WAN Config profile should use system defaults for DNS configuration
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Jared Casey July 21, 2023 at 11:08 PM
Updated WAN config profile to use system defaults for DNS configure if not specified.
Jared Casey June 9, 2023 at 5:59 PMEdited
Adding https://couchbasecloud.atlassian.net/browse/CXXCBC-333#icft=CXXCBC-333 changes gives us more insight in the logging which nameserver has been chosen. See before and after changes to show that w/ the WAN config profile we now default to the system config nameserver and port.
Before:
CBPPLOGLEVEL=trace node test.js
[2023-06-09 13:07:27.094] [13098,2831343] [debug] 18ms, Selected nameserver: "10.100.189.12" from "/etc/resolv.conf"
[2023-06-09 13:07:27.096] [13098,2831343] [debug] 1ms, open cluster, id: "23564f-4200-2944-e7a1-fdcce73afd795b", core version: "1.0.0-dp.6+4.f8a429f", {"bootstrap_nodes":[{"hostname":"cb.gxprauxvcewmas.cloud.couchbase.com","port":"11207"}],"options":{"analytics_timeout":"75000ms","bootstrap_timeout":"120000ms","config_idle_redial_timeout":"300000ms","config_poll_floor":"50ms","config_poll_interval":"2500ms","connect_timeout":"20000ms","disable_mozilla_ca_certificates":false,"dns_config":{"nameserver":"8.8.8.8","port":53,"timeout":"20000ms"},"dump_configuration":false,"enable_clustermap_notification":false,"enable_compression":true,"enable_dns_srv":true,"enable_metrics":true,"enable_mutation_tokens":true,"enable_tcp_keep_alive":true,"enable_tls":true,"enable_tracing":true,"enable_unordered_execution":true,"idle_http_connection_timeout":"4500ms","key_value_durable_timeout":"10000ms","key_value_timeout":"2500ms","management_timeout":"75000ms","max_http_connections":0,"metrics_options":{"emit_interval":"600000ms"},"network":"auto","query_timeout":"75000ms","resolve_timeout":"20000ms","search_timeout":"75000ms","show_queries":false,"tcp_keep_alive_interval":"60000ms","tls_verify":"peer","tracing_options":{"analytics_threshold":"1000ms","key_value_threshold":"500ms","management_threshold":"1000ms","orphaned_emit_interval":"10000ms","orphaned_sample_size":64,"query_threshold":"1000ms","search_threshold":"1000ms","threshold_emit_interval":"10000ms","threshold_sample_size":64,"view_threshold":"1000ms"},"transactions_options":{"cleanup_config":{"cleanup_client_attempts":false,"cleanup_lost_attempts":false,"cleanup_window":"0ms","collections":[]},"durability_level":"none","expiration_time":"0ns","query_config":{"scan_consistency":"not_bounded"}},"trust_certificate":"","use_ip_protocol":"any","user_agent_extra":"couchnode/4.2.5-dev (node/16.17.0; v8/9.4.146.26-node.22; ssl/1.1.1q+quic)","view_timeout":"75000ms"}}
[2023-06-09 13:07:27.096] [13098,2831352] [debug] 0ms, Query DNS-SRV: address="cb.gxprauxvcewmas.cloud.couchbase.com", service="_couchbases", nameserver="8.8.8.8:53"
[2023-06-09 13:07:27.097] [13098,2831352] [trace] 0ms, Query DNS-SRV (UDP) address="8.8.8.8:53", udp_timeout=10000ms, total_timeout=20000ms
0000: 00 00 01 00 00 01 00 00 00 00 00 00 0b 5f 63 6f 75 63 68 62 61 73 65 73 04 5f 74 63 70 02 63 62 ............._couchbases._tcp.cb
0020: 0e 67 78 70 72 61 75 78 76 63 65 77 6d 61 73 05 63 6c 6f 75 64 09 63 6f 75 63 68 62 61 73 65 03 .gxprauxvcewmas.cloud.couchbase.
0040: 63 6f 6d 00 00 21 00 01 com..!..
[2023-06-09 13:07:27.161] [13098,2831352] [debug] 63ms, DNS UDP returned 3 records
[2023-06-09 13:07:27.161] [13098,2831352] [info] 0ms, replace list of bootstrap nodes with addresses from DNS SRV of "cb.gxprauxvcewmas.cloud.couchbase.com": ["svc-dqis-node-001.gxprauxvcewmas.cloud.couchbase.com:11207", "svc-dqis-node-002.gxprauxvcewmas.cloud.couchbase.com:11207", "svc-dqis-node-003.gxprauxvcewmas.cloud.couchbase.com:11207"]After:
CBPPLOGLEVEL=trace node test.js
[2023-06-09 13:11:14.720] [13556,2833928] [debug] 18ms, Selected nameserver: "10.100.189.12" from "/etc/resolv.conf"
[2023-06-09 13:11:14.722] [13556,2833928] [debug] 1ms, open cluster, id: "0e865f-2c8c-fe40-6825-c6836f0060a246", core version: "1.0.0-dp.6+4.f8a429f", {"bootstrap_nodes":[{"hostname":"cb.gxprauxvcewmas.cloud.couchbase.com","port":"11207"}],"options":{"analytics_timeout":"75000ms","bootstrap_timeout":"120000ms","config_idle_redial_timeout":"300000ms","config_poll_floor":"50ms","config_poll_interval":"2500ms","connect_timeout":"20000ms","disable_mozilla_ca_certificates":false,"dns_config":{"nameserver":"10.100.189.12","port":53,"timeout":"20000ms"},"dump_configuration":false,"enable_clustermap_notification":false,"enable_compression":true,"enable_dns_srv":true,"enable_metrics":true,"enable_mutation_tokens":true,"enable_tcp_keep_alive":true,"enable_tls":true,"enable_tracing":true,"enable_unordered_execution":true,"idle_http_connection_timeout":"4500ms","key_value_durable_timeout":"10000ms","key_value_timeout":"2500ms","management_timeout":"75000ms","max_http_connections":0,"metrics_options":{"emit_interval":"600000ms"},"network":"auto","query_timeout":"75000ms","resolve_timeout":"20000ms","search_timeout":"75000ms","show_queries":false,"tcp_keep_alive_interval":"60000ms","tls_verify":"peer","tracing_options":{"analytics_threshold":"1000ms","key_value_threshold":"500ms","management_threshold":"1000ms","orphaned_emit_interval":"10000ms","orphaned_sample_size":64,"query_threshold":"1000ms","search_threshold":"1000ms","threshold_emit_interval":"10000ms","threshold_sample_size":64,"view_threshold":"1000ms"},"transactions_options":{"cleanup_config":{"cleanup_client_attempts":false,"cleanup_lost_attempts":false,"cleanup_window":"0ms","collections":[]},"durability_level":"none","expiration_time":"0ns","query_config":{"scan_consistency":"not_bounded"}},"trust_certificate":"","use_ip_protocol":"any","user_agent_extra":"couchnode/4.2.5-dev (node/16.17.0; v8/9.4.146.26-node.22; ssl/1.1.1q+quic)","view_timeout":"75000ms"}}
[2023-06-09 13:11:14.722] [13556,2833937] [debug] 0ms, Query DNS-SRV: address="cb.gxprauxvcewmas.cloud.couchbase.com", service="_couchbases", nameserver="10.100.189.12:53"
[2023-06-09 13:11:14.722] [13556,2833937] [trace] 0ms, Query DNS-SRV (UDP) address="10.100.189.12:53", udp_timeout=10000ms, total_timeout=20000ms
0000: 00 00 01 00 00 01 00 00 00 00 00 00 0b 5f 63 6f 75 63 68 62 61 73 65 73 04 5f 74 63 70 02 63 62 ............._couchbases._tcp.cb
0020: 0e 67 78 70 72 61 75 78 76 63 65 77 6d 61 73 05 63 6c 6f 75 64 09 63 6f 75 63 68 62 61 73 65 03 .gxprauxvcewmas.cloud.couchbase.
0040: 63 6f 6d 00 00 21 00 01 com..!..
[2023-06-09 13:11:14.793] [13556,2833937] [debug] 70ms, DNS UDP returned 3 records
[2023-06-09 13:11:14.793] [13556,2833937] [info] 0ms, replace list of bootstrap nodes with addresses from DNS SRV of "cb.gxprauxvcewmas.cloud.couchbase.com": ["svc-dqis-node-001.gxprauxvcewmas.cloud.couchbase.com:11207", "svc-dqis-node-002.gxprauxvcewmas.cloud.couchbase.com:11207", "svc-dqis-node-003.gxprauxvcewmas.cloud.couchbase.com:11207"]Fixed
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Jared Casey
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Created June 9, 2023 at 5:01 PM
Updated September 5, 2024 at 2:29 PM
Resolved July 21, 2023 at 11:08 PM
Instabug
When using the WAN config profile we want to set the dns_srv_timeout to be 20 seconds and leave the nameserver and port at defaults. However, the defaults we want are the system config defaults and not the "fallback" defaults the C++ client provides. We should update how the Node.js SDK sets the nameserver and port defaults.