README
¶
Filelog Receiver
Tails and parses logs from files using the opentelemetry-log-collection library.
Supported pipeline types: logs
🚧 This receiver is in alpha and configuration fields are subject to change.
Configuration
| Field | Default | Description |
|---|---|---|
include |
required | A list of file glob patterns that match the file paths to be read |
exclude |
[] | A list of file glob patterns to exclude from reading |
start_at |
end |
At startup, where to start reading logs from the file. Options are beginning or end |
multiline |
A multiline configuration block. See below for more details |
|
force_flush_period |
500ms |
Time since last read of data from file, after which currently buffered log should be send to pipeline. Takes duration as value. Zero means waiting for new data forever |
encoding |
utf-8 |
The encoding of the file being read. See the list of supported encodings below for available options |
include_file_name |
true |
Whether to add the file name as the label file_name |
include_file_path |
false |
Whether to add the file path as the label file_path |
poll_interval |
200ms | The duration between filesystem polls |
fingerprint_size |
1kb |
The number of bytes with which to identify a file. The first bytes in the file are used as the fingerprint. Decreasing this value at any point will cause existing fingerprints to forgotten, meaning that all files will be read from the beginning (one time) |
max_log_size |
1MiB |
The maximum size of a log entry to read before failing. Protects against reading large amounts of data into memory |
max_concurrent_files |
1024 | The maximum number of log files from which logs will be read concurrently. If the number of files matched in the include pattern exceeds this number, then files will be processed in batches. One batch will be processed per poll_interval |
attributes |
{} | A map of key: value pairs to add to the entry's attributes |
resource |
{} | A map of key: value pairs to add to the entry's resource |
operators |
[] | An array of operators. See below for more details |
converter |
{ |
A map of key: value pairs to configure the entry.Entry to plog.LogRecord converter, more info can be found here |
Note that by default, no logs will be read from a file that is not actively being written to because start_at defaults to end.
Operators
Each operator performs a simple responsibility, such as parsing a timestamp or JSON. Chain together operators to process logs into a desired format.
- Every operator has a
type. - Every operator can be given a unique
id. If you use the same type of operator more than once in a pipeline, you must specify anid. Otherwise, theiddefaults to the value oftype. - Operators will output to the next operator in the pipeline. The last operator in the pipeline will emit from the receiver. Optionally, the
outputparameter can be used to specify theidof another operator to which logs will be passed directly. - Only parsers and general purpose operators should be used.
Multiline configuration
If set, the multiline configuration block instructs the file_input operator to split log entries on a pattern other than newlines.
The multiline configuration block must contain exactly one of line_start_pattern or line_end_pattern. These are regex patterns that
match either the beginning of a new log entry, or the end of a log entry.
Supported encodings
| Key | Description |
|---|---|
nop |
No encoding validation. Treats the file as a stream of raw bytes |
utf-8 |
UTF-8 encoding |
utf-16le |
UTF-16 encoding with little-endian byte order |
utf-16be |
UTF-16 encoding with little-endian byte order |
ascii |
ASCII encoding |
big5 |
The Big5 Chinese character encoding |
Other less common encodings are supported on a best-effort basis. See https://www.iana.org/assignments/character-sets/character-sets.xhtml for other encodings available.
Additional Terminology and Features
- An entry is the base representation of log data as it moves through a pipeline. All operators either create, modify, or consume entries.
- A field is used to reference values in an entry.
- A common expression syntax is used in several operators. For example, expressions can be used to filter or route entries.
- timestamp parsing is available as a block within all parser operators, and also as a standalone operator. Many common timestamp layouts are supported.
- severity parsing is available as a block within all parser operators, and also as a standalone operator. Stanza uses a flexible severity representation which is automatically interpreted by the stanza receiver.
Example - Tailing a simple json file
Receiver Configuration
receivers:
filelog:
include: [ /var/log/myservice/*.json ]
operators:
- type: json_parser
timestamp:
parse_from: attributes.time
layout: '%Y-%m-%d %H:%M:%S'
Documentation
¶
Overview ¶
Package stanzareceiver implements a receiver that can be used by the Opentelemetry collector to receive logs using the stanza log agent
Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func NewFactory ¶
func NewFactory() component.ReceiverFactory
NewFactory creates a factory for filelog receiver
Types ¶
type FileLogConfig ¶
type FileLogConfig struct {
stanza.BaseConfig `mapstructure:",squash"`
Input stanza.InputConfig `mapstructure:",remain"`
}
FileLogConfig defines configuration for the filelog receiver
type ReceiverType ¶
type ReceiverType struct{}
ReceiverType implements stanza.LogReceiverType to create a file tailing receiver
func (ReceiverType) BaseConfig ¶
func (f ReceiverType) BaseConfig(cfg config.Receiver) stanza.BaseConfig
BaseConfig gets the base config from config, for now
func (ReceiverType) CreateDefaultConfig ¶
func (f ReceiverType) CreateDefaultConfig() config.Receiver
CreateDefaultConfig creates a config with type and version
func (ReceiverType) DecodeInputConfig ¶
DecodeInputConfig unmarshals the input operator
Source Files