Paul Holzinger
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Accelerating Parallel Layer Creation
Read more: Accelerating Parallel Layer CreationEarlier this year, my colleague Jan Rodak worked on Accelerating Parallel Layer Removal. It worked out so well that we wanted to tackle the other side of the problem: Layer Creation. Layer creation is even slower than removal as we must write all data to disk and not just just unlink files so there is…
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Netavark 1.14 new features
Read more: Netavark 1.14 new featuresNetavark and Aardvark-dns v1.14 are out. Thanks to our contributors, the Netavark release is on the bigger side and did get quite a few features. So let’s have a look; all the features assume that you are also using Podman v5.4 DHCP Hostname Netavark now sends the container hostname as part of the DHCP request.…
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Podman 5.3 changes for improved networking experience with pasta
Read more: Podman 5.3 changes for improved networking experience with pastaUse pasta’s –map-guest-addr option As of Podman 5.0 we default to “pasta” as a rootless networking application to provide network connectivity for rootless containers. Compared to our previous default, slirp4netns, pasta works a bit differently. For instance, pasta, by default, does not use Network Address Translation (NAT). This means it will copy the host address…
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Podman 5.0 breaking changes in detail
Read more: Podman 5.0 breaking changes in detailPodman 5.0 is out, and with this also comes several breaking changes, but there is no reason to fear them; unless you are using podman machine, chances are you will not even notice them. Podman Machine The biggest breaking change is a major refactor for the podman machine config files. There is no migration from…
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Podman 5.0 containers.conf changes
Read more: Podman 5.0 containers.conf changesContainers.conf is our main configuration file for Podman, it holds various options to tweak the default Podman behavior. In this post you see the changes that we made to containers.conf with the Podman 5.0 release. The biggest change is making containers.conf read-only. Previously Podman modified the containers.conf file for storage of podman system connections and…
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Interaction between User namespaces and Capabilities
Read more: Interaction between User namespaces and CapabilitiesUser namespaces and capabilities are important kernel functionality to make containers secure. They allow to better isolate containers and limit the privileges a container might have. A while back a user reported a bug where some odd behavior was noticed when namespaces are shared between containers which could lead to security problems. Lets take closer…
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New Netavark firewalld reload service
Read more: New Netavark firewalld reload serviceOne longstanding problem with Podman is that your rootful containers may loose network connectivity after a while. For many users it is not be obvious what is causing such problems. Netavark configures NAT and port forwarding firewall rules. When another process is deleting our firewall rules the containers will loose connectivity. One such process is…
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CNI deprecation and removal from Podman 5.0
Read more: CNI deprecation and removal from Podman 5.0As written in an earlier blog by Brent we are going to replace the older CNI stack Netavark and Aardvark-dns. With Podman 5.0 on the horizon we have decided that it will be the perfect time to drop CNI support from our upstream builds. As mentioned in the prior blog post we will most likely…
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Lease dynamic IPs with Netavark
Read more: Lease dynamic IPs with NetavarkAs Brent announced Netavark v1.6 with DHCP support is released, together with podman v4.5 you can now use DHCP with your macvlan networks in only a few simple steps. In order to use macvlan and DHCP you must run Podman as root. First enable the dhcp proxy via systemd socket: Now just create a macvlan…
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Default Podman network subnets
Read more: Default Podman network subnetsWhenever you deal with networking you likely need ips and thus subnets. Podman is no different and uses some default subnets that you should be aware of. This post shows you what these are and how to change them if there is already a subnet in this range on your network. Podman network The default…
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Latest news
- Faster Podman Workloads on macOS and Windows
- Wrestling with Netlink: Adding Conntrack Support to Podman as an LFX Mentee
- BoltDB Database Migration
- Accelerating Parallel Layer Creation
- Those pesky system connections
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