Kata Containers and Ubuntu Linux - lessons learned - 4/many

Building on the series: -

Kata Containers and Ubuntu Linux - lessons learned - 1/many

Kata Containers and Ubuntu Linux - lessons learned - 2/many

Kata Containers and Ubuntu Linux - lessons learned - 3/many - a WIP

I've also had some fun n' games trying to build various components of Kata Containers 2.0 under Ubuntu, including the kernel that's used within the guest Virtual Machine (VM) ...

Problem

Building the kernel: -

sudo ./build-kernel.sh build

fails with: -

/home/hayd/go/src/github.com/kata-containers/kata-containers/tools/packaging/kernel/../scripts/lib.sh: line 25: go: command not found
~/go/src/github.com/kata-containers/tests /home/hayd/go/src/github.com/kata-containers/kata-containers/tools/packaging/kernel
/home/hayd/go/src/github.com/kata-containers/kata-containers/tools/packaging/kernel
INFO: Config version: 85
INFO: Kernel version: 5.10.25
***
*** Configuration file ".config" not found!
***
*** Please run some configurator (e.g. "make oldconfig" or
*** "make menuconfig" or "make xconfig").
***
make: *** [Makefile:697: .config] Error 1

Similarly: -

sudo ./build-kernel.sh setup

fails with: -

/home/hayd/go/src/github.com/kata-containers/kata-containers/tools/packaging/kernel/../scripts/lib.sh: line 25: go: command not found
~/go/src/github.com/kata-containers/tests /home/hayd/go/src/github.com/kata-containers/kata-containers/tools/packaging/kernel
/home/hayd/go/src/github.com/kata-containers/kata-containers/tools/packaging/kernel
INFO: Config version: 85
INFO: Kernel version: 5.10.25
INFO: kernel path does not exist, will download kernel
linux-5.10.25.tar.xz: OK
INFO: kernel tarball already downloaded
linux-5.10.25.tar.xz: OK
INFO: Apply patches from /home/hayd/go/src/github.com/kata-containers/kata-containers/tools/packaging/kernel/patches/5.10.x
INFO: Found 2 patches
INFO: Apply /home/hayd/go/src/github.com/kata-containers/kata-containers/tools/packaging/kernel/patches/5.10.x/0001-arm64-mmu-compared-with-linear-start-physical-addres.patch
INFO: Apply /home/hayd/go/src/github.com/kata-containers/kata-containers/tools/packaging/kernel/patches/5.10.x/0001-NO-UPSTREAM-9P-always-use-cached-inode-to-fill-in-v9.patch
INFO: Constructing config from fragments: /home/hayd/go/src/github.com/kata-containers/kata-containers/tools/packaging/kernel/configs/fragments/x86_64/.config
/bin/sh: 1: flex: not found
make[1]: *** [scripts/Makefile.host:9: scripts/kconfig/lexer.lex.c] Error 127
make: *** [Makefile:602: allnoconfig] Error 2

In both cases, the problems is missing pre-requisites ...

Solution

Install the missing prereqs e.g. flex, bison etc.

apt-get update && apt-get --with-new-pkgs upgrade -y 

apt-get install -y docker.io make flex bison libelf-dev

etc.