Dependency error on nginx while trying yum update

OsakaWebbie · 03-15-2020, 11:07 PM

After ages ignoring my VPS (CentOS 7.4.1708), I decided I should do `yum update`. (Yeah, yeah, I know I should do it more often.)

It spewed through the dependency checks of a ton of stuff, and then got to nginx and said this:

Code:

---> Package nginx-all-modules.noarch 1:1.10.2-1.el7 will be updated
--> Processing Dependency: nginx-all-modules = 1:1.10.2-1.el7 for package: 1:nginx-1.10.2-1.el7.x86_64
---> Package nginx-filesystem.noarch 1:1.10.2-1.el7 will be updated
--> Processing Dependency: nginx-filesystem = 1:1.10.2-1.el7 for package: 1:nginx-1.10.2-1.el7.x86_64
--> Finished Dependency Resolution
Error: Package: 1:nginx-1.10.2-1.el7.x86_64 (@epel)
           Requires: nginx-all-modules = 1:1.10.2-1.el7
           Removing: 1:nginx-all-modules-1.10.2-1.el7.noarch (@epel)
               nginx-all-modules = 1:1.10.2-1.el7
           Updated By: 1:nginx-all-modules-1.16.1-1.el7.noarch (epel)
               nginx-all-modules = 1:1.16.1-1.el7
Error: Package: 1:nginx-1.10.2-1.el7.x86_64 (@epel)
           Requires: nginx-filesystem = 1:1.10.2-1.el7
           Removing: 1:nginx-filesystem-1.10.2-1.el7.noarch (@epel)
               nginx-filesystem = 1:1.10.2-1.el7
           Updated By: 1:nginx-filesystem-1.16.1-1.el7.noarch (epel)
               nginx-filesystem = 1:1.16.1-1.el7
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

--skip-broken sounds more like a bandaid than a solution, and I don't know what the second suggested command does.

Found advice on the web to first run `yum makecache fast` and try again. No change.

Found other advice on the web to run `rpm -qa | grep 'the-package-in-question'`, but I have no idea how to interpret the output:

Code:

$ rpm -qa | grep 'nginx'
nginx-mod-http-xslt-filter-1.10.2-1.el7.x86_64
nginx-mod-http-image-filter-1.10.2-1.el7.x86_64
python2-certbot-nginx-0.27.1-1.el7.noarch
nginx-filesystem-1.10.2-1.el7.noarch
nginx-mod-http-perl-1.10.2-1.el7.x86_64
nginx-mod-stream-1.10.2-1.el7.x86_64
nginx-mod-mail-1.10.2-1.el7.x86_64
nginx-1.10.2-1.el7.x86_64
nginx-mod-http-geoip-1.10.2-1.el7.x86_64
nginx-all-modules-1.10.2-1.el7.noarch

Obviously I don't want to do something stupid and break my webserver. Can someone recommend a course of action, or recognize the problem by looking at the above bits of output? I'm really terrible at this kind of thing - I'm a developer, not a server admin.

scasey · 03-15-2020, 11:39 PM

I'd probably run

Code:

yum check-update

first to see what the state of things are now.
then I'd look at man yum to find out what that second option is going to do.

AFAIK, --skip-broken is less of a "bandaid" and more about just not trying to resolve the problem:

Code:

--skip-broken         skip packages with depsolving problems

And yes, staying current on updates is best.

OsakaWebbie · 03-16-2020, 01:31 AM

Quote:

I'd probably run yum check-update first to see what the state of things are now.

What am I looking for? The nginx part of the output of yum check-update is as follows:

Code:

nginx-all-modules.noarch                    1:1.16.1-1.el7          epel
nginx-filesystem.noarch                     1:1.16.1-1.el7          epel
nginx-mod-http-image-filter.x86_64          1:1.16.1-1.el7          epel
nginx-mod-http-perl.x86_64                  1:1.16.1-1.el7          epel
nginx-mod-http-xslt-filter.x86_64           1:1.16.1-1.el7          epel
nginx-mod-mail.x86_64                       1:1.16.1-1.el7          epel
nginx-mod-stream.x86_64                     1:1.16.1-1.el7          epel

Quote:

then I'd look at man yum to find out what that second option is going to do.

man yum does not mention either --nofiles or --nodigest. I checked both on my server and http://man7.org/linux/man-pages/man8/yum.8.html

OsakaWebbie · 03-16-2020, 01:41 AM

Oh, I just noticed that the command suggesting --nofiles --nodigest is rpm, not yum. But it sounds like just as much of a non-solution as the first one. From man rpm:

Quote:

--nodigest
Don't verify package or header digests when reading.
--nofiles
Don't verify any attributes of package files.

scasey · 03-16-2020, 01:49 AM

Sorry about not paying attention...
I’m not sure either is a “non-solution.” But, I don’t use nginx and I don’t skip updates, so maybe we should wait for someone else to jump in here...
I’d back up the installation and pull the trigger at o’dark-30 some Sunday morning, but that’s just me.