Minor language changes and added license headers

Additionally:
* Move comment outside of `rm` command.

Story: 2001694
Task: 22889

Change-Id: I9dd334c05bf9e209427db1b987f475e031d11d80

docker/Dockerfile

@@ -99,11 +99,11 @@ ONBUILD RUN \
                 "$CONSTRAINTS_FILE"?h="$CONSTRAINTS_BRANCH" >> /VERSIONS && \
             # Clean after instalation.
             apk del .build-deps && \
+            # Pip is leaving monasca-common repo in /src so remove it.
             rm -rf \
                 /app \
                 /root/.cache/ \
-                # Pip is leaving monasca-common repo in /src so remove it.
+                /src/monasca-common/java/ \
-                /src/ \
                 /tmp/* \
                 /var/cache/apk/* \
                 /var/log/* && \

docker/README.rst

@@ -5,11 +5,11 @@ Docker base image for Monasca services
 This image is used as a starting point for images of all Monasca services.
 
 
-Building monasca-base
+Building monasca-base image
-=====================
+===========================
 
-You need to have Docker installed (minimum supported version is ``17.09``).
+You need to have Docker installed (minimum tested version is ``17.09``).
-Then you could build image inside of this folder:
+Then you can build image inside of this folder by running:
 
 ``docker build --no-cache -t monasca-base:1.0.0 .``
 
@@ -17,38 +17,38 @@ Then you could build image inside of this folder:
 Building child image
 --------------------
 
-In the ``example`` folder you could file sample of how to start building
+In the ``example`` folder you can find samples of how to start building
-new child image using ``monasca-base`` as start.
+new child image using ``monasca-base``.
 
 Requirements
 ~~~~~~~~~~~~
 
-Every child image need to provide two files:
+Every child image has to provide two files:
 
 start.sh
-  In this starting script provide all steps that direct to proper service
+  In this starting script provide all steps that lead to the proper service
   start. Including usage of wait scripts and templating of configuration files.
-  You also could provide ability to allow running container after service died
+  You also could provide the ability to allow running container after service
-  for easier debugging.
+  died for easier debugging.
 
 health_check.py
-  This file will be used for checking status of application running in the
+  This file will be used for checking the status of the application running in
-  container. It will be useful for programs like Kubernetes or Docker Swarm
+  the container. It will be useful for container orchestration like Kubernetes
-  to properly handle services that are still running but stopped being
+  or Docker Swarm to properly handle services that are still running but
-  responsive. Avoid using `curl` directly and instead use `health_check.py`
+  stopped being responsive. Avoid using `curl` directly and instead, use
-  written with specific service in mind. It will provide more flexibility
+  `health_check.py` written with specific service in mind. It will provide more
-  like when creating JSON request body.
+  flexibility like when creating JSON request body.
 
 
 Wait scripts
 ------------
 
-Some Python libraries are already preinstalled: `pykafka` and `PyMySQL`.
+Some Python libraries are already pre-installed: `pykafka` and `PyMySQL`. They
-They are used by wait scripts and in the process of creating child image
+are used by wait scripts and in the process of creating the child image `pip3`
-`pip3` will reinstall them to proper versions confronting to upper constraints
+will reinstall them to use proper versions confronting the upper constraints
 file.
 
-This wait scripts will be available in every child image and could be used in
+These wait scripts will be available in every child image and can be used in
 `start.sh` to avoid unnecessary errors and restarts of containers when they
 are started.
 
@@ -58,18 +58,18 @@ are started.
     python3 /mysql_check.py || exit 1
     /wait_for.sh 192.168.10.6:5000 || exit 1
 
-Please, check content of every of this files for documentation of what
+Please, check the content of each of these files for documentation of what
 environment variables are used and more usage examples.
 
 
 Useful commands
 ---------------
 
-List all labels on image (you need to have ``jq`` installed):
+List all labels of the image (you need to have ``jq`` installed):
 
 ``docker inspect monasca-api:master | jq .[].Config.Labels``
 
-Get all steps from what Docker image was build:
+Get all steps of the Docker image build process history:
 
 ::
 

docker/example/build_image.sh

@@ -1,5 +1,17 @@
 #!/bin/bash
 
+#  Licensed under the Apache License, Version 2.0 (the "License"); you may
+#  not use this file except in compliance with the License. You may obtain
+#  a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#  License for the specific language governing permissions and limitations
+#  under the License.
+
 # TODO(Dobroslaw): move this script to monasca-common/docker folder
 # and leave here small script to download it and execute using env variables
 # to minimize code duplication.

docker/example/start.sh

@@ -1,4 +1,17 @@
 #!/bin/sh
+
+#  Licensed under the Apache License, Version 2.0 (the "License"); you may
+#  not use this file except in compliance with the License. You may obtain
+#  a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#  License for the specific language governing permissions and limitations
+#  under the License.
+
 # Starting script.
 # All checks you need to do before service could be safely started should
 # be added in this file.

docker/wait_for.sh

@@ -1,5 +1,17 @@
 #!/bin/sh
 
+#  Licensed under the Apache License, Version 2.0 (the "License"); you may
+#  not use this file except in compliance with the License. You may obtain
+#  a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#  License for the specific language governing permissions and limitations
+#  under the License.
+
 # This script will return 0 when on specific address (like 192.168.10.6:5000)
 # scanning will reveal that port is responding.
 #