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Ashvitha f95ffe0355 Allow HCP metrics collection for Envoy proxies ... Co-authored-by: Ashvitha Sridharan <ashvitha.sridharan@hashicorp.com> Co-authored-by: Freddy <freddygv@users.noreply.github.com> Add a new envoy flag: "envoy_hcp_metrics_bind_socket_dir", a directory where a unix socket will be created with the name `<namespace>_<proxy_id>.sock` to forward Envoy metrics. If set, this will configure: - In bootstrap configuration a local stats_sink and static cluster. These will forward metrics to a loopback listener sent over xDS. - A dynamic listener listening at the socket path that the previously defined static cluster is sending metrics to. - A dynamic cluster that will forward traffic received at this listener to the hcp-metrics-collector service. Reasons for having a static cluster pointing at a dynamic listener: - We want to secure the metrics stream using TLS, but the stats sink can only be defined in bootstrap config. With dynamic listeners/clusters we can use the proxy's leaf certificate issued by the Connect CA, which isn't available at bootstrap time. - We want to intelligently route to the HCP collector. Configuring its addreess at bootstrap time limits our flexibility routing-wise. More on this below. Reasons for defining the collector as an upstream in `proxycfg`: - The HCP collector will be deployed as a mesh service. - Certificate management is taken care of, as mentioned above. - Service discovery and routing logic is automatically taken care of, meaning that no code changes are required in the xds package. - Custom routing rules can be added for the collector using discovery chain config entries. Initially the collector is expected to be deployed to each admin partition, but in the future could be deployed centrally in the default partition. These config entries could even be managed by HCP itself.		2 years ago
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pipe-bootstrap	envoy: improve comments	4 years ago
testdata	Allow HCP metrics collection for Envoy proxies	2 years ago
bootstrap_config.go	Allow HCP metrics collection for Envoy proxies	2 years ago
bootstrap_config_test.go	Allow HCP metrics collection for Envoy proxies	2 years ago
bootstrap_tpl.go	Allow HCP metrics collection for Envoy proxies	2 years ago
envoy.go	Follow-up fixes to consul connect envoy command (#16530)	2 years ago
envoy_oss_test.go	re-run gofmt on 1.17 (#11579)	3 years ago
envoy_test.go	Allow HCP metrics collection for Envoy proxies	2 years ago
exec.go	Enhancement: Consul Compatibility Checking (#15818)	2 years ago
exec_test.go	Enhancement: Consul Compatibility Checking (#15818)	2 years ago
exec_unix.go	re-run gofmt on 1.17 (#11579)	3 years ago
exec_unsupported.go	re-run gofmt on 1.17 (#11579)	3 years ago
flags.go	connect: switch the default gateway port from 443 to 8443 (#9116)	4 years ago
flags_test.go	connect: switch the default gateway port from 443 to 8443 (#9116)	4 years ago