Erro na instalação do docker-ce no Debian

Question

Estou com problemas ao instalar a janela de encaixe no meu servidor:

    user@server:/# apt-get install docker-ce
    Reading package lists... Done
    Building dependency tree
    Reading state information... Done
    The following NEW packages will be installed:
      docker-ce
    0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
    Need to get 0 B/30.2 MB of archives.
    After this operation, 152 MB of additional disk space will be used.
    debconf: unable to initialize frontend: Dialog
    debconf: (No usable dialog-like program is installed, so the dialog based frontend cannot be used. at /usr/share/perl5/Debconf/FrontEnd/Dialog.pm line 76, <> line 1.)
    debconf: falling back to frontend: Readline
    Selecting previously unselected package docker-ce.
    (Reading database ... 25607 files and directories currently installed.)
    Preparing to unpack .../docker-ce_17.12.0~ce-0~debian_amd64.deb ...
    Unpacking docker-ce (17.12.0~ce-0~debian) ...
    Processing triggers for systemd (215-17+deb8u7) ...
    Setting up docker-ce (17.12.0~ce-0~debian) ...
    Job for docker.service failed. See 'systemctl status docker.service' and 'journalctl -xn' for details.
    invoke-rc.d: initscript docker, action "start" failed.
    dpkg: error processing package docker-ce (--configure):
     subprocess installed post-installation script returned error exit status 1
    Processing triggers for systemd (215-17+deb8u7) ...
    Errors were encountered while processing:
     docker-ce
    E: Sub-process /usr/bin/dpkg returned an error code (1)
    user@server:/# journalctl -xn
    -- Logs begin at Thu 2018-02-15 11:45:24 CET, end at Thu 2018-02-15 12:05:46 CET. --
    Feb 15 12:05:46 git systemd[1]: Unit docker.service entered failed state.
    Feb 15 12:05:46 git systemd[1]: docker.service holdoff time over, scheduling restart.
    Feb 15 12:05:46 git systemd[1]: Stopping Docker Application Container Engine...
    -- Subject: Unit docker.service has begun shutting down
    -- Defined-By: systemd
    -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
    --
    -- Unit docker.service has begun shutting down.
    Feb 15 12:05:46 git systemd[1]: Stopping Docker Socket for the API.
    -- Subject: Unit docker.socket has begun shutting down
    -- Defined-By: systemd
    -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
    --
    -- Unit docker.socket has begun shutting down.
    Feb 15 12:05:46 git systemd[1]: Starting Docker Socket for the API.
    -- Subject: Unit docker.socket has begun with start-up
    -- Defined-By: systemd
    -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
    --
    -- Unit docker.socket has begun starting up.
    Feb 15 12:05:46 git systemd[1]: Listening on Docker Socket for the API.
    -- Subject: Unit docker.socket has finished start-up
    -- Defined-By: systemd
    -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
    --
    -- Unit docker.socket has finished starting up.
    --
    -- The start-up result is done.
    Feb 15 12:05:46 git systemd[1]: Starting Docker Application Container Engine...
    -- Subject: Unit docker.service has begun with start-up
    -- Defined-By: systemd
    -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
    --
    -- Unit docker.service has begun starting up.
    Feb 15 12:05:46 git systemd[1]: docker.service start request repeated too quickly, refusing to start.
    Feb 15 12:05:46 git systemd[1]: Failed to start Docker Application Container Engine.
    -- Subject: Unit docker.service has failed
    -- Defined-By: systemd
    -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
    --
    -- Unit docker.service has failed.
    --
    -- The result is failed.
    Feb 15 12:05:46 git systemd[1]: Unit docker.service entered failed state.

SysInfo:

PRETTY_NAME="Debian GNU/Linux 8 (jessie)"
NAME="Debian GNU/Linux"
VERSION_ID="8"
VERSION="8 (jessie)"
ID=debian

Kernel:

2.6.32-042stab127.2

    

Answer 1

De documentação de instalação do Docker o kernel mínimo requerido é 3.10 e você está rodando um 2.6.32-042stab127.2 com o Debian 8 que normalmente roda 3.16.

Parece ser um kernel OpenVZ. A partir de sua página principal , já é uma virtualização baseada em contêiner. Então, isso significaria executar um contêiner em um contêiner. Embora isso seja possível, existem limitações, especialmente para um aplicativo como o Docker que é feito para executar e controlar contêineres.

Esses são dois motivos que tornam o ambiente inaceitável para executar o Docker. Você deve tentar com um provedor usando virtualização mais comum. Se você pode escolher o seu kernel (mesmo entre uma lista fornecida) ou alterá-lo, essa deve ser uma escolha adequada. É claro que o bare metal também é uma escolha adequada.