Install Docker in CentOS7
env: CentOS7
參考來源:
https://docs.docker.com/install/linux/docker-ce/centos/#install-using-the-repository
1.準備CentOS7，並且與外部網路相通
2.使用yum安裝所需要的packages
因為package再安裝CentOS7時已經安裝，所以最後出現
Nothing to do
[root@localhost cdrom]#
sudo yum install -y yum-utils \
>
device-mapper-persistent-data \
>
lvm2
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: linux.cs.nctu.edu.tw
* extras: linux.cs.nctu.edu.tw
* updates: linux.cs.nctu.edu.tw
Package yum-utils-1.1.31-45.el7.noarch already installed and latest version
Package device-mapper-persistent-data-0.7.3-3.el7.x86_64 already installed and latest version
Package 7:lvm2-2.02.177-4.el7.x86_64 already installed and latest version
Nothing to do
3.設定repo， 之後要透過此設定來下載docker與安裝docker
[root@localhost cdrom]#
sudo yum-config-manager \
>
--add-repo \
>
https://download.docker.com/linux/centos/docker-ce.repo
Loaded plugins: fastestmirror, langpacks
adding repo from:
https://download.docker.com/linux/centos/docker-ce.repo
grabbing file
https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo
4.啟用名稱為docker-ce-test repositories
[root@localhost cdrom]#
sudo yum-config-manager --enable docker-ce-test
Loaded plugins: fastestmirror, langpacks
============================= repo: docker-ce-test =============================
[docker-ce-test]
async = True
bandwidth = 0
base_persistdir = /var/lib/yum/repos/x86_64/7
baseurl =
https://download.docker.com/linux/centos/7/x86_64/test
cache = 0
cachedir = /var/cache/yum/x86_64/7/docker-ce-test
check_config_file_age = True
compare_providers_priority = 80
cost = 1000
deltarpm_metadata_percentage = 100
deltarpm_percentage =
enabled = 1
enablegroups = True
exclude =
failovermethod = priority
ftp_disable_epsv = False
gpgcadir = /var/lib/yum/repos/x86_64/7/docker-ce-test/gpgcadir
gpgcakey =
gpgcheck = True
gpgdir = /var/lib/yum/repos/x86_64/7/docker-ce-test/gpgdir
gpgkey =
https://download.docker.com/linux/centos/gpg
hdrdir = /var/cache/yum/x86_64/7/docker-ce-test/headers
http_caching = all
includepkgs =
ip_resolve =
keepalive = True
keepcache = False
mddownloadpolicy = sqlite
mdpolicy = group:small
mediaid =
metadata_expire = 21600
metadata_expire_filter = read-only:present
metalink =
minrate = 0
mirrorlist =
mirrorlist_expire = 86400
name = Docker CE Test - x86_64
old_base_cache_dir =
password =
persistdir = /var/lib/yum/repos/x86_64/7/docker-ce-test
pkgdir = /var/cache/yum/x86_64/7/docker-ce-test/packages
proxy = False
proxy_dict =
proxy_password =
proxy_username =
repo_gpgcheck = False
retries = 10
skip_if_unavailable = False
ssl_check_cert_permissions = True
sslcacert =
sslclientcert =
sslclientkey =
sslverify = True
throttle = 0
timeout = 30.0
ui_id = docker-ce-test/x86_64
ui_repoid_vars = releasever,
basearch
username =
5.透過yum下載docker並安裝docker。
這裡安裝的是社群板。
[root@localhost cdrom]#
sudo yum install docker-ce
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
* base: linux.cs.nctu.edu.tw
* extras: linux.cs.nctu.edu.tw
* updates: linux.cs.nctu.edu.tw
docker-ce-stable | 2.9 kB 00:00:00
docker-ce-test | 2.9 kB 00:00:00
(1/2): docker-ce-stable/x86_64/primary_db | 13 kB 00:00:00
(2/2): docker-ce-test/x86_64/primary_db | 47 kB 00:00:00
Resolving Dependencies
--> Running transaction check
---> Package docker-ce.x86_64 0:18.05.0.ce-3.el7.centos will be installed
--> Processing Dependency: container-selinux >= 2.9 for package: docker-ce-18.05.0.ce-3.el7.centos.x86_64
--> Processing Dependency: pigz for package: docker-ce-18.05.0.ce-3.el7.centos.x86_64
--> Running transaction check
---> Package container-selinux.noarch 2:2.55-1.el7 will be installed
---> Package pigz.x86_64 0:2.3.3-1.el7.centos will be installed
--> Finished Dependency Resolution
Dependencies Resolved
====================================================================================================
Package Arch Version Repository Size
====================================================================================================
Installing:
docker-ce x86_64 18.05.0.ce-3.el7.centos docker-ce-test 35 M
Installing for dependencies:
container-selinux noarch 2:2.55-1.el7 extras 34 k
pigz x86_64 2.3.3-1.el7.centos extras 68 k
Transaction Summary
====================================================================================================
Install 1 Package (+2 Dependent packages)
Total download size: 35 M
Installed size: 151 M
Is this ok [y/d/N]: y
Downloading packages:
warning: /var/cache/yum/x86_64/7/extras/packages/container-selinux-2.55-1.el7.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Public key for container-selinux-2.55-1.el7.noarch.rpm is not installed
(1/3): container-selinux-2.55-1.el7.noarch.rpm | 34 kB 00:00:00
(2/3): pigz-2.3.3-1.el7.centos.x86_64.rpm | 68 kB 00:00:00
warning: /var/cache/yum/x86_64/7/docker-ce-test/packages/docker-ce-18.05.0.ce-3.el7.centos.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 621e9f35: NOKEY
Public key for docker-ce-18.05.0.ce-3.el7.centos.x86_64.rpm is not installed
(3/3): docker-ce-18.05.0.ce-3.el7.centos.x86_64.rpm | 35 MB 00:00:05
----------------------------------------------------------------------------------------------------
Total 6.2 MB/s | 35 MB 00:00:05
Retrieving key from
file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Importing GPG key 0xF4A80EB5:
Userid : "CentOS-7 Key (CentOS 7 Official Signing Key) <
security@centos.org>"
Fingerprint: 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5
Package : centos-release-7-5.1804.el7.centos.x86_64 (@anaconda)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Is this ok [y/N]: y
Retrieving key from
https://download.docker.com/linux/centos/gpg
Importing GPG key 0x621E9F35:
Userid : "Docker Release (CE rpm) <
docker@docker.com>"
Fingerprint: 060a 61c5 1b55 8a7f 742b 77aa c52f eb6b 621e 9f35
From :
https://download.docker.com/linux/centos/gpg
Is this ok [y/N]: y
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : pigz-2.3.3-1.el7.centos.x86_64 1/3
Installing : 2:container-selinux-2.55-1.el7.noarch 2/3
Installing : docker-ce-18.05.0.ce-3.el7.centos.x86_64 3/3
Verifying : 2:container-selinux-2.55-1.el7.noarch 1/3
Verifying : docker-ce-18.05.0.ce-3.el7.centos.x86_64 2/3
Verifying : pigz-2.3.3-1.el7.centos.x86_64 3/3
Installed:
docker-ce.x86_64 0:18.05.0.ce-3.el7.centos
Dependency Installed:
container-selinux.noarch 2:2.55-1.el7 pigz.x86_64 0:2.3.3-1.el7.centos
Complete!
6.啟動docker
[root@localhost
cdrom]# sudo systemctl start docker
7.測試驗證docker。建立一個名為hello-world的container
[root@localhost cdrom]#
sudo docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
9bb5a5d4561a: Pull complete
Digest: sha256:f5233545e43561214ca4891fd1157e1c3c563316ed8e237750d59bde73361e77
Status: Downloaded newer image for hello-world:latest
