Events: KubeCon, PyCon, OpenStack, PostgreSQL at LSFMM, Legal and Licensing Workshop (LLW)
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KubeCon's Europe 2018 Event Highlights Kubernetes' Progress, Expansion
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SecureDrop development sprint in PyCon 2018
SecureDrop will take part in PyCon US development sprints (from 14th to 17th May). This will be first time for the SecureDrop project to present in the sprints.
If you never heard of the project before, SecureDrop is an open source whistleblower submission system that media organizations can install to securely accept documents from anonymous sources. Currently, dozens of news organizations including The Washington Post, The New York Times, The Associated Press, USA Today, and more, use SecureDrop to preserve the anonymous tipline in an era of mass surveillance. SecureDrop is installed on-premises in the news organizations, and journalists and source both use a web application to interact with the system. It was originally coded by the late Aaron Swartz and is now managed by Freedom of the Press Foundation.
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Highlights from the OpenStack project teams gathering
A few weeks back in Dublin, Ireland, OpenStack engineers gathered from dozens of countries and companies to discuss the next release of OpenStack. This is always my favorite OpenStack event, because I get to do interviews with the various teams, to talk about what they did in the just-released version (Queens, in this case) and what they have planned for the next one (Rocky).
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PostgreSQL visits LSFMM
The recent fsync() woes experienced by PostgreSQL led to a session on the first day (April 23) of the 2018 Linux Storage, Filesystem, and Memory-Management Summit (LSFMM). Those problems also led to a second-day session with PostgreSQL developer Andres Freund who gave an overview of how PostgreSQL does I/O and where that ran aground on some assumptions that had been made. The session led to a fair amount of discussion with the filesystem-track developers; real solutions seem to be in the offing.
PostgreSQL is process-based; there are no threads used, Freund said. It does write-ahead logging (WAL) for durability and replication. That means it logs data before it is marked dirty and the log is flushed before the dirty data is written. Checkpointing is done in the background with writes that are throttled as needed. In general, all data I/O is buffered, though the WAL can use direct I/O.
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Containers and license compliance
Containers are, of course, all the rage these days; in fact, during his 2018 Legal and Licensing Workshop (LLW) talk, Dirk Hohndel said with a grin that he hears "containers may take off". But, while containers are easy to set up and use, license compliance for containers is "incredibly hard". He has been spending "way too much time" thinking about container compliance recently and, beyond the standard "let's go shopping" solution to hard problems, has come up with some ideas. Hohndel is a longtime member of the FOSS community who is now the chief open source officer at VMware—a company that ships some container images.
He said that he would be using Docker in his examples, but he is not picking on Docker, it is just a well-known container management system. His talk is targeting those that want to ship an actual container image, rather than simply a Dockerfile that a customer would build into an image. He has heard of some trying to avoid "distributing" free and open-source software that way, but is rather skeptical of that approach.
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