Tag Archives: arm64

ARM64 Centos8 PXE Boot Install

This document will introduce how to setup a centos PXE boot environment on ubuntu 18.04 for install centos8 to your ARM64 machine.

In this document, it uses CentOS 8 version is 8.1.1911, it might also work on later version if you change file name accordingly . 

all command in this document we assume you already run with root permission. 

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ARM64 mfpu=neon-fp-armv8 and unrecognized command line option

又學到一個小知識

原因是因為 -mfpu=neon-fp-armv8 是 arm32 compiler option ARM64 使用 Linux ABI 那邊就規範要支援 Floatpoint 和 ASIMD(也就是 neon 的 64bit 版 )

不要用 -mfpu 指令就可以了

ref.
-mfpu=neon-fp-armv8 and unrecognized command line option

Kubernetes install nginx-ingress on ARM64

It’s easy. it needs to install helm first and just run following command

helm install \
    --name nginx-ingress stable/nginx-ingress \
    --namespace ingress-nginx \
    --set rbac.create=true \
    --set controller.image.repository="quay.io/kubernetes-ingress-controller/nginx-ingress-controller-arm64" \
    --set defaultBackend.image.repository="k8s.gcr.io/defaultbackend-arm64"

ref.
https://github.com/kubernetes/ingress-nginx/issues/4876
https://github.com/kubernetes/ingress-nginx/pull/3852

Linkerd2 for ARM64

There is no regular ARM64 support for Linkerd2 now.

So, I built one for test.
All necessary packages will be downloaded from my private docker.io account. not from regular linkerd2 repository.

Linkerd2 version is master version between v2.6.0 and next version
emojivoto version is v9 (master version)

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ARM64 Kubernetes Nginx Traefik Ingress Load Balance

My original target purpose is very simple, build deploy several webserver and assigned a external ip for internet to access it.

Most kubernetes newbie install guide won’t mention how to do that. actually that’s very simple, for external ip, it needs a load balance controller like metallb for create a external ip address to access web server. and an Ingress contoller like Traefik for http/https route to right pods .

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Ubuntu 18.04 ARM64 DPDK in VM (QEMU)

DPDK is a very popular infrastructure in high speed packet process domain, some applications will used the same architecture to process packet, like EPC.

For Ubuntu 18.04, it used dpdk 17.11, it not good for some other application like dpdk pktgen, but enough for testpmd and l3fwd test. here is some personal note for setup whole environment.

DPDK in QEMU archeticture
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Gentoo ARM64 Docker Image

There is a long time no article about gentoo on my blog.

Today, I have a whim to do a gentoo ARM64 docker image, so, we have this article.

Please understand that ARM64 Gentoo is experimental, and might be different after a while.

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QEMU Run x86_64 on ARM64 Server command

This is a work note for run x86_64 on ARM64 server .
Because they are different archeticture, so, run x86_64 on ARM server would be very slow.

and some functions might be different when run on different platform

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Kdump in ubuntu 18.04 ARM64


kdump is very good tool to debug complex system like cloud data center, it can easy to save kernel status when crash.
Running kdump in ARM64 just like running in x86, but I met a strange problem on ARM64 platform.

The kernel version is HWE kernel, current version is 4.18.0-25, mihbt be encounter those problems

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ARM64 Kdump cannot allocate crashkernel

In ARM64 server and installed memory around 128G, ubuntu default /etc/default/grub.d/kdump-tools.cfg default configuration might cause kdump allocate memory failed. error message as below

[ 0.000000] cannot allocate crashkernel (size:0x80000000)
[ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.18.0-25-generic root=UUID=ee8be10d-d649-425d-a807-640751836186 ro console=tty0 crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M

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