輕量級Kubernetes之k3s：16:源碼編譯k3s
原創liumiaocn 最後發佈於2019-12-06 20:53:15 閱讀數 63 收藏
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這篇文章介紹一下源碼編譯k3s的方法。
事前準備
go語言環境
go語言版本需要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 ~]# ，安裝步驟如下所示
步驟1: 下載go語言安裝包
執行命令：wget https://dl.google.com/go/go1.13.5.linux-amd64.tar.gz
步驟2: 設定環境變量
在/etc/profile中設定GOROOT和PATH，詳細如下所示
[root@liumiaocn ~]# tail -n2 /etc/profile
export GOROOT=/usr/local/go
export PATH=$PATH:${GOROOT}/bin
[root@liumiaocn ~]#
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步驟3：確認版本
重新登錄之後即可執行go version確認版本
[root@liumiaocn ~]# go version
go version go1.13.5 linux/amd64
[root@liumiaocn ~]#
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安裝gcc
安裝命令：yum install gcc
安裝libseccomp開發包
CentOS/RHEL下： yum install libseccomp-devel
Ubuntu/Debian下： apt-get install libseccomp-dev
下載k3s源碼包
[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載源碼1.0.0的源碼壓縮包
wget https://github.com/rancher/k3s/archive/v1.0.0.tar.gz
編譯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：如果希望構建完整版本的二進制文件，直接執行make即可。
常見錯誤
缺少libseccomp開發庫
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構建完整版本二進制文件時需要docker啓動狀態
[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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內存不夠
很多顯示爲signal killed的錯誤可能都是因爲可用內存過少導致的，可考慮增大可用內存再試
/usr/local/go/pkg/tool/linux_amd64/link: signal: killed
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內存實在不足時，也可以考慮增加swap來應對，只是速度會慢一些，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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參考內容
https://docs.rancher.cn/k3s/building.html#_1-kubernetes-source
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版權聲明：本文爲CSDN博主「liumiaocn」的原創文章，遵循 CC 4.0 BY-SA 版權協議，轉載請附上原文出處鏈接及本聲明。
原文鏈接：https://blog.csdn.net/liumiaocn/article/details/103415814
