【转载】轻量级Kubernetes之k3s：16:源码编译k3s

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轻量级Kubernetes之k3s：16:源码编译k3s  
原创liumiaocn 最后发布于2019-12-06 20:53:15 阅读数 63  收藏  
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这篇文章介绍一下源码编译k3s的方法。

事前准备  
go语言环境  
go语言版本需要go 1.12，本文示例使用1.13.5\[root@liumiaocn ~\]\# go version  
go version go1.13.5 linux/amd64  
\[root@liumiaocn ~\]\# ，安装步骤如下所示

步骤1: 下载go语言安装包  
执行命令：wget https://dl.google.com/go/go1.13.5.linux-amd64.tar.gz

步骤2: 设定环境变量  
在/etc/profile中设定GOROOT和PATH，详细如下所示

\[root@liumiaocn ~\]\# tail -n2 /etc/profile  
export GOROOT=/usr/local/go  
export PATH=$PATH:$\{GOROOT\}/bin  
\[root@liumiaocn ~\]\#  
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步骤3：确认版本  
重新登录之后即可执行go version确认版本

\[root@liumiaocn ~\]\# go version  
go version go1.13.5 linux/amd64  
\[root@liumiaocn ~\]\#   
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安装gcc  
安装命令：yum install gcc

安装libseccomp开发包  
CentOS/RHEL下： yum install libseccomp-devel  
Ubuntu/Debian下： apt-get install libseccomp-dev

下载k3s源码包  
\[root@liumiaocn ~\]\# git clone http://github.com/rancher/k3s.git  
Cloning into 'k3s'...  
remote: Enumerating objects: 37, done.  
remote: Counting objects: 100% (37/37), done.  
remote: Compressing objects: 100% (29/29), done.  
remote: Total 926826 (delta 10), reused 18 (delta 5), pack-reused 926789  
Receiving objects: 100% (926826/926826), 518.39 MiB | 22.51 MiB/s, done.  
Resolving deltas: 100% (676821/676821), done.  
Checking out files: 100% (12503/12503), done.  
\[root@liumiaocn ~\]\#  
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或者使用如下命令下载源码1.0.0的源码压缩包

wget https://github.com/rancher/k3s/archive/v1.0.0.tar.gz

编译k3s  
\[root@liumiaocn ~\]\# cd k3s  
\[root@liumiaocn k3s\]\# ls   
BUILDING.md                 LICENSE    Vagrantfile  docker-compose.yml  go.sum       main.go    pkg      vendor  
Dockerfile.dapper           Makefile   cmd          e2e                 install.sh   manifests  scripts  vendor.go  
Dockerfile.sonobuoy.dapper  README.md  contrib      go.mod              k3s.service  package    tests  
\[root@liumiaocn k3s\]\# go build -o k3s  
go: downloading github.com/sirupsen/logrus v1.4.2  
go: downloading github.com/rancher/kubernetes/staging/src/k8s.io/client-go v1.16.3-k3s.2  
go: downloading github.com/pkg/errors v0.8.1  
go: downloading github.com/rancher/kubernetes/staging/src/k8s.io/apimachinery v1.16.3-k3s.2  
go: downloading github.com/rootless-containers/rootlesskit v0.6.0  
...省略  
\[root@liumiaocn k3s\]\# ls  
bin          cmd                 Dockerfile.dapper           etc     install.sh   LICENSE   manifests  README.md  Vagrantfile  
build        contrib             Dockerfile.sonobuoy.dapper  go.mod  k3s          main.go   package    scripts    vendor  
BUILDING.md  docker-compose.yml  e2e                         go.sum  k3s.service  Makefile  pkg        tests      vendor.go  
\[root@liumiaocn k3s\]\# ./k3s --version  
k3s version dev (HEAD)  
\[root@liumiaocn k3s\]\#   
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注：如果希望构建完整版本的二进制文件，直接执行make即可。

常见错误  
缺少libseccomp开发库  
Package libseccomp was not found in the pkg-config search path.  
Perhaps you should add the directory containing \`libseccomp.pc'  
to the PKG\_CONFIG\_PATH environment variable  
No package 'libseccomp' found  
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CentOS/RHEL下： yum install libseccomp-devel  
Ubuntu/Debian下： apt-get install libseccomp-dev

make构建完整版本二进制文件时需要docker启动状态  
\[root@liumiaocn k3s\]\# make  
./.dapper ci  
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?  
FATA\[0005\] exit status 1                                  
make: \*\*\* \[ci\] Error 1  
\[root@liumiaocn k3s\]\# systemctl start docker  
\[root@liumiaocn k3s\]\#  
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内存不够  
很多显示为signal killed的错误可能都是因为可用内存过少导致的，可考虑增大可用内存再试  
/usr/local/go/pkg/tool/linux\_amd64/link: signal: killed  
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内存实在不足时，也可以考虑增加swap来应对，只是速度会慢一些，比如使用如下的方式增加1G的swap

\[root@liumiaocn ~\]\# swapon  
NAME  TYPE SIZE USED PRIO  
/swap file 132M   0B   -1  
\[root@liumiaocn ~\]\#   
\[root@liumiaocn ~\]\# dd if=/dev/zero of=/root/swapfile bs=1M count=1024  
1024+0 records in  
1024+0 records out  
1073741824 bytes (1.1 GB) copied, 2.52969 s, 424 MB/s  
\[root@liumiaocn ~\]\#   
\[root@liumiaocn ~\]\# mkswap /root/swapfile  
Setting up swapspace version 1, size = 1048572 KiB  
no label, UUID=feb9aea6-2e80-4473-ae58-56c18d49699b  
\[root@liumiaocn ~\]\#   
\[root@liumiaocn ~\]\# swapon /root/swapfile  
swapon: /root/swapfile: insecure permissions 0644, 0600 suggested.  
\[root@liumiaocn ~\]\#   
\[root@liumiaocn ~\]\# vi /etc/fstab  
\[root@liumiaocn ~\]\#   
\[root@liumiaocn ~\]\# grep swapfile /etc/fstab  
/root/swapfile swap swap defaults 0 0  
\[root@liumiaocn ~\]\#   
\[root@liumiaocn ~\]\# swapon  
NAME           TYPE  SIZE USED PRIO  
/swap          file  132M   0B   -1  
/root/swapfile file 1024M   0B   -2  
\[root@liumiaocn ~\]\#   
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参考内容  
https://docs.rancher.cn/k3s/building.html\#\_1-kubernetes-source  
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版权声明：本文为CSDN博主「liumiaocn」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。  
原文链接：https://blog.csdn.net/liumiaocn/article/details/103415814