Fix high-memlock spec to include complete OCI runtime config
The base_runtime_spec for containerd requires a complete OCI spec, not just the rlimits section. The minimal spec was causing runc to fail with "open /proc/self/fd: no such file or directory" because essential mounts and namespaces were missing. This commit uses kind's default cri-base.json as the base and adds the rlimits configuration on top. The spec includes all necessary mounts, namespaces, capabilities, and kind-specific hooks. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>helm-charts-with-caddy
A. F. Dudley
parent
87db167d7f
commit
86462c940f
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@ -336,19 +336,159 @@ def generate_high_memlock_spec_json():
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The IPC_LOCK capability alone doesn't raise the RLIMIT_MEMLOCK limit - it only
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allows mlock() calls. We need to set the rlimit in the OCI runtime spec.
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IMPORTANT: This must be a complete OCI runtime spec, not just the rlimits
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section. The spec is based on kind's default cri-base.json with rlimits added.
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"""
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import json
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# Use maximum 64-bit signed integer value for unlimited
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max_rlimit = 9223372036854775807
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# Based on kind's /etc/containerd/cri-base.json with rlimits added
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spec = {
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"ociVersion": "1.0.2-dev",
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"ociVersion": "1.1.0-rc.1",
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"process": {
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"user": {"uid": 0, "gid": 0},
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"cwd": "/",
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"capabilities": {
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"bounding": [
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"CAP_CHOWN",
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"CAP_DAC_OVERRIDE",
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"CAP_FSETID",
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"CAP_FOWNER",
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"CAP_MKNOD",
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"CAP_NET_RAW",
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"CAP_SETGID",
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"CAP_SETUID",
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"CAP_SETFCAP",
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"CAP_SETPCAP",
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"CAP_NET_BIND_SERVICE",
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"CAP_SYS_CHROOT",
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"CAP_KILL",
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"CAP_AUDIT_WRITE",
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],
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"effective": [
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"CAP_CHOWN",
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"CAP_DAC_OVERRIDE",
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"CAP_FSETID",
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"CAP_FOWNER",
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"CAP_MKNOD",
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"CAP_NET_RAW",
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"CAP_SETGID",
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"CAP_SETUID",
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"CAP_SETFCAP",
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"CAP_SETPCAP",
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"CAP_NET_BIND_SERVICE",
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"CAP_SYS_CHROOT",
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"CAP_KILL",
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"CAP_AUDIT_WRITE",
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],
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"permitted": [
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"CAP_CHOWN",
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"CAP_DAC_OVERRIDE",
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"CAP_FSETID",
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"CAP_FOWNER",
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"CAP_MKNOD",
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"CAP_NET_RAW",
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"CAP_SETGID",
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"CAP_SETUID",
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"CAP_SETFCAP",
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"CAP_SETPCAP",
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"CAP_NET_BIND_SERVICE",
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"CAP_SYS_CHROOT",
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"CAP_KILL",
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"CAP_AUDIT_WRITE",
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],
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},
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"rlimits": [
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{"type": "RLIMIT_MEMLOCK", "hard": max_rlimit, "soft": max_rlimit},
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{"type": "RLIMIT_NOFILE", "hard": 1048576, "soft": 1048576},
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]
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],
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"noNewPrivileges": True,
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},
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"root": {"path": "rootfs"},
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"mounts": [
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{
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"destination": "/proc",
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"type": "proc",
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"source": "proc",
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"options": ["nosuid", "noexec", "nodev"],
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},
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{
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"destination": "/dev",
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"type": "tmpfs",
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"source": "tmpfs",
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"options": ["nosuid", "strictatime", "mode=755", "size=65536k"],
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},
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{
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"destination": "/dev/pts",
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"type": "devpts",
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"source": "devpts",
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"options": [
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"nosuid",
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"noexec",
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"newinstance",
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"ptmxmode=0666",
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"mode=0620",
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"gid=5",
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],
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},
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{
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"destination": "/dev/shm",
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"type": "tmpfs",
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"source": "shm",
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"options": ["nosuid", "noexec", "nodev", "mode=1777", "size=65536k"],
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},
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{
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"destination": "/dev/mqueue",
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"type": "mqueue",
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"source": "mqueue",
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"options": ["nosuid", "noexec", "nodev"],
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},
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{
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"destination": "/sys",
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"type": "sysfs",
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"source": "sysfs",
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"options": ["nosuid", "noexec", "nodev", "ro"],
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},
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{
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"destination": "/run",
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"type": "tmpfs",
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"source": "tmpfs",
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"options": ["nosuid", "strictatime", "mode=755", "size=65536k"],
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},
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],
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"linux": {
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"resources": {"devices": [{"allow": False, "access": "rwm"}]},
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"cgroupsPath": "/default",
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"namespaces": [
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{"type": "pid"},
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{"type": "ipc"},
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{"type": "uts"},
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{"type": "mount"},
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{"type": "network"},
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],
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"maskedPaths": [
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"/proc/acpi",
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"/proc/asound",
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"/proc/kcore",
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"/proc/keys",
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"/proc/latency_stats",
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"/proc/timer_list",
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"/proc/timer_stats",
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"/proc/sched_debug",
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"/sys/firmware",
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"/proc/scsi",
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],
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"readonlyPaths": [
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"/proc/bus",
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"/proc/fs",
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"/proc/irq",
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"/proc/sys",
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"/proc/sysrq-trigger",
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],
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},
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"hooks": {"createContainer": [{"path": "/kind/bin/mount-product-files.sh"}]},
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}
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return json.dumps(spec, indent=2)
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