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Logging

  • how-to
    +
    Setting log levels.

    Logging

    The Couchbase Ruby SDK has no hard dependency on a specific logger implementation. By default it uses built-in means to report events. The default log level is warning.

    The following log levels are supported (in order of increasing amount of information logged):

    1. off

    2. critical

    3. error

    4. warning

    5. info

    6. debug

    7. trace

    The Ruby SDK is configured to send logs to standard output. The logging level can be changed using the environment variable COUCHBASE_BACKEND_LOG_LEVEL.

    require 'couchbase'
cluster = Couchbase::Cluster.connect('couchbase://localhost', 'Administrator', 'password')
cluster.bucket('travel-sample')
       .scope('inventory')
       .collection('airport')
       .upsert('foo', { 'bar' => 42 })

    …​when executed like this:

    $ COUCHBASE_BACKEND_LOG_LEVEL=debug ruby script.rb
    [2020-09-07 14:30:26.311] [186383,186383] [info] 0ms, couchbase backend has been initialized: {:sdk=>"3.0.0.snapshot", :backend=>"0.5.0", :build_timestamp=>"2020-09-07 11:24:46", :revision=>"fa3ce49b6b142e2c2e6d03ab16d33b37da3f8c55", :platform=>"Linux-5.7.10-201.fc32.x86_64", :cpu=>"x86_64", :cc=>"GNU 10.2.1", :cxx=>"GNU 10.2.1", :ruby=>"2.7.0", :spdlog=>"1.6.0", :asio=>"1.16.1", :snappy=>"1.1.8", :http_parser=>"2.9.4", :openssl_headers=>"OpenSSL 1.1.1g FIPS  21 Apr 2020", :openssl_runtime=>"OpenSSL 1.1.1g FIPS  21 Apr 2020"}
[2020-09-07 14:30:26.358] [186383,186390] [warning] 47ms, DNS SRV query returned 0 records for "localhost", assuming that cluster is listening this address
[2020-09-07 14:30:26.358] [186383,186390] [debug] 0ms, [plain/8447ccca-720c-4fd0-c49f-359487f4fbab/d5a8f89d-8c9c-4253-f390-754ff8cdaeeb/-] <localhost:11210> attempt to establish MCBP connection
[2020-09-07 14:30:26.359] [186383,186390] [debug] 0ms, [plain/8447ccca-720c-4fd0-c49f-359487f4fbab/d5a8f89d-8c9c-4253-f390-754ff8cdaeeb/-] <localhost:11210> connecting to ::1:11210
[2020-09-07 14:30:26.360] [186383,186390] [debug] 0ms, [plain/8447ccca-720c-4fd0-c49f-359487f4fbab/d5a8f89d-8c9c-4253-f390-754ff8cdaeeb/-] <localhost:11210> connected to ::1:11210
[2020-09-07 14:30:26.360] [186383,186390] [debug] 0ms, [plain/8447ccca-720c-4fd0-c49f-359487f4fbab/d5a8f89d-8c9c-4253-f390-754ff8cdaeeb/-] <localhost/::1:11210> user_agent={"a":"ruby/0.5.0/fa3ce49b6b142e2c2e6d03ab16d33b37da3f8c55","i":"8447ccca-720c-4fd0-c49f-359487f4fbab/d5a8f89d-8c9c-4253-f390-754ff8cdaeeb"}, requested_features=[tcp_nodelay, mutation_seqno, xattr, xerror, select_bucket, snappy, json, duplex, clustermap_change_notification, unordered_execution, alt_request_support, tracing, sync_replication, vattr, collections]
[2020-09-07 14:30:26.361] [186383,186390] [debug] 1ms, [plain/8447ccca-720c-4fd0-c49f-359487f4fbab/d5a8f89d-8c9c-4253-f390-754ff8cdaeeb/-] <localhost/::1:11210> supported_features=[tcp_nodelay, mutation_seqno, xattr, xerror, select_bucket, snappy, json, duplex, clustermap_change_notification, unordered_execution, tracing, alt_request_support, sync_replication, collections, vattr]
[2020-09-07 14:30:26.372] [186383,186390] [debug] 10ms, [plain/8447ccca-720c-4fd0-c49f-359487f4fbab/d5a8f89d-8c9c-4253-f390-754ff8cdaeeb/-] <localhost/::1:11210> received new configuration: #<config:fd801dc8-1b1c-4790-a6de-0830a705bede rev=35, nodes(1)=[#<node:0 hostname="localhost", plain=(kv=11210, mgmt=8091, cbas=8095, fts=8094, n1ql=8093, capi=8092), tls=(kv=11207, mgmt=18091, cbas=18095, fts=18094, n1ql=18093, capi=18092), alt=[]>]>
[2020-09-07 14:30:26.372] [186383,186390] [info] 0ms, [plain/8447ccca-720c-4fd0-c49f-359487f4fbab/d5a8f89d-8c9c-4253-f390-754ff8cdaeeb/-] <localhost/::1:11210> detected network is "default"
[2020-09-07 14:30:26.372] [186383,186383] [debug] 0ms, [plain/8447ccca-720c-4fd0-c49f-359487f4fbab/9c6f61d7-b2f7-42c8-d507-b3af3fa3fe6c/default] <localhost:11210> attempt to establish MCBP connection
[2020-09-07 14:30:26.372] [186383,186390] [debug] 0ms, [plain/8447ccca-720c-4fd0-c49f-359487f4fbab/9c6f61d7-b2f7-42c8-d507-b3af3fa3fe6c/default] <localhost:11210> connecting to ::1:11210
[2020-09-07 14:30:26.372] [186383,186390] [debug] 0ms, [plain/8447ccca-720c-4fd0-c49f-359487f4fbab/9c6f61d7-b2f7-42c8-d507-b3af3fa3fe6c/default] <localhost:11210> connected to ::1:11210
[2020-09-07 14:30:26.372] [186383,186390] [debug] 0ms, [plain/8447ccca-720c-4fd0-c49f-359487f4fbab/9c6f61d7-b2f7-42c8-d507-b3af3fa3fe6c/default] <localhost/::1:11210> user_agent={"a":"ruby/0.5.0/fa3ce49b6b142e2c2e6d03ab16d33b37da3f8c55","i":"8447ccca-720c-4fd0-c49f-359487f4fbab/9c6f61d7-b2f7-42c8-d507-b3af3fa3fe6c"}, requested_features=[tcp_nodelay, mutation_seqno, xattr, xerror, select_bucket, snappy, json, duplex, clustermap_change_notification, unordered_execution, alt_request_support, tracing, sync_replication, vattr, collections]
[2020-09-07 14:30:26.373] [186383,186390] [debug] 0ms, [plain/8447ccca-720c-4fd0-c49f-359487f4fbab/9c6f61d7-b2f7-42c8-d507-b3af3fa3fe6c/default] <localhost/::1:11210> supported_features=[tcp_nodelay, mutation_seqno, xattr, xerror, select_bucket, snappy, json, duplex, clustermap_change_notification, unordered_execution, tracing, alt_request_support, sync_replication, collections, vattr]
[2020-09-07 14:30:26.377] [186383,186390] [debug] 3ms, [plain/8447ccca-720c-4fd0-c49f-359487f4fbab/9c6f61d7-b2f7-42c8-d507-b3af3fa3fe6c/default] <localhost/::1:11210> selected bucket: default
[2020-09-07 14:30:26.377] [186383,186390] [debug] 0ms, [plain/8447ccca-720c-4fd0-c49f-359487f4fbab/9c6f61d7-b2f7-42c8-d507-b3af3fa3fe6c/default] <localhost/::1:11210> received new configuration: #<config:e5a3bdf4-179c-4f80-7c49-1f121de9f3a7 rev=35, uuid=4772d383f8170ac18f3878a6a9b97c90, bucket=default, replicas=0, partitions=1024, nodes(1)=[#<node:0 hostname="localhost", plain=(kv=11210, mgmt=8091, cbas=8095, fts=8094, n1ql=8093, capi=8092), tls=(kv=11207, mgmt=18091, cbas=18095, fts=18094, n1ql=18093, capi=18092), alt=[]>]>
[2020-09-07 14:30:26.377] [186383,186390] [debug] 0ms, [8447ccca-720c-4fd0-c49f-359487f4fbab/default] initialize configuration rev=35
[2020-09-07 14:30:26.377] [186383,186390] [debug] 0ms, [8447ccca-720c-4fd0-c49f-359487f4fbab/default] rev=35, preserve session="9c6f61d7-b2f7-42c8-d507-b3af3fa3fe6c", address="localhost:11210"
[2020-09-07 14:30:26.378] [186383,186390] [debug] 0ms, [plain/8447ccca-720c-4fd0-c49f-359487f4fbab/d5a8f89d-8c9c-4253-f390-754ff8cdaeeb/-] <localhost/::1:11210> stop MCBP connection, reason=do_not_retry
[2020-09-07 14:30:26.378] [186383,186390] [debug] 0ms, [plain/8447ccca-720c-4fd0-c49f-359487f4fbab/9c6f61d7-b2f7-42c8-d507-b3af3fa3fe6c/default] <localhost/::1:11210> stop MCBP connection, reason=do_not_retry