513 lines
16 KiB
Go
513 lines
16 KiB
Go
package dbbackup
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import (
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"archive/tar"
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"os"
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"path/filepath"
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"slices"
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"strings"
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"testing"
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"time"
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)
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// The PostgreSQL client tools are faked with shell scripts over a one-file
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// "database" ($FAKE_DIR/db). The fake psql only writes the replayed rows back
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// when its input ends in COMMIT, which is how a real server treats an open
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// transaction at disconnect, so rollback-on-failure is observable.
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const fakePGDump = `#!/bin/sh
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D="$FAKE_DIR"
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if [ "$1" = "--version" ]; then echo "pg_dump (PostgreSQL) 13.23"; exit 0; fi
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printf '%s\n' "$*" > "$D/pg_dump.args"
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printf '%s' "$PGPASSWORD" > "$D/pg_dump.password"
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[ -f "$D/dump_fail" ] && { echo "pg_dump: error: connection refused" >&2; exit 1; }
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[ -f "$D/dump_denied" ] && { printf 'pg_dump: error: query failed: ERROR: permission denied for table servers_preserve\npg_dump: error: query was: LOCK TABLE public.servers_preserve IN ACCESS SHARE MODE\n' >&2; exit 1; }
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for a in "$@"; do case "$a" in --file=*) out="${a#--file=}";; esac; done
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if [ -f "$D/dump_garbage" ]; then echo garbage > "$out"; exit 0; fi
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{ printf 'PGDMP\n'; cat "$D/db"; } > "$out"
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`
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const fakePGRestore = `#!/bin/sh
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D="$FAKE_DIR"
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list=0
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for a in "$@"; do case "$a" in --list) list=1;; esac; last="$a"; done
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head -n 1 "$last" | grep -q '^PGDMP$' || { echo "pg_restore: error: input file does not appear to be a valid archive" >&2; exit 1; }
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[ $list = 1 ] && { echo "; Archive created"; exit 0; }
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echo "-- restore script"
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tail -n +2 "$last" | sed 's/^/DATA /'
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[ -f "$D/restore_fail" ] && { echo "pg_restore: error: could not read input" >&2; exit 1; }
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exit 0
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`
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const fakePSQL = `#!/bin/sh
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D="$FAKE_DIR"
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printf '%s\n' "$@" > "$D/psql.args"
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q=""
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while [ $# -gt 0 ]; do case "$1" in -c) q="$2"; shift;; esac; shift; done
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if [ -n "$q" ]; then
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case "$q" in
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*schema_migrations*) echo 21;;
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*pg_stat_activity*) cat "$D/clients" 2>/dev/null || echo 0;;
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esac
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exit 0
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fi
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cat > "$D/psql.in"
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# The freshness record is its own psql call; keep it apart from the replay.
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if grep -q platform_settings "$D/psql.in"; then
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mv "$D/psql.in" "$D/record.stdin"; cp "$D/psql.args" "$D/record.args"; exit 0
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fi
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mv "$D/psql.in" "$D/psql.stdin"
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[ -f "$D/psql_fail" ] && { echo 'ERROR: relation "x" already exists' >&2; exit 3; }
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tail -n 1 "$D/psql.stdin" | grep -q '^COMMIT;$' || exit 0
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grep '^DATA ' "$D/psql.stdin" | sed 's/^DATA //' > "$D/db"
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`
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const testURL = "postgres://felis:[email protected]:5432/felis?sslmode=disable"
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type fakePG struct {
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dir string
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tools Tools
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}
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func newFakePG(t *testing.T, db string) *fakePG {
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t.Helper()
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dir := t.TempDir()
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write := func(name, body string) string {
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p := filepath.Join(dir, name)
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if err := os.WriteFile(p, []byte(body), 0o755); err != nil {
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t.Fatal(err)
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}
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return p
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}
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f := &fakePG{dir: dir, tools: Tools{
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PGDump: write("pg_dump", fakePGDump), PGRestore: write("pg_restore", fakePGRestore), PSQL: write("psql", fakePSQL),
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}}
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f.setDB(t, db)
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t.Setenv("FAKE_DIR", dir)
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return f
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}
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func (f *fakePG) setDB(t *testing.T, s string) {
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t.Helper()
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if err := os.WriteFile(filepath.Join(f.dir, "db"), []byte(s), 0o600); err != nil {
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t.Fatal(err)
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}
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}
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func (f *fakePG) db(t *testing.T) string {
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t.Helper()
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b, err := os.ReadFile(filepath.Join(f.dir, "db"))
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if err != nil {
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t.Fatal(err)
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}
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return string(b)
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}
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func (f *fakePG) flag(t *testing.T, name, content string) {
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t.Helper()
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if err := os.WriteFile(filepath.Join(f.dir, name), []byte(content), 0o600); err != nil {
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t.Fatal(err)
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}
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}
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func stateDir(t *testing.T) string {
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t.Helper()
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d := t.TempDir()
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for name, body := range map[string]string{
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"secrets.env": "DB_PASSWORD=s3cret-pw\n",
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"felis.host.toml": "[database]\n",
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"bootstrap.done": "2026-09-24T00:00:00Z\n",
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} {
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if err := os.WriteFile(filepath.Join(d, name), []byte(body), 0o600); err != nil {
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t.Fatal(err)
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}
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}
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if err := os.Symlink(filepath.Join(d, "felis.host.toml"), filepath.Join(d, "felis.toml")); err != nil {
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t.Fatal(err)
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}
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return d
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}
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var t0 = time.Date(2026, 9, 24, 3, 30, 0, 0, time.UTC)
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// recorded is the Status of the last freshness record, or the zero Status.
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func (pg *fakePG) recorded(t *testing.T) Status {
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t.Helper()
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args, _ := os.ReadFile(filepath.Join(pg.dir, "record.args"))
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var st Status
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for _, a := range strings.Split(string(args), "\n") {
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if v, ok := strings.CutPrefix(a, "v="); ok {
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if err := json.Unmarshal([]byte(v), &st); err != nil {
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t.Fatal(err)
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}
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}
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}
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return st
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}
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func at(t time.Time) func() time.Time { return func() time.Time { return t } }
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func TestBackupWritesAVerifiableBundle(t *testing.T) {
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pg := newFakePG(t, "users: alice\n")
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dir := filepath.Join(t.TempDir(), "db-backups")
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state := stateDir(t)
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path, err := Backup(context.Background(), BackupOptions{
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DatabaseURL: testURL, Dir: dir, Label: LabelDaily, StateDir: state, Version: "v1.2.3",
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Tools: pg.tools, Now: at(t0),
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ExportServers: func(context.Context) ([]byte, error) { return []byte(`{"kind":"List","items":[]}`), nil },
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})
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if err != nil {
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t.Fatalf("Backup: %v", err)
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}
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if want := filepath.Join(dir, "felis-db-20260924T033000Z-daily.tar"); path != want {
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t.Fatalf("path = %s, want %s", path, want)
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}
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for p, mode := range map[string]os.FileMode{dir: 0o700, path: 0o600, path + ".sha256": 0o600} {
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info, err := os.Stat(p)
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if err != nil {
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t.Fatal(err)
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}
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if info.Mode().Perm() != mode {
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t.Errorf("%s mode = %v, want %v", p, info.Mode().Perm(), mode)
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}
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}
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// The password reaches pg_dump through the environment, never argv.
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args, _ := os.ReadFile(filepath.Join(pg.dir, "pg_dump.args"))
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if strings.Contains(string(args), "s3cret-pw") {
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t.Errorf("password on the pg_dump command line: %s", args)
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}
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if pw, _ := os.ReadFile(filepath.Join(pg.dir, "pg_dump.password")); string(pw) != "s3cret-pw" {
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t.Errorf("PGPASSWORD = %q", pw)
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}
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m, err := Verify(path)
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if err != nil {
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t.Fatalf("Verify: %v", err)
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}
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if m.Label != LabelDaily || m.FelisVersion != "v1.2.3" || m.SchemaVersion != 21 || !m.CreatedAt.Equal(t0) {
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t.Errorf("manifest = %+v", m)
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}
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if m.Database != (DatabaseInfo{Host: "127.0.0.1", Port: "5432", Name: "felis", User: "felis"}) {
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t.Errorf("database = %+v", m.Database)
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}
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if !strings.Contains(m.PGDumpVersion, "13.23") {
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t.Errorf("pg_dump version = %q", m.PGDumpVersion)
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}
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var names []string
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for _, f := range m.Files {
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names = append(names, f.Name)
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}
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abs, _ := filepath.Abs(state)
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prefix := "state" + filepath.ToSlash(abs) + "/"
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want := []string{"db.dump", prefix + "felis.host.toml", prefix + "felis.toml", prefix + "secrets.env", "k8s/minecraftservers.json"}
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if !slices.Equal(names, want) {
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t.Errorf("members = %v, want %v (bootstrap.done left out)", names, want)
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}
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for _, f := range m.Files {
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if f.Name == prefix+"felis.toml" && f.Link != filepath.Join(state, "felis.host.toml") {
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t.Errorf("symlink recorded as %+v", f)
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}
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}
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// No scratch or partial files survive a successful run.
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entries, _ := os.ReadDir(dir)
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for _, e := range entries {
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if strings.HasSuffix(e.Name(), ".partial") || strings.HasSuffix(e.Name(), ".dump") {
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t.Errorf("leftover %s", e.Name())
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}
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}
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}
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func TestBackupRecordsFreshness(t *testing.T) {
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pg := newFakePG(t, "x\n")
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dir := t.TempDir()
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metrics := filepath.Join(t.TempDir(), "textfile", "felis_db_backup.prom")
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path, err := Backup(context.Background(), BackupOptions{
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DatabaseURL: testURL, Dir: dir, Label: LabelDaily, Version: "v9", Tools: pg.tools, Now: at(t0),
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Record: true, MetricsFile: metrics,
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})
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if err != nil {
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t.Fatal(err)
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}
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stdin, _ := os.ReadFile(filepath.Join(pg.dir, "record.stdin"))
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if !strings.Contains(string(stdin), "INSERT INTO platform_settings") || !strings.Contains(string(stdin), ":'v'::jsonb") {
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t.Fatalf("record SQL = %q", stdin)
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}
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st := pg.recorded(t)
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info, _ := os.Stat(path)
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if st.Name != filepath.Base(path) || st.Label != LabelDaily || !st.At.Equal(t0) || st.SizeBytes != info.Size() || st.SchemaVersion != 21 {
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t.Fatalf("recorded %+v", st)
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}
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prom, err := os.ReadFile(metrics)
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if err != nil {
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t.Fatal(err)
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}
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want := fmt.Sprintf("felis_db_backup_last_success_timestamp_seconds{label=\"daily\"} %d\n", t0.Unix())
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if !strings.Contains(string(prom), want) {
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t.Fatalf("metrics = %s, want %s", prom, want)
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}
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if fi, _ := os.Stat(metrics); fi.Mode().Perm() != 0o644 {
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t.Errorf("metrics mode %v", fi.Mode().Perm())
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}
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}
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func TestBackupRecordsAClusterThatDidNotAnswer(t *testing.T) {
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pg := newFakePG(t, "x\n")
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dir := t.TempDir()
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path, err := Backup(context.Background(), BackupOptions{
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DatabaseURL: testURL, Dir: dir, Label: LabelDaily, Tools: pg.tools, Now: at(t0),
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ExportServers: func(context.Context) ([]byte, error) { return nil, errors.New("connection refused") },
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})
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if err != nil {
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t.Fatalf("a cluster outage must not fail the database backup: %v", err)
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}
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m, err := Verify(path)
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if err != nil {
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t.Fatal(err)
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}
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if m.ServersError != "connection refused" || len(m.Files) != 1 {
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t.Errorf("manifest = %+v", m)
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}
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}
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func TestBackupsWithinOneSecondGetDistinctNames(t *testing.T) {
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pg := newFakePG(t, "x\n")
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dir := t.TempDir()
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o := BackupOptions{DatabaseURL: testURL, Dir: dir, Label: LabelPreRestore, Tools: pg.tools, Now: at(t0)}
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first, err := Backup(context.Background(), o)
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if err != nil {
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t.Fatal(err)
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}
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second, err := Backup(context.Background(), o)
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if err != nil {
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t.Fatalf("second backup in the same second: %v", err)
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}
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if first == second {
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t.Fatalf("both backups wrote %s", first)
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}
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all, err := List(dir)
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if err != nil || len(all) != 2 || !all[0].Created.After(all[1].Created) {
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t.Fatalf("list = %+v, %v", all, err)
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}
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if _, err := Verify(second); err != nil {
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t.Fatal(err)
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}
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}
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func TestBackupFailures(t *testing.T) {
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for _, tc := range []struct {
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flag, want string
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}{
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{"dump_fail", "connection refused"},
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{"dump_garbage", "does not read back"},
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// An object another role created in the database: the error names the fix.
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{"dump_denied", "sudo -u postgres psql -d felis -c 'ALTER TABLE servers_preserve OWNER TO felis'"},
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} {
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t.Run(tc.flag, func(t *testing.T) {
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pg := newFakePG(t, "x\n")
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pg.flag(t, tc.flag, "")
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dir := t.TempDir()
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_, err := Backup(context.Background(), BackupOptions{DatabaseURL: testURL, Dir: dir, Label: LabelDaily, Tools: pg.tools, Now: at(t0)})
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if err == nil || !strings.Contains(err.Error(), tc.want) {
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t.Fatalf("err = %v, want %q", err, tc.want)
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}
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entries, _ := os.ReadDir(dir)
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for _, e := range entries {
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if e.Name() != ".lock" {
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t.Errorf("a failed backup left %s behind", e.Name())
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}
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}
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})
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}
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t.Run("bad label and url", func(t *testing.T) {
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pg := newFakePG(t, "x\n")
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if _, err := Backup(context.Background(), BackupOptions{DatabaseURL: testURL, Dir: t.TempDir(), Label: "../x", Tools: pg.tools}); err == nil {
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t.Error("label with a path separator accepted")
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}
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if _, err := Backup(context.Background(), BackupOptions{DatabaseURL: "host=x dbname=y", Dir: t.TempDir(), Label: "daily", Tools: pg.tools}); err == nil {
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t.Error("non-URL database accepted")
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}
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})
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t.Run("stale partials from a crashed run are cleared", func(t *testing.T) {
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pg := newFakePG(t, "x\n")
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dir := t.TempDir()
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stale := filepath.Join(dir, ".felis-db-20260101T000000Z-daily.tar.partial")
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if err := os.WriteFile(stale, []byte("half"), 0o600); err != nil {
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t.Fatal(err)
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}
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if _, err := Backup(context.Background(), BackupOptions{DatabaseURL: testURL, Dir: dir, Label: LabelDaily, Tools: pg.tools, Now: at(t0)}); err != nil {
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t.Fatal(err)
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}
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if _, err := os.Stat(stale); !errors.Is(err, os.ErrNotExist) {
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t.Error("stale partial survived")
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}
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})
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}
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func TestVerifyCatchesCorruption(t *testing.T) {
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pg := newFakePG(t, strings.Repeat("row\n", 64))
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dir := t.TempDir()
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path, err := Backup(context.Background(), BackupOptions{DatabaseURL: testURL, Dir: dir, Label: LabelManual, Tools: pg.tools, Now: at(t0)})
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if err != nil {
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t.Fatal(err)
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}
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raw, _ := os.ReadFile(path)
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i := strings.Index(string(raw), "PGDMP")
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raw[i+10] ^= 0x20
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if err := os.WriteFile(path, raw, 0o600); err != nil {
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t.Fatal(err)
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}
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if _, err := Verify(path); err == nil || !strings.Contains(err.Error(), "corrupt") {
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t.Fatalf("flipped dump byte: err = %v, want member corrupt", err)
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}
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// A bundle intact inside but not the one the sidecar vouches for.
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raw[i+10] ^= 0x20
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raw = append(raw, make([]byte, 512)...)
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if err := os.WriteFile(path, raw, 0o600); err != nil {
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t.Fatal(err)
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}
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if _, err := Verify(path); err == nil || !strings.Contains(err.Error(), ".sha256") {
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t.Fatalf("sidecar mismatch: err = %v", err)
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}
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junk := filepath.Join(dir, "junk.tar")
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if err := os.WriteFile(junk, []byte("not a tar"), 0o600); err != nil {
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t.Fatal(err)
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}
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if _, err := Verify(junk); err == nil {
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t.Fatal("junk verified")
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}
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}
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func TestVerifyRejectsUnlistedMember(t *testing.T) {
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pg := newFakePG(t, "x\n")
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dir := t.TempDir()
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path, err := Backup(context.Background(), BackupOptions{DatabaseURL: testURL, Dir: dir, Label: LabelManual, Tools: pg.tools, Now: at(t0)})
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if err != nil {
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t.Fatal(err)
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}
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// Re-pack with an extra member the manifest does not list.
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src, _ := os.Open(path)
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defer src.Close()
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out := filepath.Join(dir, "felis-db-20260924T040000Z-manual.tar")
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dst, _ := os.Create(out)
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tr, tw := tar.NewReader(src), tar.NewWriter(dst)
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for {
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h, err := tr.Next()
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if err == io.EOF {
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break
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}
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if err != nil {
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t.Fatal(err)
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}
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_ = tw.WriteHeader(h)
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_, _ = io.Copy(tw, tr)
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}
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_ = tw.WriteHeader(&tar.Header{Name: "state/etc/cron.d/evil", Mode: 0o644, Size: 1, Typeflag: tar.TypeReg})
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_, _ = tw.Write([]byte("x"))
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_ = tw.Close()
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_ = dst.Close()
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if _, err := Verify(out); err == nil || !strings.Contains(err.Error(), "not in the manifest") {
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t.Fatalf("err = %v", err)
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}
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}
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func TestListPruneCheck(t *testing.T) {
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pg := newFakePG(t, "x\n")
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dir := t.TempDir()
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backup := func(label string, when time.Time, keep int) {
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t.Helper()
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if _, err := Backup(context.Background(), BackupOptions{DatabaseURL: testURL, Dir: dir, Label: label, Keep: keep, Tools: pg.tools, Now: at(when)}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
backup(LabelManual, t0.Add(-100*time.Hour), 0)
|
|
for i := range 5 {
|
|
backup(LabelDaily, t0.Add(time.Duration(i-5)*24*time.Hour), 3)
|
|
}
|
|
backup(LabelPreMigrate, t0.Add(-time.Hour), 3)
|
|
|
|
all, err := List(dir)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
var got []string
|
|
for _, b := range all {
|
|
got = append(got, b.Label+"@"+b.Created.Format("0102T15"))
|
|
}
|
|
want := []string{"pre-migrate@0924T02", "daily@0923T03", "daily@0922T03", "daily@0921T03", "manual@0919T23"}
|
|
if !slices.Equal(got, want) {
|
|
t.Fatalf("List = %v, want %v (dailies pruned to 3, others untouched)", got, want)
|
|
}
|
|
if _, err := os.Stat(filepath.Join(dir, BundleName(t0.Add(-5*24*time.Hour), LabelDaily)+".sha256")); !errors.Is(err, os.ErrNotExist) {
|
|
t.Error("a pruned bundle's sidecar survived")
|
|
}
|
|
|
|
if b, err := Check(dir, 26*time.Hour, t0); err != nil || b.Label != LabelPreMigrate {
|
|
t.Errorf("Check fresh = %v, %v", b, err)
|
|
}
|
|
if _, err := Check(dir, 26*time.Hour, t0.Add(30*time.Hour)); err == nil {
|
|
t.Error("Check accepted a 31h-old newest bundle")
|
|
}
|
|
if _, err := Check(filepath.Join(dir, "none"), time.Hour, t0); err == nil {
|
|
t.Error("Check accepted an empty directory")
|
|
}
|
|
}
|
|
|
|
func TestParseBundleName(t *testing.T) {
|
|
for name, ok := range map[string]bool{
|
|
"felis-db-20260924T033000Z-daily.tar": true,
|
|
"felis-db-20260924T033000Z-pre-migrate.tar": true,
|
|
"felis-db-20260924T033000Z-.tar": false,
|
|
"felis-db-20260924T033000Z-Daily.tar": false,
|
|
"felis-db-2026-daily.tar": false,
|
|
"felis-db-20260924T033000Z-daily.tar.sha256": false,
|
|
"other.tar": false,
|
|
} {
|
|
if _, _, got := parseBundleName(name); got != ok {
|
|
t.Errorf("parseBundleName(%q) ok = %v, want %v", name, got, ok)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestParseConnStripsPassword(t *testing.T) {
|
|
c, err := parseConn(testURL)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if strings.Contains(c.uri, "s3cret") || c.password != "s3cret-pw" {
|
|
t.Fatalf("conn = %+v", c)
|
|
}
|
|
if !strings.Contains(c.uri, "sslmode=disable") || !strings.HasPrefix(c.uri, "postgres://[email protected]:5432/felis") {
|
|
t.Fatalf("uri = %s", c.uri)
|
|
}
|
|
if _, err := parseConn("postgres://127.0.0.1/"); err == nil {
|
|
t.Fatal("URL without a database accepted")
|
|
}
|
|
}
|
|
|
|
func TestAge(t *testing.T) {
|
|
for d, want := range map[time.Duration]string{
|
|
-time.Second: "0s",
|
|
44 * time.Second: "44s",
|
|
90 * time.Second: "1m",
|
|
26*time.Hour + 5*time.Minute: "26h5m",
|
|
3*24*time.Hour + 4*time.Hour: "3d4h",
|
|
2*time.Hour + 30*time.Second: "2h0m",
|
|
} {
|
|
if got := Age(d); got != want {
|
|
t.Errorf("Age(%s) = %q, want %q", d, got, want)
|
|
}
|
|
}
|
|
}
|