Run on CentOS 7

Warning

CentOS 7 and RHEL 6.5/7 do not support eBPF out of the box; in other words, you must build the kernel (>= 5.8) yourself and install it.

Introduction

CentOS 7 is a veteran Linux distribution, although its life cycle is not long, but there should still be some people using it. This article documents the steps to run dae on CentOS 7 or RHEL 6.5.

Upgrade process

Updating the kernel

Update the kernel that supports BTF

curl -s https://repo.cooluc.com/mailbox.repo > /etc/yum.repos.d/mailbox.repo
yum makecache
yum update kernel

Note

The kernel is based on Linux 6.1 LTS, rebuilt to support BBRv2, and enables eBPF support. It can also be compiled by yourself, and the source package is available at https://repo.cooluc.com/kernel/7/SRPMS/

Mount BPF

curl -s https://repo.cooluc.com/kernel/files/sys-fs-bpf.mount > /etc/systemd/system/sys-fs-bpf.mount
systemctl enable sys-fs-bpf.mount

Mount Control Group v2

curl -s https://repo.cooluc.com/kernel/mount-cgroup2.service > /etc/systemd/system/mount-cgroup2.service
systemctl enable mount-cgroup2.service

Reboot the system to make the kernel effective

Note

Check the kernel version. If the version is 6.1.xx-1.el7.x86_64, it means that the operation is successful.

uname -r

If the kernel version does not change, it means that the kernel has been updated before, and you need to rebuild the grub2 bootloader to make the new kernel the highest priority.

To set the latest kernel as the default:

grub2-set-default 0

To rebuild the kernel bootloader configuration:

grub2-mkconfig -o /boot/grub2/grub.cfg

Running dae

Now you can download dae and run it as usual

mkdir -p /opt/dae && cd /opt/dae
wget https://github.com/daeuniverse/dae/releases/download/v0.2.2/dae-linux-x86_64.zip
unzip dae-linux-x86_64.zip && rm -f dae-linux-x86_64.zip
cp example.dae config.dae
chmod 600 config.dae
DAE_LOCATION_ASSET=$(pwd) ./dae-linux-x86_64 run -c config.dae

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