stack/erp5: fix ZEO repozo backups not produced on python3

Products.TIDStorage was not ported to python3 and is not installed on
software-py3.cfg but the backup crontab expects tidstorage to be
present - as a result, it was silently failing to produce backups.

This brings minimal support to repozo backups on python3, without
Products.TIDStorage interraction and also extends software release test
to have a simple test checking that backups are produced and can be
restored.

software/erp5/test/setup.py

@@ -51,6 +51,8 @@ setup(name=name,
         'cryptography',
         'pexpect',
         'pyOpenSSL',
+        'ZEO',
+        'zodburi',
       ],
       test_suite='test',
     )

software/erp5/test/test/test_zodb_zeo.py

+import contextlib
+import subprocess
+import json
+
+import zodburi
+from ZODB.DB import DB
+from slapos.testing.utils import CrontabMixin
+
+
+from . import ERP5InstanceTestCase, default, matrix, setUpModule, ERP5PY3
+
+_ = setUpModule
+
+
+class ZEOTestCase(ERP5InstanceTestCase):
+  __test_matrix__ = matrix((default,))
+
+  @classmethod
+  def getInstanceSoftwareType(cls) -> str:
+    return "zodb-zeo"
+
+  @classmethod
+  def _getInstanceParameterDict(cls) -> dict:
+    return {
+      "tcpv4-port": 8000,
+      "computer-memory-percent-threshold": 100,
+      "name": cls.__name__,
+      "monitor-passwd": "secret",
+      "zodb-dict": {"root": {}},
+    }
+
+  @classmethod
+  def getInstanceParameterDict(cls) -> dict:
+    return {"_": json.dumps(cls._getInstanceParameterDict())}
+
+  def setUp(self) -> None:
+    self.storage_dict = json.loads(
+      self.computer_partition.getConnectionParameterDict()["_"]
+    )["storage-dict"]
+
+  def db(self) -> contextlib.AbstractContextManager[DB]:
+    root = self.storage_dict["root"]
+    zeo_uri = f"zeo://{root['server']}?storage={root['storage']}"
+    storage_factory, dbkw = zodburi.resolve_uri(zeo_uri)
+    return contextlib.closing(DB(storage_factory(), **dbkw))
+
+
+class TestRepozo(ZEOTestCase, CrontabMixin):
+  __partition_reference__ = "rpz"
+
+  def test_backup_and_restore(self) -> None:
+    def check_state():
+      (self.computer_partition_root_path / ".timestamp").unlink()
+      self.waitForInstance()
+      if ERP5PY3:
+        with self.db() as db:
+          with db.transaction() as cnx:
+            self.assertEqual(cnx.root.state, "before backup")
+
+    if ERP5PY3:
+      # as it is not possible to connect to a python2 ZEO server
+      # from a python3 client, we check more when the server is python3
+      with self.db() as db:
+        with db.transaction() as cnx:
+          cnx.root.state = "before backup"
+
+    check_state()
+    self._executeCrontabAtDate("tidstorage", "2000-01-01 UTC")
+    dat, fsz, index = sorted(
+      [
+        p.name
+        for p in (
+          self.computer_partition_root_path / "srv" / "backup" / "zodb" / "root"
+        ).glob("*")
+      ]
+    )
+    self.assertRegex(dat, r'2000-01-01-00-\d\d-\d\d.dat')
+    self.assertRegex(fsz, r'2000-01-01-00-\d\d-\d\d.fsz')
+    self.assertRegex(index, r'2000-01-01-00-\d\d-\d\d.index')
+
+    if ERP5PY3:
+      with self.db() as db:
+        with db.transaction() as cnx:
+          cnx.root.state = "after backup"
+      db.close()
+
+    restore_script = self.computer_partition_root_path / "srv" / "runner-import-restore"
+    self.assertTrue(restore_script.exists())
+    status, restore_output = subprocess.getstatusoutput(str(restore_script))
+    self.assertEqual(status, 1)
+    self.assertIn("Zeo is already running", restore_output)
+
+    with self.slap.instance_supervisor_rpc as supervisor:
+      supervisor.stopAllProcesses()
+    restore_output = subprocess.check_output(restore_script)
+    check_state()

software/slapos-sr-testing/software.cfg

@@ -14,6 +14,7 @@ extends =
   ../../component/python-pynacl/buildout.cfg
   ../../component/python-backports-lzma/buildout.cfg
   ../../component/selenium/buildout.cfg
+  ../../component/ZODB/buildout.cfg
 
   ../../stack/slapos.cfg
   ../../stack/nxdtest.cfg
@@ -356,6 +357,7 @@ setup = ${recurls-repository:location}
 
 [python-interpreter]
 eggs +=
+  ${BTrees:egg}
   ${lxml-python:egg}
   ${python-PyYAML:egg}
   ${slapos.core-setup:egg}
@@ -365,6 +367,7 @@ eggs +=
   beautifulsoup4
   caucase
   erp5.util
+  ${persistent:egg}
   ${python-pynacl:egg}
   ${python-cryptography:egg}
   ${python-mysqlclient:egg}
@@ -526,15 +529,23 @@ recurls =
 slapos.core =
 
 # Various needed versions
-Pillow = 10.2.0+SlapOSPatched001
+BTrees = 6.1
 forcediphttpsadapter = 1.0.1
 image = 1.5.25
+mysqlclient = 2.1.1
+paho-mqtt = 1.5.0
+pcpp = 1.30
+persistent = 6.1
+Pillow = 10.2.0+SlapOSPatched001
 plantuml = 0.3.0:whl
 pypdf = 3.6.0:whl
 pysftp = 0.2.9
 requests-toolbelt = 0.8.0
 testfixtures = 6.11.0
-mysqlclient = 2.1.1
-paho-mqtt = 1.5.0
-pcpp = 1.30
+transaction = 5.0
 xmltodict = 0.13.0
+ZEO = 6.0.0
+ZODB = 6.0.0
+zodbpickle = 4.1.1
+zope.deferredimport = 5.0
+zope.proxy = 6.1

stack/erp5/buildout.hash.cfg

@@ -78,7 +78,7 @@ md5sum = 1333d2fc21f64da4010a4eafea59d141
 
 [template-zeo]
 filename = instance-zeo.cfg.in
-md5sum = 218ffa7beb27693670664f64b993ed44
+md5sum = 33075c3ab06613874b928d90e0c0006a
 
 [template-zeo-conf]
 filename = zeo.conf.in

stack/erp5/instance-zeo.cfg.in

@@ -80,6 +80,44 @@ config-port = {{ "${" ~ zeo_section_name ~ ":port}" }}
 {%   set tidstorage_repozo_path = '' -%}
 {% else -%}
 
+[repozo-backup-script]
+repozo-wrapper = ${buildout:bin-directory}/tidstorage-repozo
+
+# BBB on python3 we don't use Products.TIDStorage but repozo directly.
+[repozo-backup-script:python3]
+recipe = slapos.recipe.template
+inline =
+  #!/bin/sh
+  zodb_directory="${directory:zodb}"
+  zodb_backup_directory="{{ default_backup_path }}"
+  repozo="${tidstorage:repozo-binary}"
+  EXIT_CODE=0
+
+  {% for family, zodb in six.iteritems(zodb_dict) -%}
+  {%   for name, zodb in zodb -%}
+  storage_name="{{ name }}"
+  zodb_path="$storage_name.fs"
+  [ ! -d "$zodb_backup_directory/$storage_name" ]] && mkdir "$zodb_backup_directory/$storage_name"
+  echo "Backing up $storage_name ..."
+  $repozo \
+    --backup \
+    --gzip \
+    --quick \
+    --repository="$zodb_backup_directory/$storage_name" \
+    --file="$zodb_directory/$zodb_path"
+
+  CURRENT_EXIT_CODE=$?
+  if [ ! "$CURRENT_EXIT_CODE"="0" ]; then
+    EXIT_CODE="$CURRENT_EXIT_CODE"
+    echo "$storage_name Backup restoration failed."
+  fi
+  {%   endfor -%}
+  {% endfor -%}
+  exit $EXIT_CODE
+repozo-wrapper = ${:output}
+mode = 755
+output = ${buildout:bin-directory}/repozo-backup
+
 [tidstorage]
 recipe = slapos.cookbook:tidstorage
 known-tid-storage-identifier-dict = {{ dumps(known_tid_storage_identifier_dict) }}
@@ -116,7 +154,7 @@ recipe = slapos.cookbook:cron.d
 cron-entries = ${cron:cron-entries}
 name = tidstorage
 time = {{ dumps(backup_periodicity) }}
-command = ${tidstorage:repozo-wrapper}
+command = ${repozo-backup-script:repozo-wrapper}
 
 # Used for ERP5 resiliency or (more probably)
 # webrunner resiliency with erp5 inside.