Class: Google::Cloud::Logging::Project

Inherits:
Object
  • Object
show all
Defined in:
lib/google/cloud/logging/project.rb

Overview

Project

Projects are top-level containers in Google Cloud Platform. They store information about billing and authorized users, and they control access to Stackdriver Logging resources. Each project has a friendly name and a unique ID. Projects can be created only in the Google Developers Console. See Google::Cloud#logging.

See Google::Cloud#logging

Examples:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
entries = logging.entries

Instance Method Summary collapse

Instance Method Details

#async_writer(max_queue_size: AsyncWriter::DEFAULT_MAX_QUEUE_SIZE) ⇒ Object

Creates an object that batches and transmits log entries asynchronously.

Use this object to transmit log entries efficiently. It keeps a queue of log entries, and runs a background thread that transmits them to the logging service in batches. Generally, adding to the queue will not block.

This object is thread-safe; it may accept write requests from multiple threads simultaneously, and will serialize them when executing in the background thread.

Examples:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new

async = logging.async_writer

entry1 = logging.entry payload: "Job started."
entry2 = logging.entry payload: "Job completed."

labels = { job_size: "large", job_code: "red" }
resource = logging.resource "gae_app",
                            "module_id" => "1",
                            "version_id" => "20150925t173233"

async.write_entries [entry1, entry2],
                    log_name: "my_app_log",
                    resource: resource,
                    labels: labels

Parameters:

  • max_queue_size (Integer) —

    The maximum number of log entries that may be queued before write requests will begin to block. This provides back pressure in case the transmitting thread cannot keep up with requests.



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# File 'lib/google/cloud/logging/project.rb', line 309

def async_writer max_queue_size: AsyncWriter::DEFAULT_MAX_QUEUE_SIZE
  AsyncWriter.new self, max_queue_size
end

#create_metric(name, filter, description: nil) ⇒ Google::Cloud::Logging::Metric Also known as: new_metric

Creates a new logs-based metric for Google Cloud Monitoring.

Examples:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
metric = logging.create_metric "errors", "severity>=ERROR"

Parameters:

  • name (String) —

    The client-assigned metric identifier. Metric identifiers are limited to 1000 characters and can include only the following characters: A-Z, a-z, 0-9, and the special characters _-.,+!*',()%/\. The forward-slash character (/) denotes a hierarchy of name pieces, and it cannot be the first character of the name.

  • filter (String) —

    An advanced logs filter.

  • description (String, nil) —

    A description of this metric, which is used in documentation.

Returns:

See Also:



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# File 'lib/google/cloud/logging/project.rb', line 664

def create_metric name, filter, description: nil
  ensure_service!
  grpc = service.create_metric name, filter, description
  Metric.from_grpc grpc, service
end

#create_sink(name, destination, filter: nil, version: :unspecified) ⇒ Google::Cloud::Logging::Sink Also known as: new_sink

Creates a new project sink. When you create a sink, only new log entries that match the sink's filter are exported. Stackdriver Logging does not send previously-ingested log entries to the sink's destination.

Before creating the sink, ensure that you have granted cloud-logs@google.com permission to write logs to the destination. See Permissions for writing exported logs.

Examples:

require "google/cloud/storage"

storage = Google::Cloud::Storage.new

bucket = storage.create_bucket "my-logs-bucket"

# Grant owner permission to Stackdriver Logging service
email = "cloud-logs@google.com"
bucket.acl.add_owner "group-#{email}"

require "google/cloud/logging"

logging = Google::Cloud::Logging.new

sink = logging.create_sink "my-sink",
                           "storage.googleapis.com/#{bucket.id}"

Parameters:

  • name (String) —

    The client-assigned sink identifier. Sink identifiers are limited to 1000 characters and can include only the following characters: A-Z, a-z, 0-9, and the special characters _-..

  • destination (String) —

    The resource name of the export destination. See About sinks for examples.

  • filter (String, nil) —

    An advanced logs filter that defines the log entries to be exported. The filter must be consistent with the log entry format designed by the version parameter, regardless of the format of the log entry that was originally written to Stackdriver Logging.

  • version (Symbol) —

    The log entry version used when exporting log entries from this sink. This version does not have to correspond to the version of the log entry when it was written to Stackdriver Logging. Accepted values are :unspecified, :v2, and :v1. Version 2 is currently the preferred format. An unspecified version format currently defaults to V2 in the service. The default value is :unspecified.

Returns:

See Also:



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# File 'lib/google/cloud/logging/project.rb', line 564

def create_sink name, destination, filter: nil, version: :unspecified
  version = Sink.resolve_version version
  ensure_service!
  grpc = service.create_sink name, destination, filter, version
  Sink.from_grpc grpc, service
end

#delete_log(name) ⇒ Boolean

Deletes a log and all its log entries. The log will reappear if it receives new entries.

Examples:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
logging.delete_log "my_app_log"

Parameters:

  • name (String) —

    The name of the log, which may be the full path including the project ID (projects/<project-id>/logs/<log-id>), or just the short name (<log-id>), in which case the beginning of the path will be automatically prepended, using the ID of the current project.

Returns:

  • (Boolean) —

    Returns true if the log and all its log entries were deleted.



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# File 'lib/google/cloud/logging/project.rb', line 393

def delete_log name
  ensure_service!
  service.delete_log name
  true
end

#entries(projects: nil, filter: nil, order: nil, token: nil, max: nil) ⇒ Array<Google::Cloud::Logging::Entry> Also known as: find_entries

Lists log entries. Use this method to retrieve log entries from Cloud Logging.

Examples:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
entries = logging.entries
entries.each do |e|
  puts "[#{e.timestamp}] #{e.log_name} #{e.payload.inspect}"
end

You can use a filter to narrow results to a single log.

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
entries = logging.entries filter: "log:syslog"
entries.each do |e|
  puts "[#{e.timestamp}] #{e.payload.inspect}"
end

You can also order the results by timestamp.

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
entries = logging.entries order: "timestamp desc"
entries.each do |e|
  puts "[#{e.timestamp}] #{e.log_name} #{e.payload.inspect}"
end

Retrieve all log entries: (See Entry::List#all)

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
entries = logging.entries

entries.all do |e|
  puts "[#{e.timestamp}] #{e.log_name} #{e.payload.inspect}"
end

Parameters:

  • projects (String, Array) —

    One or more project IDs or project numbers from which to retrieve log entries. If nil, the ID of the receiving project instance will be used.

  • filter (String) —

    An advanced logs filter. The filter is compared against all log entries in the projects specified by projects. Only entries that match the filter are retrieved. An empty filter matches all log entries.

  • order (String) —

    How the results should be sorted. Presently, the only permitted values are "timestamp" (default) and "timestamp desc".

  • token (String) —

    A previously-returned page token representing part of the larger set of results to view.

  • max (Integer) —

    Maximum number of entries to return.

Returns:



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# File 'lib/google/cloud/logging/project.rb', line 146

def entries projects: nil, filter: nil, order: nil, token: nil, max: nil
  ensure_service!
  list_grpc = service.list_entries projects: projects, filter: filter,
                                   order: order, token: token, max: max
  Entry::List.from_grpc list_grpc, service,
                        projects: projects, max: max,
                        filter: filter, order: order
end

#entry(log_name: nil, resource: nil, timestamp: nil, severity: nil, insert_id: nil, labels: nil, payload: nil) ⇒ Google::Cloud::Logging::Entry Also known as: new_entry

Creates an new Entry instance that may be populated and written to the Stackdriver Logging service. The Entry#resource attribute is pre-populated with a new Resource instance. Equivalent to calling Google::Cloud::Logging::Entry.new.

Examples:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new

entry = logging.entry severity: :INFO, payload: "Job started."

logging.write_entries entry

Parameters:

  • log_name (String) —

    The resource name of the log to which this log entry belongs. See also Entry#log_name=.

  • resource (Resource) —

    The monitored resource associated with this log entry. See also Entry#resource.

  • timestamp (Time) —

    The time the event described by the log entry occurred. If omitted, Stackdriver Logging will use the time the log entry is written. See also Entry#timestamp.

  • severity (Symbol) —

    The severity level of the log entry. The default value is DEFAULT. See also Entry#severity.

  • insert_id (String) —

    A unique ID for the log entry. If you provide this field, the logging service considers other log entries in the same log with the same ID as duplicates which can be removed. If omitted, Stackdriver Logging will generate a unique ID for this log entry. See also Entry#insert_id.

  • labels (Hash{Symbol,String => String}) —

    A hash of user-defined key:value pairs that provide additional information about the log entry. See also Entry#labels=.

  • payload (String, Hash) —

    The log entry payload, represented as either a string, a hash (JSON), or a hash (protocol buffer). See also Entry#payload.

Returns:



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# File 'lib/google/cloud/logging/project.rb', line 194

def entry log_name: nil, resource: nil, timestamp: nil, severity: nil,
          insert_id: nil, labels: nil, payload: nil
  e = Entry.new
  e.log_name = log_name if log_name
  e.resource = resource if resource
  e.timestamp = timestamp if timestamp
  e.severity = severity if severity
  e.insert_id = insert_id if insert_id
  e.labels = labels if labels
  e.payload = payload if payload
  e
end

#logger(log_name, resource, labels = {}) ⇒ Google::Cloud::Logging::Logger

Creates a logger instance that is API-compatible with Ruby's standard library Logger.

The logger will create a new AsyncWriter object to transmit log entries on a background thread.

Examples:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new

resource = logging.resource "gae_app",
                            module_id: "1",
                            version_id: "20150925t173233"

logger = logging.logger "my_app_log", resource, env: :production
logger.info "Job started."

Parameters:

  • log_name (String) —

    A log resource name to be associated with the written log entries.

  • resource (Google::Cloud::Logging::Resource) —

    The monitored resource to be associated with written log entries.

  • labels (Hash) (defaults to: {}) —

    A set of user-defined data to be associated with written log entries.

Returns:



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# File 'lib/google/cloud/logging/project.rb', line 370

def logger log_name, resource, labels = {}
  Logger.new shared_async_writer, log_name, resource, labels
end

#metric(name) ⇒ Google::Cloud::Logging::Metric? Also known as: get_metric, find_metric

Retrieves metric by name.

Examples:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
metric = logging.metric "existing_metric"

By default nil will be returned if metric does not exist.

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
metric = logging.metric "non_existing_metric" #=> nil

Parameters:

  • name (String) —

    Name of a metric.

Returns:



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# File 'lib/google/cloud/logging/project.rb', line 691

def metric name
  ensure_service!
  grpc = service.get_metric name
  Metric.from_grpc grpc, service
rescue Google::Cloud::NotFoundError
  nil
end

#metrics(token: nil, max: nil) ⇒ Array<Google::Cloud::Logging::Metric> Also known as: find_metrics

Retrieves the list of metrics belonging to the project.

Examples:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
metrics = logging.metrics
metrics.each do |m|
  puts "#{m.name}: #{m.filter}"
end

Retrieve all metrics: (See Metric::List#all)

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
metrics = logging.metrics

metrics.all do |m|
  puts "#{m.name}: #{m.filter}"
end

Parameters:

  • token (String) —

    A previously-returned page token representing part of the larger set of results to view.

  • max (Integer) —

    Maximum number of metrics to return.

Returns:



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# File 'lib/google/cloud/logging/project.rb', line 631

def metrics token: nil, max: nil
  ensure_service!
  grpc = service.list_metrics token: token, max: max
  Metric::List.from_grpc grpc, service, max
end

#project ⇒ String

The ID of the current project.

Examples:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new(
  project: "my-project",
  keyfile: "/path/to/keyfile.json"
)

logging.project #=> "my-project"

Returns:

  • (String) —

    the Google Cloud project ID



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# File 'lib/google/cloud/logging/project.rb', line 74

def project
  service.project
end

#resource(type, labels = {}) ⇒ Google::Cloud::Logging::Resource Also known as: new_resource

Creates a new monitored resource instance.

Examples:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new

resource = logging.resource "gae_app",
                            "module_id" => "1",
                            "version_id" => "20150925t173233"

Parameters:

  • type (String) —

    The type of resource, as represented by a ResourceDescriptor.

  • labels (Hash) (defaults to: {}) —

    A set of labels that can be used to describe instances of this monitored resource type.

Returns:



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# File 'lib/google/cloud/logging/project.rb', line 459

def resource type, labels = {}
  Resource.new.tap do |r|
    r.type = type
    r.labels = labels
  end
end

#resource_descriptors(token: nil, max: nil) ⇒ Array<Google::Cloud::Logging::ResourceDescriptor> Also known as: find_resource_descriptors

Retrieves the list of monitored resource descriptors that are used by Stackdriver Logging.

Examples:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
resource_descriptors = logging.resource_descriptors
resource_descriptors.each do |rd|
  label_keys = rd.labels.map(&:key).join(", ")
  puts "#{rd.type} (#{label_keys})"
end

Pagination:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
resource_descriptors = logging.resource_descriptors

resource_descriptors.all do |rd|
  puts rd.type
end

Parameters:

  • token (String) —

    A previously-returned page token representing part of the larger set of results to view.

  • max (Integer) —

    Maximum number of resource descriptors to return.

Returns:

See Also:



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# File 'lib/google/cloud/logging/project.rb', line 433

def resource_descriptors token: nil, max: nil
  ensure_service!
  list_grpc = service.list_resource_descriptors token: token, max: max
  ResourceDescriptor::List.from_grpc list_grpc, service, max
end

#shared_async_writer ⇒ Object

Returns a shared AsyncWriter for this Project. If this method is called multiple times, it will return the same object.

Examples:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new

async = logging.shared_async_writer

entry1 = logging.entry payload: "Job started."
entry2 = logging.entry payload: "Job completed."

labels = { job_size: "large", job_code: "red" }
resource = logging.resource "gae_app",
                            "module_id" => "1",
                            "version_id" => "20150925t173233"

async.write_entries [entry1, entry2],
                    log_name: "my_app_log",
                    resource: resource,
                    labels: labels


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# File 'lib/google/cloud/logging/project.rb', line 337

def shared_async_writer
  @shared_async_writer ||= async_writer
end

#sink(sink_name) ⇒ Google::Cloud::Logging::Sink? Also known as: get_sink, find_sink

Retrieves a sink by name.

Examples:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
sink = logging.sink "existing-sink"

By default nil will be returned if the sink does not exist.

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
sink = logging.sink "non-existing-sink" #=> nil

Parameters:

  • sink_name (String) —

    Name of a sink.

Returns:



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# File 'lib/google/cloud/logging/project.rb', line 592

def sink sink_name
  ensure_service!
  grpc = service.get_sink sink_name
  Sink.from_grpc grpc, service
rescue Google::Cloud::NotFoundError
  nil
end

#sinks(token: nil, max: nil) ⇒ Array<Google::Cloud::Logging::Sink> Also known as: find_sinks

Retrieves the list of sinks belonging to the project.

Examples:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
sinks = logging.sinks
sinks.each do |s|
  puts "#{s.name}: #{s.filter} -> #{s.destination}"
end

Retrieve all sinks: (See Sink::List#all)

require "google/cloud/logging"

logging = Google::Cloud::Logging.new
sinks = logging.sinks

sinks.all do |s|
  puts "#{s.name}: #{s.filter} -> #{s.destination}"
end

Parameters:

  • token (String) —

    A previously-returned page token representing part of the larger set of results to view.

  • max (Integer) —

    Maximum number of sinks to return.

Returns:



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# File 'lib/google/cloud/logging/project.rb', line 496

def sinks token: nil, max: nil
  ensure_service!
  list_grpc = service.list_sinks token: token, max: max
  Sink::List.from_grpc list_grpc, service, max
end

#write_entries(entries, log_name: nil, resource: nil, labels: nil) ⇒ Boolean

Writes log entries to the Stackdriver Logging service.

If you write a collection of log entries, you can provide the log name, resource, and/or labels hash to be used for all of the entries, and omit these values from the individual entries.

Examples:

require "google/cloud/logging"

logging = Google::Cloud::Logging.new

entry = logging.entry payload: "Job started.",
                      log_name: "my_app_log"
entry.resource.type = "gae_app"
entry.resource.labels[:module_id] = "1"
entry.resource.labels[:version_id] = "20150925t173233"

logging.write_entries entry

Optionally pass log name, resource, and labels for entries.

require "google/cloud/logging"

logging = Google::Cloud::Logging.new

entry1 = logging.entry payload: "Job started."
entry2 = logging.entry payload: "Job completed."

labels = { job_size: "large", job_code: "red" }
resource = logging.resource "gae_app",
                            "module_id" => "1",
                            "version_id" => "20150925t173233"

logging.write_entries [entry1, entry2],
                      log_name: "my_app_log",
                      resource: resource,
                      labels: labels

Parameters:

  • entries (Google::Cloud::Logging::Entry, Array<Google::Cloud::Logging::Entry>) —

    One or more entry objects to write. The log entries must have values for all required fields.

  • log_name (String) —

    A default log ID for those log entries in entries that do not specify their own log_name. See also Entry#log_name=.

  • resource (Resource) —

    A default monitored resource for those log entries in entries that do not specify their own resource. See also Entry#resource.

  • labels (Hash{Symbol,String => String}) —

    User-defined key:value items that are added to the labels field of each log entry in entries, except when a log entry specifies its own key:value item with the same key. See also Entry#labels=.

Returns:

  • (Boolean) —

    Returns true if the entries were written.



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# File 'lib/google/cloud/logging/project.rb', line 263

def write_entries entries, log_name: nil, resource: nil, labels: nil
  ensure_service!
  service.write_entries Array(entries).map(&:to_grpc),
                        log_name: log_name, resource: resource,
                        labels: labels
  true
end