Before starting to use the operator, it's worth checking the descriptions of
the different custom resources it introduces. These definitions are in the
following
document.
The primary interface for the compliance-operator is the ComplianceSuite
object, representing a set of scans. The ComplianceSuite can be defined
either manually or with the help of ScanSetting and ScanSettingBinding
objects. Note that while it is possible to use the lower-level ComplianceScan
directly as well, it is not recommended.
As part of this guide, it's assumed that you have installed the compliance operator
in the openshift-compliance namespace. You can find more information about
installation methods and directions in the Installation
Guide.
After you've installed the operator, set the NAMESPACE environment to the
namespace you installed the operator. By default, the operator is installed in
the openshift-compliance namespace.
export NAMESPACE=openshift-compliance
There are several profiles that come out-of-the-box as part of the operator installation.
To view them, use the following command:
$ oc get -n $NAMESPACE profiles.compliance
NAME AGE
ocp4-cis 2m50s
ocp4-cis-node 2m50s
ocp4-e8 2m50s
ocp4-moderate 2m50s
rhcos4-e8 2m46s
rhcos4-moderate 2m46s
These profiles define different compliance benchmarks and as well as
the scans fall into two basic categories - platform and node. The
platform scans are targeting the cluster itself, in the listing above
they're the ocp4-* scans, while the purpose of the node scans is to
scan the actual cluster nodes. All the rhcos4-* profiles above can be
used to create node scans.
Before taking one into use, we'll need to configure how the scans
will run. We can do this with the ScanSetttings custom resource. The
compliance-operator already ships with a default ScanSettings object
that you can take into use immediately:
$ oc get -n $NAMESPACE scansettings default -o yaml
apiVersion: compliance.openshift.io/v1alpha1
kind: ScanSetting
metadata:
name: default
namespace: openshift-compliance
rawResultStorage:
rotation: 3
size: 1Gi
roles:
- worker
- master
scanTolerations:
- effect: NoSchedule
key: node-role.kubernetes.io/master
operator: Exists
schedule: '0 1 * * *'
So, to assert the intent of complying with the rhcos4-moderate profile, we can use
the ScanSettingBinding custom resource. The example that already exists in this repo
will do just this.
$ cat deploy/crds/compliance.openshift.io_v1alpha1_scansettingbinding_cr.yaml
apiVersion: compliance.openshift.io/v1alpha1
kind: ScanSettingBinding
metadata:
name: nist-moderate
profiles:
- name: ocp4-moderate
kind: Profile
apiGroup: compliance.openshift.io/v1alpha1
settingsRef:
name: default
kind: ScanSetting
apiGroup: compliance.openshift.io/v1alpha1
To take it into use, do the following:
$ oc create -n $NAMESPACE -f deploy/crds/compliance.openshift.io_v1alpha1_scansettingbinding_cr.yaml
scansettingbinding.compliance.openshift.io/nist-moderate created
At this point the operator reconciles a ComplianceSuite custom resource,
we can use this to track the progress of our scan.
$ oc get -n $NAMESPACE compliancesuites -w
NAME PHASE RESULT
nist-moderate RUNNING NOT-AVAILABLE
You can also make use of conditions to wait for a suite to produce results:
$ oc wait --for=condition=ready compliancesuite cis-compliancesuite
This subsequently creates the ComplianceScan objects for the suite.
The ComplianceScan then creates scan pods that run on each node in
the cluster. The scan pods execute openscap-chroot on every node and
eventually report the results. The scan takes several minutes to complete.
If you're interested in seeing the individual pods, you can do so with:
$ oc get -n $NAMESPACE pods -w
When the scan is done, the operator changes the state of the ComplianceSuite
object to "Done" and all the pods are transition to the "Completed"
state. You can then check the ComplianceRemediations that were found with:
$ oc get -n $NAMESPACE complianceremediations
NAME STATE
workers-scan-auditd-name-format NotApplied
workers-scan-coredump-disable-backtraces NotApplied
workers-scan-coredump-disable-storage NotApplied
workers-scan-disable-ctrlaltdel-burstaction NotApplied
workers-scan-disable-users-coredumps NotApplied
workers-scan-grub2-audit-argument NotApplied
workers-scan-grub2-audit-backlog-limit-argument NotApplied
workers-scan-grub2-page-poison-argument NotApplied
To apply a remediation, edit that object and set its Apply attribute
to true:
$ oc edit -n $NAMESPACE complianceremediation/workers-scan-no-direct-root-logins
The operator then creates a MachineConfig object per remediation. This
MachineConfig object is rendered to a MachinePool and the
MachineConfigDeamon running on nodes in that pool pushes the configuration
to the nodes and reboots the nodes.
You can watch the node status with:
$ oc get nodes -w
Once the nodes reboot, you might want to run another Suite to ensure that the remediation that you applied previously was no longer found.
The scans provide two kinds of raw results: the full report in the ARF format and just the list of scan results in the XCCDF format. The ARF reports are, due to their large size, copied into persistent volumes:
$ oc get pv
NAME CAPACITY CLAIM
pvc-5d49c852-03a6-4bcd-838b-c7225307c4bb 1Gi openshift-compliance/workers-scan
pvc-ef68c834-bb6e-4644-926a-8b7a4a180999 1Gi openshift-compliance/masters-scan
$ oc get pvc
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
ocp4-moderate Bound pvc-01b7bd30-0d19-4fbc-8989-bad61d9384d9 1Gi RWO gp2 37m
rhcos4-with-usb-master Bound pvc-f3f35712-6c3f-42f0-a89a-af9e6f54a0d4 1Gi RWO gp2 37m
rhcos4-with-usb-worker Bound pvc-7837e9ba-db13-40c4-8eee-a2d1beb0ada7 1Gi RWO gp2 37m
An example of extracting ARF results from a scan called workers-scan follows:
Once the scan had finished, you'll note that there is a PersistentVolumeClaim named
after the scan:
oc get pvc/workers-scan
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
workers-scan Bound pvc-01b7bd30-0d19-4fbc-8989-bad61d9384d9 1Gi RWO gp2 38m
You'll want to start a pod that mounts the PV, for example:
apiVersion: "v1"
kind: Pod
metadata:
name: pv-extract
spec:
containers:
- name: pv-extract-pod
image: registry.access.redhat.com/ubi8/ubi
command: ["sleep", "3000"]
volumeMounts:
- mountPath: "/workers-scan-results"
name: workers-scan-vol
volumes:
- name: workers-scan-vol
persistentVolumeClaim:
claimName: workers-scanYou can inspect the files by listing the /workers-scan-results directory and copy the
files locally:
$ oc exec pods/pv-extract -- ls /workers-scan-results/0
lost+found
workers-scan-ip-10-0-129-252.ec2.internal-pod.xml.bzip2
workers-scan-ip-10-0-149-70.ec2.internal-pod.xml.bzip2
workers-scan-ip-10-0-172-30.ec2.internal-pod.xml.bzip2
$ oc cp pv-extract:/workers-scan-results .
The files are bzipped. To get the raw ARF file:
$ bunzip2 -c workers-scan-ip-10-0-129-252.ec2.internal-pod.xml.bzip2 > workers-scan-ip-10-0-129-252.ec2.internal-pod.xml
The XCCDF results are much smaller and can be stored in a configmap, from which you can extract the results. For easier filtering, the configmaps are labeled with the scan name:
$ oc get cm -l=compliance.openshift.io/scan-name=masters-scan
NAME DATA AGE
masters-scan-ip-10-0-129-248.ec2.internal-pod 1 25m
masters-scan-ip-10-0-144-54.ec2.internal-pod 1 24m
masters-scan-ip-10-0-174-253.ec2.internal-pod 1 25m
To extract the results, use:
$ oc extract cm/masters-scan-ip-10-0-174-253.ec2.internal-pod
Note that if the results are too big for the ConfigMap, they'll be bzipped and base64 encoded.
Note that the current testing has been done in RHCOS. In the absence of RHEL/CentOS support, one can simply run OpenSCAP directly on the nodes.
Current testing has been done on OpenShift (OCP). The project is open to getting other platforms tested, so volunteers are needed for this.
The current supported versions of OpenShift are 4.6 and up.
See the self-paced workshop for a hands-on tutorial, including advanced topics such as content building.
An oc adm must-gather image for collecting operator information for debugging
or support is available at quay.io/compliance-operator/must-gather:latest:
$ oc adm must-gather --image=quay.io/compliance-operator/must-gather:latest
The compliance-operator exposes the following metrics to Prometheus when cluster-monitoring is available.
# HELP compliance_operator_compliance_remediation_status_total A counter
# for the total number of updates to the status of a ComplianceRemediation
# TYPE compliance_operator_compliance_remediation_status_total counter
compliance_operator_compliance_remediation_status_total{name="remediation-name",state="NotApplied"} 1
# HELP compliance_operator_compliance_scan_status_total A counter for the
# total number of updates to the status of a ComplianceScan
# TYPE compliance_operator_compliance_scan_status_total counter
compliance_operator_compliance_scan_status_total{name="scan-name",phase="AGGREGATING",result="NOT-AVAILABLE"} 1
# HELP compliance_operator_compliance_scan_error_total A counter for the
# total number of encounters of error
# TYPE compliance_operator_compliance_scan_error_total counter
compliance_operator_compliance_scan_error_total{name="scan-name",error="some_error"} 1
# HELP compliance_operator_compliance_state A gauge for the compliance
# state of a ComplianceSuite. Set to 0 when COMPLIANT, 1 when NON-COMPLIANT,
# 2 when INCONSISTENT, and 3 when ERROR
# TYPE compliance_operator_compliance_state gauge
compliance_operator_compliance_state{name="some-compliance-suite"} 1
After logging into the console, navigating to Monitoring -> Metrics, the
compliance_operator* metrics can be queried using the metrics dashboard. The
{__name__=~"compliance.*"} query can be used to view the full set of metrics.
Testing for the metrics from the cli can also be done directly with a pod that curls the metrics service. This is useful for troubleshooting.
oc run --rm -i --restart=Never --image=registry.fedoraproject.org/fedora-minimal:latest -n openshift-compliance metrics-test -- bash -c 'curl -ks -H "Authorization: Bea
rer $(cat /var/run/secrets/kubernetes.io/serviceaccount/token)" https://metrics.openshift-compliance.svc:8585/metrics-co' | grep compliance