Protocol Documentation

Table of Contents

• peer/peer.proto

  • ChangeNotification

  • NotifyRequest

  • TLS

  • ChangeNotificationType

  • Peer

• Scalar Value Types

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peer/peer.proto

ChangeNotification

ChangeNotification indicates a change regarding a hubble peer.

Field	Type	Label	Description
name	string		Name is the name of the peer, typically the hostname. The name includes the cluster name if a value other than default has been specified. This value can be used to uniquely identify the host. When the cluster name is not the default, the cluster name is prepended to the peer name and a forward slash is added.

Examples: - runtime1 - testcluster/runtime1 | | address | string | | Address is the address of the peer’s gRPC service. | | type | ChangeNotificationType | | ChangeNotificationType indicates the type of change, ie whether the peer was added, deleted or updated. | | tls | TLS | | TLS provides information to connect to the Address with TLS enabled. If not set, TLS shall be assumed to be disabled. |

NotifyRequest

TLS

TLS provides information to establish a TLS connection to the peer.

Field	Type	Label	Description
server_name	string		ServerName is used to verify the hostname on the returned certificate.

ChangeNotificationType

ChangeNotificationType defines the peer change notification type.

Name	Number	Description
UNKNOWN	0
PEER_ADDED	1
PEER_DELETED	2
PEER_UPDATED	3

Peer

Peer lists hubble peers and notifies of changes.

Method Name	Request Type	Response Type	Description
Notify	NotifyRequest	ChangeNotification stream	Notify sends information about hubble peers in the cluster. When Notify is called, it sends information about all the peers that are already part of the cluster (with the type as PEER_ADDED). It subsequently notifies of any change.

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)