fix(chain): Fixed telemetry data sending to HTTPS endpoint (#2329)

We already have a record of breaking Telemetry once in a while not even noticing this fact till much later, thus I decided not only to fix it, but also put some logging there.

## Test Plan

* Manually checked that the fix works (openssl is statically linked and
system root CA certificates still get detected and used)
* Added "info" logger to report Telemetry issues (I choose "info" level
to indicate that it is not critical, and node can operate just fine
with that when the message appears in the logs; it is expected to be silent most of the time)

chain/telemetry/Cargo.toml

@@ -6,9 +6,11 @@ edition = "2018"
 
 [dependencies]
 openssl = { version = "0.10", features = ["vendored"] }
+openssl-probe = "0.1.2"
 actix-web = { version = "2.0.0", features = [ "openssl" ] }
 futures = "0.3"
 actix = "0.9.0"
 serde = "1.0"
 serde_derive = "1.0"
 serde_json = "1.0"
+tracing = "0.1"

chain/telemetry/src/lib.rs

@@ -4,6 +4,7 @@ use actix::{Actor, Addr, Context, Handler, Message};
 use actix_web::client::{Client, Connector};
 use futures::FutureExt;
 use serde_derive::{Deserialize, Serialize};
+use tracing::info;
 
 /// Timeout for establishing connection.
 const CONNECT_TIMEOUT: Duration = Duration::from_secs(10);
@@ -33,6 +34,7 @@ impl Default for TelemetryActor {
 
 impl TelemetryActor {
     pub fn new(config: TelemetryConfig) -> Self {
+        openssl_probe::init_ssl_cert_env_vars();
         let client = Client::build()
             .timeout(CONNECT_TIMEOUT)
             .connector(
@@ -60,7 +62,11 @@ impl Handler<TelemetryEvent> for TelemetryActor {
                     .post(endpoint)
                     .header("Content-Type", "application/json")
                     .send_json(&msg.content)
-                    .map(drop),
+                    .map(|response| {
+                        if let Err(error) = response {
+                            info!(target: "telemetry", "Telemetry data could not be sent due to: {}", error);
+                        }
+                    }),
             );
         }
     }

near/src/main.rs

@@ -18,7 +18,7 @@ use near::{get_default_home, get_store_path, init_configs, load_config, start_wi
 use near_primitives::types::Version;
 
 fn init_logging(verbose: Option<&str>) {
-    let mut env_filter = EnvFilter::new("tokio_reactor=info,near=info,stats=info");
+    let mut env_filter = EnvFilter::new("tokio_reactor=info,near=info,stats=info,telemetry=info");
 
     if let Some(module) = verbose {
         env_filter = env_filter