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12.6. Security context constraints reference commands

You can manage SCCs in your instance as normal API objects using the CLI.

注意

You must have cluster-admin privileges to manage SCCs.

重要

Do not modify the default SCCs. Customizing the default SCCs can lead to issues when upgrading. Instead, create new SCCs.

12.6.1. Listing SCCs
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To get a current list of SCCs: 

$ oc get scc

Example output

NAME               PRIV    CAPS   SELINUX     RUNASUSER          FSGROUP     SUPGROUP    PRIORITY   READONLYROOTFS   VOLUMES
anyuid             false   []     MustRunAs   RunAsAny           RunAsAny    RunAsAny    10         false            [configMap downwardAPI emptyDir persistentVolumeClaim projected secret]
hostaccess         false   []     MustRunAs   MustRunAsRange     MustRunAs   RunAsAny    <none>     false            [configMap downwardAPI emptyDir hostPath persistentVolumeClaim projected secret]
hostmount-anyuid   false   []     MustRunAs   RunAsAny           RunAsAny    RunAsAny    <none>     false            [configMap downwardAPI emptyDir hostPath nfs persistentVolumeClaim projected secret]
hostnetwork        false   []     MustRunAs   MustRunAsRange     MustRunAs   MustRunAs   <none>     false            [configMap downwardAPI emptyDir persistentVolumeClaim projected secret]
node-exporter      false   []     RunAsAny    RunAsAny           RunAsAny    RunAsAny    <none>     false            [*]
nonroot            false   []     MustRunAs   MustRunAsNonRoot   RunAsAny    RunAsAny    <none>     false            [configMap downwardAPI emptyDir persistentVolumeClaim projected secret]
privileged         true    [*]    RunAsAny    RunAsAny           RunAsAny    RunAsAny    <none>     false            [*]
restricted         false   []     MustRunAs   MustRunAsRange     MustRunAs   RunAsAny    <none>     false            [configMap downwardAPI emptyDir persistentVolumeClaim projected secret]

12.6.2. Examining an SCC
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You can view information about a particular SCC, including which users, service accounts, and groups the SCC is applied to.

For example, to examine the restricted SCC: 

$ oc describe scc restricted

Example output

Name:					restricted
Priority:				<none>
Access:
  Users:				<none>
1 

  Groups:				system:authenticated
2 

Settings:
  Allow Privileged:			false
  Default Add Capabilities:		<none>
  Required Drop Capabilities:		KILL,MKNOD,SYS_CHROOT,SETUID,SETGID
  Allowed Capabilities:			<none>
  Allowed Seccomp Profiles:		<none>
  Allowed Volume Types:			configMap,downwardAPI,emptyDir,persistentVolumeClaim,projected,secret
  Allow Host Network:			false
  Allow Host Ports:			false
  Allow Host PID:			false
  Allow Host IPC:			false
  Read Only Root Filesystem:		false
  Run As User Strategy: MustRunAsRange
    UID:				<none>
    UID Range Min:			<none>
    UID Range Max:			<none>
  SELinux Context Strategy: MustRunAs
    User:				<none>
    Role:				<none>
    Type:				<none>
    Level:				<none>
  FSGroup Strategy: MustRunAs
    Ranges:				<none>
  Supplemental Groups Strategy: RunAsAny
    Ranges:				<none>

1
Lists which users and service accounts the SCC is applied to.
2
Lists which groups the SCC is applied to.
注意

To preserve customized SCCs during upgrades, do not edit settings on the default SCCs.

12.6.3. Deleting an SCC
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To delete an SCC: 

$ oc delete scc <scc_name>
注意

If you delete a default SCC, it will regenerate when you restart the cluster.

12.6.4. Updating an SCC
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To update an existing SCC: 

$ oc edit scc <scc_name>
注意

To preserve customized SCCs during upgrades, do not edit settings on the default SCCs.

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