This report covers weekly developments in the moby/vpnkit, mirage/ocaml-dns, mirage/ocaml-hvsock, djs55/ocaml-osx-dnssd, mirage/mirage-tcpip and djs55/ocaml-dns-forward repositories. These form the basis of the VPNKit toolkit used to translate container network traffic into native platform socket calls on Windows and OSX.
This week primarily saw fixes in the MirageOS TCP/IP stack relating to MTU handling. There were a couple of library releases with relevant fixes: tcpip-3.1.1 fixed parsing issues, and tcpip-3.1.2 limited the TCP MSS to never exceed the local MTU, which was a problem on virtio-based backends.
VPNKit also got a new feature to add builtin DNS names, which make it easier to map hostnames into virtual IP addresses being managed by VPNKit. This patch added a command-line argument --host-names that accepts a comma-separated list of DNS names which will be mapped to the current host virtual IP (moby/vpnkit#220 @djs55). The default name is vpnkit.host but this can be overriden or extended.
- Compatibility with lwt >= 2.7.0 (mirage/mirage-tcpip#308 @djs55)
- Stop sending overly large packets greater than the MTU (mirage/mirage-tcpip#309 @djs55 @avsm @hannesm)
- Prepare to release v3.1.1 mirage/mirage-tcpip#311 @yomimono @djs55
- Prepare to release v3.1.2 mirage/mirage-tcpip#312 @hannesm @djs55
Other reports in this series can be browsed directly in the repository at moby/vpnkit:/reports.