Difference between revisions of "App troubleshooting"
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| − | + | Application installs should <u>'''NEVER'''</u> fail. Period. App install failures are high priority to the [https://www.amahi.org/team Amahi Team]. | |
| − | + | = Debugability = | |
| − | + | Debugging app install issues is very important, so any time something permanently destructive is attempted, it should be done with care to preserve the ability to analyze and debug what happened: | |
| − | + | * Preserve as much as possible from the existing (buggy) environment | |
| + | |||
| + | * Make sure httpd configuration is sane (result should be "'''Syntax OK'''"): | ||
| + | httpd -t | ||
| + | |||
| + | * The idea is to not delete anything permanently - copy or move things to, say, a folder in /tmp if you have to get something out of their place. For example: | ||
| + | mkdir /tmp/app-debug/ | ||
| + | |||
| + | * Then add things there as necessary for later analysis, like: | ||
| + | cp -a /var/log/amahi-app-installer.log /tmp/app-debug | ||
| + | cp -a /etc/httpd/conf.d /tmp/app-debug | ||
| + | |||
| + | The user can provide this information: | ||
| + | * Copy of the app install log: | ||
| + | <blockquote><u>Fedora</u></blockquote> | ||
| + | tail -300 /var/log/amahi-app-installer.log | fpaste | ||
| + | |||
| + | <blockquote><u>Ubuntu</u></blockquote> | ||
| + | tail -300 /var/log/amahi-app-installer.log | apaste | ||
| + | |||
| + | * Copy of the app error and access logs (i.e. Adminer is the app): | ||
| + | cat /var/hda/web-apps/adminer/logs/error.log | ||
| + | cat /var/hda/web-apps/adminer/logs/access.log | ||
| + | |||
| + | * To check if process is running (i.e. sab is the app): | ||
| + | <blockquote><u>Fedora</u></blockquote> | ||
| + | ps guax | grep sab | fpaste | ||
| + | |||
| + | <blockquote><u>Ubuntu</u></blockquote> | ||
| + | ps guax | grep sab | apaste | ||
Latest revision as of 23:08, 6 August 2014
Application installs should NEVER fail. Period. App install failures are high priority to the Amahi Team.
Debugability
Debugging app install issues is very important, so any time something permanently destructive is attempted, it should be done with care to preserve the ability to analyze and debug what happened:
- Preserve as much as possible from the existing (buggy) environment
- Make sure httpd configuration is sane (result should be "Syntax OK"):
httpd -t
- The idea is to not delete anything permanently - copy or move things to, say, a folder in /tmp if you have to get something out of their place. For example:
mkdir /tmp/app-debug/
- Then add things there as necessary for later analysis, like:
cp -a /var/log/amahi-app-installer.log /tmp/app-debug cp -a /etc/httpd/conf.d /tmp/app-debug
The user can provide this information:
- Copy of the app install log:
Fedora
tail -300 /var/log/amahi-app-installer.log | fpaste
Ubuntu
tail -300 /var/log/amahi-app-installer.log | apaste
- Copy of the app error and access logs (i.e. Adminer is the app):
cat /var/hda/web-apps/adminer/logs/error.log cat /var/hda/web-apps/adminer/logs/access.log
- To check if process is running (i.e. sab is the app):
Fedora
ps guax | grep sab | fpaste
Ubuntu
ps guax | grep sab | apaste
