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Add
features.md to formalize the runc features JSON
Add `features.md` and `features-linux.md`, to formalize the `runc features` JSON that was introduced in runc v1.1.0-rc.1 . A runtime caller MAY use this JSON to detect the features implemented by the runtime. The spec corresponds to https://github.com/opencontainers/runc/blob/v1.1.0-rc.1/types/features/features.go (opencontainers/runc PR 3296, opencontainers/runc PR 3310) Differences from runc v1.1.0-rc.1: - Add `.linux.intelRdt.enabled` field - Add `.linux.cgroup.rdma` field Signed-off-by: Akihiro Suda <[email protected]>
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| # <a name="linuxFeatures" />Linux Features Document | ||
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| This document describes the [Linux-specific section](features.md#platform-specific-features) of the [features document](features.md). | ||
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| ## <a name="linuxFeaturesNamespaces" />Namespaces | ||
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| * **`namespaces`** (array of strings, OPTIONAL) The recognized names of the namespaces, including namespaces that might not be supported by the host operating system. | ||
| The runtime MUST recognize the elements in this array as the [`type` of `linux.namespaces` objects in `config.json`](config-linux.md#namespaces). | ||
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| ### Example | ||
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| ```json | ||
| "namespaces": [ | ||
| "cgroup", | ||
| "ipc", | ||
| "mount", | ||
| "network", | ||
| "pid", | ||
| "user", | ||
| "uts" | ||
| ] | ||
| ``` | ||
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| ## <a name="linuxFeaturesCapabilities" />Capabilities | ||
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| * **`capabilities`** (array of strings, OPTIONAL) The recognized names of the capabilities, including capabilities that might not be supported by the host operating system. | ||
| The runtime MUST recognize the elements in this array in the [`process.capabilities` object of `config.json`](config.md#linux-process). | ||
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| ### Example | ||
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| ```json | ||
| "capabilities": [ | ||
| "CAP_CHOWN", | ||
| "CAP_DAC_OVERRIDE", | ||
| "CAP_DAC_READ_SEARCH", | ||
| "CAP_FOWNER", | ||
| "CAP_FSETID", | ||
| "CAP_KILL", | ||
| "CAP_SETGID", | ||
| "CAP_SETUID", | ||
| "CAP_SETPCAP", | ||
| "CAP_LINUX_IMMUTABLE", | ||
| "CAP_NET_BIND_SERVICE", | ||
| "CAP_NET_BROADCAST", | ||
| "CAP_NET_ADMIN", | ||
| "CAP_NET_RAW", | ||
| "CAP_IPC_LOCK", | ||
| "CAP_IPC_OWNER", | ||
| "CAP_SYS_MODULE", | ||
| "CAP_SYS_RAWIO", | ||
| "CAP_SYS_CHROOT", | ||
| "CAP_SYS_PTRACE", | ||
| "CAP_SYS_PACCT", | ||
| "CAP_SYS_ADMIN", | ||
| "CAP_SYS_BOOT", | ||
| "CAP_SYS_NICE", | ||
| "CAP_SYS_RESOURCE", | ||
| "CAP_SYS_TIME", | ||
| "CAP_SYS_TTY_CONFIG", | ||
| "CAP_MKNOD", | ||
| "CAP_LEASE", | ||
| "CAP_AUDIT_WRITE", | ||
| "CAP_AUDIT_CONTROL", | ||
| "CAP_SETFCAP", | ||
| "CAP_MAC_OVERRIDE", | ||
| "CAP_MAC_ADMIN", | ||
| "CAP_SYSLOG", | ||
| "CAP_WAKE_ALARM", | ||
| "CAP_BLOCK_SUSPEND", | ||
| "CAP_AUDIT_READ", | ||
| "CAP_PERFMON", | ||
| "CAP_BPF", | ||
| "CAP_CHECKPOINT_RESTORE" | ||
| ] | ||
| ``` | ||
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| ## <a name="linuxFeaturesCgroup" />Cgroup | ||
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| **`cgroup`** (object, OPTIONAL) represents the runtime's implementation status of cgroup managers. | ||
| Irrelevant to the cgroup version of the host operating system. | ||
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| * **`v1`** (bool, OPTIONAL) represents whether the runtime supports cgroup v1. | ||
| * **`v2`** (bool, OPTIONAL) represents whether the runtime supports cgroup v2. | ||
| * **`systemd`** (bool, OPTIONAL) represents whether the runtime supports system-wide systemd cgroup manager. | ||
| * **`systemdUser`** (bool, OPTIONAL) represents whether the runtime supports user-scoped systemd cgroup manager. | ||
| * **`rdma`** (bool, OPTIONAL) represents whether the runtime supports RDMA cgroup controller. | ||
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| ### Example | ||
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| ```json | ||
| "cgroup": { | ||
| "v1": true, | ||
| "v2": true, | ||
| "systemd": true, | ||
| "systemdUser": true, | ||
| "rdma": false | ||
| } | ||
| ``` | ||
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| ## <a name="linuxFeaturesSeccomp" />Seccomp | ||
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| **`seccomp`** (object, OPTIONAL) represents the runtime's implementation status of seccomp. | ||
| Irrelevant to the kernel version of the host operating system. | ||
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| * **`enabled`** (bool, OPTIONAL) represents whether the runtime supports seccomp. | ||
| * **`actions`** (array of strings, OPTIONAL) The recognized names of the seccomp actions. | ||
| The runtime MUST recognize the elements in this array in the [`syscalls[].action` property of the `linux.seccomp` object in `config.json`](config-linux.md#seccomp). | ||
| * **`operators`** (array of strings, OPTIONAL) The recognized names of the seccomp operators. | ||
| The runtime MUST recognize the elements in this array in the [`syscalls[].args[].op` property of the `linux.seccomp` object in `config.json`](config-linux.md#seccomp). | ||
| * **`archs`** (array of strings, OPTIONAL) The recognized names of the seccomp architectures. | ||
| The runtime MUST recognize the elements in this array in the [`architectures` property of the `linux.seccomp` object in `config.json`](config-linux.md#seccomp). | ||
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| ### Example | ||
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| ```json | ||
| "seccomp": { | ||
| "enabled": true, | ||
| "actions": [ | ||
| "SCMP_ACT_ALLOW", | ||
| "SCMP_ACT_ERRNO", | ||
| "SCMP_ACT_KILL", | ||
| "SCMP_ACT_LOG", | ||
| "SCMP_ACT_NOTIFY", | ||
| "SCMP_ACT_TRACE", | ||
| "SCMP_ACT_TRAP" | ||
| ], | ||
| "operators": [ | ||
| "SCMP_CMP_EQ", | ||
| "SCMP_CMP_GE", | ||
| "SCMP_CMP_GT", | ||
| "SCMP_CMP_LE", | ||
| "SCMP_CMP_LT", | ||
| "SCMP_CMP_MASKED_EQ", | ||
| "SCMP_CMP_NE" | ||
| ], | ||
| "archs": [ | ||
| "SCMP_ARCH_AARCH64", | ||
| "SCMP_ARCH_ARM", | ||
| "SCMP_ARCH_MIPS", | ||
| "SCMP_ARCH_MIPS64", | ||
| "SCMP_ARCH_MIPS64N32", | ||
| "SCMP_ARCH_MIPSEL", | ||
| "SCMP_ARCH_MIPSEL64", | ||
| "SCMP_ARCH_MIPSEL64N32", | ||
| "SCMP_ARCH_PPC", | ||
| "SCMP_ARCH_PPC64", | ||
| "SCMP_ARCH_PPC64LE", | ||
| "SCMP_ARCH_S390", | ||
| "SCMP_ARCH_S390X", | ||
| "SCMP_ARCH_X32", | ||
| "SCMP_ARCH_X86", | ||
| "SCMP_ARCH_X86_64" | ||
| ] | ||
| } | ||
| ``` | ||
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| ## <a name="linuxFeaturesApparmor" />AppArmor | ||
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| **`apparmor`** (object, OPTIONAL) represents the runtime's implementation status of AppArmor. | ||
| Irrelevant to the availability of AppArmor on the host operating system. | ||
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| * **`enabled`** (bool, OPTIONAL) represents whether the runtime supports AppArmor. | ||
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| ### Example | ||
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| ```json | ||
| "apparmor": { | ||
| "enabled": true | ||
| } | ||
| ``` | ||
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| ## <a name="linuxFeaturesApparmor" />SELinux | ||
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| **`selinux`** (object, OPTIONAL) represents the runtime's implementation status of SELinux. | ||
| Irrelevant to the availability of SELinux on the host operating system. | ||
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| * **`enabled`** (bool, OPTIONAL) represents whether the runtime supports SELinux. | ||
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| ### Example | ||
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| ```json | ||
| "selinux": { | ||
| "enabled": true | ||
| } | ||
| ``` | ||
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| ## <a name="linuxFeaturesIntelRdt" />Intel RDT | ||
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| **`intelRdt`** (object, OPTIONAL) represents the runtime's implementation status of Intel RDT. | ||
| Irrelevant to the availability of Intel RDT on the host operating system. | ||
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| * **`enabled`** (bool, OPTIONAL) represents whether the runtime supports Intel RDT. | ||
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| ### Example | ||
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| ```json | ||
| "intelRdt": { | ||
| "enabled": true | ||
| } | ||
| ``` |
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