Zabbix Frontend fails install with PHP7.0 due to always_populate_raw_post_data configuration

[ironstorm]

[Impact]

 * The zabbix web frontend has one incompatibility and some missing dependencies with PHP7.0.

 * End-users are unable to use the web-frontend due to these issues.

[Test Case]

 * Install zabbix-frontend-php. Without the fix, the frontend will not load properly. With the fix, it will.

[Regression Potential]

 * The code change is identical to the upstream change; given that the frontend won't load with the code as-is, I believe there is no regression potential there.

 * The dependency changes allow for the web frontend to work properly without extra packages needing to be manually installed by end-users. Again, no chance for regression.

---

always_populate_raw_post_data was deprecated in PHP 5.3 at which time zabbix frontend setup began to insist that it be set to always_populate_raw_post_data = -1 in the PHP.ini

In PHP 7.0, which Ubuntu 16.04 LTS ships with, always_populate_raw_post_data has been removed completely. Due to this PHP frontend setup gets stuck on always_populate_raw_post_data not being disabled.

The solution is to apply the following patch to the PHP frontend code to ignore PHP 7.0:

--- /usr/share/zabbix/include/classes/setup/CFrontendSetup.php 2016-04-21 01:06:25.603388814 -0400
+++ /usr/share/zabbix/include/classes/setup/CFrontendSetup.php 2016-04-21 01:06:59.980485531 -0400
@@ -72,7 +72,7 @@
                }

                // check for deprecated PHP 5.6.0 option 'always_populate_raw_post_data'
- if (version_compare(PHP_VERSION, '5.6', '>=')) {
+ if (version_compare(PHP_VERSION, '5.6', '>=') && version_compare(PHP_VERSION, '7.0', '<') ) {
                        $result[] = $this->checkPhpAlwaysPopulateRawPostData();
                }
                $result[] = $this->checkPhpSockets();

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "Ignore removed flag always_populate_raw_post_data for versions of PHP > 7.0" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Nish Aravamudan (nacc)]

This has been fixed in the 16.10 version (1:3.0.3+dfsg-1) as the upstream fix went in 3.0.2-rc1.

[Nish Aravamudan (nacc)]

I have pushed a test build to: https://launchpad.net/~nacc/+archive/ubuntu/zabbix.

Please test the version there (2.4.7+dfsg-2ubuntu3~ppa1), if you are affected. This should install the correct dependencies and avoid the issue in bug 1572841 for the web frontend.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Martin Pitt (pitti)]

Hello ironstorm, or anyone else affected,

Accepted zabbix into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/zabbix/1:2.4.7+dfsg-2ubuntu2.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

[Nish Aravamudan (nacc)]

Verified on 2.4.7+dfsg-2ubuntu2.1

[Chris J Arges (arges)]

The verification of the Stable Release Update for zabbix has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

[Launchpad Janitor (janitor)]

This bug was fixed in the package zabbix - 1:2.4.7+dfsg-2ubuntu2.1

---------------
zabbix (1:2.4.7+dfsg-2ubuntu2.1) xenial; urgency=medium

  * d/control: add dependencies on split-out PHP7 packages (bcmath,
    mbstring, xml) needed by web frontend (LP: #1571534, .
  * debian/patches/always_populate_raw_post_data_not_in_php7.patch:
    Backport '[ZBX-9659] changed setup condition for checking
    always_populate_raw_post_data'. Closes LP: #1572841.

 -- Nishanth Aravamudan <email address hidden> Mon, 27 Jun 2016 17:03:29 -0700