Semantic Conventions for Redis

Status: Experimental

The Semantic Conventions for Redis extend and override the Database Semantic Conventions.

db.system MUST be set to "redis" and SHOULD be provided at span creation time.

Attributes

Attribute	Type	Description	Examples	Requirement Level	Stability
db.namespace	string	The index of the database being accessed as used in the SELECT command (captured as a string). [1]	0; 1; 15	Conditionally Required If and only if it can be captured reliably.
db.operation.name	string	The name of the operation or command being executed. [2]	findAndModify; HMSET; SELECT	Conditionally Required [3]
error.type	string	Describes a class of error the operation ended with. [4]	timeout; java.net.UnknownHostException; server_certificate_invalid; 500	Conditionally Required If and only if the operation failed.
server.port	int	Server port number. [5]	80; 8080; 443	Conditionally Required [6]
db.query.text	string	The full syntax of the Redis CLI command. [7]	HMSET myhash field1 'Hello' field2 'World'	Recommended [8]
network.peer.address	string	Peer address of the database node where the operation was performed. [9]	10.1.2.80; /tmp/my.sock	Recommended
network.peer.port	int	Peer port number of the network connection.	65123	Recommended if and only if network.peer.address is set.
server.address	string	Name of the database host. [10]	example.com; 10.1.2.80; /tmp/my.sock	Recommended
db.query.parameter.<key>	string	A query parameter used in db.query.text, with <key> being the parameter name, and the attribute value being a string representation of the parameter value. [11]	someval; 55	Opt-In

[1]: The database index for current connection can be changed by the application dynamically. Instrumentations MAY use the initial database index provided in the connection string and keep track of the currently selected database to capture the db.namespace. Instrumentations SHOULD NOT set this attribute if capturing it would require additional network calls to Redis. For commands that switch the database, this SHOULD be set to the target database (even if the command fails).

[2]: It is RECOMMENDED to capture the value as provided by the application without attempting to do any case normalization. If the operation name is parsed from the query text, it SHOULD be the first operation name found in the query. For batch operations, if the individual operations are known to have the same operation name then that operation name SHOULD be used prepended by BATCH , otherwise db.operation.name SHOULD be BATCH or some other database system specific term if more applicable.

[3]: If readily available. The operation name MAY be parsed from the query text, in which case it SHOULD be the first operation name found in the query.

[4]: The error.type SHOULD match the error code returned by the database or the client library, the canonical name of exception that occurred, or another low-cardinality error identifier. Instrumentations SHOULD document the list of errors they report.

[5]: When observed from the client side, and when communicating through an intermediary, server.port SHOULD represent the server port behind any intermediaries, for example proxies, if it’s available.

[6]: If using a port other than the default port for this DBMS and if server.address is set.

[7]: For Redis, the value provided for db.query.text SHOULD correspond to the syntax of the Redis CLI. If, for example, the HMSET command is invoked, "HMSET myhash field1 'Hello' field2 'World'" would be a suitable value for db.query.text.

[8]: Non-parameterized query text SHOULD NOT be collected by default unless there is sanitization that excludes sensitive data, e.g. by redacting all literal values present in the query text. Parameterized query text SHOULD be collected by default (the query parameter values themselves are opt-in, see db.query.parameter.<key>).

[9]: If a database operation involved multiple network calls (for example retries), the address of the last contacted node SHOULD be used.

[10]: When observed from the client side, and when communicating through an intermediary, server.address SHOULD represent the server address behind any intermediaries, for example proxies, if it’s available.

[11]: Query parameters should only be captured when db.query.text is parameterized with placeholders. If a parameter has no name and instead is referenced only by index, then <key> SHOULD be the 0-based index.

The following attributes can be important for making sampling decisions and SHOULD be provided at span creation time (if provided at all):

• db.namespace
• db.operation.name
• db.query.text
• server.address
• server.port

error.type has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

Value	Description	Stability
_OTHER	A fallback error value to be used when the instrumentation doesn’t define a custom value.

Example

In this example, Redis is connected using a unix domain socket and therefore the connection string is left out.