v1/

README

Protocol Documentation

Table of Contents

• tetragon/capabilities.proto

  • CapabilitiesType
  • ProcessPrivilegesChanged
  • SecureBitsType

• tetragon/tetragon.proto

  • BinaryProperties

  • Capabilities

  • Container

  • CreateContainer

  • CreateContainer.AnnotationsEntry

  • FileProperties

  • GetHealthStatusRequest

  • GetHealthStatusResponse

  • HealthStatus

  • Image

  • InodeProperties

  • KernelModule

  • KprobeArgument

  • KprobeBpfAttr

  • KprobeBpfMap

  • KprobeCapability

  • KprobeCred

  • KprobeFile

  • KprobeLinuxBinprm

  • KprobeNetDev

  • KprobePath

  • KprobePerfEvent

  • KprobeSkb

  • KprobeSock

  • KprobeTruncatedBytes

  • KprobeUserNamespace

  • Namespace

  • Namespaces

  • Pod

  • Pod.PodLabelsEntry

  • Process

  • ProcessCredentials

  • ProcessExec

  • ProcessExit

  • ProcessKprobe

  • ProcessLoader

  • ProcessTracepoint

  • ProcessUprobe

  • RuntimeHookRequest

  • RuntimeHookResponse

  • StackTraceEntry

  • Test

  • UserNamespace

  • HealthStatusResult

  • HealthStatusType

  • KprobeAction

  • TaintedBitsType

• tetragon/events.proto

  • AggregationInfo

  • AggregationOptions

  • CapFilter

  • CapFilterSet

  • FieldFilter

  • Filter

  • GetEventsRequest

  • GetEventsResponse

  • RateLimitInfo

  • RedactionFilter

  • EventType

  • FieldFilterAction

• tetragon/stack.proto

  • StackAddress
  • StackTrace
  • StackTraceLabel
  • StackTraceNode

• tetragon/sensors.proto

  • AddTracingPolicyRequest

  • AddTracingPolicyResponse

  • DeleteTracingPolicyRequest

  • DeleteTracingPolicyResponse

  • DisableSensorRequest

  • DisableSensorResponse

  • DisableTracingPolicyRequest

  • DisableTracingPolicyResponse

  • EnableSensorRequest

  • EnableSensorResponse

  • EnableTracingPolicyRequest

  • EnableTracingPolicyResponse

  • GetStackTraceTreeRequest

  • GetStackTraceTreeResponse

  • GetVersionRequest

  • GetVersionResponse

  • ListSensorsRequest

  • ListSensorsResponse

  • ListTracingPoliciesRequest

  • ListTracingPoliciesResponse

  • RemoveSensorRequest

  • RemoveSensorResponse

  • SensorStatus

  • TracingPolicyStatus

  • TracingPolicyState

  • FineGuidanceSensors

• Scalar Value Types

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tetragon/capabilities.proto

CapabilitiesType

Name	Number	Description
CAP_CHOWN	0	In a system with the [_POSIX_CHOWN_RESTRICTED] option defined, this overrides the restriction of changing file ownership and group ownership.
DAC_OVERRIDE	1	Override all DAC access, including ACL execute access if [_POSIX_ACL] is defined. Excluding DAC access covered by CAP_LINUX_IMMUTABLE.
CAP_DAC_READ_SEARCH	2	Overrides all DAC restrictions regarding read and search on files and directories, including ACL restrictions if [_POSIX_ACL] is defined. Excluding DAC access covered by "$1"_LINUX_IMMUTABLE.
CAP_FOWNER	3	Overrides all restrictions about allowed operations on files, where file owner ID must be equal to the user ID, except where CAP_FSETID is applicable. It doesn't override MAC and DAC restrictions.
CAP_FSETID	4	Overrides the following restrictions that the effective user ID shall match the file owner ID when setting the S_ISUID and S_ISGID bits on that file; that the effective group ID (or one of the supplementary group IDs) shall match the file owner ID when setting the S_ISGID bit on that file; that the S_ISUID and S_ISGID bits are cleared on successful return from chown(2) (not implemented).
CAP_KILL	5	Overrides the restriction that the real or effective user ID of a process sending a signal must match the real or effective user ID of the process receiving the signal.
CAP_SETGID	6	Allows forged gids on socket credentials passing.
CAP_SETUID	7	Allows forged pids on socket credentials passing.
CAP_SETPCAP	8	Without VFS support for capabilities: Transfer any capability in your permitted set to any pid, remove any capability in your permitted set from any pid With VFS support for capabilities (neither of above, but) Add any capability from current's capability bounding set to the current process' inheritable set Allow taking bits out of capability bounding set Allow modification of the securebits for a process
CAP_LINUX_IMMUTABLE	9	Allow modification of S_IMMUTABLE and S_APPEND file attributes
CAP_NET_BIND_SERVICE	10	Allows binding to ATM VCIs below 32
CAP_NET_BROADCAST	11	Allow broadcasting, listen to multicast
CAP_NET_ADMIN	12	Allow activation of ATM control sockets
CAP_NET_RAW	13	Allow binding to any address for transparent proxying (also via NET_ADMIN)
CAP_IPC_LOCK	14	Allow mlock and mlockall (which doesn't really have anything to do with IPC)
CAP_IPC_OWNER	15	Override IPC ownership checks
CAP_SYS_MODULE	16	Insert and remove kernel modules - modify kernel without limit
CAP_SYS_RAWIO	17	Allow sending USB messages to any device via /dev/bus/usb
CAP_SYS_CHROOT	18	Allow use of chroot()
CAP_SYS_PTRACE	19	Allow ptrace() of any process
CAP_SYS_PACCT	20	Allow configuration of process accounting
CAP_SYS_ADMIN	21	Allow everything under CAP_BPF and CAP_PERFMON for backward compatibility
CAP_SYS_BOOT	22	Allow use of reboot()
CAP_SYS_NICE	23	Allow setting cpu affinity on other processes
CAP_SYS_RESOURCE	24	Control memory reclaim behavior
CAP_SYS_TIME	25	Allow setting the real-time clock
CAP_SYS_TTY_CONFIG	26	Allow vhangup() of tty
CAP_MKNOD	27	Allow the privileged aspects of mknod()
CAP_LEASE	28	Allow taking of leases on files
CAP_AUDIT_WRITE	29	Allow writing the audit log via unicast netlink socket
CAP_AUDIT_CONTROL	30	Allow configuration of audit via unicast netlink socket
CAP_SETFCAP	31	Set or remove capabilities on files
CAP_MAC_OVERRIDE	32	Override MAC access. The base kernel enforces no MAC policy. An LSM may enforce a MAC policy, and if it does and it chooses to implement capability based overrides of that policy, this is the capability it should use to do so.
CAP_MAC_ADMIN	33	Allow MAC configuration or state changes. The base kernel requires no MAC configuration. An LSM may enforce a MAC policy, and if it does and it chooses to implement capability based checks on modifications to that policy or the data required to maintain it, this is the capability it should use to do so.
CAP_SYSLOG	34	Allow configuring the kernel's syslog (printk behaviour)
CAP_WAKE_ALARM	35	Allow triggering something that will wake the system
CAP_BLOCK_SUSPEND	36	Allow preventing system suspends
CAP_AUDIT_READ	37	Allow reading the audit log via multicast netlink socket
CAP_PERFMON	38	Allow system performance and observability privileged operations using perf_events, i915_perf and other kernel subsystems
CAP_BPF	39	CAP_BPF allows the following BPF operations: - Creating all types of BPF maps - Advanced verifier features - Indirect variable access - Bounded loops - BPF to BPF function calls - Scalar precision tracking - Larger complexity limits - Dead code elimination - And potentially other features - Loading BPF Type Format (BTF) data - Retrieve xlated and JITed code of BPF programs - Use bpf_spin_lock() helper CAP_PERFMON relaxes the verifier checks further: - BPF progs can use of pointer-to-integer conversions - speculation attack hardening measures are bypassed - bpf_probe_read to read arbitrary kernel memory is allowed - bpf_trace_printk to print kernel memory is allowed CAP_SYS_ADMIN is required to use bpf_probe_write_user. CAP_SYS_ADMIN is required to iterate system wide loaded programs, maps, links, BTFs and convert their IDs to file descriptors. CAP_PERFMON and CAP_BPF are required to load tracing programs. CAP_NET_ADMIN and CAP_BPF are required to load networking programs.
CAP_CHECKPOINT_RESTORE	40	Allow writing to ns_last_pid

ProcessPrivilegesChanged

Reasons of why the process privileges changed.

Name	Number	Description
PRIVILEGES_CHANGED_UNSET	0
PRIVILEGES_RAISED_EXEC_FILE_CAP	1	A privilege elevation happened due to the execution of a binary with file capability sets. The kernel supports associating capability sets with an executable file using setcap command. The file capability sets are stored in an extended attribute (see https://man7.org/linux/man-pages/man7/xattr.7.html) named security.capability. The file capability sets, in conjunction with the capability sets of the process, determine the process capabilities and privileges after the execve system call. For further reference, please check sections File capability extended attribute versioning and Namespaced file capabilities of the capabilities man pages: https://man7.org/linux/man-pages/man7/capabilities.7.html. The new granted capabilities can be listed inside the process object.
PRIVILEGES_RAISED_EXEC_FILE_SETUID	2	A privilege elevation happened due to the execution of a binary with set-user-ID to root. When a process with nonzero UIDs executes a binary with a set-user-ID to root also known as suid-root executable, then the kernel switches the effective user ID to 0 (root) which is a privilege elevation operation since it grants access to resources owned by the root user. The effective user ID is listed inside the process_credentials part of the process object. For further reading, section Capabilities and execution of programs by root of https://man7.org/linux/man-pages/man7/capabilities.7.html. Afterward the kernel recalculates the capability sets of the process and grants all capabilities in the permitted and effective capability sets, except those masked out by the capability bounding set. If the binary also have file capability sets then these bits are honored and the process gains just the capabilities granted by the file capability sets (i.e., not all capabilities, as it would occur when executing a set-user-ID to root binary that does not have any associated file capabilities). This is described in section Set-user-ID-root programs that have file capabilities of https://man7.org/linux/man-pages/man7/capabilities.7.html. The new granted capabilities can be listed inside the process object. There is one exception for the special treatments of set-user-ID to root execution receiving all capabilities, if the SecBitNoRoot bit of the Secure bits is set, then the kernel does not grant any capability. Please check section: The securebits flags: establishing a capabilities-only environment of the capabilities man pages: https://man7.org/linux/man-pages/man7/capabilities.7.html
PRIVILEGES_RAISED_EXEC_FILE_SETGID	3	A privilege elevation happened due to the execution of a binary with set-group-ID to root. When a process with nonzero GIDs executes a binary with a set-group-ID to root, the kernel switches the effective group ID to 0 (root) which is a privilege elevation operation since it grants access to resources owned by the root group. The effective group ID is listed inside the process_credentials part of the process object.

SecureBitsType

Name	Number	Description
SecBitNotSet	0
SecBitNoRoot	1	When set UID 0 has no special privileges. When unset, inheritance of root-permissions and suid-root executable under compatibility mode is supported. If the effective uid of the new process is 0 then the effective and inheritable bitmasks of the executable file is raised. If the real uid is 0, the effective (legacy) bit of the executable file is raised.
SecBitNoRootLocked	2	Make bit-0 SecBitNoRoot immutable
SecBitNoSetUidFixup	4	When set, setuid to/from uid 0 does not trigger capability-"fixup". When unset, to provide compatiblility with old programs relying on set*uid to gain/lose privilege, transitions to/from uid 0 cause capabilities to be gained/lost.
SecBitNoSetUidFixupLocked	8	Make bit-2 SecBitNoSetUidFixup immutable
SecBitKeepCaps	16	When set, a process can retain its capabilities even after transitioning to a non-root user (the set-uid fixup suppressed by bit 2). Bit-4 is cleared when a process calls exec(); setting both bit 4 and 5 will create a barrier through exec that no exec()'d child can use this feature again.
SecBitKeepCapsLocked	32	Make bit-4 SecBitKeepCaps immutable
SecBitNoCapAmbientRaise	64	When set, a process cannot add new capabilities to its ambient set.
SecBitNoCapAmbientRaiseLocked	128	Make bit-6 SecBitNoCapAmbientRaise immutable

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tetragon/tetragon.proto

BinaryProperties

Field	Type	Label	Description
setuid	google.protobuf.UInt32Value		If set then this is the set user ID used for execution
setgid	google.protobuf.UInt32Value		If set then this is the set group ID used for execution
privileges_changed	ProcessPrivilegesChanged	repeated	The reasons why this binary execution changed privileges. Usually this happens when the process executes a binary with the set-user-ID to root or file capability sets. The final granted privileges can be listed inside the process_credentials or capabilities fields part of of the process object.
file	FileProperties		File properties in case the executed binary is: 1. An anonymous shared memory file https://man7.org/linux/man-pages/man7/shm_overview.7.html. 2. An anonymous file obtained with memfd API https://man7.org/linux/man-pages/man2/memfd_create.2.html. 3. Or it was deleted from the file system.

Capabilities

Field	Type	Label	Description
permitted	CapabilitiesType	repeated	Permitted set indicates what capabilities the process can use. This is a limiting superset for the effective capabilities that the thread may assume. It is also a limiting superset for the capabilities that may be added to the inheritable set by a thread without the CAP_SETPCAP in its effective set.
effective	CapabilitiesType	repeated	Effective set indicates what capabilities are active in a process. This is the set used by the kernel to perform permission checks for the thread.
inheritable	CapabilitiesType	repeated	Inheritable set indicates which capabilities will be inherited by the current process when running as a root user.

Container

Field	Type	Label	Description
id	string		Identifier of the container.
name	string		Name of the container.
image	Image		Image of the container.
start_time	google.protobuf.Timestamp		Start time of the container.
pid	google.protobuf.UInt32Value		Process identifier in the container namespace.
maybe_exec_probe	bool		If this is set true, it means that the process might have been originated from a Kubernetes exec probe. For this field to be true, the following must be true: 1. The binary field matches the first element of the exec command list for either liveness or readiness probe excluding the basename. For example, "/bin/ls" and "ls" are considered a match. 2. The arguments field exactly matches the rest of the exec command list.

CreateContainer

CreateContainer informs the agent that a container was created This is intented to be used by OCI hooks (but not limited to them) and corresponds to the CreateContainer hook: https://github.com/opencontainers/runtime-spec/blob/main/config.md#createcontainer-hooks.

Field	Type	Label	Description
cgroupsPath	string		cgroupsPath is the cgroups path for the container. The path is expected to be relative to the cgroups mountpoint. See: https://github.com/opencontainers/runtime-spec/blob/58ec43f9fc39e0db229b653ae98295bfde74aeab/specs-go/config.go#L174
rootDir	string		rootDir is the absolute path of the root directory of the container. See: https://github.com/opencontainers/runtime-spec/blob/main/specs-go/config.go#L174
annotations	CreateContainer.AnnotationsEntry	repeated	annotations are the run-time annotations for the container see https://github.com/opencontainers/runtime-spec/blob/main/config.md#annotations
containerName	string		containerName is the name of the container

CreateContainer.AnnotationsEntry

Field	Type	Label	Description
key	string
value	string

FileProperties

Field	Type	Label	Description
inode	InodeProperties		Inode of the file
path	string		Path of the file

GetHealthStatusRequest

Field	Type	Label	Description
event_set	HealthStatusType	repeated

GetHealthStatusResponse

Field	Type	Label	Description
health_status	HealthStatus	repeated

HealthStatus

Field	Type	Label	Description
event	HealthStatusType
status	HealthStatusResult
details	string

Image

Field	Type	Label	Description
id	string		Identifier of the container image composed of the registry path and the sha256.
name	string		Name of the container image composed of the registry path and the tag.

InodeProperties

Field	Type	Label	Description
number	uint64		The inode number
links	google.protobuf.UInt32Value		The inode links on the file system. If zero means the file is only in memory

KernelModule

Field	Type	Label	Description
name	string		Kernel module name
signature_ok	google.protobuf.BoolValue		If true the module signature was verified successfully. Depends on kernels compiled with CONFIG_MODULE_SIG option, for details please read: https://www.kernel.org/doc/Documentation/admin-guide/module-signing.rst
tainted	TaintedBitsType	repeated	The module tainted flags that will be applied on the kernel. For further details please read: https://docs.kernel.org/admin-guide/tainted-kernels.html

KprobeArgument

Field	Type	Label	Description
string_arg	string
int_arg	int32
skb_arg	KprobeSkb
size_arg	uint64
bytes_arg	bytes
path_arg	KprobePath
file_arg	KprobeFile
truncated_bytes_arg	KprobeTruncatedBytes
sock_arg	KprobeSock
cred_arg	KprobeCred
long_arg	int64
bpf_attr_arg	KprobeBpfAttr
perf_event_arg	KprobePerfEvent
bpf_map_arg	KprobeBpfMap
uint_arg	uint32
user_namespace_arg	KprobeUserNamespace		Deprecated.
capability_arg	KprobeCapability
process_credentials_arg	ProcessCredentials
user_ns_arg	UserNamespace
module_arg	KernelModule
kernel_cap_t_arg	string		Capabilities in hexadecimal format.
cap_inheritable_arg	string		Capabilities inherited by a forked process in hexadecimal format.
cap_permitted_arg	string		Capabilities that are currently permitted in hexadecimal format.
cap_effective_arg	string		Capabilities that are actually used in hexadecimal format.
linux_binprm_arg	KprobeLinuxBinprm
net_dev_arg	KprobeNetDev
label	string

KprobeBpfAttr

Field	Type	Label	Description
ProgType	string
InsnCnt	uint32
ProgName	string

KprobeBpfMap

Field	Type	Label	Description
MapType	string
KeySize	uint32
ValueSize	uint32
MaxEntries	uint32
MapName	string

KprobeCapability

Field	Type	Label	Description
value	google.protobuf.Int32Value
name	string

KprobeCred

Field	Type	Label	Description
permitted	CapabilitiesType	repeated
effective	CapabilitiesType	repeated
inheritable	CapabilitiesType	repeated

KprobeFile

Field	Type	Label	Description
mount	string
path	string
flags	string
permission	string

KprobeLinuxBinprm

Field	Type	Label	Description
path	string
flags	string
permission	string

KprobeNetDev

Field	Type	Label	Description
name	string

KprobePath

Field	Type	Label	Description
mount	string
path	string
flags	string
permission	string

KprobePerfEvent

Field	Type	Label	Description
KprobeFunc	string
Type	string
Config	uint64
ProbeOffset	uint64

KprobeSkb

Field	Type	Label	Description
hash	uint32
len	uint32
priority	uint32
mark	uint32
saddr	string
daddr	string
sport	uint32
dport	uint32
proto	uint32
sec_path_len	uint32
sec_path_olen	uint32
protocol	string
family	string

KprobeSock

Field	Type	Label	Description
family	string
type	string
protocol	string
mark	uint32
priority	uint32
saddr	string
daddr	string
sport	uint32
dport	uint32
cookie	uint64
state	string

KprobeTruncatedBytes

Field	Type	Label	Description
bytes_arg	bytes
orig_size	uint64

KprobeUserNamespace

Field	Type	Label	Description
level	google.protobuf.Int32Value
owner	google.protobuf.UInt32Value
group	google.protobuf.UInt32Value
ns	Namespace

Namespace

Field	Type	Label	Description
inum	uint32		Inode number of the namespace.
is_host	bool		Indicates if namespace belongs to host.

Namespaces

Field	Type	Label	Description
uts	Namespace		Hostname and NIS domain name.
ipc	Namespace		System V IPC, POSIX message queues.
mnt	Namespace		Mount points.
pid	Namespace		Process IDs.
pid_for_children	Namespace		Process IDs for children processes.
net	Namespace		Network devices, stacks, ports, etc.
time	Namespace		Boot and monotonic clocks.
time_for_children	Namespace		Boot and monotonic clocks for children processes.
cgroup	Namespace		Cgroup root directory.
user	Namespace		User and group IDs.

Pod

Field	Type	Label	Description
namespace	string		Kubernetes namespace of the Pod.
name	string		Name of the Pod.
container	Container		Container of the Pod from which the process that triggered the event originates.
pod_labels	Pod.PodLabelsEntry	repeated	Contains all the labels of the pod.
workload	string		Kubernetes workload of the Pod.
workload_kind	string		Kubernetes workload kind (e.g. "Deployment", "DaemonSet") of the Pod.

Pod.PodLabelsEntry

Field	Type	Label	Description
key	string
value	string

Process

Field	Type	Label	Description
exec_id	string		Exec ID uniquely identifies the process over time across all the nodes in the cluster.
pid	google.protobuf.UInt32Value		Process identifier from host PID namespace.
uid	google.protobuf.UInt32Value		User identifier associated with the process.
cwd	string		Current working directory of the process.
binary	string		Absolute path of the executed binary.
arguments	string		Arguments passed to the binary at execution.
flags	string		Flags are for debugging purposes only and should not be considered a reliable source of information. They hold various information about which syscalls generated events, use of internal Tetragon buffers, errors and more. - execve This event is generated by an execve syscall for a new process. See procFs for the other option. A correctly formatted event should either set execve or procFS (described next). - procFS This event is generated from a proc interface. This happens at Tetragon init when existing processes are being loaded into Tetragon event buffer. All events should have either execve or procFS set. - truncFilename Indicates a truncated processes filename because the buffer size is too small to contain the process filename. Consider increasing buffer size to avoid this. - truncArgs Indicates truncated the processes arguments because the buffer size was too small to contain all exec args. Consider increasing buffer size to avoid this. - taskWalk Primarily useful for debugging. Indicates a walked process hierarchy to find a parent process in the Tetragon buffer. This may happen when we did not receive an exec event for the immediate parent of a process. Typically means we are looking at a fork that in turn did another fork we don't currently track fork events exactly and instead push an event with the original parent exec data. This flag can provide this insight into the event if needed. - miss An error flag indicating we could not find parent info in the Tetragon event buffer. If this is set it should be reported to Tetragon developers for debugging. Tetragon will do its best to recover information about the process from available kernel data structures instead of using cached info in this case. However, args will not be available. - needsAUID An internal flag for Tetragon to indicate the audit has not yet been resolved. The BPF hooks look at this flag to determine if probing the audit system is necessary. - errorFilename An error flag indicating an error happened while reading the filename. If this is set it should be reported to Tetragon developers for debugging. - errorArgs An error flag indicating an error happened while reading the process args. If this is set it should be reported to Tetragon developers for debugging - needsCWD An internal flag for Tetragon to indicate the current working directory has not yet been resolved. The Tetragon hooks look at this flag to determine if probing the CWD is necessary. - noCWDSupport Indicates that CWD is removed from the event because the buffer size is too small. Consider increasing buffer size to avoid this. - rootCWD Indicates that CWD is the root directory. This is necessary to inform readers the CWD is not in the event buffer and is '/' instead. - errorCWD An error flag indicating an error occurred while reading the CWD of a process. If this is set it should be reported to Tetragon developers for debugging. - clone Indicates the process issued a clone before exec*. This is the general flow to exec* a new process, however its possible to replace the current process with a new process by doing an exec* without a clone. In this case the flag will be omitted and the same PID will be used by the kernel for both the old process and the newly exec'd process.
start_time	google.protobuf.Timestamp		Start time of the execution.
auid	google.protobuf.UInt32Value		Audit user ID, this ID is assigned to a user upon login and is inherited by every process even when the user's identity changes. For example, by switching user accounts with su - john.
pod	Pod		Information about the the Kubernetes Pod where the event originated.
docker	string		The 15 first digits of the container ID.
parent_exec_id	string		Exec ID of the parent process.
refcnt	uint32		Reference counter from the Tetragon process cache.
cap	Capabilities		Set of capabilities that define the permissions the process can execute with.
ns	Namespaces		Linux namespaces of the process, disabled by default, can be enabled by the --enable-process-ns flag.
tid	google.protobuf.UInt32Value		Thread ID, note that for the thread group leader, tid is equal to pid.
process_credentials	ProcessCredentials		Process credentials
binary_properties	BinaryProperties		Executed binary properties. This field is only available on ProcessExec events.

ProcessCredentials

Field	Type	Label	Description
uid	google.protobuf.UInt32Value		The real user ID
gid	google.protobuf.UInt32Value		The real group ID
euid	google.protobuf.UInt32Value		The effective user ID
egid	google.protobuf.UInt32Value		The effective group ID
suid	google.protobuf.UInt32Value		The saved user ID
sgid	google.protobuf.UInt32Value		The saved group ID
fsuid	google.protobuf.UInt32Value		the filesystem user ID
fsgid	google.protobuf.UInt32Value		The filesystem group ID
securebits	SecureBitsType	repeated	Secure management flags
caps	Capabilities		Set of capabilities that define the permissions the process can execute with.
user_ns	UserNamespace		User namespace where the UIDs, GIDs and capabilities are relative to.

ProcessExec

Field	Type	Label	Description
process	Process		Process that triggered the exec.
parent	Process		Immediate parent of the process.
ancestors	Process	repeated	Ancestors of the process beyond the immediate parent.

ProcessExit

Field	Type	Label	Description
process	Process		Process that triggered the exit.
parent	Process		Immediate parent of the process.
signal	string		Signal that the process received when it exited, for example SIGKILL or SIGTERM (list all signal names with kill -l). If there is no signal handler implemented for a specific process, we report the exit status code that can be found in the status field.
status	uint32		Status code on process exit. For example, the status code can indicate if an error was encountered or the program exited successfully.
time	google.protobuf.Timestamp		Date and time of the event.

ProcessKprobe

Field	Type	Label	Description
process	Process		Process that triggered the kprobe.
parent	Process		Immediate parent of the process.
function_name	string		Symbol on which the kprobe was attached.
args	KprobeArgument	repeated	Arguments definition of the observed kprobe.
return	KprobeArgument		Return value definition of the observed kprobe.
action	KprobeAction		Action performed when the kprobe matched.
kernel_stack_trace	StackTraceEntry	repeated	Kernel stack trace to the call.
policy_name	string		Name of the Tracing Policy that created that kprobe.
return_action	KprobeAction		Action performed when the return kprobe executed.
message	string		Short message of the Tracing Policy to inform users what is going on.
tags	string	repeated	Tags of the Tracing Policy to categorize the event.
user_stack_trace	StackTraceEntry	repeated	User-mode stack trace to the call.

ProcessLoader

loader sensor event triggered for loaded binary/library

Field	Type	Label	Description
process	Process
path	string
buildid	bytes

ProcessTracepoint

Field	Type	Label	Description
process	Process		Process that triggered the tracepoint.
parent	Process		Immediate parent of the process.
subsys	string		Subsystem of the tracepoint.
event	string		Event of the subsystem.
args	KprobeArgument	repeated	Arguments definition of the observed tracepoint. TODO: once we implement all we want, rename KprobeArgument to GenericArgument
policy_name	string		Name of the policy that created that tracepoint.
action	KprobeAction		Action performed when the tracepoint matched.
message	string		Short message of the Tracing Policy to inform users what is going on.
tags	string	repeated	Tags of the Tracing Policy to categorize the event.

ProcessUprobe

Field	Type	Label	Description
process	Process
parent	Process
path	string
symbol	string
policy_name	string		Name of the policy that created that uprobe.
message	string		Short message of the Tracing Policy to inform users what is going on.
args	KprobeArgument	repeated	Arguments definition of the observed uprobe.
tags	string	repeated	Tags of the Tracing Policy to categorize the event.

RuntimeHookRequest

RuntimeHookRequest synchronously propagates information to the agent about run-time state.

Field	Type	Label	Description
createContainer	CreateContainer

RuntimeHookResponse

StackTraceEntry

Field	Type	Label	Description
address	uint64		linear address of the function in kernel or user space.
offset	uint64		offset is the offset into the native instructions for the function.
symbol	string		symbol is the symbol name of the function.
module	string		module path for user space addresses.

Test

Field	Type	Label	Description
arg0	uint64
arg1	uint64
arg2	uint64
arg3	uint64

UserNamespace

Field	Type	Label	Description
level	google.protobuf.Int32Value		Nested level of the user namespace. Init or host user namespace is at level 0.
uid	google.protobuf.UInt32Value		The owner user ID of the namespace
gid	google.protobuf.UInt32Value		The owner group ID of the namepace.
ns	Namespace		The user namespace details that include the inode number of the namespace.

HealthStatusResult

Name	Number	Description
HEALTH_STATUS_UNDEF	0
HEALTH_STATUS_RUNNING	1
HEALTH_STATUS_STOPPED	2
HEALTH_STATUS_ERROR	3

HealthStatusType

Name	Number	Description
HEALTH_STATUS_TYPE_UNDEF	0
HEALTH_STATUS_TYPE_STATUS	1

KprobeAction

Name	Number	Description
KPROBE_ACTION_UNKNOWN	0	Unknown action
KPROBE_ACTION_POST	1	Post action creates an event (default action).
KPROBE_ACTION_FOLLOWFD	2	Post action creates a mapping between file descriptors and file names.
KPROBE_ACTION_SIGKILL	3	Sigkill action synchronously terminates the process.
KPROBE_ACTION_UNFOLLOWFD	4	Post action removes a mapping between file descriptors and file names.
KPROBE_ACTION_OVERRIDE	5	Override action modifies the return value of the call.
KPROBE_ACTION_COPYFD	6	Post action dupplicates a mapping between file descriptors and file names.
KPROBE_ACTION_GETURL	7	GetURL action issue an HTTP Get request against an URL from userspace.
KPROBE_ACTION_DNSLOOKUP	8	GetURL action issue a DNS lookup against an URL from userspace.
KPROBE_ACTION_NOPOST	9	NoPost action suppresses the transmission of the event to userspace.
KPROBE_ACTION_SIGNAL	10	Signal action sends specified signal to the process.
KPROBE_ACTION_TRACKSOCK	11	TrackSock action tracks socket.
KPROBE_ACTION_UNTRACKSOCK	12	UntrackSock action un-tracks socket.
KPROBE_ACTION_NOTIFYENFORCER	13	NotifyEnforcer action notifies killer sensor.

TaintedBitsType

Tainted bits to indicate if the kernel was tainted. For further details: https://docs.kernel.org/admin-guide/tainted-kernels.html

Name	Number	Description
TAINT_UNSET	0
TAINT_PROPRIETARY_MODULE	1	A proprietary module was loaded.
TAINT_FORCED_MODULE	2	A module was force loaded.
TAINT_FORCED_UNLOAD_MODULE	4	A module was force unloaded.
TAINT_STAGED_MODULE	1024	A staging driver was loaded.
TAINT_OUT_OF_TREE_MODULE	4096	An out of tree module was loaded.
TAINT_UNSIGNED_MODULE	8192	An unsigned module was loaded. Supported only on kernels built with CONFIG_MODULE_SIG option.
TAINT_KERNEL_LIVE_PATCH_MODULE	32768	The kernel has been live patched.
TAINT_TEST_MODULE	262144	Loading a test module.

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tetragon/events.proto

AggregationInfo

AggregationInfo contains information about aggregation results.

Field	Type	Label	Description
count	uint64		Total count of events in this aggregation time window.

AggregationOptions

AggregationOptions defines configuration options for aggregating events.

Field	Type	Label	Description
window_size	google.protobuf.Duration		Aggregation window size. Defaults to 15 seconds if this field is not set.
channel_buffer_size	uint64		Size of the buffer for the aggregator to receive incoming events. If the buffer becomes full, the aggregator will log a warning and start dropping incoming events.

CapFilter

Filter over a set of Linux process capabilities. See message Capabilities for more info. WARNING: Multiple sets are ANDed. For example, if the permitted filter matches, but the effective filter does not, the filter will NOT match.

Field	Type	Label	Description
permitted	CapFilterSet		Filter over the set of permitted capabilities.
effective	CapFilterSet		Filter over the set of effective capabilities.
inheritable	CapFilterSet		Filter over the set of inheritable capabilities.

CapFilterSet

Capability set to filter over. NOTE: you may specify only ONE set here.

Field	Type	Label	Description
any	CapabilitiesType	repeated	Match if the capability set contains any of the capabilities defined in this filter.
all	CapabilitiesType	repeated	Match if the capability set contains all of the capabilities defined in this filter.
exactly	CapabilitiesType	repeated	Match if the capability set exactly matches all of the capabilities defined in this filter.
none	CapabilitiesType	repeated	Match if the capability set contains none of the capabilities defined in this filter.

FieldFilter

Field	Type	Label	Description
event_set	EventType	repeated	Event types to filter or undefined to filter over all event types.
fields	google.protobuf.FieldMask		Fields to include or exclude.
action	FieldFilterAction		Whether to include or exclude fields.
invert_event_set	google.protobuf.BoolValue		Whether or not the event set filter should be inverted.

Filter

Field	Type	Label	Description
binary_regex	string	repeated
namespace	string	repeated
health_check	google.protobuf.BoolValue
pid	uint32	repeated
pid_set	uint32	repeated	Filter by the PID of a process and any of its descendants. Note that this filter is intended for testing and development purposes only and should not be used in production. In particular, PID cycling in the OS over longer periods of time may cause unexpected events to pass this filter.
event_set	EventType	repeated
pod_regex	string	repeated	Filter by process.pod.name field using RE2 regular expression syntax: https://github.com/google/re2/wiki/Syntax
arguments_regex	string	repeated	Filter by process.arguments field using RE2 regular expression syntax: https://github.com/google/re2/wiki/Syntax
labels	string	repeated	Filter events by pod labels using Kubernetes label selector syntax: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/#label-selectors Note that this filter never matches events without the pod field (i.e. host process events).
policy_names	string	repeated	Filter events by tracing policy names
capabilities	CapFilter		Filter events by Linux process capability

GetEventsRequest

Field	Type	Label	Description
allow_list	Filter	repeated	allow_list specifies a list of filters to apply to only return certain events. If multiple filters are specified, at least one of them has to match for an event to be included in the results.
deny_list	Filter	repeated	deny_list specifies a list of filters to apply to exclude certain events from the results. If multiple filters are specified, at least one of them has to match for an event to be excluded. If both allow_list and deny_list are specified, the results contain the set difference allow_list - deny_list.
aggregation_options	AggregationOptions		aggregation_options configures aggregation options for this request. If this field is not set, responses will not be aggregated. Note that currently only process_accept and process_connect events are aggregated. Other events remain unaggregated.
field_filters	FieldFilter	repeated	Fields to include or exclude for events in the GetEventsResponse. Omitting this field implies that all fields will be included. Exclusion always takes precedence over inclusion in the case of conflicts.

GetEventsResponse

Field	Type	Label	Description
process_exec	ProcessExec		ProcessExec event includes information about the execution of binaries and other related process metadata.
process_exit	ProcessExit		ProcessExit event indicates how and when a process terminates.
process_kprobe	ProcessKprobe		ProcessKprobe event contains information about the pre-defined functions and the process that invoked them.
process_tracepoint	ProcessTracepoint		ProcessTracepoint contains information about the pre-defined tracepoint and the process that invoked them.
process_loader	ProcessLoader
process_uprobe	ProcessUprobe
test	Test
rate_limit_info	RateLimitInfo
node_name	string		Name of the node where this event was observed.
time	google.protobuf.Timestamp		Timestamp at which this event was observed. For an aggregated response, this field to set to the timestamp at which the event was observed for the first time in a given aggregation time window.
aggregation_info	AggregationInfo		aggregation_info contains information about aggregation results. This field is set only for aggregated responses.

RateLimitInfo

Field	Type	Label	Description
number_of_dropped_process_events	uint64

RedactionFilter

Field	Type	Label	Description
match	Filter	repeated	Deprecated. Deprecated, do not use.
redact	string	repeated	RE2 regular expressions to use for redaction. Strings inside capture groups are redacted.
binary_regex	string	repeated	RE2 regular expression to match binary name. If supplied, redactions will only be applied to matching processes.

EventType

Represents the type of a Tetragon event.

NOTE: EventType constants must be in sync with the numbers used in the GetEventsResponse event oneof.

Name	Number	Description
UNDEF	0
PROCESS_EXEC	1
PROCESS_EXIT	5
PROCESS_KPROBE	9
PROCESS_TRACEPOINT	10
PROCESS_LOADER	11
PROCESS_UPROBE	12
TEST	40000
RATE_LIMIT_INFO	40001

FieldFilterAction

Determines the behavior of a field filter

Name	Number	Description
INCLUDE	0
EXCLUDE	1

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tetragon/stack.proto

StackAddress

Field	Type	Label	Description
address	uint64
symbol	string

StackTrace

Field	Type	Label	Description
addresses	StackAddress	repeated

StackTraceLabel

Field	Type	Label	Description
key	string
count	uint64

StackTraceNode

Field	Type	Label	Description
address	StackAddress
count	uint64
labels	StackTraceLabel	repeated
children	StackTraceNode	repeated

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tetragon/sensors.proto

AddTracingPolicyRequest

Field	Type	Label	Description
yaml	string

AddTracingPolicyResponse

DeleteTracingPolicyRequest

Field	Type	Label	Description
name	string

DeleteTracingPolicyResponse

DisableSensorRequest

Field	Type	Label	Description
name	string

DisableSensorResponse

DisableTracingPolicyRequest

Field	Type	Label	Description
name	string

DisableTracingPolicyResponse

EnableSensorRequest

Field	Type	Label	Description
name	string

EnableSensorResponse

EnableTracingPolicyRequest

Field	Type	Label	Description
name	string

EnableTracingPolicyResponse

GetStackTraceTreeRequest

Field	Type	Label	Description
name	string

GetStackTraceTreeResponse

Field	Type	Label	Description
root	StackTraceNode

GetVersionRequest

GetVersionResponse

Field	Type	Label	Description
version	string

ListSensorsRequest

ListSensorsResponse

Field	Type	Label	Description
sensors	SensorStatus	repeated

ListTracingPoliciesRequest

ListTracingPoliciesResponse

Field	Type	Label	Description
policies	TracingPolicyStatus	repeated

RemoveSensorRequest

Field	Type	Label	Description
name	string

RemoveSensorResponse

SensorStatus

Field	Type	Label	Description
name	string		name is the name of the sensor
enabled	bool		enabled marks whether the sensor is enabled
collection	string		collection is the collection the sensor belongs to (typically a tracing policy)

TracingPolicyStatus

Field	Type	Label	Description
id	uint64		id is the id of the policy
name	string		name is the name of the policy
namespace	string		namespace is the namespace of the policy (or empty of the policy is global)
info	string		info is additional information about the policy
sensors	string	repeated	sensors loaded in the scope of this policy
enabled	bool		Deprecated. indicating if the policy is enabled. Deprecated: use 'state' instead.
filter_id	uint64		filter ID of the policy used for k8s filtering
error	string		potential error of the policy
state	TracingPolicyState		current state of the tracing policy

TracingPolicyState

Name	Number	Description
TP_STATE_UNKNOWN	0	unknown state
TP_STATE_ENABLED	1	loaded and enabled
TP_STATE_DISABLED	2	loaded but disabled
TP_STATE_LOAD_ERROR	3	failed to load
TP_STATE_ERROR	4	failed during lifetime

FineGuidanceSensors

Method Name	Request Type	Response Type	Description
GetEvents	GetEventsRequest	GetEventsResponse stream
GetHealth	GetHealthStatusRequest	GetHealthStatusResponse
AddTracingPolicy	AddTracingPolicyRequest	AddTracingPolicyResponse
DeleteTracingPolicy	DeleteTracingPolicyRequest	DeleteTracingPolicyResponse
RemoveSensor	RemoveSensorRequest	RemoveSensorResponse
ListTracingPolicies	ListTracingPoliciesRequest	ListTracingPoliciesResponse
EnableTracingPolicy	EnableTracingPolicyRequest	EnableTracingPolicyResponse
DisableTracingPolicy	DisableTracingPolicyRequest	DisableTracingPolicyResponse
ListSensors	ListSensorsRequest	ListSensorsResponse
EnableSensor	EnableSensorRequest	EnableSensorResponse
DisableSensor	DisableSensorRequest	DisableSensorResponse
GetStackTraceTree	GetStackTraceTreeRequest	GetStackTraceTreeResponse
GetVersion	GetVersionRequest	GetVersionResponse
RuntimeHook	RuntimeHookRequest	RuntimeHookResponse

Scalar Value Types

.proto Type	Notes	C++	Java	Python	Go	C#	PHP	Ruby
double		double	double	float	float64	double	float	Float
float		float	float	float	float32	float	float	Float
int32	Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint32 instead.	int32	int	int	int32	int	integer	Bignum or Fixnum (as required)
int64	Uses variable-length encoding. Inefficient for encoding negative numbers – if your field is likely to have negative values, use sint64 instead.	int64	long	int/long	int64	long	integer/string	Bignum
uint32	Uses variable-length encoding.	uint32	int	int/long	uint32	uint	integer	Bignum or Fixnum (as required)
uint64	Uses variable-length encoding.	uint64	long	int/long	uint64	ulong	integer/string	Bignum or Fixnum (as required)
sint32	Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int32s.	int32	int	int	int32	int	integer	Bignum or Fixnum (as required)
sint64	Uses variable-length encoding. Signed int value. These more efficiently encode negative numbers than regular int64s.	int64	long	int/long	int64	long	integer/string	Bignum
fixed32	Always four bytes. More efficient than uint32 if values are often greater than 2^28.	uint32	int	int	uint32	uint	integer	Bignum or Fixnum (as required)
fixed64	Always eight bytes. More efficient than uint64 if values are often greater than 2^56.	uint64	long	int/long	uint64	ulong	integer/string	Bignum
sfixed32	Always four bytes.	int32	int	int	int32	int	integer	Bignum or Fixnum (as required)
sfixed64	Always eight bytes.	int64	long	int/long	int64	long	integer/string	Bignum
bool		bool	boolean	boolean	bool	bool	boolean	TrueClass/FalseClass
string	A string must always contain UTF-8 encoded or 7-bit ASCII text.	string	String	str/unicode	string	string	string	String (UTF-8)
bytes	May contain any arbitrary sequence of bytes.	string	ByteString	str	[]byte	ByteString	string	String (ASCII-8BIT)