Apache2 doesn't start, mod_proxy-html errors.

[virtadpt]

Error message:

Syntax error on line 31 of /etc/apache2/conf.d/proxy-html.conf:
Invalid command 'ProxyHTMLLinks', perhaps misspelled or defined by a module
not included in the server configuration.

[virtadpt]

Need to install the package libapache2-mod-proxy-html from Debian's package repo.

Need to run a2enmod proxy_html to enable mod_proxy_html.

Syntax error on line 92 of /etc/apache2/conf.d/proxy-html.conf:
Invalid command 'ProxyRequests', perhaps misspelled or defined by a module
not included in the server configuration.

[virtadpt]

Added libapache2-mod-proxy-html to the list of packages that need to be installed. Commit: 0c9a69e7ffb5e88baccd5c58c4b93e1710f57e4a

[virtadpt]

Recommended fix: a2enmod proxy to enable mod_proxy.

Source: http://last-error-message.blogspot.com/2011/02/invalid-command-proxyrequests.html

[virtadpt]

sudo a2enmod proxy was successful. New error message:

Syntax error on line 111 of /etc/apache2/conf.d/proxy-html.conf:
Invalid command 'RequestHeader', perhaps misspelled or defined by a module not included in the
server configuration
Action 'start' failed.

[virtadpt]

sudo a2enmod headers was successful. New error message:

(98)Address already in use: make_sock: could not bind to address 0.0.0.0:443
no listening sockets available, shutting down

Fixed in commit 89b545ddc573b139a5b38f6309b7cb2a10823150.

[virtadpt]

New error message:

The Apache error log may have more information.
failed!

/var/log/apache2/error.log says:

(2)No such file or directory: apache2: could not open error log file /var/log/httpd/ssl_error_log.
Unable to open logs

That needs to be /var/log/apache2.

Fixed in commit 5a9c88cc2a6c5b53537a0f28b410f1ab9ba98a35.

[virtadpt]

New problem. In /var/log/apache2/ssl_error_log:

[Mon Sep 16 19:18:19 2013] [error] (2)No such file or directory: could not open transfer log file /var/log/httpd/ssl_request_log.

Fixed in commit b376ff6e6eca85cb7dd306ef86c4fc99b3f1adf4.

[virtadpt]

One more bug, though it doesn't prevent Apache from starting:

Starting web server: apache2Warning: DocumentRoot [/srv/httpd/htdocs] does not exist

/srv/httpd/htdocs does not, in fact, exist.

[virtadpt]

Fixed by editing /etc/apache2/conf.d/httpd-ssl.conf, directive DocumentRoot. Should be set to "/var/www".

Fixed in commit 88637a946918931aa2e2cdb1b95427a446d26417.

Works now.