Bug 1316975 - Need policy for aos hostmount-anyuid to access host mounted volumes
Need policy for aos hostmount-anyuid to access host mounted volumes
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: selinux-policy (Show other bugs)
All Linux
unspecified Severity unspecified
: rc
: ---
Assigned To: Miroslav Grepl
Milos Malik
Depends On:
  Show dependency treegraph
Reported: 2016-03-11 10:17 EST by Rich Megginson
Modified: 2016-05-04 10:16 EDT (History)
8 users (show)

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Doc Type: Bug Fix
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Last Closed: 2016-05-04 10:16:13 EDT
Type: Bug
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RHEL 7.3 requirements from Atomic Host:
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Description Rich Megginson 2016-03-11 10:17:23 EST
Description of problem:
The AOS origin-aggregated-logging fluentd component needs to mount /var/log, needs to be able to read /var/log/message* and /var/log/containers/*, and needs to be able to create and write files in /var/log.

We used to do this by making the fluentd container privileged, and adding the fluentd system user to the aos scc privileged.  However, it was felt that this granted too much access to the fluentd container, and instead fluentd should use the least permissive access, which is scc hostmount-anyuid.  But when fluentd is configured with this scc, the fluentd container cannot access /var/log on the host.

More information is in https://github.com/openshift/origin-aggregated-logging/issues/89

Version-Release number of selected component (if applicable):

# more /etc/redhat-release 
CentOS Linux release 7.2.1511 (Core) 
# rpm -q selinux-policy
# oc version
oc v1.1.3
kubernetes v1.2.0-origin

How reproducible:

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Additional info:
Comment 2 Paul Morie 2016-03-11 10:26:31 EST
To recap discussion from email, we discussed:

1.  Making hostmount-anyuid use spc_t
2.  Making hostmount-anyuid use another selinux type which is similar to svirt_lxc_net_t, but allows access to /var/log

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