DCD-558: Add start of Python entrypoint; execution, permissions, and server.xml.

Dockerfile

@@ -17,7 +17,7 @@ WORKDIR $CONFLUENCE_HOME
 EXPOSE 8090
 EXPOSE 8091
 
-CMD ["/entrypoint.sh", "-fg"]
+CMD ["/entrypoint.py", "-fg"]
 ENTRYPOINT ["/sbin/tini", "--"]
 
 RUN apt-get update \
@@ -28,7 +28,7 @@ ARG TINI_VERSION=v0.18.0
 ADD https://github.com/krallin/tini/releases/download/${TINI_VERSION}/tini /sbin/tini
 RUN chmod +x /sbin/tini
 
-COPY entrypoint.sh              			/entrypoint.sh
+COPY entrypoint.py              			/entrypoint.py
 COPY scripts/*						/opt/atlassian/bin/
 COPY config/*						/opt/atlassian/etc/
 

Dockerfile-alpine

@@ -17,7 +17,7 @@ WORKDIR $CONFLUENCE_HOME
 EXPOSE 8090
 EXPOSE 8091
 
-CMD ["/entrypoint.sh", "-fg"]
+CMD ["/entrypoint.py", "-fg"]
 ENTRYPOINT ["/sbin/tini", "--"]
 
 RUN apk add --no-cache ca-certificates wget curl openssh bash procps openssl perl ttf-dejavu tini python3 py3-jinja2
@@ -28,7 +28,7 @@ RUN ln -s /usr/lib/libfontconfig.so.1 /usr/lib/libfontconfig.so \
     && ln -s /lib/libc.musl-x86_64.so.1 /usr/lib/libc.musl-x86_64.so.1
 ENV LD_LIBRARY_PATH /usr/lib
 
-COPY entrypoint.sh              			/entrypoint.sh
+COPY entrypoint.py              			/entrypoint.py
 COPY scripts/*						/opt/atlassian/bin/
 COPY config/*						/opt/atlassian/etc/
 

entrypoint.py

@@ -0,0 +1,97 @@
+#!/usr/bin/python3
+
+import sys
+import os
+import shutil
+import logging
+import jinja2 as j2
+
+
+def set_perms(path, user, group, mode):
+    logging.info("SETTGING PERMS "+path)
+    shutil.chown(path, user=user, group=group)
+    os.chmod(path, mode)
+
+def chown_all(path, user, group, mode):
+    for root, dirs, files in os.walk(path):
+        for d in dirs:
+            set_perms(os.path.join(root, d), user, group, mode)
+        for f in files:
+            set_perms(os.path.join(root, d), user, group, mode)
+    set_perms(path, user, group, mode)
+
+# Import all ATL_* environment variables. We lower-case these for
+# compatability with Ansible template convention. We handle default
+# and legacy mappings below.
+env = {k.lower(): v
+       for k, v in os.environ.items()
+       if k.startswith('ATL_')}
+
+# Extract some common parameters
+confluence_home = os.environ["CONFLUENCE_HOME"]
+confluence_install_dir = os.environ["CONFLUENCE_INSTALL_DIR"]
+user = os.environ["RUN_USER"]
+group = os.environ["RUN_GROUP"]
+
+# Setup Jinja2 for templating
+jenv = j2.Environment(
+    loader=j2.FileSystemLoader('/opt/atlassian/etc/'),
+    autoescape=j2.select_autoescape(['xml']))
+
+logging.basicConfig(level=logging.DEBUG)
+
+
+######################################################################
+# Generate server.xml for Tomcat.
+
+defaults = {
+    # We support some variables from older versions of the Docker images
+    # for backwards compatability, if the new version is not set.
+    'atl_proxy_name': os.environ.get('CATALINA_CONNECTOR_PROXYNAME'),
+    'atl_proxy_port': os.environ.get('CATALINA_CONNECTOR_PROXYPORT'),
+    'atl_tomcat_secure': os.environ.get('CATALINA_CONNECTOR_SECURE'),
+    'atl_tomcat_scheme': os.environ.get('CATALINA_CONNECTOR_SCHEME'),
+    'atl_tomcat_contextpath': os.environ.get('CATALINA_CONTEXT_PATH'),
+
+    # Other default vals
+    'atl_tomcat_port': "8090",
+    'atl_tomcat_mgmt_port': "8000",
+    'atl_tomcat_maxthreads': "200",
+    'atl_tomcat_minsparethreads': "10",
+    'atl_tomcat_connectiontimeout': "20000",
+    'atl_tomcat_enablelookups': "false",
+    'atl_tomcat_protocol': "HTTP",
+    'atl_tomcat_redirectport': "8443",
+    'atl_tomcat_acceptcount': "10",
+}
+
+for key, defval in defaults.items():
+    if (key not in env) and defval:
+        env[key] = defval
+
+logging.info("Generating ${CONFLUENCE_INSTALL_DIR}/conf/server.xml")
+print(confluence_install_dir+'/conf/server.xml')
+xml = jenv.get_template('server.xml.j2').render(env)
+out = confluence_install_dir+'/conf/server.xml'
+with open(out, 'w') as fd:
+    fd.write(xml)
+chown_all(out, user, group, 0o640)
+
+
+######################################################################
+# Start Confluence as the correct user
+
+start_cmd = "{}/bin/start-confluence.sh".format(confluence_install_dir)
+if os.getuid() == 0:
+    logging.info("User is currently root. Will change directory ownership to {}:{}, then downgrade permission to {}".format(user, group, user))
+    chown_all(confluence_home, user, group, 0o700)
+
+    cmd = '/bin/su'
+    start_cmd = ' '.join([start_cmd] + sys.argv[1:])
+    args = ['-s /bin/bash', user, '-c', start_cmd]
+else:
+    cmd = start_cmd
+    args = sys.argv[1:]
+
+logging.info("Running Confluence with command '{}', arguments {}".format(cmd, args))
+os.execv(cmd, args)