Chapter 6. File Integrity Operator 6.1. File Integrity Operator release notes The File Integrity Operator for OpenShift Container Platform continually runs file integrity checks on RHCOS nodes. These release notes track the development of the File Integrity Operator in the OpenShift Container Platform. For an overview of the File Integrity Operator, see Understanding the File Integrity Operator . To access the latest release, see Updating the File Integrity Operator . 6.1.1. OpenShift File Integrity Operator 1.2.1 The following advisory is available for the OpenShift File Integrity Operator 1.2.1: RHBA-2023:1684 OpenShift File Integrity Operator Bug Fix Update This release includes updated container dependencies. 6.1.2. OpenShift File Integrity Operator 1.2.0 The following advisory is available for the OpenShift File Integrity Operator 1.2.0: RHBA-2023:1273 OpenShift File Integrity Operator Enhancement Update 6.1.2.1. New features and enhancements The File Integrity Operator Custom Resource (CR) now contains an initialDelay feature that specifies the number of seconds to wait before starting the first AIDE integrity check. For more information, see Creating the FileIntegrity custom resource . The File Integrity Operator is now stable and the release channel is upgraded to stable . Future releases will follow Semantic Versioning . To access the latest release, see Updating the File Integrity Operator . 6.1.3. OpenShift File Integrity Operator 1.0.0 The following advisory is available for the OpenShift File Integrity Operator 1.0.0: RHBA-2023:0037 OpenShift File Integrity Operator Bug Fix Update 6.1.4. OpenShift File Integrity Operator 0.1.32 The following advisory is available for the OpenShift File Integrity Operator 0.1.32: RHBA-2022:7095 OpenShift File Integrity Operator Bug Fix Update 6.1.4.1. Bug fixes Previously, alerts issued by the File Integrity Operator did not set a namespace, making it difficult to understand from which namespace the alert originated. Now, the Operator sets the appropriate namespace, providing more information about the alert. ( BZ#2112394 ) Previously, The File Integrity Operator did not update the metrics service on Operator startup, causing the metrics targets to be unreachable. With this release, the File Integrity Operator now ensures the metrics service is updated on Operator startup. ( BZ#2115821 ) 6.1.5. OpenShift File Integrity Operator 0.1.30 The following advisory is available for the OpenShift File Integrity Operator 0.1.30: RHBA-2022:5538 OpenShift File Integrity Operator Bug Fix and Enhancement Update 6.1.5.1. Bug fixes Previously, alerts issued by the File Integrity Operator did not set a namespace, making it difficult to understand where the alert originated. Now, the Operator sets the appropriate namespace, increasing understanding of the alert. ( BZ#2101393 ) 6.1.6. OpenShift File Integrity Operator 0.1.24 The following advisory is available for the OpenShift File Integrity Operator 0.1.24: RHBA-2022:1331 OpenShift File Integrity Operator Bug Fix 6.1.6.1. New features and enhancements You can now configure the maximum number of backups stored in the FileIntegrity Custom Resource (CR) with the config.maxBackups attribute. This attribute specifies the number of AIDE database and log backups left over from the re-init process to keep on the node. Older backups beyond the configured number are automatically pruned. The default is set to five backups. 6.1.6.2. Bug fixes Previously, upgrading the Operator from versions older than 0.1.21 to 0.1.22 could cause the re-init feature to fail. This was a result of the Operator failing to update configMap resource labels. Now, upgrading to the latest version fixes the resource labels. ( BZ#2049206 ) Previously, when enforcing the default configMap script contents, the wrong data keys were compared. This resulted in the aide-reinit script not being updated properly after an Operator upgrade, and caused the re-init process to fail. Now, daemonSets run to completion and the AIDE database re-init process executes successfully. ( BZ#2072058 ) 6.1.7. OpenShift File Integrity Operator 0.1.22 The following advisory is available for the OpenShift File Integrity Operator 0.1.22: RHBA-2022:0142 OpenShift File Integrity Operator Bug Fix 6.1.7.1. Bug fixes Previously, a system with a File Integrity Operator installed might interrupt the OpenShift Container Platform update, due to the /etc/kubernetes/aide.reinit file. This occurred if the /etc/kubernetes/aide.reinit file was present, but later removed prior to the ostree validation. With this update, /etc/kubernetes/aide.reinit is moved to the /run directory so that it does not conflict with the OpenShift Container Platform update. ( BZ#2033311 ) 6.1.8. OpenShift File Integrity Operator 0.1.21 The following advisory is available for the OpenShift File Integrity Operator 0.1.21: RHBA-2021:4631 OpenShift File Integrity Operator Bug Fix and Enhancement Update 6.1.8.1. New features and enhancements The metrics related to FileIntegrity scan results and processing metrics are displayed on the monitoring dashboard on the web console. The results are labeled with the prefix of file_integrity_operator_ . If a node has an integrity failure for more than 1 second, the default PrometheusRule provided in the operator namespace alerts with a warning. The following dynamic Machine Config Operator and Cluster Version Operator related filepaths are excluded from the default AIDE policy to help prevent false positives during node updates: /etc/machine-config-daemon/currentconfig /etc/pki/ca-trust/extracted/java/cacerts /etc/cvo/updatepayloads /root/.kube The AIDE daemon process has stability improvements over v0.1.16, and is more resilient to errors that might occur when the AIDE database is initialized. 6.1.8.2. Bug fixes Previously, when the Operator automatically upgraded, outdated daemon sets were not removed. With this release, outdated daemon sets are removed during the automatic upgrade. 6.1.9. Additional resources Understanding the File Integrity Operator 6.2. Installing the File Integrity Operator 6.2.1. Installing the File Integrity Operator using the web console Prerequisites You must have admin privileges. Procedure In the OpenShift Container Platform web console, navigate to Operators OperatorHub . Search for the File Integrity Operator, then click Install . Keep the default selection of Installation mode and namespace to ensure that the Operator will be installed to the openshift-file-integrity namespace. Click Install . Verification To confirm that the installation is successful: Navigate to the Operators Installed Operators page. Check that the Operator is installed in the openshift-file-integrity namespace and its status is Succeeded . If the Operator is not installed successfully: Navigate to the Operators Installed Operators page and inspect the Status column for any errors or failures. Navigate to the Workloads Pods page and check the logs in any pods in the openshift-file-integrity project that are reporting issues. 6.2.2. Installing the File Integrity Operator using the CLI Prerequisites You must have admin privileges. Procedure Create a Namespace object YAML file by running: USD oc create -f <file-name>.yaml Example output apiVersion: v1 kind: Namespace metadata: labels: openshift.io/cluster-monitoring: "true" name: openshift-file-integrity Create the OperatorGroup object YAML file: USD oc create -f <file-name>.yaml Example output apiVersion: operators.coreos.com/v1 kind: OperatorGroup metadata: name: file-integrity-operator namespace: openshift-file-integrity spec: targetNamespaces: - openshift-file-integrity Create the Subscription object YAML file: USD oc create -f <file-name>.yaml Example output apiVersion: operators.coreos.com/v1alpha1 kind: Subscription metadata: name: file-integrity-operator namespace: openshift-file-integrity spec: channel: "stable" installPlanApproval: Automatic name: file-integrity-operator source: redhat-operators sourceNamespace: openshift-marketplace Verification Verify the installation succeeded by inspecting the CSV file: USD oc get csv -n openshift-file-integrity Verify that the File Integrity Operator is up and running: USD oc get deploy -n openshift-file-integrity 6.2.3. Additional resources The File Integrity Operator is supported in a restricted network environment. For more information, see Using Operator Lifecycle Manager on restricted networks . 6.3. Updating the File Integrity Operator As a cluster administrator, you can update the File Integrity Operator on your OpenShift Container Platform cluster. 6.3.1. Preparing for an Operator update 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 ). Note You cannot change installed Operators to a channel that is older than the current channel. Red Hat Customer Portal Labs include the following application that helps administrators prepare to update their Operators: Red Hat OpenShift Container Platform Operator Update Information Checker 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. 6.3.2. Changing the update channel for an Operator You can change the update channel for an Operator by using the OpenShift Container Platform web console. Tip If the approval strategy in the subscription is set to Automatic , the update process initiates as soon as a new Operator version is available in the selected channel. If the approval strategy is set to Manual , you must manually approve pending updates. Prerequisites An Operator previously installed using Operator Lifecycle Manager (OLM). Procedure In the Administrator perspective of the web console, navigate to Operators Installed Operators . Click the name of the Operator you want to change the update channel for. Click the Subscription tab. Click the name of the update channel under Channel . Click the newer update channel that you want to change to, then click Save . For subscriptions with an Automatic approval strategy, the update begins automatically. Navigate back to the Operators Installed Operators page to monitor the progress of the update. When complete, the status changes to Succeeded and Up to date . For subscriptions with a Manual approval strategy, you can manually approve the update from the Subscription tab. 6.3.3. Manually approving a pending Operator update 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. Prerequisites An Operator previously installed using Operator Lifecycle Manager (OLM). Procedure In the Administrator perspective of the OpenShift Container Platform web console, navigate to Operators Installed Operators . Operators that have a pending update display a status with Upgrade available . Click the name of the Operator you want to update. Click the Subscription tab. Any update requiring approval are displayed to Upgrade Status . For example, it might display 1 requires approval . Click 1 requires approval , then click Preview Install Plan . Review the resources that are listed as available for update. When satisfied, click Approve . Navigate back to the Operators Installed Operators page to monitor the progress of the update. When complete, the status changes to Succeeded and Up to date . 6.4. Understanding the File Integrity Operator The File Integrity Operator is an OpenShift Container Platform Operator that continually runs file integrity checks on the cluster nodes. It deploys a daemon set that initializes and runs privileged advanced intrusion detection environment (AIDE) containers on each node, providing a status object with a log of files that are modified during the initial run of the daemon set pods. Important Currently, only Red Hat Enterprise Linux CoreOS (RHCOS) nodes are supported. 6.4.1. Creating the FileIntegrity custom resource 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. Procedure Create the following example FileIntegrity CR named worker-fileintegrity.yaml to enable scans on worker nodes: Example FileIntegrity CR apiVersion: fileintegrity.openshift.io/v1alpha1 kind: FileIntegrity metadata: name: worker-fileintegrity namespace: openshift-file-integrity spec: nodeSelector: 1 node-role.kubernetes.io/worker: "" tolerations: 2 - key: "myNode" operator: "Exists" effect: "NoSchedule" config: 3 name: "myconfig" namespace: "openshift-file-integrity" key: "config" gracePeriod: 20 4 maxBackups: 5 5 initialDelay: 60 6 debug: false status: phase: Active 7 1 Defines the selector for scheduling node scans. 2 Specify tolerations to schedule on nodes with custom taints. When not specified, a default toleration allowing running on main and infra nodes is applied. 3 Define a ConfigMap containing an AIDE configuration to use. 4 The number of seconds to pause in between AIDE integrity checks. Frequent AIDE checks on a node might be resource intensive, so it can be useful to specify a longer interval. Default is 900 seconds (15 minutes). 5 The maximum number of AIDE database and log backups (leftover from the re-init process) to keep on a node. Older backups beyond this number are automatically pruned by the daemon. Default is set to 5. 6 The number of seconds to wait before starting the first AIDE integrity check. Default is set to 0. 7 The running status of the FileIntegrity instance. Statuses are Initializing , Pending , or Active . Initializing The FileIntegrity object is currently initializing or re-initializing the AIDE database. Pending The FileIntegrity deployment is still being created. Active The scans are active and ongoing. Apply the YAML file to the openshift-file-integrity namespace: USD oc apply -f worker-fileintegrity.yaml -n openshift-file-integrity Verification Confirm the FileIntegrity object was created successfully by running the following command: USD oc get fileintegrities -n openshift-file-integrity Example output NAME AGE worker-fileintegrity 14s 6.4.2. Checking the FileIntegrity custom resource status The FileIntegrity custom resource (CR) reports its status through the . status.phase subresource. Procedure To query the FileIntegrity CR status, run: USD oc get fileintegrities/worker-fileintegrity -o jsonpath="{ .status.phase }" Example output Active 6.4.3. FileIntegrity custom resource phases Pending - The phase after the custom resource (CR) is created. Active - The phase when the backing daemon set is up and running. Initializing - The phase when the AIDE database is being reinitialized. 6.4.4. Understanding the FileIntegrityNodeStatuses object The scan results of the FileIntegrity CR are reported in another object called FileIntegrityNodeStatuses . USD oc get fileintegritynodestatuses Example output 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 Note It might take some time for the FileIntegrityNodeStatus object results to be available. 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. USD 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. USD oc get fileintegritynodestatuses -w Example output 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 6.4.5. FileIntegrityNodeStatus CR status types These conditions are reported in the results array of the corresponding FileIntegrityNodeStatus CR status: Succeeded - The integrity check passed; the files and directories covered by the AIDE check have not been modified since the database was last initialized. Failed - The integrity check failed; some files or directories covered by the AIDE check have been modified since the database was last initialized. Errored - The AIDE scanner encountered an internal error. 6.4.5.1. FileIntegrityNodeStatus CR success example Example output of a condition with a success 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" } ] In this case, all three scans succeeded and so far there are no other conditions. 6.4.5.2. FileIntegrityNodeStatus CR failure status example To simulate a failure condition, modify one of the files AIDE tracks. For example, modify /etc/resolv.conf on one of the worker nodes: USD oc debug node/ip-10-0-130-192.ec2.internal Example output 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 ... After some time, the Failed condition is reported in the results array of the corresponding FileIntegrityNodeStatus object. The Succeeded condition is retained, which allows you to pinpoint the time the check failed. USD oc get fileintegritynodestatuses.fileintegrity.openshift.io/worker-fileintegrity-ip-10-0-130-192.ec2.internal -ojsonpath='{.results}' | jq -r Alternatively, if you are not mentioning the object name, run: USD oc get fileintegritynodestatuses.fileintegrity.openshift.io -ojsonpath='{.items[*].results}' | jq Example output [ { "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" } ] The Failed condition points to a config map that gives more details about what exactly failed and why: USD oc describe cm aide-ds-worker-fileintegrity-ip-10-0-130-192.ec2.internal-failed Example output 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> Due to the config map data size limit, AIDE logs over 1 MB are added to the failure config map as a base64-encoded gzip archive. In this case, you want to pipe the output of the above command to base64 --decode | gunzip . Compressed logs are indicated by the presence of a file-integrity.openshift.io/compressed annotation key in the config map. 6.4.6. Understanding events 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. USD oc get events --field-selector reason=FileIntegrityStatus Example output 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. USD oc get events --field-selector reason=NodeIntegrityStatus Example output 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. USD oc get events --field-selector reason=NodeIntegrityStatus Example output 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 6.5. Configuring the Custom File Integrity Operator 6.5.1. Viewing FileIntegrity object attributes As with any Kubernetes custom resources (CRs), you can run oc explain fileintegrity , and then look at the individual attributes using: USD oc explain fileintegrity.spec USD oc explain fileintegrity.spec.config 6.5.2. Important attributes Table 6.1. Important spec and spec.config attributes Attribute Description spec.nodeSelector A map of key-values pairs that must match with node's labels in order for the AIDE pods to be schedulable on that node. The typical use is to set only a single key-value pair where node-role.kubernetes.io/worker: "" schedules AIDE on all worker nodes, node.openshift.io/os_id: "rhcos" schedules on all Red Hat Enterprise Linux CoreOS (RHCOS) nodes. spec.debug A boolean attribute. If set to true , the daemon running in the AIDE deamon set's pods would output extra information. spec.tolerations Specify tolerations to schedule on nodes with custom taints. When not specified, a default toleration is applied, which allows tolerations to run on control plane nodes. spec.config.gracePeriod The number of seconds to pause in between AIDE integrity checks. Frequent AIDE checks on a node can be resource intensive, so it can be useful to specify a longer interval. Defaults to 900 , or 15 minutes. maxBackups The maximum number of AIDE database and log backups leftover from the re-init process to keep on a node. Older backups beyond this number are automatically pruned by the daemon. spec.config.name Name of a configMap that contains custom AIDE configuration. If omitted, a default configuration is created. spec.config.namespace Namespace of a configMap that contains custom AIDE configuration. If unset, the FIO generates a default configuration suitable for RHCOS systems. spec.config.key Key that contains actual AIDE configuration in a config map specified by name and namespace . The default value is aide.conf . spec.config.initialDelay The number of seconds to wait before starting the first AIDE integrity check. Default is set to 0. This attribute is optional. 6.5.3. Examine the default configuration The default File Integrity Operator configuration is stored in a config map with the same name as the FileIntegrity CR. Procedure To examine the default config, run: USD oc describe cm/worker-fileintegrity 6.5.4. Understanding the default File Integrity Operator configuration 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: /root /boot /usr /etc The following directories are not covered: /var /opt Some OpenShift Container Platform-specific excludes under /etc/ 6.5.5. Supplying a custom AIDE configuration 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. Note /hostroot is the directory where the pods running AIDE mount the host's file system. Changing the configuration triggers a reinitializing of the database. 6.5.6. Defining a custom File Integrity Operator configuration 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. Procedure Make a copy of the default configuration. Edit the default configuration with the files that must be watched or excluded. Store the edited contents in a new config map. Point the FileIntegrity object to the new config map through the attributes in spec.config . Extract the default configuration: USD oc extract cm/worker-fileintegrity --keys=aide.conf This creates a file named aide.conf that you can edit. To illustrate how the Operator post-processes the paths, this example adds an exclude directory without the prefix: USD vim aide.conf Example output /hostroot/etc/kubernetes/static-pod-resources !/hostroot/etc/kubernetes/aide.* !/hostroot/etc/kubernetes/manifests !/hostroot/etc/docker/certs.d !/hostroot/etc/selinux/targeted !/hostroot/etc/openvswitch/conf.db Exclude a path specific to control plane nodes: !/opt/mydaemon/ Store the other content in /etc : /hostroot/etc/ CONTENT_EX Create a config map based on this file: USD oc create cm master-aide-conf --from-file=aide.conf Define a FileIntegrity CR manifest that references the config map: apiVersion: fileintegrity.openshift.io/v1alpha1 kind: FileIntegrity metadata: name: master-fileintegrity namespace: openshift-file-integrity spec: nodeSelector: node-role.kubernetes.io/master: "" config: name: master-aide-conf namespace: openshift-file-integrity The Operator processes the provided config map file and stores the result in a config map with the same name as the FileIntegrity object: USD oc describe cm/master-fileintegrity | grep /opt/mydaemon Example output !/hostroot/opt/mydaemon 6.5.7. Changing the custom File Integrity configuration 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. 6.6. Performing advanced Custom File Integrity Operator tasks 6.6.1. Reinitializing the database If the File Integrity Operator detects a change that was planned, it might be required to reinitialize the database. Procedure Annotate the FileIntegrity custom resource (CR) with file-integrity.openshift.io/re-init : USD oc annotate fileintegrities/worker-fileintegrity file-integrity.openshift.io/re-init= The old database and log files are backed up and a new database is initialized. The old database and logs are retained on the nodes under /etc/kubernetes , as seen in the following output from a pod spawned using oc debug : Example output ls -lR /host/etc/kubernetes/aide.* -rw-------. 1 root root 1839782 Sep 17 15:08 /host/etc/kubernetes/aide.db.gz -rw-------. 1 root root 1839783 Sep 17 14:30 /host/etc/kubernetes/aide.db.gz.backup-20200917T15_07_38 -rw-------. 1 root root 73728 Sep 17 15:07 /host/etc/kubernetes/aide.db.gz.backup-20200917T15_07_55 -rw-r--r--. 1 root root 0 Sep 17 15:08 /host/etc/kubernetes/aide.log -rw-------. 1 root root 613 Sep 17 15:07 /host/etc/kubernetes/aide.log.backup-20200917T15_07_38 -rw-r--r--. 1 root root 0 Sep 17 15:07 /host/etc/kubernetes/aide.log.backup-20200917T15_07_55 To provide some permanence of record, the resulting config maps are not owned by the FileIntegrity object, so manual cleanup is necessary. As a result, any integrity failures would still be visible in the FileIntegrityNodeStatus object. 6.6.2. Machine config integration 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. 6.6.3. Exploring the daemon sets 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: USD oc -n openshift-file-integrity get ds/aide-worker-fileintegrity To list the pods in that daemon set, run: USD 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. USD oc -n openshift-file-integrity logs pod/aide-worker-fileintegrity-mr8x6 Example output 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. 6.7. Troubleshooting the File Integrity Operator 6.7.1. General troubleshooting Issue You want to generally troubleshoot issues with the File Integrity Operator. Resolution Enable the debug flag in the FileIntegrity object. The debug flag increases the verbosity of the daemons that run in the DaemonSet pods and run the AIDE checks. 6.7.2. Checking the AIDE configuration Issue You want to check the AIDE configuration. Resolution The AIDE configuration is stored in a config map with the same name as the FileIntegrity object. All AIDE configuration config maps are labeled with file-integrity.openshift.io/aide-conf . 6.7.3. Determining the FileIntegrity object's phase Issue You want to determine if the FileIntegrity object exists and see its current status. Resolution To see the FileIntegrity object's current status, run: USD oc get fileintegrities/worker-fileintegrity -o jsonpath="{ .status }" Once the FileIntegrity object and the backing daemon set are created, the status should switch to Active . If it does not, check the Operator pod logs. 6.7.4. Determining that the daemon set's pods are running on the expected nodes Issue You want to confirm that the daemon set exists and that its pods are running on the nodes you expect them to run on. Resolution Run: USD oc -n openshift-file-integrity get pods -lapp=aide-worker-fileintegrity Note Adding -owide includes the IP address of the node that the pod is running on. To check the logs of the daemon pods, run oc logs . Check the return value of the AIDE command to see if the check passed or failed.

Commands:
oc create -f <file-name>.yaml
apiVersion: v1 kind: Namespace metadata: labels: openshift.io/cluster-monitoring: "true" name: openshift-file-integrity
oc create -f <file-name>.yaml
apiVersion: operators.coreos.com/v1 kind: OperatorGroup metadata: name: file-integrity-operator namespace: openshift-file-integrity spec: targetNamespaces: - openshift-file-integrity
oc create -f <file-name>.yaml
apiVersion: operators.coreos.com/v1alpha1 kind: Subscription metadata: name: file-integrity-operator namespace: openshift-file-integrity spec: channel: "stable" installPlanApproval: Automatic name: file-integrity-operator source: redhat-operators sourceNamespace: openshift-marketplace
oc get csv -n openshift-file-integrity
oc get deploy -n openshift-file-integrity
apiVersion: fileintegrity.openshift.io/v1alpha1 kind: FileIntegrity metadata: name: worker-fileintegrity namespace: openshift-file-integrity spec: nodeSelector: 1 node-role.kubernetes.io/worker: "" tolerations: 2 - key: "myNode" operator: "Exists" effect: "NoSchedule" config: 3 name: "myconfig" namespace: "openshift-file-integrity" key: "config" gracePeriod: 20 4 maxBackups: 5 5 initialDelay: 60 6 debug: false status: phase: Active 7
oc apply -f worker-fileintegrity.yaml -n openshift-file-integrity
oc get fileintegrities -n openshift-file-integrity
NAME AGE worker-fileintegrity 14s
oc get fileintegrities/worker-fileintegrity -o jsonpath="{ .status.phase }"
Active
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
oc get fileintegritynodestatuses.fileintegrity.openshift.io -ojsonpath='{.items[*].results}' | jq
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
[ { "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>
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
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
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
oc explain fileintegrity.spec
oc explain fileintegrity.spec.config
oc describe cm/worker-fileintegrity
@@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
oc extract cm/worker-fileintegrity --keys=aide.conf
vim aide.conf
/hostroot/etc/kubernetes/static-pod-resources !/hostroot/etc/kubernetes/aide.* !/hostroot/etc/kubernetes/manifests !/hostroot/etc/docker/certs.d !/hostroot/etc/selinux/targeted !/hostroot/etc/openvswitch/conf.db
!/opt/mydaemon/
/hostroot/etc/ CONTENT_EX
oc create cm master-aide-conf --from-file=aide.conf
apiVersion: fileintegrity.openshift.io/v1alpha1 kind: FileIntegrity metadata: name: master-fileintegrity namespace: openshift-file-integrity spec: nodeSelector: node-role.kubernetes.io/master: "" config: name: master-aide-conf namespace: openshift-file-integrity
oc describe cm/master-fileintegrity | grep /opt/mydaemon
!/hostroot/opt/mydaemon
oc annotate fileintegrities/worker-fileintegrity file-integrity.openshift.io/re-init=
ls -lR /host/etc/kubernetes/aide.* -rw-------. 1 root root 1839782 Sep 17 15:08 /host/etc/kubernetes/aide.db.gz -rw-------. 1 root root 1839783 Sep 17 14:30 /host/etc/kubernetes/aide.db.gz.backup-20200917T15_07_38 -rw-------. 1 root root 73728 Sep 17 15:07 /host/etc/kubernetes/aide.db.gz.backup-20200917T15_07_55 -rw-r--r--. 1 root root 0 Sep 17 15:08 /host/etc/kubernetes/aide.log -rw-------. 1 root root 613 Sep 17 15:07 /host/etc/kubernetes/aide.log.backup-20200917T15_07_38 -rw-r--r--. 1 root root 0 Sep 17 15:07 /host/etc/kubernetes/aide.log.backup-20200917T15_07_55
oc -n openshift-file-integrity get ds/aide-worker-fileintegrity
oc -n openshift-file-integrity get pods -lapp=aide-worker-fileintegrity
oc -n openshift-file-integrity logs pod/aide-worker-fileintegrity-mr8x6
Starting the AIDE runner daemon initializing AIDE db initialization finished running aide check
oc get fileintegrities/worker-fileintegrity -o jsonpath="{ .status }"
oc -n openshift-file-integrity get pods -lapp=aide-worker-fileintegrity