alpinebootstrap

Why?

Layers, and be able to create a new container fast.

How?

Alpine linux use apk for package management.

We leverage on this to create a chroot and optionally create a docker image.

Requirements

Linux
Docker if using -d option

Demo time

go1.5

root@nuc:~# time alpinebootstrap.sh -d -c -p alpine-go15 go
-d was triggered, docker container will be created
-c was triggered, community repo will be enabled
Additional packages to be installed:
go

root@nuc:~# docker run --rm -i alpine-go15 go version
go version go1.5.3 linux/amd64
root@nuc:~# 

root@nuc:~# docker images alpine-go15
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
alpine-go15         latest              4ca8a461be9b        4 seconds ago       179.5 MB
root@nuc:~# 

root@nuc:~# docker history alpine-go15
IMAGE               CREATED             CREATED BY          SIZE                COMMENT
4ca8a461be9b        9 minutes ago                           179.5 MB            Imported from -

go1.6

root@nuc:~# time alpinebootstrap.sh -d -c -e -p alpine-go16 go                                                                                                                                                                                
-d was triggered, docker container will be created
-c was triggered, community repo will be enabled
-e was triggered, edge version will be used
version overriden to edge
Additional packages to be installed:
go

root@nuc:~# docker run --rm -i alpine-go16 go version
go version go1.6 linux/amd64
root@nuc:~# 

root@nuc:~# docker images alpine-go16
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
alpine-go16         latest              26d9a2d01bad        6 seconds ago       192.5 MB
root@nuc:~#

root@nuc:~# docker history alpine-go16
IMAGE               CREATED             CREATED BY          SIZE                COMMENT
26d9a2d01bad        10 minutes ago                          192.5 MB            Imported from -

vs `golang:latest`

root@nuc:~# docker images golang
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
golang              latest              2529f72145a7        4 days ago          743.9 MB

root@nuc:~# docker run golang:latest go version
go version go1.6 linux/amd64

root@nuc:~# docker history golang:latest
IMAGE               CREATED             CREATED BY                                      SIZE                COMMENT
2529f72145a7        4 days ago          /bin/sh -c #(nop) COPY file:7e87b0ea22c04c4eb   2.481 kB            
<missing>           4 days ago          /bin/sh -c #(nop) WORKDIR /go                   0 B                 
<missing>           4 days ago          /bin/sh -c mkdir -p "$GOPATH/src" "$GOPATH/bi   0 B                 
<missing>           4 days ago          /bin/sh -c #(nop) ENV PATH=/go/bin:/usr/local   0 B                 
<missing>           4 days ago          /bin/sh -c #(nop) ENV GOPATH=/go                0 B                 
<missing>           4 days ago          /bin/sh -c curl -fsSL "$GOLANG_DOWNLOAD_URL"    318 MB              
<missing>           4 days ago          /bin/sh -c #(nop) ENV GOLANG_DOWNLOAD_SHA256=   0 B                 
<missing>           4 days ago          /bin/sh -c #(nop) ENV GOLANG_DOWNLOAD_URL=htt   0 B                 
<missing>           4 days ago          /bin/sh -c #(nop) ENV GOLANG_VERSION=1.6        0 B                 
<missing>           4 days ago          /bin/sh -c apt-get update && apt-get install    134 MB              
<missing>           5 days ago          /bin/sh -c apt-get update && apt-get install    122.6 MB            
<missing>           3 weeks ago         /bin/sh -c apt-get update && apt-get install    44.29 MB            
<missing>           3 weeks ago         /bin/sh -c #(nop) CMD ["/bin/bash"]             0 B                 
<missing>           3 weeks ago         /bin/sh -c #(nop) ADD file:b5391cb13172fb513d   125.1 MB            
root@nuc:~#

Options

[-c] enable community repo.

[-d] create docker image, will use path name for container.

[-e] enable edge version. Default is latest-release, ie stable one.

[-h] help.

[-t] enable testing repo. It will override to edge version.

-p <path> chroot to be used. This will be created on current directory, and reused for next run.

-v [<version>] to override the version. Defaults to latest-release, this are Alpine linux optiones ie. edge, latest-release, 3.3, 3.2, etc.

[<package>] list of packages to be installed, this are alpine package names.

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