16.6. 安全性上下文约束参考命令

您可以使用 CLI,将实例中的 SCC 作为常规 API 对象来管理。

注意

您必须具有 cluster-admin 特权才能管理 SCC。

重要

不要修改默认 SCC。自定义默认 SCC 会导致升级时出现问题。如果默认 SCC 不能满足要求,请创建新的 SCC。

16.6.1. 列出 SCC

获取当前的 SCC 列表:

$ oc get scc

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]

16.6.2. 检查 SCC

您可以查看特定 SCC 的信息,包括这个 SCC 应用到哪些用户、服务帐户和组。

例如,检查 restricted SCC:

$ oc describe scc restricted
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
列出 SCC 应用到的用户和服务帐户。
2
列出 SCC 应用到的组。
注意

要在升级过程中保留自定义 SCC,请不要编辑默认 SCC 的设置。

16.6.3. 删除 SCC

删除 SCC:

$ oc delete scc <scc_name>
注意

如果删除了某一默认 SCC,重启集群时会重新生成该 SCC。

16.6.4. 更新 SCC

更新现有的 SCC:

$ oc edit scc <scc_name>
注意

要在升级过程中保留自定义 SCC,请不要编辑默认 SCC 的设置。