Instalando o Docker em uma VPS do Hostinger

Pré-requisitos - requisitos do sistema operacional

Para instalar o Docker Engine, você precisa da versão de 64 bits de uma destas versões do Ubuntu:

·       Ubuntu Hirsute 21.04

·       Ubuntu Groovy 20.10

·       Ubuntu Focal 20.04 (LTS)

·       Ubuntu Bionic 18.04 (LTS)

Uma Docker referenciada ao mundo da tecnologia é uma forma de virtualizar aplicações no conceito de “containers”, trazendo da web ou do seu repositório uma instância totalmente pronta para uso, incluindo todas as dependências necessárias para suas funcionalidades. Esta tecnologia surgiu sob a ótica de um projeto de software de código aberto, há uma comunidade open source que auxilia um grupo de voluntários no apoio para melhoria continuada do seu sistema.   

O Docker Engine é compatível com x86_64(ou amd64) armhf, e arm64arquiteturas.

Desinstale versões antigas 

Versões mais antigas do Docker foram chamados docker, docker.ioou docker-engine. Se estiverem instalados, desinstale-os:

sudo apt-get remove docker docker-engine docker.io containerd runc

 

Tudo bem se apt-getrelatar que nenhum desses pacotes está instalado. O conteúdo de /var/lib/docker/, incluindo imagens, contêineres, volumes e redes, é preservado.

 

Desinstale versões antigas 

Você pode instalar o Docker Engine de diferentes maneiras, dependendo de suas necessidades. Neste artigo será apresentada uma forma via repositório:

A maioria dos usuários configura os repositórios do Docker e instala a partir do seu repositório, para facilitar as tarefas de instalação e atualização. Esta é a abordagem recomendada.

 

1.     Instale usando o repositório

Antes de instalar o Docker Engine pela primeira vez em uma nova máquina host, você precisa configurar o repositório do Docker. Depois disso, você pode instalar e atualizar o Docker a partir do repositório.

Configure o repositório

Atualize o apt índice do pacote e instale os pacotes para permitir o apt uso de um repositório por HTTPS:

 

sudo apt-get update

 sudo apt-get install \

    apt-transport-https \

    ca-certificates \

    curl \

    gnupg \

    lsb-release

2.     Adicione a chave GPG oficial Docker

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

3.     Use o seguinte comando para configurar o repositório estável

echo \

  "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \

  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

 

 

4.    Instale o Docker Engine

 

Atualize o sistema usando o apt e instale a versão mais recente do Docker Engine e containerd.

 

sudo apt-get update

 sudo apt-get install docker-ce docker-ce-cli containerd.io

 

 SAÍDA DOS COMANDOS:

 

root@ssl0:~# docker -v

-bash: docker: command not found

root@ssl0:~# apt-get install docker-ce

Reading package lists... Done

Building dependency tree

Reading state information... Done

Package docker-ce is not available, but is referred to by another package.

This may mean that the package is missing, has been obsoleted, or

is only available from another source

 

E: Package 'docker-ce' has no installation candidate

root@ssl0:~# apt-get install docker

Reading package lists... Done

Building dependency tree

Reading state information... Done

docker is already the newest version (1.5-1build1).

0 upgraded, 0 newly installed, 0 to remove and 39 not upgraded.

root@ssl0:~# apt-get remove docker docker-engine docker.io containerd runc

Reading package lists... Done

Building dependency tree

Reading state information... Done

Package 'docker-engine' is not installed, so not removed

Package 'containerd' is not installed, so not removed

Package 'docker.io' is not installed, so not removed

Package 'runc' is not installed, so not removed

The following packages will be REMOVED:

  docker

0 upgraded, 0 newly installed, 1 to remove and 39 not upgraded.

After this operation, 45.1 kB disk space will be freed.

Do you want to continue? [Y/n] y

(Reading database ... 30626 files and directories currently installed.)

Removing docker (1.5-1build1) ...

Processing triggers for man-db (2.8.3-2ubuntu0.1) ...

root@ssl0:~# apt-get install \

>     apt-transport-https \

>     ca-certificates \

>     curl \

>     gnupg \

>     lsb-release

Reading package lists... Done

Building dependency tree

Reading state information... Done

lsb-release is already the newest version (9.20170808ubuntu1).

ca-certificates is already the newest version (20210119~18.04.1).

gnupg is already the newest version (2.2.4-1ubuntu1.4).

The following additional packages will be installed:

  libcurl4

The following NEW packages will be installed:

  apt-transport-https

The following packages will be upgraded:

  curl libcurl4

2 upgraded, 1 newly installed, 0 to remove and 37 not upgraded.

Need to get 382 kB of archives.

After this operation, 154 kB of additional disk space will be used.

Do you want to continue? [Y/n] y

Get:1 http://archive.ubuntu.com/ubuntu bionic-updates/universe amd64 apt-transport-https all 1.6.14 [4348 B]

Get:2 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 curl amd64 7.58.0-2ubuntu3.14 [159 kB]

Get:3 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 libcurl4 amd64 7.58.0-2ubuntu3.14 [219 kB]

Fetched 382 kB in 0s (1966 kB/s)

Selecting previously unselected package apt-transport-https.

(Reading database ... 30621 files and directories currently installed.)

Preparing to unpack .../apt-transport-https_1.6.14_all.deb ...

Unpacking apt-transport-https (1.6.14) ...

Preparing to unpack .../curl_7.58.0-2ubuntu3.14_amd64.deb ...

Unpacking curl (7.58.0-2ubuntu3.14) over (7.58.0-2ubuntu3.13) ...

Preparing to unpack .../libcurl4_7.58.0-2ubuntu3.14_amd64.deb ...

Unpacking libcurl4:amd64 (7.58.0-2ubuntu3.14) over (7.58.0-2ubuntu3.13) ...

Setting up apt-transport-https (1.6.14) ...

Setting up libcurl4:amd64 (7.58.0-2ubuntu3.14) ...

Setting up curl (7.58.0-2ubuntu3.14) ...

Processing triggers for man-db (2.8.3-2ubuntu0.1) ...

Processing triggers for libc-bin (2.27-3ubuntu1.4) ...

root@ssl0:~# curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

root@ssl0:~# echo \

>   "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \

>   $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

root@ssl0:~# apt-get update

Hit:1 http://archive.canonical.com/ubuntu bionic InRelease

Hit:2 http://archive.ubuntu.com/ubuntu bionic InRelease

Get:3 http://archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]

Get:4 https://download.docker.com/linux/ubuntu bionic InRelease [64.4 kB]

Get:5 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]

Get:6 https://download.docker.com/linux/ubuntu bionic/stable amd64 Packages [19.1 kB]

Get:7 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages [2160 kB]

Get:8 http://archive.ubuntu.com/ubuntu bionic-updates/restricted amd64 Packages [413 kB]

Get:9 http://archive.ubuntu.com/ubuntu bionic-updates/restricted Translation-en [56.0 kB]

Get:10 http://archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages [1743 kB]

Get:11 http://archive.ubuntu.com/ubuntu bionic-updates/universe Translation-en [373 kB]

Get:12 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages [1814 kB]

Get:13 http://security.ubuntu.com/ubuntu bionic-security/restricted amd64 Packages [389 kB]

Get:14 http://security.ubuntu.com/ubuntu bionic-security/restricted Translation-en [52.3 kB]

Get:15 http://security.ubuntu.com/ubuntu bionic-security/universe amd64 Packages [1132 kB]

Get:16 http://security.ubuntu.com/ubuntu bionic-security/multiverse amd64 Packages [20.9 kB]

Get:17 http://security.ubuntu.com/ubuntu bionic-security/multiverse Translation-en [4732 B]

Fetched 8420 kB in 3s (3283 kB/s)

Reading package lists... Done

root@ssl0:~# apt-get install docker-ce docker-ce-cli containerd.io

Reading package lists... Done

Building dependency tree

Reading state information... Done

The following additional packages will be installed:

  apparmor docker-ce-rootless-extras docker-scan-plugin pigz

Suggested packages:

  apparmor-profiles-extra apparmor-utils aufs-tools cgroupfs-mount | cgroup-lite

Recommended packages:

  slirp4netns

The following NEW packages will be installed:

  apparmor containerd.io docker-ce docker-ce-cli docker-ce-rootless-extras docker-scan-plugin pigz

0 upgraded, 7 newly installed, 0 to remove and 37 not upgraded.

Need to get 104 MB of archives.

After this operation, 450 MB of additional disk space will be used.

Do you want to continue? [Y/n] y

Get:1 http://archive.ubuntu.com/ubuntu bionic/universe amd64 pigz amd64 2.4-1 [57.4 kB]

Get:2 https://download.docker.com/linux/ubuntu bionic/stable amd64 containerd.io amd64 1.4.8-1 [24.7 MB]

Get:3 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 apparmor amd64 2.12-4ubuntu5.1 [487 kB]

Get:4 https://download.docker.com/linux/ubuntu bionic/stable amd64 docker-ce-cli amd64 5:20.10.7~3-0~ubuntu-bionic [41.4 MB]

Get:5 https://download.docker.com/linux/ubuntu bionic/stable amd64 docker-ce amd64 5:20.10.7~3-0~ubuntu-bionic [24.8 MB]

Get:6 https://download.docker.com/linux/ubuntu bionic/stable amd64 docker-ce-rootless-extras amd64 5:20.10.7~3-0~ubuntu-bionic [9061 kB]

Get:7 https://download.docker.com/linux/ubuntu bionic/stable amd64 docker-scan-plugin amd64 0.8.0~ubuntu-bionic [3888 kB]

Fetched 104 MB in 9s (11.9 MB/s)

Preconfiguring packages ...

Selecting previously unselected package pigz.

(Reading database ... 30625 files and directories currently installed.)

Preparing to unpack .../0-pigz_2.4-1_amd64.deb ...

Unpacking pigz (2.4-1) ...

Selecting previously unselected package apparmor.

Preparing to unpack .../1-apparmor_2.12-4ubuntu5.1_amd64.deb ...

Unpacking apparmor (2.12-4ubuntu5.1) ...

Selecting previously unselected package containerd.io.

Preparing to unpack .../2-containerd.io_1.4.8-1_amd64.deb ...

Unpacking containerd.io (1.4.8-1) ...

Selecting previously unselected package docker-ce-cli.

Preparing to unpack .../3-docker-ce-cli_5%3a20.10.7~3-0~ubuntu-bionic_amd64.deb ...

Unpacking docker-ce-cli (5:20.10.7~3-0~ubuntu-bionic) ...

Selecting previously unselected package docker-ce.

Preparing to unpack .../4-docker-ce_5%3a20.10.7~3-0~ubuntu-bionic_amd64.deb ...

Unpacking docker-ce (5:20.10.7~3-0~ubuntu-bionic) ...

Selecting previously unselected package docker-ce-rootless-extras.

Preparing to unpack .../5-docker-ce-rootless-extras_5%3a20.10.7~3-0~ubuntu-bionic_amd64.deb ...

Unpacking docker-ce-rootless-extras (5:20.10.7~3-0~ubuntu-bionic) ...

Selecting previously unselected package docker-scan-plugin.

Preparing to unpack .../6-docker-scan-plugin_0.8.0~ubuntu-bionic_amd64.deb ...

Unpacking docker-scan-plugin (0.8.0~ubuntu-bionic) ...

Setting up containerd.io (1.4.8-1) ...

Created symlink /etc/systemd/system/multi-user.target.wants/containerd.service → /lib/systemd/system/containerd.service.

Setting up docker-ce-rootless-extras (5:20.10.7~3-0~ubuntu-bionic) ...

Setting up docker-scan-plugin (0.8.0~ubuntu-bionic) ...

Setting up apparmor (2.12-4ubuntu5.1) ...

Created symlink /etc/systemd/system/sysinit.target.wants/apparmor.service → /lib/systemd/system/apparmor.service.

Setting up docker-ce-cli (5:20.10.7~3-0~ubuntu-bionic) ...

Setting up pigz (2.4-1) ...

Setting up docker-ce (5:20.10.7~3-0~ubuntu-bionic) ...

Created symlink /etc/systemd/system/multi-user.target.wants/docker.service → /lib/systemd/system/docker.service.

Created symlink /etc/systemd/system/sockets.target.wants/docker.socket → /lib/systemd/system/docker.socket.

Processing triggers for man-db (2.8.3-2ubuntu0.1) ...

Processing triggers for systemd (237-3ubuntu10.47) ...

root@ssl0:~# docker -v

Docker version 20.10.7, build f0df350

 

 

Fonte: https://docs.docker.com/engine/install/ubuntu/