Restore without the recovery kit: the key from the location, with a passphrase
On a server without a backup key, backup:target:add finds the backups at the location and takes their key from its config with one of the old server's passphrases. Backups then wait until a new recovery kit is confirmed. The deletion delay and the repository id are now stored on the location, sealed with the key, so the delay survives a restore without a kit and --repair-config can write a lost config again from the kit. The key page warns against creating a new key when restoring a server. New test: tests/integration/recovery-scenarios.sh, and a no-kit mode in full-restore-roundtrip.sh.
This commit is contained in:
@@ -2,8 +2,10 @@
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# Disaster recovery: occ backup:key:import + backup:target:add + backup:restore:full on a
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# SECOND, fresh Nextcloud instance that never saw the first one, sharing only the backup
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# location (a local directory, bind-mounted into both containers) -- see PLAN.md 3.7.
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# Usage: full-restore-roundtrip.sh <nextcloud-image-tag> [sqlite|pgsql|mysql] [legacy|sftp|salvage|salvage-files|to-pgsql|to-mysql|to-sqlite]
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# Usage: full-restore-roundtrip.sh <nextcloud-image-tag> [sqlite|pgsql|mysql] [legacy|sftp|salvage|salvage-files|to-pgsql|to-mysql|to-sqlite|no-kit]
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# e.g. full-restore-roundtrip.sh 35-apache pgsql
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# With "no-kit" the recovery kit is gone: backup:target:add takes the key from the location with
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# the passphrase, and backups wait until a new kit is confirmed.
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# With "salvage-files" one pack is damaged and another is gone from the location. The restore must
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# stop and point at --salvage; run again as the guide says, it restores the database and every file
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# that can be read, and lists the rest (exit 2). NGB_FRT_DATA_MB sets the amount of data (default 200).
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@@ -93,7 +95,10 @@ run_on ngb-frt-origin app:enable ng_backup >/dev/null
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ok "origin instance up ($DB${LEGACY:+, NG Backup 0.9.7})"
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docker exec ngb-frt-origin sh -c "printf 'full restore roundtrip passphrase 2026\n' > /tmp/pass"
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run_on ngb-frt-origin backup:key:init --passphrase-file=/tmp/pass --label=CI >/dev/null || fail "key init"
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DELAY_OPT=()
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[ "$MODE" = no-kit ] && DELAY_OPT=(--delete-delay-days=21)
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run_on ngb-frt-origin backup:key:init --passphrase-file=/tmp/pass --label=CI "${DELAY_OPT[@]}" >/dev/null || fail "key init"
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ORIGIN_FP=$(run_on ngb-frt-origin backup:status | grep -o 'Key: [0-9a-f-]*' | cut -d' ' -f2)
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run_on ngb-frt-origin backup:key:kit --output=/tmp/kit.json >/dev/null
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CODE=$(run_on ngb-frt-origin backup:key:kit | php -r 'echo json_decode(stream_get_contents(STDIN), true)["confirmation_code"];')
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run_on ngb-frt-origin backup:key:confirm -u admin --code="$CODE" --confirm="Yes, I confirm" >/dev/null || fail "confirm"
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@@ -187,8 +192,29 @@ docker exec ngb-frt-restore chmod 644 /tmp/kit.json
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docker cp /tmp/ngb-frt-pass ngb-frt-restore:/tmp/pass
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ok "fresh restore instance up"
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run_on ngb-frt-restore backup:key:import /tmp/kit.json --passphrase-file=/tmp/pass >/dev/null || fail "key import"
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ADD_OUT=$(run_on ngb-frt-restore backup:target:add offsite "${LOCATION[@]}" --path=repo 2>&1) || { printf '%s\n' "$ADD_OUT"; fail "target add on the restore instance"; }
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if [ "$MODE" = no-kit ]; then
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# No recovery kit: backup:target:add takes the key from the location with a passphrase
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docker exec ngb-frt-restore rm -f /tmp/kit.json
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docker exec ngb-frt-restore sh -c "printf 'not the passphrase of the old server\n' > /tmp/wrongpass && chmod 644 /tmp/wrongpass"
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OUT=$(run_on ngb-frt-restore backup:target:add offsite "${LOCATION[@]}" --path=repo --passphrase-file=/tmp/wrongpass 2>&1) \
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&& { printf '%s\n' "$OUT"; fail "a wrong passphrase was accepted"; }
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printf '%s\n' "$OUT" | grep -q "Nothing was changed" || { printf '%s\n' "$OUT"; fail "a wrong passphrase did not say that nothing was changed"; }
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STATUS_OUT=$(run_on ngb-frt-restore backup:status 2>&1 || true)
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printf '%s\n' "$STATUS_OUT" | grep -q "Key: not created" || { printf '%s\n' "$STATUS_OUT"; fail "a wrong passphrase left a key behind"; }
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[ -z "$(run_on ngb-frt-restore backup:target:list 2>&1 | grep offsite)" ] || fail "a wrong passphrase left a location behind"
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OUT=$(run_on ngb-frt-restore backup:target:add other "${LOCATION[@]}" --path=nothing-here --passphrase-file=/tmp/pass 2>&1) \
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&& { printf '%s\n' "$OUT"; fail "a folder without backups was added without a key"; }
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printf '%s\n' "$OUT" | grep -q "no backups at this location" || { printf '%s\n' "$OUT"; fail "a folder without backups did not say so"; }
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ok "without a kit: a wrong passphrase and a folder without backups change nothing"
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ADD_OUT=$(run_on ngb-frt-restore backup:target:add offsite "${LOCATION[@]}" --path=repo --passphrase-file=/tmp/pass 2>&1) \
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|| { printf '%s\n' "$ADD_OUT"; fail "target add with the passphrase on the restore instance"; }
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printf '%s\n' "$ADD_OUT" | grep -q "fingerprint $ORIGIN_FP" || { printf '%s\n' "$ADD_OUT"; fail "the key from the location is not the origin's ($ORIGIN_FP)"; }
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printf '%s\n' "$ADD_OUT" | grep -q "21 days (from the location)" || { printf '%s\n' "$ADD_OUT"; fail "the deletion delay did not come from the location"; }
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ok "without a kit: the key and the deletion delay came from the location"
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else
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run_on ngb-frt-restore backup:key:import /tmp/kit.json --passphrase-file=/tmp/pass >/dev/null || fail "key import"
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ADD_OUT=$(run_on ngb-frt-restore backup:target:add offsite "${LOCATION[@]}" --path=repo 2>&1) || { printf '%s\n' "$ADD_OUT"; fail "target add on the restore instance"; }
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fi
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LIST_OUT=$(run_on ngb-frt-restore backup:list offsite 2>&1)
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printf '%s\n' "$LIST_OUT" | grep -q "$SNAP" || {
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printf 'target:add said:\n%s\nbackup:list said:\n%s\n' "$ADD_OUT" "$LIST_OUT"
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@@ -196,7 +222,8 @@ printf '%s\n' "$LIST_OUT" | grep -q "$SNAP" || {
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docker exec ngb-frt-restore sh -c 'ls -la /mnt/shared/repo /mnt/shared/repo/snapshots' || true
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fail "the origin's snapshot is not listed after connecting the location"
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}
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ok "recovery kit imported, existing repository adopted, snapshot visible"
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if [ "$MODE" = no-kit ]; then KEY_FROM="key from the location"; else KEY_FROM="recovery kit imported"; fi
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ok "$KEY_FROM, existing repository adopted, snapshot visible"
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if [ "$MODE" = salvage ]; then
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set +e
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@@ -371,6 +398,13 @@ if [ "$MODE" = sftp ]; then
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ok "over SFTP: read ahead on connections of its own ($LOGINS SFTP logins during the restore), large file identical, no spool left"
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fi
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if [ "$MODE" = no-kit ]; then
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OUT=$(run_on ngb-frt-restore backup:run offsite -l post-restore-check 2>&1) && { printf '%s\n' "$OUT"; fail "a backup ran without a confirmed recovery kit"; }
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printf '%s\n' "$OUT" | grep -q "Confirm the recovery kit" || { printf '%s\n' "$OUT"; fail "the refused backup does not point at the recovery kit"; }
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CODE=$(run_on ngb-frt-restore backup:key:kit | php -r 'echo json_decode(stream_get_contents(STDIN), true)["confirmation_code"];')
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run_on ngb-frt-restore backup:key:confirm -u admin --code="$CODE" --confirm="Yes, I confirm" >/dev/null || fail "confirm a new kit after the restore"
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ok "without a kit: backups wait for a new recovery kit to be confirmed"
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fi
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run_on ngb-frt-restore backup:run offsite -l post-restore-check >/dev/null || fail "a new backup after the restore fails"
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ok "the restored instance can run a new backup of its own"
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Executable
+203
@@ -0,0 +1,203 @@
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#!/bin/bash
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# Getting the backup key onto a new server, with and without the recovery kit, and what the
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# administrator is told in each case. Every scenario starts on a fresh Nextcloud (SQLite) with a
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# copy of the origin's location; nothing is restored (full-restore-roundtrip.sh does that).
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# Usage: recovery-scenarios.sh [nextcloud-image-tag] e.g. recovery-scenarios.sh 35-apache
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#
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# kit kit + passphrase: backup:key:import, then backup:target:add asks nothing
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# kit-wrong kit with a wrong passphrase: refused, no key left behind
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# no-kit passphrase only: target:add asks for it (or --passphrase-file), a wrong one
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# changes nothing; backups wait for a new kit
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# no-kit-old as no-kit, on a location backed up only before 1.1.0 (no settings file):
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# the deletion delay is the default, and the admin is told so
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# no-config-no-kit the location's config is gone and there is no kit: told that only the kit helps
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# no-config-kit config gone, kit there: --repair-config writes it again, the backups open
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# other-kit the kit of another server: refused, told to use the old server's kit
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# empty nothing at the location: told to check the details, not to make a new key
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set -euo pipefail
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IMAGE="nextcloud:${1:-35-apache}"
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APP=$(cd "$(dirname "$0")/../.." && pwd)
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SHARED=$(mktemp -d)
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chmod 777 "$SHARED"
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PASS='recovery scenarios passphrase 2026'
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fail() { echo "FAIL: $*"; exit 1; }
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ok() { echo "ok $*"; }
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cleanup() {
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docker rm -fv ngb-rs-origin ngb-rs-other ngb-rs-new >/dev/null 2>&1 || true
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docker run --rm -v "$SHARED:/target" alpine sh -c 'rm -rf /target/*' >/dev/null 2>&1 || true
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rmdir "$SHARED" 2>/dev/null || true
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return 0
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}
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trap cleanup EXIT
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run_on() { docker exec -u www-data "$1" php occ "${@:2}"; }
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# Output of a command that must fail; the scenario fails when it succeeds.
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must_fail() { # container what args...
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local out
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if out=$(run_on "$1" "${@:3}" 2>&1); then printf '%s\n' "$out"; fail "$2: the command succeeded"; fi
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printf '%s\n' "$out"
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}
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expect() { # output text what
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printf '%s\n' "$1" | grep -qF -- "$2" || { printf '%s\n' "$1"; fail "$3: the output does not say \"$2\""; }
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}
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not_expect() {
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printf '%s\n' "$1" | grep -qF -- "$2" && { printf '%s\n' "$1"; fail "$3: the output says \"$2\""; }
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return 0
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}
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start() { # name
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docker rm -fv "$1" >/dev/null 2>&1 || true
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docker run -d --name "$1" -e SQLITE_DATABASE=nextcloud -e NEXTCLOUD_ADMIN_USER=admin -e NEXTCLOUD_ADMIN_PASSWORD=admin \
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-v "$APP:/var/www/html/custom_apps/ng_backup:ro" -v "$SHARED:/mnt/shared" "$IMAGE" >/dev/null
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for i in $(seq 1 90); do run_on "$1" status 2>/dev/null | grep -q "installed: true" && break; sleep 3; done
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docker exec "$1" chown www-data:www-data /var/www/html/custom_apps
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run_on "$1" app:enable ng_backup >/dev/null
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docker exec "$1" sh -c "printf '%s\n' '$PASS' > /tmp/pass; printf 'not the passphrase at all\n' > /tmp/wrongpass; chmod 644 /tmp/pass /tmp/wrongpass"
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}
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key_of() { run_on "$1" backup:status 2>&1 | sed -n 's/^Key: \([0-9a-f-]*\),.*/\1/p'; }
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no_key() { # container what
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local s
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s=$(run_on "$1" backup:status 2>&1 || true)
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expect "$s" "Key: not created" "$2: a key was left behind"
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[ -z "$(run_on "$1" backup:target:list 2>&1 | grep offsite || true)" ] || fail "$2: a location was left behind"
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}
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location() { echo "local -a null::null -o datadir=/mnt/shared/$1 --path=repo"; }
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# A fresh server with its own copy of the origin's location
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scenario() { # name
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docker exec ngb-rs-origin sh -c "rm -rf /mnt/shared/$1 && mkdir -p /mnt/shared/$1 && cp -a /mnt/shared/origin/repo /mnt/shared/$1/ && chown -R www-data /mnt/shared/$1"
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start ngb-rs-new
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docker exec -i ngb-rs-new sh -c 'cat > /tmp/kit.json && chmod 644 /tmp/kit.json' < "$SHARED/kit.json"
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}
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# The origin: a key with a deletion delay of its own, a kit, one backup
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start ngb-rs-origin
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run_on ngb-rs-origin backup:key:init --passphrase-file=/tmp/pass --label=Safe --delete-delay-days=21 >/dev/null || fail "key init"
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run_on ngb-rs-origin backup:key:kit --output=/tmp/kit.json >/dev/null
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CODE=$(run_on ngb-rs-origin backup:key:kit | php -r 'echo json_decode(stream_get_contents(STDIN), true)["confirmation_code"];')
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run_on ngb-rs-origin backup:key:confirm -u admin --code="$CODE" --confirm="Yes, I confirm" >/dev/null || fail "confirm"
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docker exec ngb-rs-origin sh -c 'mkdir -p /mnt/shared/origin && chown www-data /mnt/shared/origin'
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# shellcheck disable=SC2046
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run_on ngb-rs-origin backup:target:add offsite $(location origin) >/dev/null || fail "target add on the origin"
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run_on ngb-rs-origin backup:run offsite >/dev/null || fail "backup on the origin"
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SNAP=$(run_on ngb-rs-origin backup:list offsite | grep -o '[0-9a-f]\{32\}' | head -1)
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FP=$(key_of ngb-rs-origin)
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docker exec ngb-rs-origin cat /tmp/kit.json > "$SHARED/kit.json"
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docker exec ngb-rs-origin test -f /mnt/shared/origin/repo/settings || fail "the origin's location has no settings file"
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ok "origin: key $FP, kit, snapshot $SNAP, settings on the location"
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# kit: the passphrase once, for the kit; target:add asks nothing more
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scenario kit
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OUT=$(run_on ngb-rs-new backup:key:import /tmp/kit.json --passphrase-file=/tmp/pass 2>&1) || { printf '%s\n' "$OUT"; fail "kit: key import"; }
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expect "$OUT" "fingerprint $FP" "kit"
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expect "$OUT" "21 days (from the kit)" "kit"
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expect "$OUT" "backup:target:add" "kit: the next step"
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# shellcheck disable=SC2046
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OUT=$(run_on ngb-rs-new backup:target:add offsite $(location kit) --no-interaction 2>&1) || { printf '%s\n' "$OUT"; fail "kit: target add"; }
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not_expect "$OUT" "Passphrase" "kit: target:add asked for a passphrase"
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expect "$OUT" "found and adopted" "kit"
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run_on ngb-rs-new backup:list offsite | grep -q "$SNAP" || fail "kit: the snapshot is not listed"
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run_on ngb-rs-new backup:run offsite >/dev/null || fail "kit: a backup after the kit import"
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ok "kit: imported with the passphrase, location added without asking again, backups run"
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# kit-wrong
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scenario kit-wrong
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OUT=$(must_fail ngb-rs-new "kit-wrong" backup:key:import /tmp/kit.json --passphrase-file=/tmp/wrongpass)
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expect "$OUT" "Wrong passphrase" "kit-wrong"
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no_key ngb-rs-new "kit-wrong"
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ok "kit-wrong: refused, nothing left behind"
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# no-kit
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scenario no-kit
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docker exec ngb-rs-new rm /tmp/kit.json
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# shellcheck disable=SC2046
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OUT=$(must_fail ngb-rs-new "no-kit without a passphrase" backup:target:add offsite $(location no-kit) --no-interaction)
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expect "$OUT" "this location holds backups" "no-kit: explains where the key comes from"
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expect "$OUT" "--passphrase-file" "no-kit: says how to give the passphrase"
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no_key ngb-rs-new "no-kit without a passphrase"
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# shellcheck disable=SC2046
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OUT=$(must_fail ngb-rs-new "no-kit wrong passphrase" backup:target:add offsite $(location no-kit) --passphrase-file=/tmp/wrongpass)
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expect "$OUT" "Wrong passphrase" "no-kit wrong passphrase"
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expect "$OUT" "Nothing was changed" "no-kit wrong passphrase"
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no_key ngb-rs-new "no-kit wrong passphrase"
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# shellcheck disable=SC2046
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OUT=$(run_on ngb-rs-new backup:target:add offsite $(location no-kit) --passphrase-file=/tmp/pass 2>&1) || { printf '%s\n' "$OUT"; fail "no-kit: target add"; }
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expect "$OUT" "fingerprint $FP" "no-kit"
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expect "$OUT" "21 days (from the location)" "no-kit"
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expect "$OUT" "download a new recovery kit" "no-kit: asks for a new kit"
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run_on ngb-rs-new backup:list offsite | grep -q "$SNAP" || fail "no-kit: the snapshot is not listed"
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OUT=$(must_fail ngb-rs-new "no-kit backup before a new kit" backup:run offsite)
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expect "$OUT" "Confirm the recovery kit" "no-kit: a backup before a new kit"
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CODE=$(run_on ngb-rs-new backup:key:kit | php -r 'echo json_decode(stream_get_contents(STDIN), true)["confirmation_code"];')
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run_on ngb-rs-new backup:key:confirm -u admin --code="$CODE" --confirm="Yes, I confirm" >/dev/null || fail "no-kit: confirm the new kit"
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run_on ngb-rs-new backup:run offsite >/dev/null || fail "no-kit: a backup after the new kit"
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ok "no-kit: passphrase asked, wrong one changes nothing, key and delay from the location, backups wait for a new kit"
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# no-kit-old: a location from before 1.1.0 has no settings file
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scenario no-kit-old
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docker exec ngb-rs-new rm /tmp/kit.json /mnt/shared/no-kit-old/repo/settings
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# shellcheck disable=SC2046
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OUT=$(run_on ngb-rs-new backup:target:add offsite $(location no-kit-old) --passphrase-file=/tmp/pass 2>&1) || { printf '%s\n' "$OUT"; fail "no-kit-old: target add"; }
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expect "$OUT" "fingerprint $FP" "no-kit-old"
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expect "$OUT" "7 days (the default" "no-kit-old: the default delay and why"
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docker exec ngb-rs-new test -f /mnt/shared/no-kit-old/repo/settings || fail "no-kit-old: the settings were not written when the location was added"
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ok "no-kit-old: key from the location, default delay with the reason, settings written now"
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# no-config-no-kit
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scenario no-config-no-kit
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docker exec ngb-rs-new rm /tmp/kit.json /mnt/shared/no-config-no-kit/repo/config
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# shellcheck disable=SC2046
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OUT=$(must_fail ngb-rs-new "no-config-no-kit" backup:target:add offsite $(location no-config-no-kit) --passphrase-file=/tmp/pass)
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expect "$OUT" "its config file is gone" "no-config-no-kit"
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expect "$OUT" "only the recovery kit has the key" "no-config-no-kit"
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expect "$OUT" "--repair-config" "no-config-no-kit"
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no_key ngb-rs-new "no-config-no-kit"
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docker exec ngb-rs-new test ! -f /mnt/shared/no-config-no-kit/repo/config || fail "no-config-no-kit: a config was written"
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ok "no-config-no-kit: told the kit is needed, nothing written"
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# no-config-kit
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scenario no-config-kit
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docker exec ngb-rs-new rm /mnt/shared/no-config-kit/repo/config
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run_on ngb-rs-new backup:key:import /tmp/kit.json --passphrase-file=/tmp/pass >/dev/null || fail "no-config-kit: key import"
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# shellcheck disable=SC2046
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OUT=$(must_fail ngb-rs-new "no-config-kit without --repair-config" backup:target:add offsite $(location no-config-kit))
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expect "$OUT" "--repair-config" "no-config-kit: points at --repair-config"
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docker exec ngb-rs-new test ! -f /mnt/shared/no-config-kit/repo/config || fail "no-config-kit: a config was written without --repair-config"
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# shellcheck disable=SC2046
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OUT=$(run_on ngb-rs-new backup:target:add offsite $(location no-config-kit) --repair-config 2>&1) || { printf '%s\n' "$OUT"; fail "no-config-kit: --repair-config"; }
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expect "$OUT" "written again" "no-config-kit"
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expect "$OUT" "found and adopted" "no-config-kit"
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run_on ngb-rs-new backup:list offsite | grep -q "$SNAP" || fail "no-config-kit: the snapshot is not listed after the repair"
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run_on ngb-rs-new backup:browse offsite "$SNAP" >/dev/null 2>&1 || fail "no-config-kit: the snapshot cannot be read after the repair"
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ok "no-config-kit: refused without --repair-config, config written again with it, the backups open"
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# other-kit: the kit of another server
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start ngb-rs-other
|
||||
run_on ngb-rs-other backup:key:init --passphrase-file=/tmp/pass >/dev/null || fail "other: key init"
|
||||
run_on ngb-rs-other backup:key:kit --output=/tmp/other.json >/dev/null
|
||||
docker exec ngb-rs-other cat /tmp/other.json > "$SHARED/other.json"
|
||||
docker rm -fv ngb-rs-other >/dev/null
|
||||
scenario other-kit
|
||||
docker exec ngb-rs-new rm /tmp/kit.json
|
||||
docker exec -i ngb-rs-new sh -c 'cat > /tmp/other.json && chmod 644 /tmp/other.json' < "$SHARED/other.json"
|
||||
run_on ngb-rs-new backup:key:import /tmp/other.json --passphrase-file=/tmp/pass >/dev/null || fail "other-kit: key import"
|
||||
# shellcheck disable=SC2046
|
||||
OUT=$(must_fail ngb-rs-new "other-kit" backup:target:add offsite $(location other-kit))
|
||||
expect "$OUT" "different key" "other-kit"
|
||||
expect "$OUT" "must be the old server's" "other-kit: points at the right kit"
|
||||
[ -z "$(run_on ngb-rs-new backup:target:list 2>&1 | grep offsite || true)" ] || fail "other-kit: a location was left behind"
|
||||
# shellcheck disable=SC2046
|
||||
OUT=$(must_fail ngb-rs-new "other-kit repair" backup:target:add offsite $(location other-kit) --repair-config)
|
||||
expect "$OUT" "leave out --repair-config" "other-kit: a config that is there is not repaired"
|
||||
ok "other-kit: refused, told to use the old server's kit, the config untouched"
|
||||
|
||||
# empty
|
||||
scenario empty
|
||||
docker exec ngb-rs-new sh -c 'mkdir -p /mnt/shared/nothing && chown www-data /mnt/shared/nothing'
|
||||
OUT=$(must_fail ngb-rs-new "empty" backup:target:add offsite local -a null::null -o datadir=/mnt/shared/nothing --path=repo --passphrase-file=/tmp/pass)
|
||||
expect "$OUT" "no backups at this location" "empty"
|
||||
expect "$OUT" "Check the connection details and --path" "empty"
|
||||
no_key ngb-rs-new "empty"
|
||||
ok "empty: told to check the details, no key made"
|
||||
|
||||
echo "RECOVERY SCENARIOS PASS"
|
||||
Reference in New Issue
Block a user