Статьи

Создайте свой собственный образ Docker (Tech Tip # 57)

Февраль 3, 2019

Docker упрощает доставку программного обеспечения, позволяя легко создавать и обмениваться изображениями, которые содержат всю среду вашего приложения, то есть операционную систему, JDK, базу данных, файл WAR, особую настройку, требуемую для вашего приложения, и т. Д.

Есть три основных компонента Docker:

  • Образы Docker являются «компонентом сборки» — доступным только для чтения шаблоном операционной системы приложения.
  • Контейнеры являются «компонентом запуска» — представлением времени выполнения, созданным из изображений.
  • Реестр является «компонентом распространения» — местом для хранения и распространения изображений.

Несколько проектов JBoss доступны в виде изображений Docker на сайте www.jboss.org/docker . Технический совет № 39 объяснил, как начать работу с Docker на Mac. Также объясняется, как запустить официальное изображение WildFly Docker .

Изображение Docker состоит из нескольких слоев, каждый из которых обеспечивает определенную функциональность, и более высокий уровень может добавить функциональность поверх него. Например, Docker монтирует корневую файловую систему как слой только для чтения, а затем добавляет слой чтения-записи поверх него. Все эти слои объединяются с помощью Union Mount для обеспечения операционной среды приложения.

Полная история создания образа WildFly может быть представлена ​​как:

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docker history --no-trunc=true jboss/wildfly
IMAGE                                                              CREATED             CREATED BY                                                                                                                                                                   SIZE
365390553f925f96f8c00f79525ad101847de7781bb4fec23b1188f25fe99a6a   3 weeks ago         /bin/sh -c #(nop) CMD [/opt/jboss/wildfly/bin/standalone.sh -b 0.0.0.0]                                                                                                      0 B
d7fccab36b8f5a324ef8dd017c8964f2de7839379503021f15502ba3f0b908bd   3 weeks ago         /bin/sh -c #(nop) EXPOSE map[8080/tcp:{} 9990/tcp:{}]                                                                                                                        0 B
184d6d02f340455d33d226d6467484027d0763964a586ae9ada1782262299a74   3 weeks ago         /bin/sh -c #(nop) ENV JBOSS_HOME=/opt/jboss/wildfly                                                                                                                          0 B
57ada25ecdd03191355ec1c8f5f1a4e05b3e152709c9b603d5ed5fb0c4d53853   3 weeks ago         /bin/sh -c cd $HOME && curl http://download.jboss.org/wildfly/$WILDFLY_VERSION/wildfly-$WILDFLY_VERSION.tar.gz | tar zx && mv $HOME/wildfly-$WILDFLY_VERSION $HOME/wildfly   135 MB
59ec65b61fba2b6ada099abe3a9a30d05ffb71370b43dfbd0208fd4f5a34c005   3 weeks ago         /bin/sh -c #(nop) ENV WILDFLY_VERSION=8.1.0.Final                                                                                                                            0 B
90832e1f0bb9e9f98ecd42f6df6b124c1e6768babaddc23d646cd75c7b2fddec   5 weeks ago         /bin/sh -c #(nop) ENV JAVA_HOME=/usr/lib/jvm/java                                                                                                                            0 B
72d585299bb5c5c1c326422cfffadc93d8bb4020f35bf072b2d91d287967807a   5 weeks ago         /bin/sh -c #(nop) USER jboss                                                                                                                                                 0 B
e02bdb6c4ed5436da02c958d302af5f06c1ebb1821791f60d45e190ebb55130f   5 weeks ago         /bin/sh -c yum -y install java-1.7.0-openjdk-devel && yum clean all                                                                                                          217.2 MB
b17a20d6f5f8e7ed0a1dba277acd3f854c531b0476b03d63a8f0df4caf78c763   5 weeks ago         /bin/sh -c #(nop) USER root                                                                                                                                                  0 B
7759146eab1a3aa5ba5ed12483d03e64a6bf1061a383d5713a5e21fc40554457   5 weeks ago         /bin/sh -c #(nop) MAINTAINER Marek Goldmann <mgoldman@redhat.com>                                                                                                            0 B
2ea8562cac7c25a308b4565b66d4f7e11a1d2137a599ef2b32ed23c78f0a0378   5 weeks ago         /bin/sh -c #(nop) USER jboss                                                                                                                                                 0 B
4d37cbbfc67dd508e682a5431a99d8c1feba1bd8352ffd3ea794463d9cfa81cc   5 weeks ago         /bin/sh -c #(nop) WORKDIR /opt/jboss                                                                                                                                         0 B
379edb00ab0764276787ea777243990da697f2f93acb5d9166ff73ad01511a87   5 weeks ago         /bin/sh -c groupadd -r jboss -g 1000 && useradd -u 1000 -r -g jboss -m -d /opt/jboss -s /sbin/nologin -c "JBoss user" jboss                                                  295 kB
cd5bb934bb6755e910d19ac3ae4cfd09221aa2f98c3fbb51a7486991364dc1ae   5 weeks ago         /bin/sh -c yum -y install xmlstarlet saxon augeas bsdtar unzip && yum clean all                                                                                              21.35 MB
20a1abe1d9bfb9b1e46d5411abd5a38b6104a323b7c4fb5c0f1f161b8f7278c2   5 weeks ago         /bin/sh -c yum -y update && yum clean all                                                                                                                                    200.7 MB
1ef0a50fe8b1394d3626a7624a58b58cff9560ddb503743099a56bbe95ab481a   5 weeks ago         /bin/sh -c #(nop) MAINTAINER Marek Goldmann <mgoldman@redhat.com>                                                                                                            0 B
7d3f07f8de5fb3a20c6cb1e4447773a5741e3641c1aa093366eaa0fc690c6417   7 weeks ago         /bin/sh -c #(nop) ADD file:285fdeab65d637727f6b79392a309135494d2e6046c6cc2fbd2f23e43eaac69c in /                                                                             374.1 MB
782cf93a8f16d3016dae352188cd5cfedb6a15c37d4dbd704399f02d1bb89dab   7 weeks ago         /bin/sh -c #(nop) MAINTAINER Lokesh Mandvekar <lsm5@fedoraproject.org> - ./buildcontainers.sh                                                                                0 B
511136ea3c5a64f264b78b5433614aec563103b4d4702f3ba7d4d2698e22c158   17 months ago                                                                                                                                                                                    0 B
</lsm5@fedoraproject.org></mgoldman@redhat.com></mgoldman@redhat.com>

Точная команда, выданная на каждом слое, указана в этом выводе Если вы перейдете в крайнее правое положение, то вы также сможете увидеть общее пространство, занимаемое каждым слоем. Например, Fedora используется в качестве базового образа и потребляет ~ 574 МБ всего образа, Open JDK 7 занимает 217,5 МБ, а WildFly — 135 МБ.

Образы Docker создаются путем чтения инструкций из Dockerfile . Это текстовый файл, содержащий все команды в порядке, необходимом для построения заданного изображения. Он придерживается определенного формата и использует определенный набор инструкций. Словарный запас команд довольно ограничен, но хорошо служит цели. Образ можно построить, дав команду docker build . Docker Tutorial содержит подробные инструкции о том, как создать свой собственный образ.

Официальный образ WildFly Docker построен с использованием Fedora 20 в качестве базовой операционной системы. Dockerfile можно увидеть по адресу github.com/jboss-dockerfiles/wildfly/blob/master/Dockerfile . Он использует jboss / base-jdk: 7 в качестве базового образа, который использует jboss / base в качестве базового образа. Dockerfile из jboss / base показывает, что в качестве базового образа используется Fedora 20.

Альтернативой является создание этого образа с использованием CentOS или Ubuntu в качестве базового образа. Dockerfile для этих изображений доступны по адресу github.com/arun-gupta/docker-images/ .

Запуск boot2docker показывает вывод как:

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bash
unset DYLD_LIBRARY_PATH ; unset LD_LIBRARY_PATH
mkdir -p ~/.boot2docker
if [ ! -f ~/.boot2docker/boot2docker.iso ]; then cp /usr/local/share/boot2docker/boot2docker.iso ~/.boot2docker/ ; fi
/usr/local/bin/boot2docker init
/usr/local/bin/boot2docker up
$(/usr/local/bin/boot2docker shellinit)
docker version
Last login: Mon Nov 24 11:03:33 on ttys006
hello arungupta
~> bash
~> unset DYLD_LIBRARY_PATH ; unset LD_LIBRARY_PATH
~> mkdir -p ~/.boot2docker
~> if [ ! -f ~/.boot2docker/boot2docker.iso ]; then cp /usr/local/share/boot2docker/boot2docker.iso ~/.boot2docker/ ; fi
~> /usr/local/bin/boot2docker init
Virtual machine boot2docker-vm already exists
~> /usr/local/bin/boot2docker up
Waiting for VM and Docker daemon to start...
.....................ooooooooooooooooo
Started.
Writing /Users/arungupta/.boot2docker/certs/boot2docker-vm/ca.pem
Writing /Users/arungupta/.boot2docker/certs/boot2docker-vm/cert.pem
Writing /Users/arungupta/.boot2docker/certs/boot2docker-vm/key.pem
 
To connect the Docker client to the Docker daemon, please set:
    export DOCKER_HOST=tcp://192.168.59.103:2376
    export DOCKER_CERT_PATH=/Users/arungupta/.boot2docker/certs/boot2docker-vm
    export DOCKER_TLS_VERIFY=1
 
~> $(/usr/local/bin/boot2docker shellinit)
Writing /Users/arungupta/.boot2docker/certs/boot2docker-vm/ca.pem
Writing /Users/arungupta/.boot2docker/certs/boot2docker-vm/cert.pem
Writing /Users/arungupta/.boot2docker/certs/boot2docker-vm/key.pem
~> docker version
Client version: 1.3.1
Client API version: 1.15
Go version (client): go1.3.3
Git commit (client): 4e9bbfa
OS/Arch (client): darwin/amd64
Server version: 1.3.1
Server API version: 1.15
Go version (server): go1.3.3
Git commit (server): 4e9bbfa

Затем вы можете создать образ WildFly Docker на базе CentOS, как показано ниже. Обратите внимание, что эта команда дана из каталога «wildfly-centos» на github.com/arun-gupta/docker-images/ . Итак, файл Dockerfile находится по адресу github.com/arun-gupta/docker-images/blob/master/wildfly-centos/Dockerfile .

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wildfly-centos> docker build -t wildfly-centos .
Sending build context to Docker daemon 4.096 kB
Sending build context to Docker daemon
Step 0 : FROM centos
centos:latest: The image you are pulling has been verified
511136ea3c5a: Pull complete
5b12ef8fd570: Pull complete
ae0c2d0bdc10: Pull complete
Status: Downloaded newer image for centos:latest
 ---> ae0c2d0bdc10
Step 1 : MAINTAINER Arun Gupta <arungupta@redhat.com>
 ---> Running in 7fc52653d381
 ---> e490dfcb3685
Removing intermediate container 7fc52653d381
Step 2 : RUN yum -y update && yum clean all
 ---> Running in 90de23c9dde7
Loaded plugins: fastestmirror
Determining fastest mirrors
 * base: mirror.cc.columbia.edu
 * extras: centos.mirror.ndchost.com
 * updates: centos-distro.cavecreek.net
Resolving Dependencies
--> Running transaction check
---> Package tzdata.noarch 0:2014h-1.el7 will be updated
---> Package tzdata.noarch 0:2014j-1.el7_0 will be an update
--> Finished Dependency Resolution
 
Dependencies Resolved
 
================================================================================
 Package         Arch            Version                 Repository        Size
================================================================================
Updating:
 tzdata          noarch          2014j-1.el7_0           updates          434 k
 
Transaction Summary
================================================================================
Upgrade  1 Package
 
Total download size: 434 k
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
warning: /var/cache/yum/x86_64/7/updates/packages/tzdata-2014j-1.el7_0.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Public key for tzdata-2014j-1.el7_0.noarch.rpm is not installed
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) <[email protected]>"
 Fingerprint: 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5
 Package    : centos-release-7-0.1406.el7.centos.2.5.x86_64 (@Updates/$releasever)
 From       : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Updating   : tzdata-2014j-1.el7_0.noarch                                  1/2
  Cleanup    : tzdata-2014h-1.el7.noarch                                    2/2
  Verifying  : tzdata-2014j-1.el7_0.noarch                                  1/2
  Verifying  : tzdata-2014h-1.el7.noarch                                    2/2
 
Updated:
  tzdata.noarch 0:2014j-1.el7_0                                                
 
Complete!
Loaded plugins: fastestmirror
Cleaning repos: base extras updates
Cleaning up everything
Cleaning up list of fastest mirrors
 ---> f212cb9dbcf5
Removing intermediate container 90de23c9dde7
Step 3 : RUN yum -y install xmlstarlet saxon augeas bsdtar unzip && yum clean all
 ---> Running in d4bd822933c8
Loaded plugins: fastestmirror
Determining fastest mirrors
 * base: mirror-centos.hostingswift.com
 * extras: mirror.keystealth.org
 * updates: mirrors.advancedhosters.com
No package xmlstarlet available.
Resolving Dependencies
--> Running transaction check
---> Package augeas.x86_64 0:1.1.0-12.el7 will be installed
--> Processing Dependency: augeas-libs = 1.1.0-12.el7 for package: augeas-1.1.0-12.el7.x86_64
 
. . .
 
--> Processing Dependency: python-lxml for package: python-javapackages-3.4.1-6.el7_0.noarch
--> Running transaction check
---> Package python-lxml.x86_64 0:3.2.1-4.el7 will be installed
--> Finished Dependency Resolution
 
Dependencies Resolved
 
================================================================================
 Package                  Arch        Version                Repository    Size
================================================================================
Installing:
 augeas                   x86_64      1.1.0-12.el7           base          35 k
 bsdtar                   x86_64      3.1.2-7.el7            base          55 k
 
. . .
 
 python-javapackages      noarch      3.4.1-6.el7_0          updates       31 k
 python-lxml              x86_64      3.2.1-4.el7            base         758 k
 
Transaction Summary
================================================================================
Install  4 Packages (+9 Dependent packages)
 
Total download size: 4.2 M
Installed size: 8.0 M
Downloading packages:
--------------------------------------------------------------------------------
Total                                              188 kB/s | 4.2 MB  00:22    
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : lzo-2.06-6.el7_0.2.x86_64                                   1/13
  Installing : libxslt-1.1.28-5.el7.x86_64                                
 
. . .
 
  Installing : unzip-6.0-13.el7.x86_64                                    13/13
  Verifying  : augeas-1.1.0-12.el7.x86_64                                  1/13
 
. . .
 
  Verifying  : javapackages-tools-3.4.1-6.el7_0.noarch                    13/13
 
Installed:
  augeas.x86_64 0:1.1.0-12.el7            bsdtar.x86_64 0:3.1.2-7.el7         
  saxon.noarch 0:9.3.0.4-11.el7           unzip.x86_64 0:6.0-13.el7           
 
Dependency Installed:
  augeas-libs.x86_64 0:1.1.0-12.el7  bea-stax.noarch 0:1.2.0-9.el7             
  bea-stax-api.noarch 0:1.2.0-9.el7  javapackages-tools.noarch 0:3.4.1-6.el7_0 
  libarchive.x86_64 0:3.1.2-7.el7    libxslt.x86_64 0:1.1.28-5.el7             
  lzo.x86_64 0:2.06-6.el7_0.2        python-javapackages.noarch 0:3.4.1-6.el7_0
  python-lxml.x86_64 0:3.2.1-4.el7 
 
Complete!
Loaded plugins: fastestmirror
Cleaning repos: base extras updates
Cleaning up everything
Cleaning up list of fastest mirrors
 ---> 28b11e6151f0
Removing intermediate container d4bd822933c8
Step 4 : RUN groupadd -r jboss -g 1000 && useradd -u 1000 -r -g jboss -m -d /opt/jboss -s /sbin/nologin -c "JBoss user" jboss
 ---> Running in 943c20ba5a51
 ---> 73603eab89b7
Removing intermediate container 943c20ba5a51
Step 5 : WORKDIR /opt/jboss
 ---> Running in 29c865c3109c
 ---> 9a661ae4341b
Removing intermediate container 29c865c3109c
Step 6 : USER jboss
 ---> Running in 7dfd8416ae2c
 ---> 6265153611c7
Removing intermediate container 7dfd8416ae2c
Step 7 : USER root
 ---> Running in a72588fba840
 ---> 12ed28a7acb7
Removing intermediate container a72588fba840
Step 8 : RUN yum -y install java-1.7.0-openjdk-devel && yum clean all
 ---> Running in 4efb3e17eb38
Loaded plugins: fastestmirror
Determining fastest mirrors
 * base: mirror.trouble-free.net
 * extras: centos.mirror.ndchost.com
 * updates: centos-distro.cavecreek.net
Resolving Dependencies
--> Running transaction check
---> Package java-1.7.0-openjdk-devel.x86_64 1:1.7.0.71-2.5.3.1.el7_0 will be installed
 
. . .
 
---> Package hwdata.noarch 0:0.252-7.3.el7 will be installed
--> Finished Dependency Resolution
 
Dependencies Resolved
 
================================================================================
 Package                      Arch    Version                    Repository
                                                                           Size
================================================================================
Installing:
 java-1.7.0-openjdk-devel     x86_64  1:1.7.0.71-2.5.3.1.el7_0   updates  9.2 M
Installing for dependencies:
 alsa-lib                     x86_64  1.0.27.2-3.el7             base     389 k
 
. . .
 
144 k
 xorg-x11-font-utils          x86_64  1:7.5-18.1.el7             base      87 k
 xorg-x11-fonts-Type1         noarch  7.5-9.el7                  base     521 k
 
Transaction Summary
================================================================================
Install  1 Package (+73 Dependent packages)
 
Total download size: 49 M
Installed size: 181 M
Downloading packages:
--------------------------------------------------------------------------------
Total                                              1.7 MB/s |  49 MB  00:29    
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : freetype-2.4.11-9.el7.x86_64                                1/74
  Installing : libjpeg-turbo-1.2.90-5.el7.x86_64                           2/74
 
. . .
 
73/74
  Installing : 1:java-1.7.0-openjdk-devel-1.7.0.71-2.5.3.1.el7_0.x86_64   74/74
  Verifying  : libsndfile-1.0.25-9.el7.x86_64                              1/74
  Verifying  : libXfont-1.4.7-2.el7_0.x86_64                               2/74
  Verifying  : kmod-14-9.el7.x86_64                                       
 
. . .
 
73/74
  Verifying  : gdk-pixbuf2-2.28.2-4.el7.x86_64                            74/74
 
Installed:
  java-1.7.0-openjdk-devel.x86_64 1:1.7.0.71-2.5.3.1.el7_0                     
 
Dependency Installed:
  alsa-lib.x86_64 0:1.0.27.2-3.el7                                             
  atk.x86_64 0:2.8.0-4.el7                                                     
 
. . .
                                           
  xorg-x11-font-utils.x86_64 1:7.5-18.1.el7                                    
  xorg-x11-fonts-Type1.noarch 0:7.5-9.el7                                      
 
Complete!
Loaded plugins: fastestmirror
Cleaning repos: base extras updates
Cleaning up everything
Cleaning up list of fastest mirrors
 ---> 44c4bb92fa11
Removing intermediate container 4efb3e17eb38
Step 9 : USER jboss
 ---> Running in 824d62c49182
 ---> 930cb2a860f7
Removing intermediate container 824d62c49182
Step 10 : ENV JAVA_HOME /usr/lib/jvm/java
 ---> Running in f19681365fe5
 ---> fff2c21b0a71
Removing intermediate container f19681365fe5
Step 11 : ENV WILDFLY_VERSION 8.2.0.Final
 ---> Running in cc9d42ece5c1
 ---> b7b7ca7a9172
Removing intermediate container cc9d42ece5c1
Step 12 : RUN cd $HOME && curl -O http://download.jboss.org/wildfly/$WILDFLY_VERSION/wildfly-$WILDFLY_VERSION.zip && unzip wildfly-$WILDFLY_VERSION.zip && mv $HOME/wildfly-$WILDFLY_VERSION $HOME/wildfly && rm wildfly-$WILDFLY_VERSION.zip
 ---> Running in 28e92a1b304f
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  126M  100  126M    0     0   813k      0  0:02:38  0:02:38 --:--:--  644k
Archive:  wildfly-8.2.0.Final.zip
   creating: wildfly-8.2.0.Final/
   creating: wildfly-8.2.0.Final/.installation/
   creating: wildfly-8.2.0.Final/appclient/
   creating: wildfly-8.2.0.Final/appclient/configuration/
   creating: wildfly-8.2.0.Final/bin/
 
. . .
 
  inflating: wildfly-8.2.0.Final/domain/configuration/application-users.properties 
  inflating: wildfly-8.2.0.Final/domain/configuration/mgmt-users.properties 
  inflating: wildfly-8.2.0.Final/standalone/configuration/application-users.properties 
  inflating: wildfly-8.2.0.Final/standalone/configuration/mgmt-users.properties 
   creating: wildfly-8.2.0.Final/domain/tmp/auth/
   creating: wildfly-8.2.0.Final/standalone/tmp/auth/
 ---> a1bc79a43c77
Removing intermediate container 28e92a1b304f
Step 13 : ENV JBOSS_HOME /opt/jboss/wildfly
 ---> Running in e3c995170046
 ---> d46fdd618d55
Removing intermediate container e3c995170046
Step 14 : EXPOSE 8080 9990
 ---> Running in d55d6a6f43cf
 ---> 6c17e2cefecf
Removing intermediate container d55d6a6f43cf
Step 15 : CMD /opt/jboss/wildfly/bin/standalone.sh -b 0.0.0.0
 ---> Running in 76e2630d16f5
 ---> 97c8780a7d6a
Removing intermediate container 76e2630d16f5
Successfully built 97c8780a7d6a

Список изображений Docker теперь можно увидеть как:

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wildfly-centos> docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
wildfly-centos      latest              97c8780a7d6a        58 seconds ago      619.6 MB
centos              latest              ae0c2d0bdc10        2 weeks ago         224 MB

Общий размер изображения составляет 619,6 МБ. Официальный образ WildFly Docker может быть установлен, как показано:

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wildfly-centos> docker pull jboss/wildfly
Pulling repository jboss/wildfly
365390553f92: Download complete
511136ea3c5a: Download complete
782cf93a8f16: Download complete
7d3f07f8de5f: Download complete
1ef0a50fe8b1: Download complete
20a1abe1d9bf: Download complete
cd5bb934bb67: Download complete
379edb00ab07: Download complete
4d37cbbfc67d: Download complete
2ea8562cac7c: Download complete
7759146eab1a: Download complete
b17a20d6f5f8: Download complete
e02bdb6c4ed5: Download complete
72d585299bb5: Download complete
90832e1f0bb9: Download complete
59ec65b61fba: Download complete
57ada25ecdd0: Download complete
184d6d02f340: Download complete
d7fccab36b8f: Download complete
Status: Downloaded newer image for jboss/wildfly:latest

И полный список образов Docker снова можно увидеть как:

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wildfly-centos> docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
wildfly-centos      latest              97c8780a7d6a        12 minutes ago      619.6 MB
centos              latest              ae0c2d0bdc10        2 weeks ago         224 MB
jboss/wildfly       latest              365390553f92        4 weeks ago         948.7 MB

Размер изображения в этом случае составляет 948,7 МБ. Детальное понимание этого изображения было объяснено ранее в этом блоге.

Образ WildFly на основе Ubuntu может быть собран и установлен, как показано ниже. Обратите внимание, что эта команда дана из каталога «wildfly-ubuntu» на github.com/arun-gupta/docker-images/ . Итак, файл Dockerfile находится по адресу github.com/arun-gupta/docker-images/blob/master/wildfly-ubuntu/Dockerfile .

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wildfly-ubuntu> docker build -t wildfly-ubuntu .
Sending build context to Docker daemon 4.096 kB
Sending build context to Docker daemon
Step 0 : FROM ubuntu
ubuntu:latest: The image you are pulling has been verified
d497ad3926c8: Pull complete
ccb62158e970: Pull complete
e791be0477f2: Pull complete
3680052c0f5c: Pull complete
22093c35d77b: Pull complete
5506de2b643b: Pull complete
511136ea3c5a: Already exists
Status: Downloaded newer image for ubuntu:latest
 ---> 5506de2b643b
Step 1 : MAINTAINER Arun Gupta <arungupta@redhat.com>
 ---> Running in cc444b436b26
 ---> 9df66d33d676
Removing intermediate container cc444b436b26
Step 2 : RUN apt-get update
 ---> Running in 3dc63c0f708a
Ign http://archive.ubuntu.com trusty InRelease
Ign http://archive.ubuntu.com trusty-updates InRelease
Ign http://archive.ubuntu.com trusty-security InRelease
Ign http://archive.ubuntu.com trusty-proposed InRelease
Get:1 http://archive.ubuntu.com trusty Release.gpg [933 B]
Get:2 http://archive.ubuntu.com trusty-updates Release.gpg [933 B]
Get:3 http://archive.ubuntu.com trusty-security Release.gpg [933 B]
Get:4 http://archive.ubuntu.com trusty-proposed Release.gpg [933 B]
Get:5 http://archive.ubuntu.com trusty Release [58.5 kB]
Get:6 http://archive.ubuntu.com trusty-updates Release [62.0 kB]
Get:7 http://archive.ubuntu.com trusty-security Release [62.0 kB]
Get:8 http://archive.ubuntu.com trusty-proposed Release [209 kB]
Get:9 http://archive.ubuntu.com trusty/main Sources [1335 kB]
Get:10 http://archive.ubuntu.com trusty/restricted Sources [5335 B]
Get:11 http://archive.ubuntu.com trusty/universe Sources [7926 kB]
Get:12 http://archive.ubuntu.com trusty/main amd64 Packages [1743 kB]
Get:13 http://archive.ubuntu.com trusty/restricted amd64 Packages [16.0 kB]
Get:14 http://archive.ubuntu.com trusty/universe amd64 Packages [7589 kB]
Get:15 http://archive.ubuntu.com trusty-updates/main Sources [179 kB]
Get:16 http://archive.ubuntu.com trusty-updates/restricted Sources [1250 B]
Get:17 http://archive.ubuntu.com trusty-updates/universe Sources [114 kB]
Get:18 http://archive.ubuntu.com trusty-updates/main amd64 Packages [465 kB]
Get:19 http://archive.ubuntu.com trusty-updates/restricted amd64 Packages [6341 B]
Get:20 http://archive.ubuntu.com trusty-updates/universe amd64 Packages [286 kB]
Get:21 http://archive.ubuntu.com trusty-security/main Sources [62.7 kB]
Get:22 http://archive.ubuntu.com trusty-security/restricted Sources [40 B]
Get:23 http://archive.ubuntu.com trusty-security/universe Sources [19.1 kB]
Get:24 http://archive.ubuntu.com trusty-security/main amd64 Packages [205 kB]
Get:25 http://archive.ubuntu.com trusty-security/restricted amd64 Packages [40 B]
Get:26 http://archive.ubuntu.com trusty-security/universe amd64 Packages [93.4 kB]
Get:27 http://archive.ubuntu.com trusty-proposed/main amd64 Packages [193 kB]
Get:28 http://archive.ubuntu.com trusty-proposed/restricted amd64 Packages [40 B]
Fetched 20.6 MB in 43s (469 kB/s)
Reading package lists...
 ---> 7fcaaf17b124
Removing intermediate container 3dc63c0f708a
Step 3 : RUN apt-get -y install xmlstarlet bsdtar unzip curl
 ---> Running in 81613b0e3b71
Reading package lists...
Building dependency tree...
Reading state information...
The following extra packages will be installed:
  ca-certificates krb5-locales libarchive13 libasn1-8-heimdal libcurl3
  libgssapi-krb5-2 libgssapi3-heimdal libhcrypto4-heimdal libheimbase1-heimdal
 
. . .
 
Updating certificates in /etc/ssl/certs... 164 added, 0 removed; done.
Running hooks in /etc/ca-certificates/update.d....done.
Processing triggers for sgml-base (1.26+nmu4ubuntu1) ...
 ---> 0d897d545547
Removing intermediate container 81613b0e3b71
Step 4 : RUN groupadd -r jboss -g 1000 && useradd -u 1000 -r -g jboss -m -d /opt/jboss -s /sbin/nologin -c "JBoss user" jboss
 ---> Running in bf31e0e1f448
 ---> 7494e71043c0
Removing intermediate container bf31e0e1f448
Step 5 : WORKDIR /opt/jboss
 ---> Running in 1ac355c74395
 ---> abbbb6aa6b71
Removing intermediate container 1ac355c74395
Step 6 : USER jboss
 ---> Running in a656007f6e6b
 ---> 657671b82d0f
Removing intermediate container a656007f6e6b
Step 7 : USER root
 ---> Running in f53138927d04
 ---> d3bd53152a51
Removing intermediate container f53138927d04
Step 8 : RUN apt-get -y install openjdk-7-jdk
 ---> Running in 1076b257c6f6
Reading package lists...
Building dependency tree...
Reading state information...
The following extra packages will be installed:
  acl at-spi2-core ca-certificates ca-certificates-java colord cpp cpp-4.8
  dbus dbus-x11 dconf-gsettings-backend dconf-service desktop-file-utils
 
. . .
 
Adding debian:Wells_Fargo_Root_CA.pem
Adding debian:XRamp_Global_CA_Root.pem
Adding debian:certSIGN_ROOT_CA.pem
Adding debian:ePKI_Root_Certification_Authority.pem
Adding debian:thawte_Primary_Root_CA.pem
Adding debian:thawte_Primary_Root_CA_-_G2.pem
Adding debian:thawte_Primary_Root_CA_-_G3.pem
Adding debian:spi-cacert-2008.pem
done.
done.
 ---> 558f23c93a8c
Removing intermediate container 1076b257c6f6
Step 9 : USER jboss
 ---> Running in 9d6955bcd19f
 ---> 7f16c426ccaf
Removing intermediate container 9d6955bcd19f
Step 10 : ENV JAVA_HOME /usr/lib/jvm/java-7-openjdk-amd64
 ---> Running in 66f22bd0de95
 ---> 6304f386c946
Removing intermediate container 66f22bd0de95
Step 11 : ENV WILDFLY_VERSION 8.2.0.Final
 ---> Running in 784e1533fa09
 ---> 1a5e1aeadc85
Removing intermediate container 784e1533fa09
Step 12 : RUN cd $HOME && curl -O http://download.jboss.org/wildfly/$WILDFLY_VERSION/wildfly-$WILDFLY_VERSION.zip && unzip wildfly-$WILDFLY_VERSION.zip && mv $HOME/wildfly-$WILDFLY_VERSION $HOME/wildfly && rm wildfly-$WILDFLY_VERSION.zip
 ---> Running in c7d808526af6
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  126M  100  126M    0     0   993k      0  0:02:09  0:02:09 --:--:--  870k
Archive:  wildfly-8.2.0.Final.zip
   creating: wildfly-8.2.0.Final/
 
. . .
 
  inflating: wildfly-8.2.0.Final/standalone/configuration/mgmt-users.properties 
   creating: wildfly-8.2.0.Final/domain/tmp/auth/
   creating: wildfly-8.2.0.Final/standalone/tmp/auth/
 ---> 551e8b1db275
Removing intermediate container c7d808526af6
Step 13 : ENV JBOSS_HOME /opt/jboss/wildfly
 ---> Running in 7709c6f468ef
 ---> 0cec4b9ccd6b
Removing intermediate container 7709c6f468ef
Step 14 : EXPOSE 8080 9990
 ---> Running in dd053271b09e
 ---> 0281986b0ed8
Removing intermediate container dd053271b09e
Step 15 : CMD /opt/jboss/wildfly/bin/standalone.sh -b 0.0.0.0
 ---> Running in fb29091de599
 ---> 6a1c4acf3f78
Removing intermediate container fb29091de599
Successfully built 6a1c4acf3f78
</arungupta@redhat.com>

Список образов Docker снова можно увидеть как:

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wildfly-ubuntu> docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             VIRTUAL SIZE
wildfly-ubuntu      latest              6a1c4acf3f78        5 minutes ago       749.5 MB
<none>              <none>              1a5e1aeadc85        13 minutes ago      607.7 MB
wildfly-centos      latest              97c8780a7d6a        About an hour ago   619.6 MB
centos              latest              ae0c2d0bdc10        2 weeks ago         224 MB
jboss/wildfly       latest              365390553f92        4 weeks ago         948.7 MB
ubuntu              latest              5506de2b643b        4 weeks ago         199.3 MB

Образ Docker можно запустить с помощью команды Docker docker run . Некоторые другие связанные команды:

  • docker ps : списки контейнеров
  • docker stop <id> : останавливает контейнер с указанным <id>

Запустите изображение CentOS, как показано ниже. Указание опции -i сделает ее интерактивной, а опция -t выделяет псевдо-TTY. И порт 8080 из контейнера сделан доступным через порт 80 контейнера.

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~> docker run -i -t -p 80:8080 wildfly-centos
=========================================================================
 
  JBoss Bootstrap Environment
 
  JBOSS_HOME: /opt/jboss/wildfly
 
  JAVA: /usr/lib/jvm/java/bin/java
 
  JAVA_OPTS:  -server -Xms64m -Xmx512m -XX:MaxPermSize=256m -Djava.net.preferIPv4Stack=true -Djboss.modules.system.pkgs=org.jboss.byteman -Djava.awt.headless=true
 
=========================================================================
 
22:20:52,769 INFO  [org.jboss.modules] (main) JBoss Modules version 1.3.3.Final
22:20:53,038 INFO  [org.jboss.msc] (main) JBoss MSC version 1.2.2.Final
22:20:53,120 INFO  [org.jboss.as] (MSC service thread 1-7) JBAS015899: WildFly 8.2.0.Final "Tweek" starting
22:20:54,176 INFO  [org.jboss.as.server] (Controller Boot Thread) JBAS015888: Creating http management service using socket-binding (management-http)
22:20:54,197 INFO  [org.xnio] (MSC service thread 1-10) XNIO version 3.3.0.Final
22:20:54,206 INFO  [org.xnio.nio] (MSC service thread 1-10) XNIO NIO Implementation Version 3.3.0.Final
22:20:54,239 INFO  [org.wildfly.extension.io] (ServerService Thread Pool -- 31) WFLYIO001: Worker 'default' has auto-configured to 16 core threads with 128 task threads based on your 8 available processors
22:20:54,265 INFO  [org.jboss.as.clustering.infinispan] (ServerService Thread Pool -- 32) JBAS010280: Activating Infinispan subsystem.
22:20:54,302 INFO  [org.jboss.as.security] (ServerService Thread Pool -- 45) JBAS013171: Activating Security Subsystem
22:20:54,314 WARN  [org.jboss.as.txn] (ServerService Thread Pool -- 46) JBAS010153: Node identifier property is set to the default value. Please make sure it is unique.
22:20:54,345 INFO  [org.jboss.as.jsf] (ServerService Thread Pool -- 38) JBAS012615: Activated the following JSF Implementations: [main]
22:20:54,363 INFO  [org.jboss.as.naming] (ServerService Thread Pool -- 40) JBAS011800: Activating Naming Subsystem
22:20:54,374 INFO  [org.jboss.as.security] (MSC service thread 1-8) JBAS013170: Current PicketBox version=4.0.21.Final
22:20:54,419 INFO  [org.jboss.as.webservices] (ServerService Thread Pool -- 48) JBAS015537: Activating WebServices Extension
22:20:54,486 INFO  [org.jboss.as.connector.logging] (MSC service thread 1-7) JBAS010408: Starting JCA Subsystem (IronJacamar 1.1.9.Final)
22:20:54,573 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-7) JBAS017502: Undertow 1.1.0.Final starting
22:20:54,579 INFO  [org.wildfly.extension.undertow] (ServerService Thread Pool -- 47) JBAS017502: Undertow 1.1.0.Final starting
22:20:54,586 INFO  [org.jboss.as.connector.subsystems.datasources] (ServerService Thread Pool -- 27) JBAS010403: Deploying JDBC-compliant driver class org.h2.Driver (version 1.3)
22:20:54,644 INFO  [org.jboss.remoting] (MSC service thread 1-10) JBoss Remoting version 4.0.6.Final
22:20:54,658 INFO  [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-1) JBAS010417: Started Driver service with driver-name = h2
22:20:54,763 INFO  [org.jboss.as.naming] (MSC service thread 1-1) JBAS011802: Starting Naming Service
22:20:54,761 INFO  [org.jboss.as.mail.extension] (MSC service thread 1-16) JBAS015400: Bound mail session
22:20:56,387 INFO  [org.wildfly.extension.undertow] (ServerService Thread Pool -- 47) JBAS017527: Creating file handler for path /opt/jboss/wildfly/welcome-content
22:20:56,422 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-10) JBAS017525: Started server default-server.
22:20:56,544 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-2) JBAS017531: Host default-host starting
22:20:56,712 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-10) JBAS017519: Undertow HTTP listener default listening on /0.0.0.0:8080
22:20:56,975 INFO  [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-14) JBAS010400: Bound data source
22:20:56,976 INFO  [org.jboss.as.server.deployment.scanner] (MSC service thread 1-15) JBAS015012: Started FileSystemDeploymentService for directory /opt/jboss/wildfly/standalone/deployments
22:20:57,172 INFO  [org.jboss.ws.common.management] (MSC service thread 1-10) JBWS022052: Starting JBoss Web Services - Stack CXF Server 4.3.2.Final
22:20:57,239 INFO  [org.jboss.as] (Controller Boot Thread) JBAS015961: Http management interface listening on http://127.0.0.1:9990/management
22:20:57,240 INFO  [org.jboss.as] (Controller Boot Thread) JBAS015951: Admin console listening on http://127.0.0.1:9990
22:20:57,241 INFO  [org.jboss.as] (Controller Boot Thread) JBAS015874: WildFly 8.2.0.Final "Tweek" started in 4836ms - Started 184 of 234 services (82 services are lazy, passive or on-demand)

В другой оболочке получите IP-адрес контейнера как:

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~> boot2docker ip
 
The VM's Host only interface IP address is: 192.168.59.103

А затем получите доступ к WildFly по адресу http://192.168.59.103 .

Аналогично, при запуске образа WildFly Ubuntu:

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wildfly-ubuntu> docker run -i -t -p 80:8080 wildfly-ubuntu
=========================================================================
 
  JBoss Bootstrap Environment
 
  JBOSS_HOME: /opt/jboss/wildfly
 
  JAVA: /usr/lib/jvm/java-7-openjdk-amd64/bin/java
 
  JAVA_OPTS:  -server -Xms64m -Xmx512m -XX:MaxPermSize=256m -Djava.net.preferIPv4Stack=true -Djboss.modules.system.pkgs=org.jboss.byteman -Djava.awt.headless=true
 
=========================================================================
 
22:34:07,612 INFO  [org.jboss.modules] (main) JBoss Modules version 1.3.3.Final
22:34:07,911 INFO  [org.jboss.msc] (main) JBoss MSC version 1.2.2.Final
22:34:07,996 INFO  [org.jboss.as] (MSC service thread 1-7) JBAS015899: WildFly 8.2.0.Final "Tweek" starting
22:34:09,076 INFO  [org.jboss.as.server] (Controller Boot Thread) JBAS015888: Creating http management service using socket-binding (management-http)
22:34:09,097 INFO  [org.xnio] (MSC service thread 1-9) XNIO version 3.3.0.Final
22:34:09,106 INFO  [org.xnio.nio] (MSC service thread 1-9) XNIO NIO Implementation Version 3.3.0.Final
22:34:09,136 INFO  [org.jboss.as.clustering.infinispan] (ServerService Thread Pool -- 32) JBAS010280: Activating Infinispan subsystem.
22:34:09,170 INFO  [org.jboss.as.security] (ServerService Thread Pool -- 45) JBAS013171: Activating Security Subsystem
22:34:09,180 WARN  [org.jboss.as.txn] (ServerService Thread Pool -- 46) JBAS010153: Node identifier property is set to the default value. Please make sure it is unique.
22:34:09,191 INFO  [org.jboss.as.jsf] (ServerService Thread Pool -- 38) JBAS012615: Activated the following JSF Implementations: [main]
22:34:09,207 INFO  [org.jboss.as.naming] (ServerService Thread Pool -- 40) JBAS011800: Activating Naming Subsystem
22:34:09,212 INFO  [org.jboss.as.security] (MSC service thread 1-2) JBAS013170: Current PicketBox version=4.0.21.Final
22:34:09,230 INFO  [org.jboss.as.webservices] (ServerService Thread Pool -- 48) JBAS015537: Activating WebServices Extension
22:34:09,317 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-6) JBAS017502: Undertow 1.1.0.Final starting
22:34:09,317 INFO  [org.wildfly.extension.undertow] (ServerService Thread Pool -- 47) JBAS017502: Undertow 1.1.0.Final starting
22:34:09,323 INFO  [org.wildfly.extension.io] (ServerService Thread Pool -- 31) WFLYIO001: Worker 'default' has auto-configured to 16 core threads with 128 task threads based on your 8 available processors
22:34:09,413 INFO  [org.jboss.as.connector.logging] (MSC service thread 1-15) JBAS010408: Starting JCA Subsystem (IronJacamar 1.1.9.Final)
22:34:09,617 INFO  [org.jboss.as.connector.subsystems.datasources] (ServerService Thread Pool -- 27) JBAS010403: Deploying JDBC-compliant driver class org.h2.Driver (version 1.3)
22:34:09,658 INFO  [org.jboss.as.naming] (MSC service thread 1-10) JBAS011802: Starting Naming Service
22:34:09,674 INFO  [org.jboss.as.mail.extension] (MSC service thread 1-1) JBAS015400: Bound mail session
22:34:09,692 INFO  [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-12) JBAS010417: Started Driver service with driver-name = h2
22:34:09,693 INFO  [org.jboss.remoting] (MSC service thread 1-9) JBoss Remoting version 4.0.6.Final
22:34:11,117 INFO  [org.wildfly.extension.undertow] (ServerService Thread Pool -- 47) JBAS017527: Creating file handler for path /opt/jboss/wildfly/welcome-content
22:34:11,134 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-5) JBAS017525: Started server default-server.
22:34:11,206 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-14) JBAS017531: Host default-host starting
22:34:11,377 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-5) JBAS017519: Undertow HTTP listener default listening on /0.0.0.0:8080
22:34:11,576 INFO  [org.jboss.as.server.deployment.scanner] (MSC service thread 1-2) JBAS015012: Started FileSystemDeploymentService for directory /opt/jboss/wildfly/standalone/deployments
22:34:11,627 INFO  [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-8) JBAS010400: Bound data source
22:34:11,847 INFO  [org.jboss.ws.common.management] (MSC service thread 1-6) JBWS022052: Starting JBoss Web Services - Stack CXF Server 4.3.2.Final
22:34:11,911 INFO  [org.jboss.as] (Controller Boot Thread) JBAS015961: Http management interface listening on http://127.0.0.1:9990/management
22:34:11,912 INFO  [org.jboss.as] (Controller Boot Thread) JBAS015951: Admin console listening on http://127.0.0.1:9990
22:34:11,912 INFO  [org.jboss.as] (Controller Boot Thread) JBAS015874: WildFly 8.2.0.Final "Tweek" started in 4762ms - Started 184 of 234 services (82 services are lazy, passive or on-demand)

Вы можете войти на хост-машину, как показано на рисунке:

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boot2docker ssh

Различные слои изображения хранятся в каталоге /var/lib/docker как показано ниже:

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docker-images> boot2docker ssh
                        ##        .
                  ## ## ##       ==
               ## ## ## ##      ===
           /""""""""""""""""\___/ ===
      ~~~ {~~ ~~~~ ~~~ ~~~~ ~~ ~ /  ===- ~~~
           \______ o          __/
             \    \        __/
              \____\______/
 _                 _   ____     _            _
| |__   ___   ___ | |_|___ \ __| | ___   ___| | _____ _ __
| '_ \ / _ \ / _ \| __| __) / _` |/ _ \ / __| |/ / _ \ '__|
| |_) | (_) | (_) | |_ / __/ (_| | (_) | (__|   <  __/ |
|_.__/ \___/ \___/ \__|_____\__,_|\___/ \___|_|\_\___|_|
Boot2Docker version 1.3.2, build master : 495c19a - Mon Nov 24 20:40:58 UTC 2014
Docker version 1.3.2, build 39fa2fa
docker@boot2docker:~$ cd /var/lib/docker/
docker@boot2docker:/mnt/sda1/var/lib/docker$ ls -la
total 64
drwxr-xr-x   10 root     root          4096 Nov 24 23:33 ./
drwxr-xr-x    4 root     root          4096 Nov 24 19:15 ../
drwxr-xr-x    5 root     root          4096 Nov 24 19:16 aufs/
drwx------   17 root     root          4096 Nov 24 23:33 containers/
drwx------    3 root     root          4096 Nov 24 19:16 execdriver/
drwx------   84 root     root         12288 Nov 24 23:28 graph/
drwx------    2 root     root          4096 Nov 25 14:50 init/
-rw-r--r--    1 root     root         11264 Nov 24 23:33 linkgraph.db
-rw-------    1 root     root           565 Nov 24 23:28 repositories-aufs
drwx------    2 root     root          4096 Nov 24 23:28 tmp/
drwx------    2 root     root          4096 Nov 24 19:21 trust/
drwx------    2 root     root          4096 Nov 24 19:16 volumes/

Образ виртуальной машины на Mac OSX хранится в ~/VirtualBox VMs/boot2docker-vm . Этот каталог может расти довольно быстро, если промежуточные контейнеры не будут удалены. boot2docker-vm.vmdk на моей машине составляет ~ 5 ГБ для этих разных образов.

Вы можете сбросить его, выполнив следующие команды (ВНИМАНИЕ: Это уничтожит все изображения, которые вы загрузили и создали до сих пор):

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boot2docker down
boot2docker destroy
boot2docker init
boot2docker up

Контейнеры, как вы можете себе представить, имеют отпечаток памяти.

Больше доброты Docker придет в последующих блогах!

Ссылка: Создайте свой собственный образ Docker от нашего партнера JCG Аруна Гупта в блоге Miles to go 2.0… .
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