Allow to configure docker password using the settings file (#317)

prepare-vms/README.md

@@ -93,7 +93,7 @@ wrap         Run this program in a container
 - The `./workshopctl` script can be executed directly.
 - It will run locally if all its dependencies are fulfilled; otherwise it will run in the Docker container you created with `docker-compose build` (preparevms_prepare-vms).
 - During `start` it will add your default local SSH key to all instances under the `ubuntu` user.
-- During `deploy` it will create the `docker` user with password `training`, which is printing on the cards for students. For now, this is hard coded.
+- During `deploy` it will create the `docker` user with password `training`, which is printing on the cards for students. This can be configured with the `docker_user_password` property in the settings file.
 
 ### Example Steps to Launch a Batch of AWS Instances for a Workshop
 

prepare-vms/cards.html

@@ -85,7 +85,7 @@ img {
                 <tr><td>login:</td></tr>
                 <tr><td class="logpass">docker</td></tr>
                 <tr><td>password:</td></tr>
-                <tr><td class="logpass">training</td></tr>
+                <tr><td class="logpass">{{ docker_user_password }}}</td></tr>
             </table>
 
         </p>

prepare-vms/lib/postprep.py

@@ -13,6 +13,7 @@ COMPOSE_VERSION = config["compose_version"]
 MACHINE_VERSION = config["machine_version"]
 CLUSTER_SIZE = config["clustersize"]
 ENGINE_VERSION = config["engine_version"]
+DOCKER_USER_PASSWORD = config["docker_user_password"]
 
 #################################
 
@@ -54,9 +55,9 @@ system("curl --silent {} > /tmp/ipv4".format(ipv4_retrieval_endpoint))
 
 ipv4 = open("/tmp/ipv4").read()
 
-# Add a "docker" user with password "training"
+# Add a "docker" user with password coming from the settings
 system("id docker || sudo useradd -d /home/docker -m -s /bin/bash docker")
-system("echo docker:training | sudo chpasswd")
+system("echo docker:{} | sudo chpasswd".format(DOCKER_USER_PASSWORD))
 
 # Fancy prompt courtesy of @soulshake.
 system("""sudo -u docker tee -a /home/docker/.bashrc <<SQRL

prepare-vms/settings/example.yaml

@@ -22,3 +22,6 @@ engine_version: test
 # These correspond to the version numbers visible on their respective GitHub release pages
 compose_version: 1.18.0
 machine_version: 0.13.0
+
+# Password used to connect with the "docker user"
+docker_user_password: training

prepare-vms/settings/fundamentals.yaml

@@ -22,3 +22,6 @@ engine_version: stable
 # These correspond to the version numbers visible on their respective GitHub release pages
 compose_version: 1.21.1
 machine_version: 0.14.0
+
+# Password used to connect with the "docker user"
+docker_user_password: training

prepare-vms/settings/kube101.html

@@ -85,7 +85,7 @@ img {
                 <tr><td>login:</td></tr>
                 <tr><td class="logpass">docker</td></tr>
                 <tr><td>password:</td></tr>
-                <tr><td class="logpass">training</td></tr>
+                <tr><td class="logpass">{{ docker_user_password }}</td></tr>
             </table>
 
         </p>

prepare-vms/settings/kube101.yaml

@@ -22,3 +22,6 @@ engine_version: stable
 # These correspond to the version numbers visible on their respective GitHub release pages
 compose_version: 1.21.1
 machine_version: 0.14.0
+
+# Password used to connect with the "docker user"
+docker_user_password: training

prepare-vms/settings/swarm.yaml

@@ -22,3 +22,6 @@ engine_version: stable
 # These correspond to the version numbers visible on their respective GitHub release pages
 compose_version: 1.21.1
 machine_version: 0.14.0
+
+# Password used to connect with the "docker user"
+docker_user_password: training