a18913924d
- Benchmarks overlay build in an environment with 1000 nodes - Updates testenv to support both benchmarks and tests To execute: ``` go test github.com/warewulf/warewulf/internal/app/wwctl/overlay/build -bench Benchmark_Overlay_Build ``` Signed-off-by: Jonathon Anderson <janderson@ciq.com>
668 lines
20 KiB
Go
668 lines
20 KiB
Go
package overlay
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import (
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"fmt"
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"io"
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"os"
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"path"
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"runtime"
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"sort"
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"testing"
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"github.com/stretchr/testify/assert"
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warewulfconf "github.com/warewulf/warewulf/internal/pkg/config"
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"github.com/warewulf/warewulf/internal/pkg/node"
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"github.com/warewulf/warewulf/internal/pkg/testenv"
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"github.com/warewulf/warewulf/internal/pkg/util"
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"github.com/cavaliergopher/cpio"
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)
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func Test_OverlayMethods(t *testing.T) {
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env := testenv.New(t)
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defer env.RemoveAll()
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// Setup test data
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sitedir := "/var/lib/warewulf/overlays/"
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distdir := "/usr/share/warewulf/overlays/"
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env.WriteFile(path.Join(sitedir, "siteonly/rootfs/testfile"), "a site overlay")
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env.WriteFile(path.Join(distdir, "distonly/rootfs/testfile"), "a distribution overlay")
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env.WriteFile(path.Join(sitedir, "legacy/testfile"), "a legacy overlay")
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env.WriteFile(path.Join(sitedir, "both/rootfs/testfile"), "the site version")
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env.WriteFile(path.Join(distdir, "both/rootfs/testfile"), "the distribution version")
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var tests = map[string]struct {
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name string
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path string
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rootfs string
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file string
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content string
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exists bool
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isSite bool
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isDist bool
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}{
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"site overlay": {
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name: "siteonly",
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path: path.Join(sitedir, "siteonly"),
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rootfs: path.Join(sitedir, "siteonly/rootfs"),
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file: path.Join(sitedir, "siteonly/rootfs/testfile"),
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content: "a site overlay",
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exists: true,
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isSite: true,
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isDist: false,
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},
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"distribution overlay": {
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name: "distonly",
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path: path.Join(distdir, "distonly"),
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rootfs: path.Join(distdir, "distonly/rootfs"),
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file: path.Join(distdir, "distonly/rootfs/testfile"),
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content: "a distribution overlay",
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exists: true,
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isSite: false,
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isDist: true,
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},
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"overlapping overlay": {
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name: "both",
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path: path.Join(sitedir, "both"),
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rootfs: path.Join(sitedir, "both/rootfs"),
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file: path.Join(sitedir, "both/rootfs/testfile"),
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content: "the site version",
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exists: true,
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isSite: true,
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isDist: false,
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},
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"legacy overlay": {
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name: "legacy",
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path: path.Join(sitedir, "legacy"),
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rootfs: path.Join(sitedir, "legacy"),
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file: path.Join(sitedir, "legacy/testfile"),
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content: "",
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exists: true,
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isSite: true,
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isDist: false,
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},
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"missing overlay": {
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name: "absent",
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path: path.Join(sitedir, "absent"),
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rootfs: path.Join(sitedir, "absent/rootfs"),
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file: path.Join(sitedir, "absent/rootfs/testfile"),
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content: "",
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exists: false,
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isSite: true,
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isDist: false,
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},
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}
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for name, tt := range tests {
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t.Run(name, func(t *testing.T) {
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overlay := GetOverlay(tt.name)
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assert.Equal(t, tt.name, overlay.Name())
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assert.Equal(t, env.GetPath(tt.path), overlay.Path())
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assert.Equal(t, env.GetPath(tt.rootfs), overlay.Rootfs())
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assert.Equal(t, env.GetPath(tt.file), overlay.File("testfile"))
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if tt.content != "" {
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buffer, err := os.ReadFile(overlay.File("testfile"))
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assert.NoError(t, err)
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assert.Equal(t, tt.content, string(buffer))
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}
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assert.Equal(t, tt.exists, overlay.Exists())
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assert.Equal(t, tt.isSite, overlay.IsSiteOverlay())
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assert.Equal(t, tt.isDist, overlay.IsDistributionOverlay())
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})
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}
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}
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func Test_BuildOverlayIndir(t *testing.T) {
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var tests = map[string]struct {
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node node.Node
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overlays []string
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overlayFiles map[string]string
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overlayDirs []string
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overlaySymlinks map[string]string
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outputDir string
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outputFiles map[string]string
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outputDirs []string
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outputSymlinks map[string]string
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}{
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"empty": {
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outputDir: "/image",
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},
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"empty directory": {
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overlays: []string{"o1"},
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overlayDirs: []string{"/var/lib/warewulf/overlays/o1/rootfs/testdir"},
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outputDir: "/image",
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outputDirs: []string{"testdir"},
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},
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"single flat file": {
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overlays: []string{"o1"},
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overlayFiles: map[string]string{
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"/var/lib/warewulf/overlays/o1/rootfs/testfile": "A test file from o1",
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},
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outputDir: "/image",
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outputFiles: map[string]string{
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"testfile": "A test file from o1",
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},
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},
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"multiple overlays": {
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overlays: []string{"o1", "o2"},
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overlayFiles: map[string]string{
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"/var/lib/warewulf/overlays/o1/rootfs/t1.txt": "A test file from o1",
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"/var/lib/warewulf/overlays/o2/rootfs/t2.txt": "A test file from o2",
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},
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outputDir: "/image",
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outputFiles: map[string]string{
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"t1.txt": "A test file from o1",
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"t2.txt": "A test file from o2",
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},
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},
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"template": {
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node: node.Node{Profile: node.Profile{Comment: "A node comment"}},
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overlays: []string{"o1"},
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overlayFiles: map[string]string{
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"/var/lib/warewulf/overlays/o1/rootfs/t1.txt.ww": "{{ .Comment }}",
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"/image/t1.txt": "Previous content",
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},
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outputDir: "/image",
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outputFiles: map[string]string{
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"t1.txt": "A node comment",
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"t1.txt.wwbackup": "Previous content",
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},
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},
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"multifile": {
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overlays: []string{"o1"},
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overlayFiles: map[string]string{
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"/var/lib/warewulf/overlays/o1/rootfs/file.txt.ww": `
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{{- file "t1.txt" }}
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T1
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{{ file "t2.txt" }}
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T2
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{{ file "t3.txt" }}
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T3
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`,
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},
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outputDir: "/image",
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outputFiles: map[string]string{
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"t1.txt": "T1\n",
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"t2.txt": "T2\n",
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"t3.txt": "T3\n",
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},
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},
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"symlink": {
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overlays: []string{"o1"},
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overlaySymlinks: map[string]string{
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"/var/lib/warewulf/overlays/o1/rootfs/test-link": "/test-target",
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},
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outputDir: "/image",
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outputSymlinks: map[string]string{
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"test-link": "/test-target",
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},
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},
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"symlink from template": {
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overlays: []string{"o1"},
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overlayFiles: map[string]string{
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"/var/lib/warewulf/overlays/o1/rootfs/test-link.ww": `
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{{- softlink "/test-target" }}
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`,
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},
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outputDir: "/image",
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outputSymlinks: map[string]string{
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"test-link": "/test-target",
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},
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},
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}
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for name, tt := range tests {
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t.Run(name, func(t *testing.T) {
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env := testenv.New(t)
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defer env.RemoveAll()
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for fileName, content := range tt.overlayFiles {
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env.WriteFile(fileName, content)
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}
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for _, dirName := range tt.overlayDirs {
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env.MkdirAll(dirName)
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}
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for linkName, target := range tt.overlaySymlinks {
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env.Symlink(target, linkName)
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}
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env.MkdirAll(tt.outputDir)
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assert.NoError(t, BuildOverlayIndir(tt.node, []node.Node{tt.node}, tt.overlays, env.GetPath(tt.outputDir)))
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dirFiles := tt.outputDirs
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for outputFile, _ := range tt.outputFiles {
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dirFiles = append(dirFiles, outputFile)
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}
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for outputFile, _ := range tt.outputSymlinks {
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dirFiles = append(dirFiles, outputFile)
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}
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sort.Strings(dirFiles)
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assert.Equal(t, dirFiles, env.ReadDir(tt.outputDir))
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for fileName, content := range tt.outputFiles {
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assert.Equal(t, content, env.ReadFile(path.Join(tt.outputDir, fileName)))
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}
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for _, dirName := range tt.outputDirs {
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assert.True(t, util.IsDir(env.GetPath(path.Join(tt.outputDir, dirName))), fmt.Sprintf("%s is not a directory", dirName))
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}
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for linkName, expTarget := range tt.outputSymlinks {
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target, err := os.Readlink(env.GetPath(path.Join(tt.outputDir, linkName)))
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assert.NoError(t, err)
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assert.Equal(t, expTarget, target)
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}
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})
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}
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}
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func Test_BuildOverlay(t *testing.T) {
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var tests = []struct {
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description string
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nodeName string
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context string
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overlays []string
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image string
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contents []string
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perms []int
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hasFiles bool
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}{
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{
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description: "if no node, context, or overlays are specified then no overlay image is generated",
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nodeName: "",
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context: "",
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overlays: nil,
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image: "",
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contents: nil,
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},
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{
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description: "if only node is specified then no overlay image is generated",
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nodeName: "node1",
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context: "",
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overlays: nil,
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image: "",
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contents: nil,
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},
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{
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description: "if only context is specified then context named image is generated",
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nodeName: "",
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context: "system",
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overlays: nil,
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image: "__SYSTEM__.img",
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contents: nil,
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},
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{
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description: "if an overlay is specified without a node, then the overlay is built directly in the overlay directory",
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nodeName: "",
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context: "",
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overlays: []string{"o1"},
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image: "o1.img",
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contents: []string{"o1.txt"},
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perms: []int{0644},
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},
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{
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description: "if multiple overlays are specified without a node, then the combined overlay is built directly in the overlay directory",
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nodeName: "",
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context: "",
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overlays: []string{"o1", "o2"},
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image: "o1-o2.img",
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contents: []string{"o1.txt", "o2.txt"},
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perms: []int{0644, 0644},
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},
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{
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description: "if a single node overlay is specified, then the overlay is built in a node overlay directory",
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nodeName: "node1",
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context: "",
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overlays: []string{"o1"},
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image: "node1/o1.img",
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contents: []string{"o1.txt"},
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perms: []int{0644},
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},
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{
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description: "if multiple node overlays are specified, then the combined overlay is built in a node overlay directory",
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nodeName: "node1",
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context: "",
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overlays: []string{"o1", "o2"},
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image: "node1/o1-o2.img",
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contents: []string{"o1.txt", "o2.txt"},
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perms: []int{0644, 0644},
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},
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{
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description: "if no node system overlays are specified, then context pointed overlay is generated",
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nodeName: "node1",
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context: "system",
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overlays: nil,
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image: "node1/__SYSTEM__.img",
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contents: nil,
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},
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{
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description: "if no node runtime overlays are specified, then context pointed overlay is generated",
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nodeName: "node1",
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context: "runtime",
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overlays: nil,
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image: "node1/__RUNTIME__.img",
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contents: nil,
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},
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{
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description: "if a single node system overlay is specified, then a system overlay image is generated in a node overlay directory",
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nodeName: "node1",
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context: "system",
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overlays: []string{"o1"},
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image: "node1/__SYSTEM__.img",
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contents: []string{"o1.txt"},
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perms: []int{0644},
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},
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{
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description: "if a single node runtime overlay is specified, then a runtime overlay image is generated in a node overlay directory",
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nodeName: "node1",
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context: "runtime",
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overlays: []string{"o1"},
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image: "node1/__RUNTIME__.img",
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contents: []string{"o1.txt"},
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perms: []int{0644},
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},
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{
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description: "if multiple node system overlays are specified, then a system overlay image is generated with the contents of both overlays",
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nodeName: "node1",
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context: "system",
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overlays: []string{"o1", "o2"},
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image: "node1/__SYSTEM__.img",
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contents: []string{"o1.txt", "o2.txt"},
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perms: []int{0644, 0644},
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},
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{
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description: "if multiple node runtime overlays are specified, then a runtime overlay image is generated with the contents of both overlays",
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nodeName: "node1",
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context: "runtime",
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overlays: []string{"o1", "o2"},
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image: "node1/__RUNTIME__.img",
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contents: []string{"o1.txt", "o2.txt"},
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perms: []int{0644, 0644},
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},
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{
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description: "validating altered permissions are retained",
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nodeName: "node1",
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context: "runtime",
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overlays: []string{"o3"},
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image: "node1/__RUNTIME__.img",
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contents: []string{"subdir", "subdir/o3.txt"},
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perms: []int{0700, 0600},
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},
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}
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env := testenv.New(t)
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defer env.RemoveAll()
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env.CreateFile("var/lib/warewulf/overlays/o1/rootfs/o1.txt")
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env.CreateFile("var/lib/warewulf/overlays/o2/rootfs/o2.txt")
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env.CreateFile("var/lib/warewulf/overlays/o3/rootfs/subdir/o3.txt.ww")
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env.Chmod("var/lib/warewulf/overlays/o3/rootfs/subdir", 0700)
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env.Chmod("var/lib/warewulf/overlays/o3/rootfs/subdir/o3.txt.ww", 0600)
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for _, tt := range tests {
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nodeInfo := node.NewNode(tt.nodeName)
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t.Run(tt.description, func(t *testing.T) {
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err := BuildOverlay(nodeInfo, []node.Node{nodeInfo}, tt.context, tt.overlays)
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assert.NoError(t, err)
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if tt.image != "" {
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image := env.GetPath(path.Join("srv/warewulf/overlays", tt.image))
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assert.FileExists(t, image)
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sort.Strings(tt.contents)
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headers, err := readCpio(image)
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assert.NoError(t, err)
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assert.Equal(t, len(tt.contents), len(headers))
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for i, file := range tt.contents {
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assert.Equal(t, file, headers[file].Name)
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if len(tt.perms) > i {
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assert.Equal(t, tt.perms[i], int(headers[file].Mode.Perm()))
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}
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}
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} else {
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dirName := env.GetPath(path.Join("srv/warewulf/overlays", tt.nodeName))
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isEmpty := dirIsEmpty(t, dirName)
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assert.True(t, isEmpty, "%v should be empty, but isn't", dirName)
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}
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})
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}
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}
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func Test_BuildAllOverlays(t *testing.T) {
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var tests = []struct {
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description string
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nodes []string
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systemOverlays [][]string
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runtimeOverlays [][]string
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createdOverlays []string
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}{
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{
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description: "empty input creates no overlays",
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nodes: nil,
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systemOverlays: nil,
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runtimeOverlays: nil,
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createdOverlays: nil,
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},
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{
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description: "a node with no overlays creates default system/runtime overlays",
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nodes: []string{"node1"},
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systemOverlays: [][]string{{"o1"}},
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runtimeOverlays: [][]string{{"o1"}},
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createdOverlays: []string{"node1/__SYSTEM__.img.gz", "node1/__RUNTIME__.img.gz"},
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},
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{
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description: "multiple nodes with no overlays creates default system/runtime overlays",
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nodes: []string{"node1", "node2"},
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systemOverlays: [][]string{{"o1"}, {"o2"}},
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runtimeOverlays: [][]string{{"o1"}, {"o2"}},
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createdOverlays: []string{"node1/__SYSTEM__.img.gz", "node1/__RUNTIME__.img.gz", "node2/__SYSTEM__.img.gz", "node2/__RUNTIME__.img.gz"},
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},
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{
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description: "a system overlay for a node generates a system overlay for that node",
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nodes: []string{"node1"},
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systemOverlays: [][]string{{"o1"}},
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runtimeOverlays: nil,
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createdOverlays: []string{"node1/__SYSTEM__.img.gz"},
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},
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{
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description: "two nodes with different system overlays generates a system overlay for each node",
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nodes: []string{"node1", "node2"},
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systemOverlays: [][]string{{"o1"}, {"o1", "o2"}},
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runtimeOverlays: nil,
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createdOverlays: []string{"node1/__SYSTEM__.img.gz", "node2/__SYSTEM__.img.gz"},
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},
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{
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description: "two nodes with a single runtime overlay generates a runtime overlay for the first node",
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nodes: []string{"node1"},
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systemOverlays: nil,
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runtimeOverlays: [][]string{{"o1"}},
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createdOverlays: []string{"node1/__RUNTIME__.img.gz"},
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},
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{
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description: "two nodes with different runtime overlays generates a system overlay for each node",
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nodes: []string{"node1", "node2"},
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systemOverlays: nil,
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runtimeOverlays: [][]string{{"o1"}, {"o1", "o2"}},
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createdOverlays: []string{"node1/__RUNTIME__.img.gz", "node2/__RUNTIME__.img.gz"},
|
|
},
|
|
{
|
|
description: "a node with both a runtime and system overlay generates an image for each",
|
|
nodes: []string{"node1"},
|
|
systemOverlays: [][]string{{"o1"}},
|
|
runtimeOverlays: [][]string{{"o2"}},
|
|
createdOverlays: []string{"node1/__RUNTIME__.img.gz", "node1/__SYSTEM__.img.gz"},
|
|
},
|
|
{
|
|
description: "two nodes with both runtime and system overlays generates each image for each node",
|
|
nodes: []string{"node1", "node2"},
|
|
systemOverlays: [][]string{{"o1"}, {"o1", "o2"}},
|
|
runtimeOverlays: [][]string{{"o2"}, {"o2"}},
|
|
createdOverlays: []string{"node1/__RUNTIME__.img.gz", "node1/__SYSTEM__.img.gz", "node2/__RUNTIME__.img.gz", "node2/__SYSTEM__.img.gz"},
|
|
},
|
|
}
|
|
|
|
conf := warewulfconf.Get()
|
|
overlayDir, overlayDirErr := os.MkdirTemp(os.TempDir(), "ww-test-overlay-*")
|
|
assert.NoError(t, overlayDirErr)
|
|
defer os.RemoveAll(overlayDir)
|
|
conf.Paths.WWOverlaydir = overlayDir
|
|
assert.NoError(t, os.Mkdir(path.Join(overlayDir, "o1"), 0700))
|
|
assert.NoError(t, os.Mkdir(path.Join(overlayDir, "o2"), 0700))
|
|
|
|
for _, tt := range tests {
|
|
t.Run(tt.description, func(t *testing.T) {
|
|
provisionDir, provisionDirErr := os.MkdirTemp(os.TempDir(), "ww-test-provision-*")
|
|
assert.NoError(t, provisionDirErr)
|
|
defer os.RemoveAll(provisionDir)
|
|
conf.Paths.WWProvisiondir = provisionDir
|
|
|
|
var nodes []node.Node
|
|
for i, nodeName := range tt.nodes {
|
|
nodeInfo := node.NewNode(nodeName)
|
|
if tt.systemOverlays != nil {
|
|
nodeInfo.SystemOverlay = tt.systemOverlays[i]
|
|
}
|
|
if tt.runtimeOverlays != nil {
|
|
nodeInfo.RuntimeOverlay = tt.runtimeOverlays[i]
|
|
}
|
|
nodes = append(nodes, nodeInfo)
|
|
}
|
|
err := BuildAllOverlays(nodes, nodes, runtime.NumCPU())
|
|
assert.NoError(t, err)
|
|
if tt.createdOverlays == nil {
|
|
dirName := path.Join(provisionDir, "overlays")
|
|
assert.True(t, dirIsEmpty(t, dirName), "%v should be empty, but isn't", dirName)
|
|
}
|
|
for _, overlayPath := range tt.createdOverlays {
|
|
assert.FileExists(t, path.Join(provisionDir, "overlays", overlayPath))
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func Test_BuildSpecificOverlays(t *testing.T) {
|
|
var tests = []struct {
|
|
description string
|
|
nodes []string
|
|
overlays []string
|
|
images []string
|
|
succeed bool
|
|
}{
|
|
{
|
|
description: "building no overlays for no nodes generates no error and no images",
|
|
nodes: nil,
|
|
overlays: nil,
|
|
images: nil,
|
|
succeed: true,
|
|
},
|
|
{
|
|
description: "building no overlays for a node generates no error and no images",
|
|
nodes: []string{"node1"},
|
|
overlays: nil,
|
|
images: nil,
|
|
succeed: true,
|
|
},
|
|
{
|
|
description: "building no overlays for two nodes generates no error and no images",
|
|
nodes: []string{"node1", "node2"},
|
|
overlays: nil,
|
|
images: nil,
|
|
succeed: true,
|
|
},
|
|
{
|
|
description: "building an overlay for a node generates an overlay image in that node's overlay directory",
|
|
nodes: []string{"node1"},
|
|
overlays: []string{"o1"},
|
|
images: []string{"node1/o1.img"},
|
|
succeed: true,
|
|
},
|
|
{
|
|
description: "building an overlay for two nodes generates an overlay image in each node's overlay directory",
|
|
nodes: []string{"node1", "node2"},
|
|
overlays: []string{"o1"},
|
|
images: []string{"node1/o1.img", "node2/o1.img"},
|
|
succeed: true,
|
|
},
|
|
{
|
|
description: "building multiple overlays for a node generates an overlay image for each overlay in the node's overlay directory",
|
|
nodes: []string{"node1"},
|
|
overlays: []string{"o1", "o2"},
|
|
images: []string{"node1/o1.img", "node1/o2.img"},
|
|
succeed: true,
|
|
},
|
|
{
|
|
description: "building multiple overlays for two nodes generates an overlay image for each overlay in each node's overlay directory",
|
|
nodes: []string{"node1", "node2"},
|
|
overlays: []string{"o1", "o2"},
|
|
images: []string{"node1/o1.img", "node1/o2.img", "node2/o1.img", "node2/o2.img"},
|
|
succeed: true,
|
|
},
|
|
}
|
|
|
|
conf := warewulfconf.Get()
|
|
overlayDir, overlayDirErr := os.MkdirTemp(os.TempDir(), "ww-test-overlay-*")
|
|
assert.NoError(t, overlayDirErr)
|
|
defer os.RemoveAll(overlayDir)
|
|
conf.Paths.WWOverlaydir = overlayDir
|
|
assert.NoError(t, os.Mkdir(path.Join(overlayDir, "o1"), 0700))
|
|
assert.NoError(t, os.Mkdir(path.Join(overlayDir, "o2"), 0700))
|
|
|
|
for _, tt := range tests {
|
|
t.Run(tt.description, func(t *testing.T) {
|
|
provisionDir, provisionDirErr := os.MkdirTemp(os.TempDir(), "ww-test-provision-*")
|
|
assert.NoError(t, provisionDirErr)
|
|
defer os.RemoveAll(provisionDir)
|
|
conf.Paths.WWProvisiondir = provisionDir
|
|
|
|
var nodes []node.Node
|
|
for _, nodeName := range tt.nodes {
|
|
nodeInfo := node.NewNode(nodeName)
|
|
nodes = append(nodes, nodeInfo)
|
|
}
|
|
err := BuildSpecificOverlays(nodes, nodes, tt.overlays, runtime.NumCPU())
|
|
if !tt.succeed {
|
|
assert.Error(t, err)
|
|
} else {
|
|
assert.NoError(t, err)
|
|
for _, image := range tt.images {
|
|
assert.FileExists(t, path.Join(provisionDir, "overlays", image))
|
|
}
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func dirIsEmpty(t *testing.T, name string) bool {
|
|
f, err := os.Open(name)
|
|
if err != nil {
|
|
t.Log(err)
|
|
return true
|
|
}
|
|
defer f.Close()
|
|
|
|
dirnames, err2 := f.Readdirnames(1)
|
|
if err2 == io.EOF {
|
|
t.Log(err2)
|
|
return true
|
|
}
|
|
t.Log(dirnames)
|
|
return false
|
|
}
|
|
|
|
func readCpio(name string) (headers map[string]*cpio.Header, err error) {
|
|
f, err := os.Open(name)
|
|
if err != nil {
|
|
return headers, err
|
|
}
|
|
defer f.Close()
|
|
|
|
reader := cpio.NewReader(f)
|
|
headers = make(map[string]*cpio.Header)
|
|
for {
|
|
header, err := reader.Next()
|
|
if err == io.EOF {
|
|
return headers, nil
|
|
}
|
|
if err != nil {
|
|
return headers, err
|
|
}
|
|
headers[header.Name] = header
|
|
}
|
|
}
|