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@@ -1138,11 +1138,30 @@ This can be overridden using a third `:rwm` set of options to each `--device` fl
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In addition to `--privileged`, the operator can have fine grain control over the
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capabilities using `--cap-add` and `--cap-drop`. By default, Docker has a default
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-list of capabilities that are kept. The following table lists the Linux capability options which can be added or dropped.
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+list of capabilities that are kept. The following table lists the Linux capability
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+options which are allowed by default and can be dropped.
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| Capability Key | Capability Description |
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| ---------------- | ----------------------------------------------------------------------------------------------------------------------------- |
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| SETPCAP | Modify process capabilities. |
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+| MKNOD | Create special files using mknod(2). |
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+| AUDIT_WRITE | Write records to kernel auditing log. |
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+| CHOWN | Make arbitrary changes to file UIDs and GIDs (see chown(2)). |
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+| NET_RAW | Use RAW and PACKET sockets. |
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+| DAC_OVERRIDE | Bypass file read, write, and execute permission checks. |
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+| FOWNER | Bypass permission checks on operations that normally require the file system UID of the process to match the UID of the file. |
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+| FSETID | Don't clear set-user-ID and set-group-ID permission bits when a file is modified. |
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+| KILL | Bypass permission checks for sending signals. |
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+| SETGID | Make arbitrary manipulations of process GIDs and supplementary GID list. |
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+| SETUID | Make arbitrary manipulations of process UIDs. |
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+| NET_BIND_SERVICE | Bind a socket to internet domain privileged ports (port numbers less than 1024). |
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+| SYS_CHROOT | Use chroot(2), change root directory. |
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+| SETFCAP | Set file capabilities. |
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+
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+The next table shows the capabilities which are not granted by default and may be added.
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+
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+| Capability Key | Capability Description |
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+| ---------------- | ----------------------------------------------------------------------------------------------------------------------------- |
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| SYS_MODULE | Load and unload kernel modules. |
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| SYS_RAWIO | Perform I/O port operations (iopl(2) and ioperm(2)). |
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| SYS_PACCT | Use acct(2), switch process accounting on or off. |
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@@ -1151,36 +1170,23 @@ list of capabilities that are kept. The following table lists the Linux capabili
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| SYS_RESOURCE | Override resource Limits. |
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| SYS_TIME | Set system clock (settimeofday(2), stime(2), adjtimex(2)); set real-time (hardware) clock. |
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| SYS_TTY_CONFIG | Use vhangup(2); employ various privileged ioctl(2) operations on virtual terminals. |
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-| MKNOD | Create special files using mknod(2). |
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-| AUDIT_WRITE | Write records to kernel auditing log. |
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| AUDIT_CONTROL | Enable and disable kernel auditing; change auditing filter rules; retrieve auditing status and filtering rules. |
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| MAC_OVERRIDE | Allow MAC configuration or state changes. Implemented for the Smack LSM. |
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| MAC_ADMIN | Override Mandatory Access Control (MAC). Implemented for the Smack Linux Security Module (LSM). |
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| NET_ADMIN | Perform various network-related operations. |
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| SYSLOG | Perform privileged syslog(2) operations. |
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-| CHOWN | Make arbitrary changes to file UIDs and GIDs (see chown(2)). |
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-| NET_RAW | Use RAW and PACKET sockets. |
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-| DAC_OVERRIDE | Bypass file read, write, and execute permission checks. |
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-| FOWNER | Bypass permission checks on operations that normally require the file system UID of the process to match the UID of the file. |
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| DAC_READ_SEARCH | Bypass file read permission checks and directory read and execute permission checks. |
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-| FSETID | Don't clear set-user-ID and set-group-ID permission bits when a file is modified. |
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-| KILL | Bypass permission checks for sending signals. |
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-| SETGID | Make arbitrary manipulations of process GIDs and supplementary GID list. |
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-| SETUID | Make arbitrary manipulations of process UIDs. |
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| LINUX_IMMUTABLE | Set the FS_APPEND_FL and FS_IMMUTABLE_FL i-node flags. |
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-| NET_BIND_SERVICE | Bind a socket to internet domain privileged ports (port numbers less than 1024). |
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| NET_BROADCAST | Make socket broadcasts, and listen to multicasts. |
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| IPC_LOCK | Lock memory (mlock(2), mlockall(2), mmap(2), shmctl(2)). |
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| IPC_OWNER | Bypass permission checks for operations on System V IPC objects. |
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-| SYS_CHROOT | Use chroot(2), change root directory. |
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| SYS_PTRACE | Trace arbitrary processes using ptrace(2). |
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| SYS_BOOT | Use reboot(2) and kexec_load(2), reboot and load a new kernel for later execution. |
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| LEASE | Establish leases on arbitrary files (see fcntl(2)). |
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-| SETFCAP | Set file capabilities. |
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| WAKE_ALARM | Trigger something that will wake up the system. |
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-| BLOCK_SUSPEND | Employ features that can block system suspend.
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+| BLOCK_SUSPEND | Employ features that can block system suspend. |
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-Further reference information is available on the [capabilities(7) - Linux man page](http://linux.die.net/man/7/capabilities)
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+Further reference information is available on the [capabilities(7) - Linux man page](http://man7.org/linux/man-pages/man7/capabilities.7.html)
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Both flags support the value `ALL`, so if the
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operator wants to have all capabilities but `MKNOD` they could use:
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Justin Cormack