Category: Linux

How to use virtual machines in LXD

Update 22 May 2020: The Ubuntu container images have been updated to install on first boot the LXD Agent in the VM. The corresponding section below has been updated so that you can skip the manual step, if your VM image does it for you. Update 22 May 2020: See also the tutorial at https://discuss.linuxcontainers.org/t/running-virtual-machines-with-lxd-4-0/7519 …

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Permanent link to this article: https://blog.simos.info/how-to-use-virtual-machines-in-lxd/

Running X11 software in LXD containers

Update February 2021: See the Notes below for extra steps when trying this on the Raspberry Pi 4. Updated instructions for LXD 4.5 (September 2020) LXD 4.5 has added features that make proxy devices more secure in the sense that if something goes wrong on the proxy device, your system is safer. Specifically, the proxy …

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Permanent link to this article: https://blog.simos.info/running-x11-software-in-lxd-containers/

How to add multi-line raw.lxc configuration to LXD

In LXD, you can add multiple settings in a single command line. For example, to both limit the memory to 2GB and the CPUs to a single core, you would run the following in a single line. Obviously, you can set these separately as well. lxc config set mycontainer limits.memory=2GB limits.cpu=1 See the LXD key/value …

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Permanent link to this article: https://blog.simos.info/how-to-add-multi-line-raw-lxc-configuration-to-lxd/

How to setup Netdata in a LXD container for real-time monitoring

Netdata does real-time health monitoring and performance troubleshooting for systems and applications. It helps you instantly diagnose slowdowns and anomalies in your infrastructure with thousands of metrics, interactive visualizations, and insightful health alarms. When you set it up on your system, Netdata sets up a Web page where you can view real-time information, including CPU …

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Permanent link to this article: https://blog.simos.info/how-to-setup-netdata-in-a-lxd-container-for-real-time-monitoring/

How to add both a private and public network to LXD using cloud-init

When you launch a new LXD container, LXD applies the default LXD profile unless you specify a different profile. By adding configuration to a LXD profile, you can launch containers with specific parameters such as specific network configuration. In the following we see how this default LXD profile looks like, and then use cloud-init instructions …

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Permanent link to this article: https://blog.simos.info/how-to-add-both-a-private-and-public-network-to-lxd-using-cloud-init/

How to use the LXD Proxy Device to map ports between the host and the containers

LXD supports proxy devices, which is a way to proxy connections between the host and containers. This includes TCP, UDP and Unix socket connections. For example, when someone connects to your host on port 80 (http), then this connection can be proxied to a container using a proxy device. In that way, you can isolate …

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Permanent link to this article: https://blog.simos.info/how-to-use-the-lxd-proxy-device-to-map-ports-between-the-host-and-the-containers/

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