Struct zebrad::components::tracing::Config
source · pub struct Config {
pub use_color: bool,
pub force_use_color: bool,
pub filter: Option<String>,
pub buffer_limit: usize,
pub endpoint_addr: Option<SocketAddr>,
pub flamegraph: Option<PathBuf>,
pub log_file: Option<PathBuf>,
pub use_journald: bool,
}
Expand description
Tracing configuration section.
Fields§
§use_color: bool
Whether to use colored terminal output, if available.
Colored terminal output is automatically disabled if an output stream is connected to a file. (Or another non-terminal device.)
Defaults to true
, which automatically enables colored output to
terminals.
force_use_color: bool
Whether to force the use of colored terminal output, even if it’s not available.
Will force Zebra to use colored terminal output even if it does not detect that the output is a terminal that supports colors.
Defaults to false
, which keeps the behavior of use_color
.
filter: Option<String>
The filter used for tracing events.
The filter is used to create a tracing-subscriber
EnvFilter
,
and more details on the syntax can be found there or in the examples
below.
If no filter is specified (None
), the filter is set to info
if the
-v
flag is given and warn
if it is not given.
Examples
warn,zebrad=info,zebra_network=debug
sets a global warn
level, an
info
level for the zebrad
crate, and a debug
level for the
zebra_network
crate.
[block_verify{height=Some\(block::Height\(.*000\)\)}]=trace
sets trace
level for all events occurring in the context of a
block_verify
span whose height
field ends in 000
, i.e., traces the
verification of every 1000th block.
buffer_limit: usize
The buffer_limit size sets the number of log lines that can be queued by the tracing subscriber to be written to stdout before logs are dropped.
Defaults to 128,000 with a minimum of 100.
endpoint_addr: Option<SocketAddr>
The address used for an ad-hoc RPC endpoint allowing dynamic control of the tracing filter.
Install Zebra using cargo install --features=filter-reload
to enable this config.
If this is set to None, the endpoint is disabled.
flamegraph: Option<PathBuf>
Controls whether to write a flamegraph of tracing spans.
Install Zebra using cargo install --features=flamegraph
to enable this config.
If this is set to None, flamegraphs are disabled. Otherwise, it specifies an output file path, as described below.
This path is not used verbatim when writing out the flamegraph. This is because the flamegraph is written out as two parts. First the flamegraph is constantly persisted to the disk in a “folded” representation that records collapsed stack traces of the tracing spans that are active. Then, when the application is finished running the destructor will flush the flamegraph output to the folded file and then read that file and generate the final flamegraph from it as an SVG.
The need to create two files means that we will slightly manipulate the path given to us to create the two representations.
Security
If you are running Zebra with elevated permissions (“root”), create the directory for this file before running Zebra, and make sure the Zebra user account has exclusive access to that directory, and other users can’t modify its parent directories.
Example
Given flamegraph = "flamegraph"
we will generate a flamegraph.svg
and
a flamegraph.folded
file in the current directory.
If you provide a path with an extension the extension will be ignored and
replaced with .folded
and .svg
for the respective files.
log_file: Option<PathBuf>
If set to a path, write the tracing logs to that path.
By default, logs are sent to the terminal standard output.
But if the progress-bar
feature is activated, logs are sent to the standard log file path:
- Linux:
$XDG_STATE_HOME/zebrad.log
or$HOME/.local/state/zebrad.log
- macOS:
$HOME/Library/Application Support/zebrad.log
- Windows:
%LOCALAPPDATA%\zebrad.log
orC:\Users\%USERNAME%\AppData\Local\zebrad.log
Security
If you are running Zebra with elevated permissions (“root”), create the directory for this file before running Zebra, and make sure the Zebra user account has exclusive access to that directory, and other users can’t modify its parent directories.
use_journald: bool
The use_journald flag sends tracing events to systemd-journald, on Linux distributions that use systemd.
Install Zebra using cargo install --features=journald
to enable this config.
Implementations§
source§impl Config
impl Config
sourcepub fn use_color_stdout(&self) -> bool
pub fn use_color_stdout(&self) -> bool
Returns true
if standard output should use color escapes.
Automatically checks if Zebra is running in a terminal.
sourcepub fn use_color_stderr(&self) -> bool
pub fn use_color_stderr(&self) -> bool
Returns true
if standard error should use color escapes.
Automatically checks if Zebra is running in a terminal.
sourcepub fn use_color_stdout_and_stderr(&self) -> bool
pub fn use_color_stdout_and_stderr(&self) -> bool
Returns true
if output that could go to standard output or standard error
should use color escapes. Automatically checks if Zebra is running in a terminal.
Trait Implementations§
source§impl<'de> Deserialize<'de> for Configwhere
Config: Default,
impl<'de> Deserialize<'de> for Configwhere Config: Default,
source§fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where __D: Deserializer<'de>,
Auto Trait Implementations§
impl RefUnwindSafe for Config
impl Send for Config
impl Sync for Config
impl Unpin for Config
impl UnwindSafe for Config
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