Final slides

010_basics/02_volumes/permissions.md

@@ -1,7 +1,7 @@
 ## Permissions
 <!-- .slide: id="volume_permissions" -->
 
-XXX Root-owned files
+The nuisance of root-owned files
 
 Creating files in user-owned directories can be removed:
 

020_advanced/150_entrypoint/Dockerfile

@@ -1,2 +1,4 @@
 FROM nginx:stable
 COPY entrypoint.sh /
+RUN chmod +x /entrypoint.sh
+ENTRYPOINT [ "/entrypoint.sh" ]

020_advanced/150_entrypoint/entrypoint.sh

@@ -2,5 +2,9 @@
 set -o errexit
 
 if test -n "${WELCOME_TO_TEXT}"; then
+    echo "Setting welcome text to <${WELCOME_TO_TEXT}>"
     sed -i "s|<h1>Welcome to nginx\!</h1>|<h1>Welcome to ${WELCOME_TO_TEXT}\!</h1>|" /usr/share/nginx/html/index.html
 fi
+
+echo "Calling upstream entrypoint"
+exec /docker-entrypoint.sh nginx -g "daemon off;"

020_advanced/150_entrypoint/slides.md

@@ -43,4 +43,21 @@ $ docker run -it --rm entrypoint
 
 ## My first entrypoint
 
-XXX
+Add an entrypoint to change the behaviour
+
+Example: Change text in web page
+
+```bash
+docker build \
+    --tag my-nginx \
+    .
+docker run --detach \
+    --publish 127.0.0.1:80:80 \
+    --env WELCOME_TO_TEXT="Haufe X360" \
+    my-nginx
+curl localhost
+```
+
+### More use cases
+
+Change configuration of nginx in `/etc/nginx`