Replace deprecated MAINTAINER with LABEL (#1445)

Replace MAINTAINER instruction with LABEL as MAINTAINER was deprecated in https://github.com/docker/docker/pull/25466

docker-hub/webhooks.md

@@ -28,7 +28,7 @@ example webhook below generates an HTTP POST that delivers a JSON payload:
     "comment_count": "0",
     "date_created": 1.417494799e+09,
     "description": "",
-    "dockerfile": "#\n# BUILD\u0009\u0009docker build -t svendowideit/apt-cacher .\n# RUN\u0009\u0009docker run -d -p 3142:3142 -name apt-cacher-run apt-cacher\n#\n# and then you can run containers with:\n# \u0009\u0009docker run -t -i -rm -e http_proxy http://192.168.1.2:3142/ debian bash\n#\nFROM\u0009\u0009ubuntu\nMAINTAINER\u0009SvenDowideit@home.org.au\n\n\nVOLUME\u0009\u0009[\/var/cache/apt-cacher-ng\]\nRUN\u0009\u0009apt-get update ; apt-get install -yq apt-cacher-ng\n\nEXPOSE \u0009\u00093142\nCMD\u0009\u0009chmod 777 /var/cache/apt-cacher-ng ; /etc/init.d/apt-cacher-ng start ; tail -f /var/log/apt-cacher-ng/*\n",
+    "dockerfile": "#\n# BUILD\u0009\u0009docker build -t svendowideit/apt-cacher .\n# RUN\u0009\u0009docker run -d -p 3142:3142 -name apt-cacher-run apt-cacher\n#\n# and then you can run containers with:\n# \u0009\u0009docker run -t -i -rm -e http_proxy http://192.168.1.2:3142/ debian bash\n#\nFROM\u0009\u0009ubuntu\n\n\nVOLUME\u0009\u0009[\/var/cache/apt-cacher-ng\]\nRUN\u0009\u0009apt-get update ; apt-get install -yq apt-cacher-ng\n\nEXPOSE \u0009\u00093142\nCMD\u0009\u0009chmod 777 /var/cache/apt-cacher-ng ; /etc/init.d/apt-cacher-ng start ; tail -f /var/log/apt-cacher-ng/*\n",
     "full_description": "Docker Hub based automated build from a GitHub repo",
     "is_official": false,
     "is_private": true,

engine/admin/ambassador_pattern_linking.md

@@ -144,7 +144,6 @@ case `192.168.1.52:6379`.
     # use alpine because its a minimal image with a package manager.
     # prettymuch all that is needed is a container that has a functioning env and socat (or equivalent)
     FROM	alpine:3.2
-    MAINTAINER	SvenDowideit@home.org.au
 
     RUN apk update && \
     	apk add socat && \

engine/admin/using_supervisord.md

@@ -28,7 +28,6 @@ Let's start by creating a basic `Dockerfile` for our new image.
 
 ```Dockerfile
 FROM ubuntu:16.04
-MAINTAINER examples@docker.com
 ```
 
 ## Installing Supervisor
@@ -98,7 +97,6 @@ Your completed Dockerfile now looks like this:
 
 ```Dockerfile
 FROM ubuntu:16.04
-MAINTAINER examples@docker.com
 
 RUN apt-get update && apt-get install -y openssh-server apache2 supervisor
 RUN mkdir -p /var/lock/apache2 /var/run/apache2 /var/run/sshd /var/log/supervisor

engine/examples/apt-cacher-ng.Dockerfile

@@ -6,7 +6,6 @@
 #	docker run -t -i --rm -e http_proxy http://dockerhost:3142/ debian bash
 #
 FROM		ubuntu
-MAINTAINER	SvenDowideit@docker.com
 
 VOLUME		["/var/cache/apt-cacher-ng"]
 RUN		apt-get update && apt-get install -y apt-cacher-ng

engine/examples/apt-cacher-ng.md

@@ -27,7 +27,6 @@ Use the following Dockerfile:
     # Here, `dockerhost` is the IP address or FQDN of a host running the Docker daemon
     # which acts as an APT proxy server.
     FROM        ubuntu
-    MAINTAINER  SvenDowideit@docker.com
 
     VOLUME      ["/var/cache/apt-cacher-ng"]
     RUN     apt-get update && apt-get install -y apt-cacher-ng

engine/examples/mongodb.md

@@ -52,13 +52,6 @@ We will build our image using the latest version of Ubuntu from the
 FROM       ubuntu:latest
 ```
 
-Continuing, we will declare the `MAINTAINER` of the `Dockerfile`:
-
-```dockerfile
-# Format: MAINTAINER Name <email@addr.ess>
-MAINTAINER M.Y. Name <myname@addr.ess>
-```
-
 > **Note:** Although Ubuntu systems have MongoDB packages, they are likely to
 > be outdated. Therefore in this example, we will use the official MongoDB
 > packages.

engine/examples/mongodb/Dockerfile

@@ -3,7 +3,6 @@
 # http://docs.mongodb.org/manual/tutorial/install-mongodb-on-ubuntu/
 
 FROM       ubuntu:16.04
-MAINTAINER Docker
 
 # Installation:
 # Import MongoDB public GPG key AND create a MongoDB list file

engine/examples/postgresql_service.Dockerfile

@@ -3,7 +3,6 @@
 #
 
 FROM ubuntu
-MAINTAINER SvenDowideit@docker.com
 
 # Add the PostgreSQL PGP key to verify their Debian packages.
 # It should be the same key as https://www.postgresql.org/media/keys/ACCC4CF8.asc

engine/examples/postgresql_service.md

@@ -26,7 +26,6 @@ suitably secure.
 #
 
 FROM ubuntu
-MAINTAINER SvenDowideit@docker.com
 
 # Add the PostgreSQL PGP key to verify their Debian packages.
 # It should be the same key as https://www.postgresql.org/media/keys/ACCC4CF8.asc

engine/examples/running_riak_service.Dockerfile

@@ -4,7 +4,6 @@
 
 # Use the Ubuntu base image provided by dotCloud
 FROM ubuntu:trusty
-MAINTAINER Hector Castro hector@basho.com
 
 # Install Riak repository before we do apt-get update, so that update happens
 # in a single step

engine/examples/running_riak_service.md

@@ -23,7 +23,6 @@ of. We'll use [Ubuntu](https://hub.docker.com/_/ubuntu/) (tag:
 
     # Use the Ubuntu base image provided by dotCloud
     FROM ubuntu:trusty
-    MAINTAINER Hector Castro hector@basho.com
 
 After that, we install the curl which is used to download the repository setup
 script and we download the setup script and run it.

engine/examples/running_ssh_service.Dockerfile

@@ -1,5 +1,4 @@
 FROM ubuntu:16.04
-MAINTAINER Sven Dowideit <SvenDowideit@docker.com>
 
 RUN apt-get update && apt-get install -y openssh-server
 RUN mkdir /var/run/sshd

engine/examples/running_ssh_service.md

@@ -12,7 +12,6 @@ quick access to a test container.
 
 ```Dockerfile
 FROM ubuntu:16.04
-MAINTAINER Sven Dowideit <SvenDowideit@docker.com>
 
 RUN apt-get update && apt-get install -y openssh-server
 RUN mkdir /var/run/sshd

engine/reference/commandline/image_pull.md

@@ -13,3 +13,4 @@ https://www.github.com/docker/docker
 -->
 
 {% include cli.md %}
+

engine/understanding-docker.md

@@ -183,7 +183,7 @@ instruction creates a new layer in the image. Some examples of Dockerfile
 instructions are:
 
 * Specify the base image (`FROM`)
-* Specify the maintainer (`MAINTAINER`)
+* Specify image metadata (`LABEL`)
 * Run a command (`RUN`)
 * Add a file or directory (`ADD`)
 * Create an environment variable (`ENV`)

swarm/scheduler/filter.md

@@ -138,22 +138,17 @@ Again, you'll avoid flash drives.
 $ mkdir sinatra
 $ cd sinatra
 $ echo "FROM ubuntu:14.04" > Dockerfile
-$ echo "MAINTAINER Kate Smith <ksmith@example.com>" >> Dockerfile
 $ echo "RUN apt-get update && apt-get install -y ruby ruby-dev" >> Dockerfile
 $ echo "RUN gem install sinatra" >> Dockerfile
 $ docker build --build-arg=constraint:storage==disk -t ouruser/sinatra:v2 .
 Sending build context to Docker daemon 2.048 kB
 Step 1 : FROM ubuntu:14.04
  ---> a5a467fddcb8
-Step 2 : MAINTAINER Kate Smith <ksmith@example.com>
- ---> Running in 49e97019dcb8
- ---> de8670dcf80e
-Removing intermediate container 49e97019dcb8
-Step 3 : RUN apt-get update && apt-get install -y ruby ruby-dev
+Step 2 : RUN apt-get update && apt-get install -y ruby ruby-dev
  ---> Running in 26c9fbc55aeb
  ---> 30681ef95fff
 Removing intermediate container 26c9fbc55aeb
-Step 4 : RUN gem install sinatra
+Step 3 : RUN gem install sinatra
  ---> Running in 68671d4a17b0
  ---> cd70495a1514
 Removing intermediate container 68671d4a17b0

test.md

@@ -297,7 +297,6 @@ command=/bin/bash -c "source /etc/apache2/envvars && exec /usr/sbin/apache2 -DFO
 #
 
 FROM ubuntu
-MAINTAINER SvenDowideit@docker.com
 
 # Add the PostgreSQL PGP key to verify their Debian packages.
 # It should be the same key as https://www.postgresql.org/media/keys/ACCC4CF8.asc

tests/Dockerfile

@@ -1,5 +1,4 @@
 FROM golang:1.7.3-alpine
-MAINTAINER Adrien Duermael <adrien@docker.com>
 
 COPY src /go/src
 WORKDIR /go/src/validator