Chapter 6. File Integrity Operator

The following advisory is available for the OpenShift File Integrity Operator 1.3.4:

The following advisory is available for the OpenShift File Integrity Operator 1.3.3:

This update addresses a CVE in an underlying dependency.

The following advisory is available for the OpenShift File Integrity Operator 1.3.2:

This update addresses a CVE in an underlying dependency.

The following advisory is available for the OpenShift File Integrity Operator 1.3.1:

The following advisory is available for the OpenShift File Integrity Operator 1.2.1:

The following advisory is available for the OpenShift File Integrity Operator 1.2.0:

The following advisory is available for the OpenShift File Integrity Operator 1.0.0:

The following advisory is available for the OpenShift File Integrity Operator 0.1.32:

The following advisory is available for the OpenShift File Integrity Operator 0.1.30:

The following advisory is available for the OpenShift File Integrity Operator 0.1.24:

The following advisory is available for the OpenShift File Integrity Operator 0.1.22:

The following advisory is available for the OpenShift File Integrity Operator 0.1.21:

The File Integrity Operator is a "Rolling Stream" Operator, meaning updates are available asynchronously of OpenShift Container Platform releases. For more information, see OpenShift Operator Life Cycles on the Red Hat Customer Portal.

If you experience difficulty with a procedure described in this documentation, or with OpenShift Container Platform in general, visit the Red Hat Customer Portal.

From the Customer Portal, you can:

To identify issues with your cluster, you can use Insights in OpenShift Cluster Manager. Insights provides details about issues and, if available, information on how to solve a problem.

If you have a suggestion for improving this documentation or have found an error, submit a Jira issue for the most relevant documentation component. Please provide specific details, such as the section name and OpenShift Container Platform version.

If the Operator is not installed successfully:

The subscription of an installed Operator specifies an update channel that tracks and receives updates for the Operator. You can change the update channel to start tracking and receiving updates from a newer channel.

The names of update channels in a subscription can differ between Operators, but the naming scheme typically follows a common convention within a given Operator. For example, channel names might follow a minor release update stream for the application provided by the Operator (1.2, 1.3) or a release frequency (stable, fast).

Red Hat Customer Portal Labs include the following application that helps administrators prepare to update their Operators:

You can use the application to search for Operator Lifecycle Manager-based Operators and verify the available Operator version per update channel across different versions of OpenShift Container Platform. Cluster Version Operator-based Operators are not included.

You can change the update channel for an Operator by using the OpenShift Container Platform web console.

If an installed Operator has the approval strategy in its subscription set to Manual, when new updates are released in its current update channel, the update must be manually approved before installation can begin.

An instance of a FileIntegrity custom resource (CR) represents a set of continuous file integrity scans for one or more nodes.

Each FileIntegrity CR is backed by a daemon set running AIDE on the nodes matching the FileIntegrity CR specification.

The FileIntegrity custom resource (CR) reports its status through the .status.phase subresource.

The scan results of the FileIntegrity CR are reported in another object called FileIntegrityNodeStatuses.

$ oc get fileintegritynodestatuses

NAME                                                AGE
worker-fileintegrity-ip-10-0-130-192.ec2.internal   101s
worker-fileintegrity-ip-10-0-147-133.ec2.internal   109s
worker-fileintegrity-ip-10-0-165-160.ec2.internal   102s

There is one result object per node. The nodeName attribute of each FileIntegrityNodeStatus object corresponds to the node being scanned. The status of the file integrity scan is represented in the results array, which holds scan conditions.

$ oc get fileintegritynodestatuses.fileintegrity.openshift.io -ojsonpath='{.items[*].results}' | jq

The fileintegritynodestatus object reports the latest status of an AIDE run and exposes the status as Failed, Succeeded, or Errored in a status field.

$ oc get fileintegritynodestatuses -w

NAME                                                               NODE                                         STATUS
example-fileintegrity-ip-10-0-134-186.us-east-2.compute.internal   ip-10-0-134-186.us-east-2.compute.internal   Succeeded
example-fileintegrity-ip-10-0-150-230.us-east-2.compute.internal   ip-10-0-150-230.us-east-2.compute.internal   Succeeded
example-fileintegrity-ip-10-0-169-137.us-east-2.compute.internal   ip-10-0-169-137.us-east-2.compute.internal   Succeeded
example-fileintegrity-ip-10-0-180-200.us-east-2.compute.internal   ip-10-0-180-200.us-east-2.compute.internal   Succeeded
example-fileintegrity-ip-10-0-194-66.us-east-2.compute.internal    ip-10-0-194-66.us-east-2.compute.internal    Failed
example-fileintegrity-ip-10-0-222-188.us-east-2.compute.internal   ip-10-0-222-188.us-east-2.compute.internal   Succeeded
example-fileintegrity-ip-10-0-134-186.us-east-2.compute.internal   ip-10-0-134-186.us-east-2.compute.internal   Succeeded
example-fileintegrity-ip-10-0-222-188.us-east-2.compute.internal   ip-10-0-222-188.us-east-2.compute.internal   Succeeded
example-fileintegrity-ip-10-0-194-66.us-east-2.compute.internal    ip-10-0-194-66.us-east-2.compute.internal    Failed
example-fileintegrity-ip-10-0-150-230.us-east-2.compute.internal   ip-10-0-150-230.us-east-2.compute.internal   Succeeded
example-fileintegrity-ip-10-0-180-200.us-east-2.compute.internal   ip-10-0-180-200.us-east-2.compute.internal   Succeeded

These conditions are reported in the results array of the corresponding FileIntegrityNodeStatus CR status:

[
  {
    "condition": "Succeeded",
    "lastProbeTime": "2020-09-15T12:45:57Z"
  }
]
[
  {
    "condition": "Succeeded",
    "lastProbeTime": "2020-09-15T12:46:03Z"
  }
]
[
  {
    "condition": "Succeeded",
    "lastProbeTime": "2020-09-15T12:45:48Z"
  }
]

$ oc debug node/ip-10-0-130-192.ec2.internal

Creating debug namespace/openshift-debug-node-ldfbj ...
Starting pod/ip-10-0-130-192ec2internal-debug ...
To use host binaries, run `chroot /host`
Pod IP: 10.0.130.192
If you don't see a command prompt, try pressing enter.
sh-4.2# echo "# integrity test" >> /host/etc/resolv.conf
sh-4.2# exit

Removing debug pod ...
Removing debug namespace/openshift-debug-node-ldfbj ...

$ oc get fileintegritynodestatuses.fileintegrity.openshift.io/worker-fileintegrity-ip-10-0-130-192.ec2.internal -ojsonpath='{.results}' | jq -r

$ oc get fileintegritynodestatuses.fileintegrity.openshift.io -ojsonpath='{.items[*].results}' | jq

[
  {
    "condition": "Succeeded",
    "lastProbeTime": "2020-09-15T12:54:14Z"
  },
  {
    "condition": "Failed",
    "filesChanged": 1,
    "lastProbeTime": "2020-09-15T12:57:20Z",
    "resultConfigMapName": "aide-ds-worker-fileintegrity-ip-10-0-130-192.ec2.internal-failed",
    "resultConfigMapNamespace": "openshift-file-integrity"
  }
]

$ oc describe cm aide-ds-worker-fileintegrity-ip-10-0-130-192.ec2.internal-failed

Name:         aide-ds-worker-fileintegrity-ip-10-0-130-192.ec2.internal-failed
Namespace:    openshift-file-integrity
Labels:       file-integrity.openshift.io/node=ip-10-0-130-192.ec2.internal
              file-integrity.openshift.io/owner=worker-fileintegrity
              file-integrity.openshift.io/result-log=
Annotations:  file-integrity.openshift.io/files-added: 0
              file-integrity.openshift.io/files-changed: 1
              file-integrity.openshift.io/files-removed: 0

Data

integritylog:
------
AIDE 0.15.1 found differences between database and filesystem!!
Start timestamp: 2020-09-15 12:58:15

Summary:
  Total number of files:  31553
  Added files:                0
  Removed files:            0
  Changed files:            1


---------------------------------------------------
Changed files:
---------------------------------------------------

changed: /hostroot/etc/resolv.conf

---------------------------------------------------
Detailed information about changes:
---------------------------------------------------


File: /hostroot/etc/resolv.conf
 SHA512   : sTQYpB/AL7FeoGtu/1g7opv6C+KT1CBJ , qAeM+a8yTgHPnIHMaRlS+so61EN8VOpg

Events:  <none>

Transitions in the status of the FileIntegrity and FileIntegrityNodeStatus objects are logged by events. The creation time of the event reflects the latest transition, such as Initializing to Active, and not necessarily the latest scan result. However, the newest event always reflects the most recent status.

$ oc get events --field-selector reason=FileIntegrityStatus

LAST SEEN   TYPE     REASON                OBJECT                                MESSAGE
97s         Normal   FileIntegrityStatus   fileintegrity/example-fileintegrity   Pending
67s         Normal   FileIntegrityStatus   fileintegrity/example-fileintegrity   Initializing
37s         Normal   FileIntegrityStatus   fileintegrity/example-fileintegrity   Active

When a node scan fails, an event is created with the add/changed/removed and config map information.

$ oc get events --field-selector reason=NodeIntegrityStatus

LAST SEEN   TYPE      REASON                OBJECT                                MESSAGE
114m        Normal    NodeIntegrityStatus   fileintegrity/example-fileintegrity   no changes to node ip-10-0-134-173.ec2.internal
114m        Normal    NodeIntegrityStatus   fileintegrity/example-fileintegrity   no changes to node ip-10-0-168-238.ec2.internal
114m        Normal    NodeIntegrityStatus   fileintegrity/example-fileintegrity   no changes to node ip-10-0-169-175.ec2.internal
114m        Normal    NodeIntegrityStatus   fileintegrity/example-fileintegrity   no changes to node ip-10-0-152-92.ec2.internal
114m        Normal    NodeIntegrityStatus   fileintegrity/example-fileintegrity   no changes to node ip-10-0-158-144.ec2.internal
114m        Normal    NodeIntegrityStatus   fileintegrity/example-fileintegrity   no changes to node ip-10-0-131-30.ec2.internal
87m         Warning   NodeIntegrityStatus   fileintegrity/example-fileintegrity   node ip-10-0-152-92.ec2.internal has changed! a:1,c:1,r:0 \ log:openshift-file-integrity/aide-ds-example-fileintegrity-ip-10-0-152-92.ec2.internal-failed

Changes to the number of added, changed, or removed files results in a new event, even if the status of the node has not transitioned.

$ oc get events --field-selector reason=NodeIntegrityStatus

LAST SEEN   TYPE      REASON                OBJECT                                MESSAGE
114m        Normal    NodeIntegrityStatus   fileintegrity/example-fileintegrity   no changes to node ip-10-0-134-173.ec2.internal
114m        Normal    NodeIntegrityStatus   fileintegrity/example-fileintegrity   no changes to node ip-10-0-168-238.ec2.internal
114m        Normal    NodeIntegrityStatus   fileintegrity/example-fileintegrity   no changes to node ip-10-0-169-175.ec2.internal
114m        Normal    NodeIntegrityStatus   fileintegrity/example-fileintegrity   no changes to node ip-10-0-152-92.ec2.internal
114m        Normal    NodeIntegrityStatus   fileintegrity/example-fileintegrity   no changes to node ip-10-0-158-144.ec2.internal
114m        Normal    NodeIntegrityStatus   fileintegrity/example-fileintegrity   no changes to node ip-10-0-131-30.ec2.internal
87m         Warning   NodeIntegrityStatus   fileintegrity/example-fileintegrity   node ip-10-0-152-92.ec2.internal has changed! a:1,c:1,r:0 \ log:openshift-file-integrity/aide-ds-example-fileintegrity-ip-10-0-152-92.ec2.internal-failed
40m         Warning   NodeIntegrityStatus   fileintegrity/example-fileintegrity   node ip-10-0-152-92.ec2.internal has changed! a:3,c:1,r:0 \ log:openshift-file-integrity/aide-ds-example-fileintegrity-ip-10-0-152-92.ec2.internal-failed

As with any Kubernetes custom resources (CRs), you can run oc explain fileintegrity, and then look at the individual attributes using:

$ oc explain fileintegrity.spec

$ oc explain fileintegrity.spec.config

The default File Integrity Operator configuration is stored in a config map with the same name as the FileIntegrity CR.

Below is an excerpt from the aide.conf key of the config map:

@@define DBDIR /hostroot/etc/kubernetes
@@define LOGDIR /hostroot/etc/kubernetes
database=file:@@{DBDIR}/aide.db.gz
database_out=file:@@{DBDIR}/aide.db.gz
gzip_dbout=yes
verbose=5
report_url=file:@@{LOGDIR}/aide.log
report_url=stdout
PERMS = p+u+g+acl+selinux+xattrs
CONTENT_EX = sha512+ftype+p+u+g+n+acl+selinux+xattrs

/hostroot/boot/    	CONTENT_EX
/hostroot/root/\..* PERMS
/hostroot/root/   CONTENT_EX

The default configuration for a FileIntegrity instance provides coverage for files under the following directories:

The following directories are not covered:

Any entries that configure AIDE internal behavior such as DBDIR, LOGDIR, database, and database_out are overwritten by the Operator. The Operator would add a prefix to /hostroot/ before all paths to be watched for integrity changes. This makes reusing existing AIDE configs that might often not be tailored for a containerized environment and start from the root directory easier.

This example focuses on defining a custom configuration for a scanner that runs on the control plane nodes based on the default configuration provided for the worker-fileintegrity CR. This workflow might be useful if you are planning to deploy a custom software running as a daemon set and storing its data under /opt/mydaemon on the control plane nodes.

To change the File Integrity configuration, never change the generated config map. Instead, change the config map that is linked to the FileIntegrity object through the spec.name, namespace, and key attributes.

If the File Integrity Operator detects a change that was planned, it might be required to reinitialize the database.

In OpenShift Container Platform 4, the cluster node configuration is delivered through MachineConfig objects. You can assume that the changes to files that are caused by a MachineConfig object are expected and should not cause the file integrity scan to fail. To suppress changes to files caused by MachineConfig object updates, the File Integrity Operator watches the node objects; when a node is being updated, the AIDE scans are suspended for the duration of the update. When the update finishes, the database is reinitialized and the scans resume.

This pause and resume logic only applies to updates through the MachineConfig API, as they are reflected in the node object annotations.

Each FileIntegrity object represents a scan on a number of nodes. The scan itself is performed by pods managed by a daemon set.

To find the daemon set that represents a FileIntegrity object, run:

$ oc -n openshift-file-integrity get ds/aide-worker-fileintegrity

To list the pods in that daemon set, run:

$ oc -n openshift-file-integrity get pods -lapp=aide-worker-fileintegrity

To view logs of a single AIDE pod, call oc logs on one of the pods.

$ oc -n openshift-file-integrity logs pod/aide-worker-fileintegrity-mr8x6

Starting the AIDE runner daemon
initializing AIDE db
initialization finished
running aide check
...

The config maps created by the AIDE daemon are not retained and are deleted after the File Integrity Operator processes them. However, on failure and error, the contents of these config maps are copied to the config map that the FileIntegrityNodeStatus object points to.