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Docker: show welcome page on port 80 when entrypoint.d is empty.

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The entrypoint script now performs a default configuration when no useful
files are found in /docker-entrypoint.d/

The default configuration serves a welcome page in response to all
requests, using Markdown unless text/html is sent in the Accept header.

This provides a useful 'hello world' experience when running a Unit
container for the first time.
This commit is contained in:
Liam Crilly
2023-05-09 22:53:18 +01:00
parent 8ab16f71fe
commit d481801907
5 changed files with 139 additions and 36 deletions
Download Patch File Download Diff File Expand all files Collapse all files

73
pkg/docker/docker-entrypoint.sh
View File

@@ -25,21 +25,23 @@ if [ "$1" = "unitd" ] || [ "$1" = "unitd-debug" ]; then
if /usr/bin/find "/var/lib/unit/" -mindepth 1 -print -quit 2>/dev/null | /bin/grep -q .; then
echo "$0: /var/lib/unit/ is not empty, skipping initial configuration..."
else
if /usr/bin/find "/docker-entrypoint.d/" -mindepth 1 -print -quit 2>/dev/null | /bin/grep -q .; then
echo "$0: /docker-entrypoint.d/ is not empty, launching Unit daemon to perform initial configuration..."
/usr/sbin/$1 --control unix:/var/run/control.unit.sock
echo "$0: Launching Unit daemon to perform initial configuration..."
/usr/sbin/$1 --control unix:/var/run/control.unit.sock
for i in $(/usr/bin/seq $WAITLOOPS); do
if [ ! -S /var/run/control.unit.sock ]; then
echo "$0: Waiting for control socket to be created..."
/bin/sleep $SLEEPSEC
else
break
fi
done
# even when the control socket exists, it does not mean unit has finished initialisation
# this curl call will get a reply once unit is fully launched
/usr/bin/curl -f -s -X GET --unix-socket /var/run/control.unit.sock http://localhost/
for i in $(/usr/bin/seq $WAITLOOPS); do
if [ ! -S /var/run/control.unit.sock ]; then
echo "$0: Waiting for control socket to be created..."
/bin/sleep $SLEEPSEC
else
break
fi
done
# even when the control socket exists, it does not mean unit has finished initialisation
# this curl call will get a reply once unit is fully launched
/usr/bin/curl -s -X GET --unix-socket /var/run/control.unit.sock http://localhost/
if /usr/bin/find "/docker-entrypoint.d/" -mindepth 1 -print -quit 2>/dev/null | /bin/grep -q .; then
echo "$0: /docker-entrypoint.d/ is not empty, applying initial configuration..."
echo "$0: Looking for certificate bundles in /docker-entrypoint.d/..."
for f in $(/usr/bin/find /docker-entrypoint.d/ -type f -name "*.pem"); do
@@ -69,29 +71,30 @@ if [ "$1" = "unitd" ] || [ "$1" = "unitd-debug" ]; then
for f in $(/usr/bin/find /docker-entrypoint.d/ -type f -not -name "*.sh" -not -name "*.json" -not -name "*.pem" -not -name "*.js"); do
echo "$0: Ignoring $f";
done
echo "$0: Stopping Unit daemon after initial configuration..."
kill -TERM $(/bin/cat /var/run/unit.pid)
for i in $(/usr/bin/seq $WAITLOOPS); do
if [ -S /var/run/control.unit.sock ]; then
echo "$0: Waiting for control socket to be removed..."
/bin/sleep $SLEEPSEC
else
break
fi
done
if [ -S /var/run/control.unit.sock ]; then
kill -KILL $(/bin/cat /var/run/unit.pid)
rm -f /var/run/control.unit.sock
fi
echo
echo "$0: Unit initial configuration complete; ready for start up..."
echo
else
echo "$0: /docker-entrypoint.d/ is empty, skipping initial configuration..."
echo "$0: /docker-entrypoint.d/ is empty, creating 'welcome' configuration..."
curl_put /usr/share/unit/welcome/welcome.json "config"
fi
echo "$0: Stopping Unit daemon after initial configuration..."
kill -TERM $(/bin/cat /var/run/unit.pid)
for i in $(/usr/bin/seq $WAITLOOPS); do
if [ -S /var/run/control.unit.sock ]; then
echo "$0: Waiting for control socket to be removed..."
/bin/sleep $SLEEPSEC
else
break
fi
done
if [ -S /var/run/control.unit.sock ]; then
kill -KILL $(/bin/cat /var/run/unit.pid)
rm -f /var/run/control.unit.sock
fi
echo
echo "$0: Unit initial configuration complete; ready for start up..."
echo
fi
fi