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
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
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> 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>
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
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
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。
