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Source  : 710abbc
Branch  : main
Author  : Andy Turner <[email protected]>
Time    : 2024-08-16 08:20:10 +0000
Message : Merge pull request #242 from jcohen02/fix/issue228

Adding solution and guidance to questions in advanced-containers.md

advanced-containers.md

@@ -50,9 +50,40 @@ container image.
 
 ## Running containers
 
-What command would we use to run Python from the `alpine-python` container?
+Question: What command would we use to run Python from the `alpine-python` container?
 
 
+:::::::::::::::  solution
+
+## Solution
+
+We can run a container from the alpine-python container image using:
+
+```bash
+$ docker container run alice/alpine-python
+```
+
+What happens? Since the `Dockerfile` that we built this container image from
+had a `CMD` entry that specified `["python3", "--version"]`, running the above
+command simply starts a container from the image, runs the `python3 --version`
+command and exits. You should have seen the installed version of Python printed
+to the terminal.
+
+Instead, if we want to run an interactive Python terminal, we can use `docker
+container run` to override the default run command embedded within the
+container image. So we could run:
+
+```bash
+$ docker container run -it alice/alpine-python python3
+```
+
+The `-it` tells Docker to set up and interactive terminal connection to the
+running container, and then we're telling Docker to run the `python3` command
+inside the container which gives us an interactive Python interpreter prompt.
+_(type `exit()` to exit!)_
+
+:::::::::::::::::::::::::
+
 ::::::::::::::::::::::::::::::::::::::::::::::::::
 
 If we try running the container and Python script, what happens?
@@ -69,9 +100,12 @@ python3: can't open file '//sum.py': [Errno 2] No such file or directory
 
 ## No such file or directory
 
-What does the error message mean? Why might the Python inside the container
+Question: What does the error message mean? Why might the Python inside the container
 not be able to find or open our script?
 
+This question is here for you to think about - we explore the answer to this
+question in the content below.
+
 ::::::::::::::::::::::::::::::::::::::::::::::::::
 
 The problem here is that the container and its filesystem is separate from our

md5sum.txt

@@ -11,7 +11,7 @@
 "episodes/managing-containers.md" "cd974b695f6fa04b3042765a827df552" "site/built/managing-containers.md" "2024-06-27"
 "episodes/docker-hub.md" "430220bbc73531857a09eddfc6247b4c" "site/built/docker-hub.md" "2024-06-27"
 "episodes/creating-container-images.md" "1c4f5343cd4e6e32f49c7105b879cd46" "site/built/creating-container-images.md" "2024-08-16"
-"episodes/advanced-containers.md" "b74165d491ae2922492f766f9002b47a" "site/built/advanced-containers.md" "2024-08-01"
+"episodes/advanced-containers.md" "a7bce20bf3222a7ac60363800526990d" "site/built/advanced-containers.md" "2024-08-16"
 "episodes/docker-image-examples.md" "aad130919b6a4721f2c96730694e7799" "site/built/docker-image-examples.md" "2024-08-01"
 "episodes/reproduciblity.md" "8f2340e2e1e564d657d8c34743aa95d0" "site/built/reproduciblity.md" "2024-08-01"
 "instructors/06-containers-on-the-cloud.md" "6838e441f1869570ec5313bc72e85eb4" "site/built/06-containers-on-the-cloud.md" "2024-06-27"