devpi-dev September 2019

devpi-dev@python.org

3 participants
4 discussions

by Florian Schulze

Hi! I uploaded development releases for testing: https://m.devpi.net/fschulze/dev/devpi-web/4.0.0.dev1 https://m.devpi.net/fschulze/dev/devpi-server/5.2.0.dev0 These releases are drop-in updates. For devpi-web you might have to run ``--recreate-search-index`` in case you want to go back to a previous version. Besides that there are no changes preventing a downgrade. But it's best to test devpi-web on a replica which can be rebuilt if necessary. Speaking of rebuilding replicas: With the ``--replica-file-search-path`` option and the ``--hard-links`` option it is possible to vastly cut down the replication time when you already have the files on disk. Either create the new replica in a new folder, or rename the old server folder to create the new replica in the same place. Then run the new replica with ``--replica-file-search-path old_location/+files --hard-links`` and while replicating the new replica will look for existing files in the specified location and create hard links if it finds one and it's checksum matches. As the version number already indicates, devpi-web has the biggest changes, namely dropping Python 2.7 support, a different way to index projects and several changes to templates which might require updates in themes: 4.0.0.dev1 (2019-09-18) ======================= Deprecations and Removals ------------------------- - Dropped support for Python 2.7. Features -------- - project.pt: implement #319 - add link to latest version and summary of latest version to project view - doc.pt: implement #339: when viewing older documentation, show link to latest and stable documentation. - implement #346: add support for 'latest' and 'stable' versions for project version URLs - version.pt, style.css: implement #347 - show navigation link when newer version is available - The search indexing is now performed in a separate thread. Indexing prioritizes private indexes, then projects downloaded from mirrors and lastly never downloaded projects from mirrors. - On server start a refresh run for the search index is started automatically. In addition to that the indexing is done in smaller batches, which allows resuming of indexing the large pypi project lists. - In many cases re-indexing is now avoided. - version.pt, common.js: all list like metadata is now collapsed to ~3 lines instead of only classifiers. - The ``--recreate-search-index`` option now just removes the whole index. Upon server restart the index is rebuilt automatically in the background. - With devpi-server 5.1.1 or newer, indexing of mirrors will not trigger a refresh of the simple links for projects which have downloaded releases. This allows quicker indexing for new replicas and in case the search index is rebuilt using ``--recreate-search-index``. - root.pt: added new view for user Bug Fixes --------- - Pass query string on to documentation iframe, this fixes Sphinx search among other things. Other Changes ------------- - macros.pt, version.pt, style.css: moved separators to css. - The minimum supported version of devpi-server is now 5.1.0. - The interface of ``update_projects`` for search indexers has changed. The list of projects is now a list of ``ProjectIndexingInfo`` objects instead of ``dict``. To get the dictionary as before, call ``preprocess_project`` on the object. 5.2.0.dev0 (2019-09-18) ======================= Features -------- - Metrics for the sqlite storage cache are exposed in the JSON output of the +status view. Bug Fixes --------- - fix #545: provide proper error message when there is an exception during push to an external repository. - Fix possible race condition when writing files. - Fix possible assertion error if importing multiple changes in a replica fails in the middle and fetching a single change set is tried as fallback. - For plugins the ``offline`` attribute of mirror stage instances now works independently of the ``--offline-mode`` command line option. This only applies to ``_perstage`` methods. - Files created in a transaction are written directly to temporary files instead of being kept in memory until commit. - Unnecessary database writes where the final value didn't change are now prevented. Other Changes ------------- - The timeout when fetching the list of remote projects for a mirror index is set to a minimum of 30s by default and to 60s when running as replica. Other fetches of mirrors still use the timeout specified via ``--request-timeout``.

9 months

Questions about high availability and replication

by Nicholas Williams

Hello, My organization is exploring replacing our current, patched-together "wheelhouse" with a proper Devpi server mirroring PyPi and hosting our internal packages. Because this Devpi architecture will be accessed by hundreds of developers and over 100 build server workers, it needs to be highly available (able to handle a lot of traffic). So this leads me to several questions (five major questions and a few sub-questions, to be more accurate): - Is anyone familiar with a threshold of diminishing returns when it comes to the "threads" server setting? At what point, if any, does increasing this number do no good? I assume that # of "threads" roughly equates to # of simultaneous connections that single server is capable of, perhaps minus one or two. Is this a fair assumption? - How many "devpi-server" instances can access a single "serverdir?" Is it just one, and bad things will happen if a second "devpi-server" tries to access it (and, if I need multiple servers, I should use master-replica replication)? Or can multiple "devpi-server" instances access a single "serverdir" to serve as multiple hot masters? - When employing master-replica replication, I'm wondering if the following configuration is sensible, or if there are better approaches: 1) One (or possibly more, if allowed) master, 2) Two or more replicas replicating off the master, 3) An HTTPS load balancer that sends all traffic to the replicas (not the master? or include the master in the load balancing?). In this case, what happens if someone uses the https://load-balanced-devpi-url/ URL to publish a new package? Does a replica it lands on just forward that up to the master? Or does the user get an error? Or do worse things happen? - When employing master-replica replication, I noticed in the documentation this word of caution: "You probably want to make sure that before starting the replica and/or master that you also have the Web interface and search plugin installed. You cannot install it later." To be clear, I already have "devpi-web" installed (and a theme, too), but this note confuses (and slightly concerns) me, so I'd like to understand it better. Why would you be unable to install "devpi-web" after starting a master or replica? What would it break? Why wouldn't this work? Or do you just mean that you would have to shut down the servers to install "devpi-web" (which is understandable)? Is this different from non-replication environments (can you install "devpi-web" after starting a non-replicating server), and if so, why? I'm asking for details about this because I'm curious if it has potential consequences (stability, etc.) that extend beyond just the "devpi-web" plugin. - When creating a new index, could someone elaborate a bit more on the "mirror_whitelist" setting? What is the difference between not setting it at all (default/implicit) and explicitly setting it to "*"? What does "*" actually mean? When you upload a new package to the index that conflicts with a package in its base index, is the resulting behavior that the uploaded package (or perhaps just the versions you upload) ALWAYS overrides the one in the base index, regardless of the "mirror_whitelist" setting? My goal here is to have an index that uses "root/pypi" as its base and also hosts our internal packages, so that we can point Pipenv to one URL and install everything from there. Is there a more sensible approach than that which I am planning on taking? Thanks in advance for helping me make the right decisions in our upcoming deployment. Nick Williams

9 months

Is it possible to upload external test results for a package?

by con-f-use＠gmx.net

Salutations, another quick question about tox testing results: Given I have `results.json` file from a tox run, can I upload that to a devpi index without running the tests again? Background is that we build our packages in our CI system, test them without uploading them to an index, then if the tests succeed, we only upload the wheels to our devpi index. The way I have read the devpi documentation, displaying test results on the index always requires to upload a source distribution to that index (or optionally a "testing" index), then run the `devpi test` for that source distribution on that index, then (in case of the "testing" index) push the tested package to a production index if tests were successful and delete the package from the testing index. The two quarrels I have with that is, that it requires a source distribution on an inde and that faulty packages are on an index and need to be deleted or passing packages need to be pushed. So can I skip the testing part of `devpi test` and just upload the result from somewhere else along with the tested wheel? Regards, Christoph

9 months, 2 weeks

mirror_whitelist negation

by con-f-use＠gmx.net

Hi, quick question: If I want to whitelist everything but a few packages, is that possible with devpi indexes and if so what is the syntax? E.g. i'd expect: `mirror_whitelist=['*', '!somepack', '!mypackage']` would whitelist things like `pip` and `setuptools` but not the two explicitly forbidden packages named somepack and mypackage. Cheers and thx, Christoph

9 months, 2 weeks

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devpi-dev September 2019