Ssh Configuration !!HOT!!

The term is very common in computer science and mathematics, and in scientific and technological fields in general. Thus, for example, two scientists won a 1962 Nobel Prize for their description of the configuration of the DNA molecule. Since then, researchers have studied what different configurations within the DNA strands mean and what they control, and genetic engineers have tried to configure or reconfigure DNA in new ways to prevent or treat diseases.

Prometheus is configured via command-line flags and a configuration file. Whilethe command-line flags configure immutable system parameters (such as storagelocations, amount of data to keep on disk and in memory, etc.), theconfiguration file defines everything related to scraping jobs and theirinstances, as well aswhich rule files to load.

Ssh Configuration

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Prometheus can reload its configuration at runtime. If the new configurationis not well-formed, the changes will not be applied.A configuration reload is triggered by sending a SIGHUP to the Prometheus process orsending a HTTP POST request to the /-/reload endpoint (when the --web.enable-lifecycle flag is enabled).This will also reload any configured rule files.

A scrape_config section specifies a set of targets and parameters describing howto scrape them. In the general case, one scrape configuration specifies a singlejob. In advanced configurations, this may change.

DigitalOcean SD configurations allow retrieving scrape targets from DigitalOcean'sDroplets API.This service discovery uses the public IPv4 address by default, by that can bechanged with relabeling, as demonstrated in the Prometheus digitalocean-sdconfiguration file.

The services role discovers all Swarm servicesand exposes their ports as targets. For each published port of a service, asingle target is generated. If a service has no published ports, a target perservice is created using the port parameter defined in the SD configuration.

The tasks role discovers all Swarm tasksand exposes their ports as targets. For each published port of a task, a singletarget is generated. If a task has no published ports, a target per task iscreated using the port parameter defined in the SD configuration.

A DNS-based service discovery configuration allows specifying a set of DNSdomain names which are periodically queried to discover a list of targets. TheDNS servers to be contacted are read from /etc/resolv.conf.

OVHcloud SD configurations allow retrieving scrape targets from OVHcloud's dedicated servers and VPS usingtheir API.Prometheus will periodically check the REST endpoint and create a target for every discovered server.The role will try to use the public IPv4 address as default address, if there's none it will try to use the IPv6 one. This may be changed with relabeling.For OVHcloud's public cloud instances you can use the openstacksdconfig.

Hetzner SD configurations allow retrieving scrape targets fromHetzner Cloud API andRobot API.This service discovery uses the public IPv4 address by default, but that can bechanged with relabeling, as demonstrated in the Prometheus hetzner-sdconfiguration file.

IONOS SD configurations allows retrieving scrape targets fromIONOS Cloud API. This service discovery uses thefirst NICs IP address by default, but that can be changed with relabeling. Thefollowing meta labels are available on all targets duringrelabeling:

Linode SD configurations allow retrieving scrape targets from Linode'sLinode APIv4.This service discovery uses the public IPv4 address by default, by that can bechanged with relabeling, as demonstrated in the Prometheus linode-sdconfiguration file.

Marathon SD configurations allow retrieving scrape targets using theMarathon REST API. Prometheuswill periodically check the REST endpoint for currently running tasks andcreate a target group for every app that has at least one healthy task.

By default every app listed in Marathon will be scraped by Prometheus. If not allof your services provide Prometheus metrics, you can use a Marathon label andPrometheus relabeling to control which instances will actually be scraped.See the Prometheus marathon-sd configuration filefor a practical example on how to set up your Marathon app and your Prometheusconfiguration.

Relabeling is a powerful tool to dynamically rewrite the label set of a target beforeit gets scraped. Multiple relabeling steps can be configured per scrape configuration.They are applied to the label set of each target in order of their appearancein the configuration file.

Initially, aside from the configured per-target labels, a target's joblabel is set to the job_name value of the respective scrape configuration.The __address__ label is set to the : address of the target.After relabeling, the instance label is set to the value of __address__ by default ifit was not set during relabeling. The __scheme__ and __metrics_path__ labelsare set to the scheme and metrics path of the target respectively. The __param_label is set to the value of the first passed URL parameter called .

Metric relabeling is applied to samples as the last step before ingestion. Ithas the same configuration format and actions as target relabeling. Metricrelabeling does not apply to automatically generated timeseries such as up.

1) In computers and computer networks, a configuration often refers to the specific hardware and software details in terms of devices attached, capacity or capability, and exactly what the system is made up of.

Application configuration in ASP.NET Core is performed using one or more configuration providers. Configuration providers read configuration data from key-value pairs using a variety of configuration sources:

ASP.NET Core apps configure and launch a host. The host is responsible for app startup and lifetime management. The ASP.NET Core templates create a WebApplicationBuilder which contains the host. While some configuration can be done in both the host and the application configuration providers, generally, only configuration that is necessary for the host should be done in host configuration.

WebApplication.CreateBuilder initializes a new instance of the WebApplicationBuilder class with preconfigured defaults. The initialized WebApplicationBuilder (builder) provides default configuration for the app in the following order, from highest to lowest priority:

URLS is one of the many common host settings that is not a bootstrap setting. Like every other host setting not in the previous list, URLS is read later from application config. Host config is a fallback for application config, so host config can be used to set URLS, but it will be overridden by any configuration source in application config like appsettings.json.

The preceding list of highest to lowest priority default configuration sources shows the providers in the opposite order they are added to template generated application. For example, the JSON configuration provider is added before the Command-line configuration provider.

Configuration providers that are added later have higher priority and override previous key settings. For example, if MyKey is set in both appsettings.json and the environment, the environment value is used. Using the default configuration providers, the Command-line configuration provider overrides all other providers.

Using the default configuration, the appsettings.json and appsettings.{Environment}.json files are enabled with reloadOnChange: true. Changes made to the appsettings.json and appsettings.{Environment}.json file after the app starts are read by the JSON configuration provider.

An alternative approach when using the options pattern is to bind the Position section and add it to the dependency injection service container. In the following code, PositionOptions is added to the service container with Configure and bound to configuration:

By default, the user secrets configuration source is registered after the JSON configuration sources. Therefore, user secrets keys take precedence over keys in appsettings.json and appsettings.{Environment}.json.

Using the default configuration, the EnvironmentVariablesConfigurationProvider loads configuration from environment variable key-value pairs after reading appsettings.json, appsettings.{Environment}.json, and user secrets. Therefore, key values read from the environment override values read from appsettings.json, appsettings.{Environment}.json, and user secrets.

The default configuration loads environment variables and command line arguments prefixed with DOTNET_ and ASPNETCORE_. The DOTNET_ and ASPNETCORE_ prefixes are used by ASP.NET Core for host and app configuration, but not for user configuration. For more information on host and app configuration, see .NET Generic Host.

Environment variables set in launchSettings.json override those set in the system environment. For example, the ASP.NET Core web templates generate a launchSettings.json file that sets the endpoint configuration to:

When the switch mappings dictionary is used, the dictionary is checked for a key that matches the key provided by a command-line argument. If the command-line key is found in the dictionary, the dictionary value is passed back to set the key-value pair into the app's configuration. A switch mapping is required for any command-line key prefixed with a single dash (-).

Configuration sources are read in the order that their configuration providers are specified. Order configuration providers in code to suit the priorities for the underlying configuration sources that the app requires.

The Configuration API has special processing rules for four connection string environment variables. These connection strings are involved in configuring Azure connection strings for the app environment. Environment variables with the prefixes shown in the table are loaded into the app with the default configuration or when no prefix is supplied to AddEnvironmentVariables. e24fc04721