红帽全球峰会15.6. 安全性上下文约束命令参考
您可以使用 OpenShift CLI (oc) 将实例中的安全性上下文约束 (SCC) 作为常规 API 对象进行管理。
注意
您必须具有 cluster-admin 特权才能管理 SCC。
15.6.1. 列出安全性上下文约束
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获取当前的 SCC 列表：
$ oc get scc输出示例
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]15.6.2. 检查安全性上下文约束
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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输出示例
Name: restricted
Priority: <none>
Access:
Users: <none>
Groups: system:authenticated
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>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。
15.6.3. 删除安全性上下文约束
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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。
15.6.4. 更新安全性上下文约束
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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。
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