Creando redes

# editar contenido Dockerfile
FROM ubuntu

RUN apt-get update && apt-get install net-tools iputils-ping -y

# generar imagen usando Dockerfile
docker image build -t ubuntu-tools .
# salida
Sending build context to Docker daemon  2.048kB
Step 1/2 : FROM ubuntu
 ---> 72300a873c2c
Step 2/2 : RUN apt-get update && apt-get install net-tools iputils-ping -y
 ---> Running in a24f7101eaef
Get:1 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
Get:2 http://archive.ubuntu.com/ubuntu bionic InRelease [242 kB]
...
Fetched 17.6 MB in 2min 6s (139 kB/s)
Reading package lists...
Reading package lists...
Building dependency tree...
Reading state information...
The following additional packages will be installed:
  libcap2 libcap2-bin libidn11 libpam-cap
The following NEW packages will be installed:
  iputils-ping libcap2 libcap2-bin libidn11 libpam-cap net-tools
0 upgraded, 6 newly installed, 0 to remove and 0 not upgraded.
Need to get 336 kB of archives.
After this operation, 1339 kB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu bionic/main amd64 libcap2 amd64 1:2.25-1.2 [13.0 kB]
...
debconf: delaying package configuration, since apt-utils is not installed
Fetched 336 kB in 3s (97.5 kB/s)
Selecting previously unselected package libcap2:amd64.
(Reading database ... 4046 files and directories currently installed.)
Preparing to unpack .../0-libcap2_1%3a2.25-1.2_amd64.deb ...
Unpacking libcap2:amd64 (1:2.25-1.2) ...
Selecting previously unselected package libidn11:amd64.
Preparing to unpack .../1-libidn11_1.33-2.1ubuntu1.2_amd64.deb ...
Unpacking libidn11:amd64 (1.33-2.1ubuntu1.2) ...
Selecting previously unselected package iputils-ping.
Preparing to unpack .../2-iputils-ping_3%3a20161105-1ubuntu3_amd64.deb ...
Unpacking iputils-ping (3:20161105-1ubuntu3) ...
Selecting previously unselected package libcap2-bin.
Preparing to unpack .../3-libcap2-bin_1%3a2.25-1.2_amd64.deb ...
Unpacking libcap2-bin (1:2.25-1.2) ...
Selecting previously unselected package libpam-cap:amd64.
Preparing to unpack .../4-libpam-cap_1%3a2.25-1.2_amd64.deb ...
Unpacking libpam-cap:amd64 (1:2.25-1.2) ...
Selecting previously unselected package net-tools.
Preparing to unpack .../5-net-tools_1.60+git20161116.90da8a0-1ubuntu1_amd64.deb ...
Unpacking net-tools (1.60+git20161116.90da8a0-1ubuntu1) ...
Setting up libcap2:amd64 (1:2.25-1.2) ...
Setting up net-tools (1.60+git20161116.90da8a0-1ubuntu1) ...
Setting up libidn11:amd64 (1.33-2.1ubuntu1.2) ...
Setting up iputils-ping (3:20161105-1ubuntu3) ...
Setting up libpam-cap:amd64 (1:2.25-1.2) ...
debconf: unable to initialize frontend: Dialog
debconf: (TERM is not set, so the dialog frontend is not usable.)
debconf: falling back to frontend: Readline
debconf: unable to initialize frontend: Readline
Setting up libcap2-bin (1:2.25-1.2) ...
Processing triggers for libc-bin (2.27-3ubuntu1) ...
Removing intermediate container a24f7101eaef
 ---> 6c0352412a2f
Successfully built 6c0352412a2f
Successfully tagged ubuntu-tools:latest

# crear nueva red a usar al generar contenedor de la imagen
# ver ayuda
docker network create --help

Usage:    docker network create [OPTIONS] NETWORK

Create a network

Options:
      --attachable           Enable manual container attachment
      --aux-address map      Auxiliary IPv4 or IPv6 addresses used by Network driver (default map[])
      --config-from string   The network from which copying the configuration
      --config-only          Create a configuration only network
  -d, --driver string        Driver to manage the Network (default "bridge")
      --gateway strings      IPv4 or IPv6 Gateway for the master subnet
      --ingress              Create swarm routing-mesh network
      --internal             Restrict external access to the network
      --ip-range strings     Allocate container ip from a sub-range
      --ipam-driver string   IP Address Management Driver (default "default")
      --ipam-opt map         Set IPAM driver specific options (default map[])
      --ipv6                 Enable IPv6 networking
      --label list           Set metadata on a network
  -o, --opt map              Set driver specific options (default map[])
      --scope string         Control the networks scope
      --subnet strings       Subnet in CIDR format that represents a network segment

# sentencia de comando para crear red con flag -d (driver de red)
docker network create -d bridge br0
8e9c2463ce18fa0e9e653e46ed728f031205d94973d8a428953cd1c606099abe
# inspeccionar nueva red
docker network inspect br0
[
    {
        "Name": "br0",
        "Id": "8e9c2463ce18fa0e9e653e46ed728f031205d94973d8a428953cd1c606099abe",
        "Created": "2020-03-09T20:38:31.624165412-06:00",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": {},
            "Config": [
                {
                    "Subnet": "172.22.0.0/16",
                    "Gateway": "172.22.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {},
        "Options": {},
        "Labels": {}
    }
]

  • Agregar contenedor a red de imagen previa

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