Implement crun features #1237

sohankunkerkar · 2023-06-20T19:23:30Z

Fixes: #1177

src/features.c

giuseppe

thanks for working on this. I've left some comments, also make sure make clang-format passes

src/features.c

src/libcrun/container.c

src/features.c

src/libcrun/container.c

src/features.c

.vscode/settings.json

giuseppe

some more small comments. Also this is a completely new feature, so we need some tests too under tests to run with make check

Makefile.am

src/features.c

src/libcrun/container.c

src/features.c

src/libcrun/container.c

tests/test_oci_features.py

giuseppe · 2023-06-25T07:00:07Z

src/libcrun/container.c

+  "SCMP_CMP_MASKED_EQ",
+};
+
+static const char *archs[] = {


I am still not sure if we must list the arches. Not only we risk to not list all the supported values, but we also risk that the dynamically linked version of libseccomp doesn't have support for what we are listing here.

What do you think? Wouldn't it be safer for now to just drop the arches list from the JSON output?

Yup, it makes sense. Does that sound good to you if we keep the reference of it in the code for the future but drop the entry from the final output for now?

I think it is better to remove the code altogether, we can easily add it back if we ever need it in this form

giuseppe · 2023-06-26T07:45:34Z

when I run the new test locally, I get the following error:

Complete features dictionary: {'ociVersionMin': '1.0.0', 'ociVersionMax': '1.1.0-rc.3', 'hooks': ['prestart', 'createRuntime', 'createContainer', 'startContainer', 'poststart', 'poststop'], 'mountOptions': ['rw', 'rrw', 'ro', 'rro', 'rdirsync', 'rdiratime', 'rnodev', 'rnorelatime', 'nodiratime', 'rnodiratime', 'diratime', 'rnoatime', 'rnomand', 'ratime', 'rmand', 'mand', 'idmap', 'noatime', 'nomand', 'dirsync', 'rnosuid', 'atime', 'rnoexec', 'nodev', 'rbind', 'norelatime', 'bind', 'rnostrictatime', 'strictatime', 'rstrictatime', 'rprivate', 'rsuid', 'remount', 'suid', 'nostrictatime', 'rrelatime', 'nosuid', 'noexec', 'rslave', 'dev', 'rdev', 'rsync', 'relatime', 'sync', 'shared', 'rshared', 'unbindable', 'runbindable', 'defaults', 'async', 'rasync', 'private', 'tmpcopyup', 'rexec', 'exec', 'slave'], 'linux': {'namespaces': ['cgroup', 'ipc', 'mount', 'network', 'pid', 'user', 'uts'], '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'], 'cgroup': {'v1': True, 'v2': True, 'systemd': True, 'systemdUser': True}, 'seccomp': {'enabled': True, 'actions': ['SCMP_ACT_ALLOW', 'SCMP_ACT_ERRNO', 'SCMP_ACT_KILL', 'SCMP_ACT_KILL_PROCESS', 'SCMP_ACT_KILL_THREAD', 'SCMP_ACT_LOG', 'SCMP_ACT_NOTIFY', 'SCMP_ACT_TRACE', 'SCMP_ACT_TRAP'], 'operators': ['SCMP_CMP_NE', 'SCMP_CMP_LT', 'SCMP_CMP_LE', 'SCMP_CMP_EQ', 'SCMP_CMP_GE', 'SCMP_CMP_GT', 'SCMP_CMP_MASKED_EQ']}, 'apparmor': {'enabled': True}, 'selinux': {'enabled': True}}, 'annotations': {'io.github.seccomp.libseccomp.version': '2.5.3', 'org.opencontainers.runc.checkpoint.enabled': True, 'run.oci.crun.checkpoint.enabled': True, 'io.github.containers.crun.commit': '9738116147984a9fb6d993394f74217b0e532be8', 'io.github.containers.crun.version': '1.8.5.0.0.0.31-33cb'}}
Mismatch in feature: linux
Expected: {'namespaces': ['cgroup', 'ipc', 'mount', 'network', 'pid', 'user', 'uts'], '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'], 'cgroup': {'v1': True, 'v2': True, 'systemd': True, 'systemdUser': True}, 'seccomp': {'actions': ['SCMP_ACT_ALLOW', 'SCMP_ACT_ERRNO', 'SCMP_ACT_KILL', 'SCMP_ACT_KILL_PROCESS', 'SCMP_ACT_KILL_THREAD', 'SCMP_ACT_LOG', 'SCMP_ACT_NOTIFY', 'SCMP_ACT_TRACE', 'SCMP_ACT_TRAP'], 'operators': ['SCMP_CMP_NE', 'SCMP_CMP_LT', 'SCMP_CMP_LE', 'SCMP_CMP_EQ', 'SCMP_CMP_GE', 'SCMP_CMP_GT', 'SCMP_CMP_MASKED_EQ']}, 'apparmor': {'enabled': True}, 'selinux': {'enabled': True}}
Actual: {'namespaces': ['cgroup', 'ipc', 'mount', 'network', 'pid', 'user', 'uts'], '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'], 'cgroup': {'v1': True, 'v2': True, 'systemd': True, 'systemdUser': True}, 'seccomp': {'enabled': True, 'actions': ['SCMP_ACT_ALLOW', 'SCMP_ACT_ERRNO', 'SCMP_ACT_KILL', 'SCMP_ACT_KILL_PROCESS', 'SCMP_ACT_KILL_THREAD', 'SCMP_ACT_LOG', 'SCMP_ACT_NOTIFY', 'SCMP_ACT_TRACE', 'SCMP_ACT_TRAP'], 'operators': ['SCMP_CMP_NE', 'SCMP_CMP_LT', 'SCMP_CMP_LE', 'SCMP_CMP_EQ', 'SCMP_CMP_GE', 'SCMP_CMP_GT', 'SCMP_CMP_MASKED_EQ']}, 'apparmor': {'enabled': True}, 'selinux': {'enabled': True}}
not ok 1 - crun-features

giuseppe · 2023-06-26T07:49:17Z

we can't hardcode the list of capabilities in the test. We only need to verify some well known capabilities are in the list, e.g. CAP_SYS_ADMIN, CAP_KILL, CAP_NET_BIND_SERVICE

sohankunkerkar · 2023-06-26T12:52:03Z

we can't hardcode the list of capabilities in the test. We only need to verify some well known capabilities are in the list, e.g. CAP_SYS_ADMIN, CAP_KILL, CAP_NET_BIND_SERVICE

I can do this

def get_linux_capabilities():
    capabilities_file = '/proc/self/status'
    capabilities = []

    with open(capabilities_file, 'r') as file:
        lines = file.readlines()

    for line in lines:
        if line.startswith('Cap') and ':' in line:
            cap_name, cap_value = line.split(':', 1)
            cap_name = cap_name.strip()
            cap_value = cap_value.strip()
            if cap_name.startswith('CapBnd:'):
                cap_hex = cap_value.split()
                for cap in cap_hex:
                    cap_int = int(cap, 16)
                    capabilities.append(cap_int)

    return capabilities

when I run the new test locally, I get the following error:

Complete features dictionary: {'ociVersionMin': '1.0.0', 'ociVersionMax': '1.1.0-rc.3', 'hooks': ['prestart', 'createRuntime', 'createContainer', 'startContainer', 'poststart', 'poststop'], 'mountOptions': ['rw', 'rrw', 'ro', 'rro', 'rdirsync', 'rdiratime', 'rnodev', 'rnorelatime', 'nodiratime', 'rnodiratime', 'diratime', 'rnoatime', 'rnomand', 'ratime', 'rmand', 'mand', 'idmap', 'noatime', 'nomand', 'dirsync', 'rnosuid', 'atime', 'rnoexec', 'nodev', 'rbind', 'norelatime', 'bind', 'rnostrictatime', 'strictatime', 'rstrictatime', 'rprivate', 'rsuid', 'remount', 'suid', 'nostrictatime', 'rrelatime', 'nosuid', 'noexec', 'rslave', 'dev', 'rdev', 'rsync', 'relatime', 'sync', 'shared', 'rshared', 'unbindable', 'runbindable', 'defaults', 'async', 'rasync', 'private', 'tmpcopyup', 'rexec', 'exec', 'slave'], 'linux': {'namespaces': ['cgroup', 'ipc', 'mount', 'network', 'pid', 'user', 'uts'], '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'], 'cgroup': {'v1': True, 'v2': True, 'systemd': True, 'systemdUser': True}, 'seccomp': {'enabled': True, 'actions': ['SCMP_ACT_ALLOW', 'SCMP_ACT_ERRNO', 'SCMP_ACT_KILL', 'SCMP_ACT_KILL_PROCESS', 'SCMP_ACT_KILL_THREAD', 'SCMP_ACT_LOG', 'SCMP_ACT_NOTIFY', 'SCMP_ACT_TRACE', 'SCMP_ACT_TRAP'], 'operators': ['SCMP_CMP_NE', 'SCMP_CMP_LT', 'SCMP_CMP_LE', 'SCMP_CMP_EQ', 'SCMP_CMP_GE', 'SCMP_CMP_GT', 'SCMP_CMP_MASKED_EQ']}, 'apparmor': {'enabled': True}, 'selinux': {'enabled': True}}, 'annotations': {'io.github.seccomp.libseccomp.version': '2.5.3', 'org.opencontainers.runc.checkpoint.enabled': True, 'run.oci.crun.checkpoint.enabled': True, 'io.github.containers.crun.commit': '9738116147984a9fb6d993394f74217b0e532be8', 'io.github.containers.crun.version': '1.8.5.0.0.0.31-33cb'}}
Mismatch in feature: linux
Expected: {'namespaces': ['cgroup', 'ipc', 'mount', 'network', 'pid', 'user', 'uts'], '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'], 'cgroup': {'v1': True, 'v2': True, 'systemd': True, 'systemdUser': True}, 'seccomp': {'actions': ['SCMP_ACT_ALLOW', 'SCMP_ACT_ERRNO', 'SCMP_ACT_KILL', 'SCMP_ACT_KILL_PROCESS', 'SCMP_ACT_KILL_THREAD', 'SCMP_ACT_LOG', 'SCMP_ACT_NOTIFY', 'SCMP_ACT_TRACE', 'SCMP_ACT_TRAP'], 'operators': ['SCMP_CMP_NE', 'SCMP_CMP_LT', 'SCMP_CMP_LE', 'SCMP_CMP_EQ', 'SCMP_CMP_GE', 'SCMP_CMP_GT', 'SCMP_CMP_MASKED_EQ']}, 'apparmor': {'enabled': True}, 'selinux': {'enabled': True}}
Actual: {'namespaces': ['cgroup', 'ipc', 'mount', 'network', 'pid', 'user', 'uts'], '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'], 'cgroup': {'v1': True, 'v2': True, 'systemd': True, 'systemdUser': True}, 'seccomp': {'enabled': True, 'actions': ['SCMP_ACT_ALLOW', 'SCMP_ACT_ERRNO', 'SCMP_ACT_KILL', 'SCMP_ACT_KILL_PROCESS', 'SCMP_ACT_KILL_THREAD', 'SCMP_ACT_LOG', 'SCMP_ACT_NOTIFY', 'SCMP_ACT_TRACE', 'SCMP_ACT_TRAP'], 'operators': ['SCMP_CMP_NE', 'SCMP_CMP_LT', 'SCMP_CMP_LE', 'SCMP_CMP_EQ', 'SCMP_CMP_GE', 'SCMP_CMP_GT', 'SCMP_CMP_MASKED_EQ']}, 'apparmor': {'enabled': True}, 'selinux': {'enabled': True}}
not ok 1 - crun-features

I think you will need to enable seccomp locally before running that test.

giuseppe · 2023-06-26T13:12:28Z

def get_linux_capabilities():
capabilities_file = '/proc/self/status'
capabilities = []

with open(capabilities_file, 'r') as file:
    lines = file.readlines()

for line in lines:
    if line.startswith('Cap') and ':' in line:
        cap_name, cap_value = line.split(':', 1)
        cap_name = cap_name.strip()
        cap_value = cap_value.strip()
        if cap_name.startswith('CapBnd:'):
            cap_hex = cap_value.split()
            for cap in cap_hex:
                cap_int = int(cap, 16)
                capabilities.append(cap_int)

return capabilities

we cannot do that. The kernel could have capabilities that libseccomp doesn't know about, so they could still be missing in the crun features json

giuseppe

LGTM

giuseppe · 2023-06-27T07:36:31Z

made some small changes, I'll merge as soon as the CI is green.

@sohankunkerkar something that is not clear to me yet, is how will you use this feature to decide whether wasm is supported or not?

Wouldn't we need to add that information?

AkihiroSuda · 2023-06-27T07:42:11Z

wasm

👍 as a custom annotation (until its JSON property is officially defined in the spec)

giuseppe · 2023-06-27T08:24:35Z

noticed there is something more to fix, I'll push another version

giuseppe · 2023-06-27T08:55:48Z

I've added a patch. Now wasm support is recorded in a custom annotation

giuseppe · 2023-06-27T08:56:07Z

@flouthoc could you please review the last patch?

Fixes: containers#1177 Signed-off-by: Sohan Kunkerkar <sohank2602@gmail.com>

src/libcrun/container.c

flouthoc · 2023-06-27T09:03:25Z

@giuseppe patch for WASM feature flag looks good to me.

flouthoc

LGTM

Signed-off-by: Sohan Kunkerkar <sohank2602@gmail.com>

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

containers/crun#1237 was merged to master and was tagged `crun-1.8.6' on Jun 27, 2023. Signed-off-by: match man <ppucoder@gmail.com>

1177 fix containers/crun#1237 was merged to master and was tagged `crun-1.8.6' on Jun 27, 2023. Signed-off-by: match man <ppucoder@gmail.com>

The work to support features introduced another point of dependency on libcap that previously wasn't guarded by ifdefs Refs: containers#1237 Signed-off-by: Robert Günzler <r@gnzler.io>

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src/*: implement features

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Fixes: containers#1177 Signed-off-by: Sohan Kunkerkar <sohank2602@gmail.com>

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tests: add test for oci_features

935f4fe

Signed-off-by: Sohan Kunkerkar <sohank2602@gmail.com>

features: add wasm annotation

d006733

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

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paravoid mentioned this pull request Aug 1, 2023

Manually added code to otherwise gperf-generated src/libcrun/mount_flags.c #1253

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0xaead added a commit to 0xaead/containerd that referenced this pull request Aug 12, 2023

crun features command is added

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containers/crun#1237 was merged to master and was tagged `crun-1.8.6' on Jun 27, 2023. Signed-off-by: match man <ppucoder@gmail.com>

0xaead mentioned this pull request Aug 12, 2023

crun features command is added 0xaead/containerd#1

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0xaead added a commit to 0xaead/containerd that referenced this pull request Aug 12, 2023

crun features command is added

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containers/crun#1237 was merged to master and was tagged `crun-1.8.6' on Jun 27, 2023. Signed-off-by: match man <ppucoder@gmail.com>

0xaead mentioned this pull request Aug 12, 2023

crun features command is added containerd/containerd#8962

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0xaead added a commit to 0xaead/containerd that referenced this pull request Oct 27, 2023

crun features command is added

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1177 fix containers/crun#1237 was merged to master and was tagged `crun-1.8.6' on Jun 27, 2023. Signed-off-by: match man <ppucoder@gmail.com>

0xaead added a commit to 0xaead/go-runc that referenced this pull request Oct 27, 2023

crun features command is added

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1177 fix containers/crun#1237 was merged to master and was tagged `crun-1.8.6' on Jun 27, 2023. Signed-off-by: match man <ppucoder@gmail.com>

0xaead mentioned this pull request Oct 27, 2023

crun features command is added containerd/go-runc#103

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robertgzr mentioned this pull request Nov 9, 2023

Fix build without libcap #1345

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Implement crun features #1237

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sohankunkerkar commented Jun 26, 2023 •

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