Install Docker to Amazon Linux2

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Install Docker to Amazon Linux2
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Migration of Amazon Linux to Amazon Linux 2 causes yum install docker command doesn’t work in Amazon Linux 2, so I investigate how to install docker.

Motivation

Install Docker to Amazon Linux2 without error

My Packer build job stopped with error after AWS announced Amazon Linux 2 LTS Candidate in June 2018, because I migrated my server os Amazon Linux to Amazon Linux2.

Fail to execute yum install docker and yum search docker command because yum repository has been changed.

Install Docker with Extras Library

In Amazon Linux2, Extras Library is adopted to install some libraries.

Now list the libraries that can be installed.

 1amazon-linux-extras list
 2
 3  0  ansible2                 available  [ =2.4.2 ]
 4  1  emacs                    available  [ =25.3 ]
 5  2  memcached1.5             available  [ =1.5.1 ]
 6  3  nginx1.12                available  [ =1.12.2 ]
 7  4  postgresql9.6            available  [ =9.6.6  =9.6.8 ]
 8  5  python3                  available  [ =3.6.2 ]
 9  6  redis4.0                 available  [ =4.0.5 ]
10  7  R3.4                     available  [ =3.4.3 ]
11  8  rust1                    available  [ =1.22.1  =1.26.0 ]
12  9  vim                      available  [ =8.0 ]
13 10  golang1.9                available  [ =1.9.2 ]
14 11  ruby2.4                  available  [ =2.4.2  =2.4.4 ]
15 12  nano                     available  [ =2.9.1 ]
16 13  php7.2                   available  [ =7.2.0  =7.2.4  =7.2.5 ]
17 14  lamp-mariadb10.2-php7.2  available  \
18        [ =10.2.10_7.2.0  =10.2.10_7.2.4  =10.2.10_7.2.5 ]
19 15  libreoffice              available  [ =5.0.6.2_15 ]
20 16  gimp                     available  [ =2.8.22 ]
21 17  docker                   available  [ =17.12.1  =18.03.1 ]
22 18  mate-desktop1.x          available  [ =1.19.0  =1.20.0 ]
23 19  GraphicsMagick1.3        available  [ =1.3.29 ]
24 20  tomcat8.5                available  [ =8.5.31 ]

Docker exists in it.

Install Docker with amazon-linux-extras command.

 1amazon-linux-extras install docker
 2
 3...
 4
 5  0  ansible2                 available  [ =2.4.2 ]
 6  1  emacs                    available  [ =25.3 ]
 7  2  memcached1.5             available  [ =1.5.1 ]
 8  3  nginx1.12                available  [ =1.12.2 ]
 9  4  postgresql9.6            available  [ =9.6.6  =9.6.8 ]
10  5  python3                  available  [ =3.6.2 ]
11  6  redis4.0                 available  [ =4.0.5 ]
12  7  R3.4                     available  [ =3.4.3 ]
13  8  rust1                    available  [ =1.22.1  =1.26.0 ]
14  9  vim                      available  [ =8.0 ]
15 10  golang1.9                available  [ =1.9.2 ]
16 11  ruby2.4                  available  [ =2.4.2  =2.4.4 ]
17 12  nano                     available  [ =2.9.1 ]
18 13  php7.2                   available  [ =7.2.0  =7.2.4  =7.2.5 ]
19 14  lamp-mariadb10.2-php7.2  available  \
20        [ =10.2.10_7.2.0  =10.2.10_7.2.4  =10.2.10_7.2.5 ]
21 15  libreoffice              available  [ =5.0.6.2_15 ]
22 16  gimp                     available  [ =2.8.22 ]
23 17  docker=latest            enabled    [ =17.12.1  =18.03.1 ]
24 18  mate-desktop1.x          available  [ =1.19.0  =1.20.0 ]
25 19  GraphicsMagick1.3        available  [ =1.3.29 ]
26 20  tomcat8.5                available  [ =8.5.31 ]

Actually, install fixed version with docker=x.x.x and skip confirmation with -y option.

1amazon-linux-extras install -y docker=18.03.1