I already fixed ZEO4-wc2 installation once in 97832d95 (ZEO: Fix
ZEO4-wc2 installation). That worked but, as it turned out, not fully:
Even though correct ZEO4-wc2-repository is cloned, and correct ZEO4-wc2
develop-egg is installed, we don't tell buildout which egg-version of
ZEO to use. This leads to the situation when buildout picks up _latest_
ZEO egg, when another egg, which depends on ZEO, is installed.

For example wendelin.core/test-zodb4-wc2 was failing as

    Updating ZEO4-wc2-repository.
    Installing ZEO4-wc2.
    warning: no previously-included files matching '*.pyc' found anywhere in distribution
    Installing ZEO.
    Installing zodbtools.
    While:
      Installing zodbtools.
      Base installation request: 'zodbtools'
        Requirement of zodbtools==0.0.0.dev8: dateparser
        Requirement of zodbtools==0.0.0.dev8: six
        Requirement of zodbtools==0.0.0.dev8: pygolang>=0.0.0.dev6
        Requirement of zodbtools==0.0.0.dev8: zope.interface
        Requirement of zodbtools==0.0.0.dev8: zodburi
        Requirement of zodbtools==0.0.0.dev8: ZODB
        Requirement of dateparser: tzlocal
        Requirement of dateparser: regex!=2019.02.19
        Requirement of dateparser: pytz
        Requirement of dateparser: python-dateutil
        Requirement of pygolang>=0.0.0.dev6: Importing
        Requirement of pygolang>=0.0.0.dev6: decorator
        Requirement of pygolang>=0.0.0.dev6: six
        Requirement of pygolang>=0.0.0.dev6: gevent
        Requirement of zope.interface: setuptools
        Requirement of zodburi: ZEO
        Requirement of zodburi: ZConfig
        Requirement of zodburi: ZODB
        Requirement of ZODB: zodbpickle>=0.6.0
        Requirement of ZODB: zope.interface
        Requirement of ZODB: zc.lockfile
        Requirement of ZODB: six
        Requirement of ZODB: transaction>=1.5.0
        Requirement of ZODB: ZConfig
        Requirement of ZODB: BTrees>=4.2.0
        Requirement of ZODB: persistent>=4.2.0
        Requirement of tzlocal: pytz
        Requirement of python-dateutil: six>=1.5
        Requirement of gevent: greenlet>=0.4.17
        Requirement of gevent: setuptools
        Requirement of gevent: zope.interface
        Requirement of gevent: zope.event
        Requirement of ZEO: trollius
        Requirement of ZEO: futures
        Requirement of ZEO: zope.interface
        Requirement of ZEO: zdaemon
        Requirement of ZEO: ZConfig
        Requirement of ZEO: zc.lockfile
        Requirement of ZEO: persistent>=4.1.0
        Requirement of ZEO: transaction>=2.0.3
        Requirement of ZEO: six
        Requirement of ZEO: ZODB>=5.1.1
        Requirement of zodbpickle>=0.6.0: setuptools
        Requirement of zc.lockfile: setuptools
        Requirement of transaction>=1.5.0: zope.interface
        Requirement of BTrees>=4.2.0: zope.interface>=5.0.0
        Requirement of BTrees>=4.2.0: persistent>=4.1.0
        Requirement of persistent>=4.2.0: cffi
        Requirement of persistent>=4.2.0: zope.interface
        Requirement of zope.event: setuptools
      Getting distribution for 'trollius'.
    Error: Picked: trollius = 2.2.1

-> Fix that by specifying which egg-version ZEO4/ZEO4-wc2 should be using.

For the reference for ZODB we already do the same - specify egg-version for all
ZODB5, ZODB4-wc2 and ZODB4:

https://lab.nexedi.com/nexedi/slapos/blob/6765c349/component/ZODB/buildout.cfg#L52-72

ZEO[test] requires ZopeUndo, but we now never pin that anywhere in e.g. stack/slapos.cfg .
Previously it was working without explicit pinning because Zope2, contrary to Zope4, pins ZopeUndo to 2.12.0.

Build of test-zodb5.cfg was failing as

    Installing wendelin.core-python.
    While:
      Installing wendelin.core-python.
      Base installation request: 'wendelin.core[test]', 'pygolang[pyx.build]', 'neoppod[tests]', 'ZEO[test]'
        Requirement of ZEO[test]==5.4.0: zope.testrunner
        Requirement of ZEO[test]==5.4.0: zdaemon
        Requirement of ZEO[test]==5.4.0: msgpack<1
        Requirement of ZEO[test]==5.4.0: mock
        Requirement of ZEO[test]==5.4.0: transaction
        Requirement of ZEO[test]==5.4.0: manuel
        Requirement of ZEO[test]==5.4.0: zope.testing
        Requirement of ZEO[test]==5.4.0: ZopeUndo
        Requirement of ZEO[test]==5.4.0: ZODB>=5.5.1
        Requirement of ZEO[test]==5.4.0: ZConfig
        Requirement of ZEO[test]==5.4.0: trollius
        Requirement of ZEO[test]==5.4.0: futures
        Requirement of ZEO[test]==5.4.0: zope.interface
        Requirement of ZEO[test]==5.4.0: zdaemon
        Requirement of ZEO[test]==5.4.0: ZConfig
        Requirement of ZEO[test]==5.4.0: zc.lockfile
        Requirement of ZEO[test]==5.4.0: persistent>=4.1.0
        Requirement of ZEO[test]==5.4.0: transaction>=2.0.3
        Requirement of ZEO[test]==5.4.0: six
        Requirement of ZEO[test]==5.4.0: ZODB>=5.1.1
        Requirement of neoppod[tests]==1.12.0: neoppod[admin,client,ctl,master,storage-importer,storage-mysqldb,storage-pymysql,storage-sqlite]
        Requirement of neoppod[tests]==1.12.0: psutil>=2
        Requirement of neoppod[tests]==1.12.0: zope.testing
        Requirement of neoppod[tests]==1.12.0: coverage
        Requirement of neoppod[tests]==1.12.0: python-dateutil
        Requirement of neoppod[tests]==1.12.0: msgpack>=0.5.6
        Requirement of pygolang[pyx.build]==0.1: wheel
        Requirement of pygolang[pyx.build]==0.1: setuptools_dso>=1.7
        Requirement of pygolang[pyx.build]==0.1: setuptools
        Requirement of pygolang[pyx.build]==0.1: cython
        Requirement of pygolang[pyx.build]==0.1: Importing
        Requirement of pygolang[pyx.build]==0.1: decorator
        Requirement of pygolang[pyx.build]==0.1: six
        Requirement of pygolang[pyx.build]==0.1: gevent
        Requirement of wendelin.core[test]: ZEO
        Requirement of wendelin.core[test]: neoppod
        Requirement of wendelin.core[test]: scipy
        Requirement of wendelin.core[test]: pytest
        Requirement of wendelin.core[test]: psutil
        Requirement of wendelin.core[test]: six
        Requirement of wendelin.core[test]: pygolang>=0.1
        Requirement of wendelin.core[test]: zodbtools>=0.0.0.dev8
        Requirement of wendelin.core[test]: ZODB>=4
        Requirement of wendelin.core[test]: numpy
        Requirement of zope.testrunner: zope.interface
        Requirement of zope.testrunner: zope.exceptions
        Requirement of zope.testrunner: six
        Requirement of zope.testrunner: setuptools
        Requirement of zdaemon: setuptools
        Requirement of zdaemon: ZConfig
        Requirement of mock: funcsigs>=1
        Requirement of mock: six
        Requirement of transaction: zope.interface
        Requirement of manuel: six
        Requirement of manuel: setuptools
        Requirement of zope.testing: setuptools
      Getting distribution for 'ZopeUndo'.
    Error: Picked: ZopeUndo = 6.0

-> pin ZopeUndo to 5.0 - the last version that supports both py2 and py3.

After d8409763 (NEO: default ZODB was changed to 5) wendelin.core tests
started to fail to build because files, that the tests extend from, were
renamed on neoppod side. Example failure:

    An internal error occurred due to a bug in either zc.buildout or in a
    recipe being used:
    Traceback (most recent call last):
      File "/opt/slapos/eggs/zc.buildout-2.7.1+slapos019-py3.7.egg/zc/buildout/buildout.py", line 2359, in main
        user_defaults, command, args)
      File "/opt/slapos/eggs/zc.buildout-2.7.1+slapos019-py3.7.egg/zc/buildout/buildout.py", line 312, in __init__
        data['buildout'], override))
      File "/opt/slapos/eggs/zc.buildout-2.7.1+slapos019-py3.7.egg/zc/buildout/buildout.py", line 1974, in _open
        seen, processing))
      File "/opt/slapos/eggs/zc.buildout-2.7.1+slapos019-py3.7.egg/zc/buildout/buildout.py", line 1974, in _open
        seen, processing))
      File "/opt/slapos/eggs/zc.buildout-2.7.1+slapos019-py3.7.egg/zc/buildout/buildout.py", line 1974, in _open
        seen, processing))
      File "/opt/slapos/eggs/zc.buildout-2.7.1+slapos019-py3.7.egg/zc/buildout/buildout.py", line 1940, in _open
        with open(downloaded_filename) as fp:
    FileNotFoundError: [Errno 2] No such file or directory: '/srv/slapgrid/slappart49/srv/project/slapos/software/neoppod/software-zodb5.cfg'

-> Fix it by adjusting wendelin.core tests correspondingly.

Similarly to 339490eb (components/zodbtools: reorganize test profiles)
make each test profile to explicitly indicate which configuration it
tests against.

Drop support for testing pristine ZODB4 - now only ZODB5 and ZODB4-wc2 remain.

We can drop test coverage for ZODB4 because slapos mainline switched to
ZODB5 to be used by default in 1c51c4cd (stack/erp5: version up all zope
stack (Zope 4.8.7), and because wendelin.core 2 works only with ZODB5
and ZODB4-wc2, but not with plain ZODB4.

In Wendelin we mostly always want to run our zopes with the soft limit
set to the hard limit.

/reviewed-by @jerome, @jm, @rafael, @vpelletier
/reviewed-on nexedi/slapos!1465

---

This patch was already added in nexedi/slapos!1451, but
removed (by force push), due to issues discussed in nexedi/slapos!1451 (comment 193296).

nexedi/erp5@39369169 added the functionality to ERP5 to
set its soft limit of allowed open file descriptors to the system wide hard limit.
This parameter is useful for Wendelin based instances where the 1024
limit is easily reached.

With this patch, this parameter can also be set via SlapOS, which
simplifies usage of the Wendelin SR.

/reviewed-by @jerome, @jm, @rafael, @vpelletier
/reviewed-on nexedi/slapos!1465

---

This patch was already added in nexedi/slapos!1451, but
removed (by force push), due to issues discussed in nexedi/slapos!1451 (comment 193296).

Comments need to be at the start of the line.

The SLA unique_by_network was not requested at all when any SLA was set
in the resilience. Now we put unique_by_network for all instances
without SLA.

this is needed for slapos-node package compilation

This is a fixup of 5f6a2eb8.

util-linux needs gcc 8+ in order to avoid error:

libuuid/src/gen_uuid.c:536:33: error: initializer element is not constant

See merge request nexedi/slapos!1489

See merge request nexedi/slapos!1457

There are more recent versions, but they don't use pyproject.toml for
metadata.

Here we want a version with python3.11 support

This comes with a patch because the setup.py does not have version,
which is not supported with our old tooling.

This section is just for setup, it does not make sense to generate
scripts here and it cause errors when another section uses the same
technique.

Note that we don't use 3 yet because nexedi/pygolang@6446a0be

Webrunner was using this and it's natural for users coming from
slaprunner to find slapos wrapper in ~/bin/slapos, but where theia is
very incompatible is that ~/bin/sla[TAB] will another slapos-standalone
which will conflict with the one from theia.

Even if 'sed -i' is not posix and we should not use system sed this way:
- even busybox supports this option
- we already use it in so many other places that it does not make sense to
  to impose ourselves such extra dependency

If we plan to fix all 'sed -i', alternatives to [sed] are:
- patch
- 'perl -pi -e' (perl is already built for openssl)

And we should first have a mechanism to prevent misuse of system sed.

Going 0.139 -> 0.140 introduces the following changes:

    nexedi/slapos.toolbox@0.139...0.140

Test results: https://erp5js.nexedi.net/#/test_result_module/20231130-F8B9BE8D

erp5 and slapos-master failed but the failures seem to be unrelated and
it was already the same before on master:

https://erp5js.nexedi.net/#!display_with_history?p.view=https%3A%2F%2Ferp5js.nexedi.net%2Fhateoas%2FERP5Document_getHateoas%3Fmode%3Dtraverse%26relative_url%3Dtest_result_module%252F20231130-5E15B7D0%252F22%26view%3Dview_result_history&p.editable=true&p.selection=8c63bd5c5d74765e1a10d5276fd66ae6914e949b&p.history=235a69ba30d222bbf3194ffbae652f43f6dabe87&p.selection_index=1&p.page=form&p.jio_key=test_result_module%2F20231130-5E15B7D0%2F22&n.jio_key=test_result_module%2F20231130-5E15B7D0%2F22&n.view=https%3A%2F%2Ferp5js.nexedi.net%2Fhateoas%2FERP5Document_getHateoas%3Fmode%3Dtraverse%26relative_url%3Dtest_result_module%252F20231130-5E15B7D0%252F22%26view%3Dview_result_history

https://erp5js.nexedi.net/#!display_with_history?p.view=https%3A%2F%2Ferp5js.nexedi.net%2Fhateoas%2FERP5Document_getHateoas%3Fmode%3Dtraverse%26relative_url%3Dtest_result_module%252F20231130-5E15B7D0%252F57%26view%3Dview_result_history&p.editable=true&p.selection=8c63bd5c5d74765e1a10d5276fd66ae6914e949b&p.history=235a69ba30d222bbf3194ffbae652f43f6dabe87&p.selection_index=41&p.page=form&p.jio_key=test_result_module%2F20231130-5E15B7D0%2F57&n.jio_key=test_result_module%2F20231130-5E15B7D0%2F57&n.view=https%3A%2F%2Ferp5js.nexedi.net%2Fhateoas%2FERP5Document_getHateoas%3Fmode%3Dtraverse%26relative_url%3Dtest_result_module%252F20231130-5E15B7D0%252F57%26view%3Dview_result_history

Now that testnodes are using ipv6 range, we can safely put back this
check in place.

Werkzeug 3.0.0 is not compatible with Python3.7:

  File "/opt/slapos/eggs/werkzeug-3.0.0-py3.7.egg/werkzeug/serving.py",
line 76, in <module>
    t.Union["ssl.SSLContext", t.Tuple[str, t.Optional[str]],
t.Literal["adhoc"]]
AttributeError: module 'typing' has no attribute 'Literal

Now that testnodes are using ipv6 range, we can safely put back this
check in place.

This reverts commit 51a16b0b.

See merge request nexedi/slapos!1484

- remove no longer used ru/lopcomm/supervision.jinja2.py
- restore removed `+ keep on touching RU watchdog` comment.
  Now it relates to ru/lopcomm/stats which became responsible for this function.
- move code of RU-netconf-connection promise to be located nearby stats service
  because this promise interacts with that service, and grouping code by
  interaction makes it easier to understand for humans. Previously
  RU-netconf-connection was interacting with supervision service whcsh is gone
  after the patch in question.
- use double vertical space to delimit logical sections from each other.

open questions:

- before the patch in question stats code was reconnecting after each error
  with 10 seconds pause. Now it logs it wants to reconnect but does _not_
  because top-level `while True` was removed. Was that intended?

  If it was not the intent then new stats code will fail after any single error
  and won't reconnect to RU by itself.

/reviewed-by @lu.xu
/reviewed-on nexedi/slapos!1483