=${TMPDIR:-/var/tmp}
+# Default to using /tmp for test space.
+export TMPDIR=${TMPDIR:-/tmp}
 
 function execute() {
 	>&2 echo "++ $@"