Bug #16273: SELinux Preventing Foreman Proxy From Starting - SELinux - Foreman

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Bug #16273

closed

SELinux Preventing Foreman Proxy From Starting

Added by Jason Nance over 8 years ago. Updated over 5 years ago.

Status:

Closed

Priority:

Normal

Assignee:

Lukas Zapletal

Category:

Smart proxy

Target version:

Foreman - 1.22.0

Difficulty:

Triaged:

Bugzilla link:

Pull request:

https://github.com/theforeman/foreman-selinux/pull/88

Fixed in Releases:

Foreman - 1.22.0

Found in Releases:

Foreman - 1.12.2

Red Hat JIRA:

Description

Using the foreman-installer options below on a CentOS 7 system that is FreeIPA-joined results in a system where the foreman-proxy service will not start due to SELinux denials.

The SELinux denial is (/var/log/audit/audit.log):

type=AVC msg=audit(1472060581.857:571): avc:  denied  { execmem } for  pid=6134 comm="ruby" scontext=system_u:system_r:foreman_proxy_t:s0 tcontext=system_u:system_r:foreman_proxy_t:s0 tclass=process

If I change SELinux to permissive or create a module using the above AVC and audit2allow the the proxy starts up fine.

foreman-prepare-realm was ran prior to foreman-installer and the keytab copied/chowned/chmoded.

/var/log/foreman-proxy/proxy.log says (with log level set to ERROR):

E, [2016-08-24T11:06:37.947836 #12515] ERROR -- : Error during startup, terminating. ^P|<BC>d<89>^?

The binary bits on the end change every time you attempt to start.

/var/log/foreman-proxy/proxy.log says (with log level set to DEBUG):

D, [2016-08-24T12:39:18.361200 #5987] DEBUG -- : Rack::Handler::WEBrick is mounted on /.
I, [2016-08-24T12:39:18.361334 #5987]  INFO -- : WEBrick::HTTPServer#start: pid=5987 port=9090
I, [2016-08-24T12:40:14.100128 #5987]  INFO -- : going to shutdown ...
I, [2016-08-24T12:40:14.100252 #5987]  INFO -- : WEBrick::HTTPServer#start done.
D, [2016-08-24T12:43:01.274047 #6134] DEBUG -- : 'pulp' settings: 'enabled': https, 'mongodb_dir': /var/lib/mongodb (default), 'pulp_content_dir': /var/lib/pulp/content (default), 'pulp_dir': /var/lib/pulp (default), 'pulp_url': https://katello.tresgeek.org/pulp
D, [2016-08-24T12:43:01.275746 #6134] DEBUG -- : 'openscap' settings: 'contentdir': /var/lib/foreman-proxy/openscap/content, 'enabled': https, 'failed_dir': /var/lib/foreman-proxy/openscap/failed, 'openscap_send_log_file': /var/log/foreman-proxy/openscap-send.log, 'reportsdir': /var/lib/foreman-proxy/openscap/reports, 'spooldir': /var/spool/foreman-proxy/openscap (default)
D, [2016-08-24T12:43:01.277179 #6134] DEBUG -- : 'dynflow' settings: 'console_auth': true (default), 'database': /var/lib/foreman-proxy/dynflow/dynflow.sqlite (default), 'enabled': https
D, [2016-08-24T12:43:01.278562 #6134] DEBUG -- : 'ssh' settings: 'enabled': https, 'local_working_dir': /var/tmp (default), 'remote_working_dir': /var/tmp (default), 'ssh_identity_key_file': /usr/share/foreman-proxy/.ssh/id_rsa_foreman_proxy, 'ssh_user': root (default)
D, [2016-08-24T12:43:01.281213 #6134] DEBUG -- : 'templates' settings: 'enabled': true, 'template_url': http://katello.tresgeek.org:8000
D, [2016-08-24T12:43:01.282487 #6134] DEBUG -- : 'tftp' settings: 'enabled': https, 'tftproot': /var/lib/tftpboot (default)
D, [2016-08-24T12:43:01.293820 #6134] DEBUG -- : 'puppetca' settings: 'enabled': https, 'puppetdir': /etc/puppet (default), 'ssldir': /var/lib/puppet/ssl (default)
D, [2016-08-24T12:43:01.296520 #6134] DEBUG -- : 'puppet' settings: 'enabled': https, 'puppet_version': 3.8.7, 'use_provider': [:puppet_proxy_legacy]
D, [2016-08-24T12:43:01.318469 #6134] DEBUG -- : 'bmc' settings: 'bmc_default_provider': ipmitool, 'enabled': https
D, [2016-08-24T12:43:01.319993 #6134] DEBUG -- : 'realm' settings: 'enabled': https, 'freeipa_remove_dns': true, 'realm_keytab': /etc/foreman-proxy/freeipa.keytab, 'realm_principal': realm-proxy@TRESGEEK.ORG, 'realm_provider': freeipa (default)
D, [2016-08-24T12:43:01.321260 #6134] DEBUG -- : 'logs' settings: 'enabled': https
D, [2016-08-24T12:43:01.321559 #6134] DEBUG -- : Providers ['puppet_proxy_legacy'] are going to be configured for 'puppet'
D, [2016-08-24T12:43:01.757328 #6134] DEBUG -- : 'puppet_proxy_legacy' settings: 'classes_retriever': cached_legacy_parser, 'environments_retriever': api_v2, 'puppet_conf': /etc/puppet/puppet.conf (default), 'puppet_ssl_ca': /var/lib/puppet/ssl/certs/ca.pem (default), 'puppet_ssl_cert': /var/lib/puppet/ssl/certs/katello.tresgeek.org.pem, 'puppet_ssl_key': /var/lib/puppet/ssl/private_keys/katello.tresgeek.org.pem, 'puppet_url': https://katello.tresgeek.org:8140, 'puppet_version': 3.8.7, 'use_cache': true (default), 'use_provider': [:puppet_proxy_legacy]
I, [2016-08-24T12:43:01.758541 #6134]  INFO -- : Successfully initialized 'pulp'
I, [2016-08-24T12:43:01.758594 #6134]  INFO -- : Successfully initialized 'openscap'
I, [2016-08-24T12:43:01.758633 #6134]  INFO -- : Successfully initialized 'dynflow'
I, [2016-08-24T12:43:01.818792 #6134]  INFO -- : Successfully initialized 'ssh'
I, [2016-08-24T12:43:01.818913 #6134]  INFO -- : Successfully initialized 'foreman_proxy'
I, [2016-08-24T12:43:01.818959 #6134]  INFO -- : Successfully initialized 'templates'
I, [2016-08-24T12:43:01.818999 #6134]  INFO -- : Successfully initialized 'tftp'
I, [2016-08-24T12:43:01.819036 #6134]  INFO -- : Successfully initialized 'puppetca'
I, [2016-08-24T12:43:01.840307 #6134]  INFO -- : Successfully initialized 'puppet_proxy_legacy'
I, [2016-08-24T12:43:01.840429 #6134]  INFO -- : Successfully initialized 'puppet'
I, [2016-08-24T12:43:01.840474 #6134]  INFO -- : Successfully initialized 'bmc'
I, [2016-08-24T12:43:01.840512 #6134]  INFO -- : Successfully initialized 'realm'
D, [2016-08-24T12:43:01.840560 #6134] DEBUG -- : Log buffer API initialized, available capacity: 2000/1000
I, [2016-08-24T12:43:01.840594 #6134]  INFO -- : Successfully initialized 'logs'
E, [2016-08-24T12:43:01.859422 #6134] ERROR -- : Error during startup, terminating. ^P<AC>H<\^?
D, [2016-08-24T12:43:01.859505 #6134] DEBUG -- : ["/usr/share/foreman-proxy/lib/launcher.rb:42:in `instance_eval'", "/usr/share/gems/gems/ffi-1.9.10/lib/ffi/library.rb:263:in `attach_function'", "/usr/share/gems/gems/openscap-0.4.3/lib/openscap/openscap.rb:37:in `<module:OpenSCAP>'", "/usr/share/gems/gems/openscap-0.4.3/lib/openscap/openscap.rb:14:in `<top (required)>'", "/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/share/gems/gems/openscap-0.4.3/lib/openscap.rb:12:in `<top (required)>'", "/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/share/gems/gems/openscap-0.4.3/lib/openscap/source.rb:12:in `<top (required)>'", "/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/share/gems/gems/openscap-0.4.3/lib/openscap/ds/sds.rb:12:in `<top (required)>'", "/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/share/gems/gems/smart_proxy_openscap-0.5.4/lib/smart_proxy_openscap/openscap_content_parser.rb:1:in `<top (required)>'", "/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/share/gems/gems/smart_proxy_openscap-0.5.4/lib/smart_proxy_openscap/openscap_lib.rb:19:in `<top (required)>'", "/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/share/gems/gems/smart_proxy_openscap-0.5.4/lib/smart_proxy_openscap/openscap_api.rb:10:in `<top (required)>'", "/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'", "/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'", "(eval):11:in `block (2 levels) in https_app'", "/usr/share/foreman-proxy/lib/launcher.rb:42:in `instance_eval'", "/usr/share/foreman-proxy/lib/launcher.rb:42:in `block (2 levels) in https_app'", "/usr/share/foreman-proxy/lib/launcher.rb:41:in `each'", "/usr/share/foreman-proxy/lib/launcher.rb:41:in `block in https_app'", "/usr/share/gems/gems/rack-1.6.4/lib/rack/builder.rb:55:in `instance_eval'", "/usr/share/gems/gems/rack-1.6.4/lib/rack/builder.rb:55:in `initialize'", "/usr/share/foreman-proxy/lib/launcher.rb:40:in `new'", "/usr/share/foreman-proxy/lib/launcher.rb:40:in `https_app'", "/usr/share/foreman-proxy/lib/launcher.rb:125:in `launch'", "/usr/share/foreman-proxy/bin/smart-proxy:6:in `<main>'"]

foreman-installer \
  --scenario katello \
  --enable-foreman-plugin-bootdisk \
  --enable-foreman-plugin-default-hostgroup \
  --enable-foreman-plugin-discovery \
  --enable-foreman-plugin-hooks \
  --enable-foreman-plugin-openscap \
  --enable-foreman-plugin-puppetdb \
  --enable-foreman-plugin-remote-execution \
  --enable-foreman-plugin-setup \
  --enable-foreman-plugin-templates \
  --enable-foreman-proxy-plugin-openscap \
  --enable-foreman-proxy-plugin-remote-execution-ssh \
  --foreman-ipa-authentication true \
  --foreman-ipa-manage-sssd true \
  --foreman-puppetrun true \
  --foreman-plugin-discovery-install-images true \
  --foreman-plugin-openscap-configure-openscap-repo true \
  --foreman-proxy-bmc true \
  --foreman-proxy-logs true \
  --foreman-proxy-realm true \
  --foreman-proxy-realm-principal realm-proxy@DOMAIN.COM \
  --foreman-proxy-templates true \
  --foreman-proxy-tftp true

Related issues 2 (0 open — 2 closed)

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Updated by Jason Nance over 8 years ago

FYI, I did run through the "SELinux denials" section on the Foreman troubleshooting page (without my custom module loaded) including a full relabel of the system.

Results of foreman-debug are at http://debugs.theforeman.org/foreman-debug-1D7Ku.tar.xz.

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Updated by Dominic Cleal over 8 years ago

Project changed from Foreman to SELinux
Category set to Smart proxy

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Updated by Lukas Zapletal over 8 years ago

Thanks for the report. For the record, the missing rules are:

#============= foreman_proxy_t ==============
allow foreman_proxy_t autofs_t:dir { getattr search };
allow foreman_proxy_t cgroup_t:dir getattr;
allow foreman_proxy_t cgroup_t:filesystem getattr;
allow foreman_proxy_t configfs_t:dir getattr;
allow foreman_proxy_t configfs_t:filesystem getattr;
allow foreman_proxy_t device_t:filesystem getattr;
allow foreman_proxy_t dosfs_t:dir getattr;
allow foreman_proxy_t dosfs_t:filesystem getattr;
allow foreman_proxy_t efivarfs_t:dir getattr;
allow foreman_proxy_t efivarfs_t:filesystem getattr;
allow foreman_proxy_t fs_t:filesystem getattr;
allow foreman_proxy_t httpd_sys_rw_content_t:dir { getattr search };
allow foreman_proxy_t hugetlbfs_t:dir getattr;
allow foreman_proxy_t hugetlbfs_t:filesystem getattr;
allow foreman_proxy_t mongod_var_lib_t:dir getattr;
allow foreman_proxy_t nfsd_fs_t:dir getattr;
allow foreman_proxy_t nfsd_fs_t:filesystem getattr;
allow foreman_proxy_t postfix_etc_t:dir search;
allow foreman_proxy_t pstore_t:dir getattr;
allow foreman_proxy_t pstore_t:filesystem getattr;
allow foreman_proxy_t self:capability fowner;
allow foreman_proxy_t self:key { write setattr };
allow foreman_proxy_t self:process execmem;
allow foreman_proxy_t sssd_var_lib_t:dir search;
allow foreman_proxy_t sysctl_fs_t:dir search;
allow foreman_proxy_t tmpfs_t:filesystem getattr;
allow foreman_proxy_t var_lib_nfs_t:dir search;

Looks like OpenSCAP plugin's FFI dependency has problems, also something is sniffing around the filesystem, might be also the new inotify capability. We have couple of regressions as SELinux for proxy is turned off by default.

I will fix the bugs and suggest turning it on by default now.

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