*Host operating system: output of **uname -a*

Linux EUWBOMON01 4.18.0-147.8.1.el8_1.x86_64 #1 
<https://github.com/prometheus/blackbox_exporter/pull/1> SMP Thu Apr 9 
13:49:54 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

*blackbox_exporter version: output of **blackbox_exporter --version*

blackbox_exporter, version 0.17.0 (branch: HEAD, revision: 1bc7680 
<https://github.com/prometheus/blackbox_exporter/commit/1bc768014cf6815f7e9d694e0292e77dd10f3235>
)
build user: root
build date: 20200619-11:54:41
go version: go1.14.4

*What is the blackbox.yml module config.*

modules:
http_2xx:
prober: http
timeout: 25s
http:
valid_http_versions: ["HTTP/1.0", "HTTP/1.1", "HTTP/2.0"]
valid_status_codes: []
preferred_ip_protocol: ip4
tls_config:
insecure_skip_verify: true
http_post_2xx:
prober: http
timeout: 5s
http:
method: POST
preferred_ip_protocol: ip4
tcp_connect:
prober: tcp
timeout: 5s
tcp:
preferred_ip_protocol: ip4
icmp:
prober: icmp
timeout: 5s
icmp:
preferred_ip_protocol: ip4
http_2xx_home:
prober: http
timeout: 5s
http:
method: GET

fail_if_body_not_matches_regexp:

- "OK"

fail_if_not_ssl: true

  preferred_ip_protocol: ip4

http_2xx_tls:
prober: http
timeout: 25s
http:
valid_http_versions: ["HTTP/1.0", "HTTP/1.1", "HTTP/2.0"]
valid_status_codes: []
preferred_ip_protocol: ip4

*What is the prometheus.yml scrape config.*

   - job_name: 'blackbox-Product_Template'
   scrape_interval: 30s
   metrics_path: /probe
   params:
   module: [http_2xx]
   file_sd_configs:
   - files: ['./blackboxtargets/blackbox_product_template_targets.yml']
   relabel_configs:
   - source_labels: [*address*]
   target_label: __param_target
   - source_labels: [__param_target]
   target_label: instance
   - target_label: *address*
   replacement: Blackbox_server_IP 

*What logging output did you get from adding **&debug=true** to the probe 
URL?*

Logs for the probe:
ts=2021-01-07T13:29:02.789489148Z caller=main.go:304 module=http_2xx target=
https://www2.trustnet.com level=info msg="Beginning probe" probe=http 
timeout_seconds=25
ts=2021-01-07T13:29:02.789667447Z caller=http.go:323 module=http_2xx target=
https://www2.trustnet.com level=info msg="Resolving target address" 
ip_protocol=ip4
ts=2021-01-07T13:29:02.804001657Z caller=http.go:323 module=http_2xx target=
https://www2.trustnet.com level=info msg="Resolved target address" 
ip=104.18.186.229
ts=2021-01-07T13:29:02.804057257Z caller=client.go:252 module=http_2xx 
target=https://www2.trustnet.com level=info msg="Making HTTP request" url=
https://104.18.186.229 host=www2.trustnet.com
ts=2021-01-07T13:29:02.930748562Z caller=main.go:119 module=http_2xx target=
https://www2.trustnet.com level=info msg="Received HTTP response" 
status_code=502
ts=2021-01-07T13:29:02.930772962Z caller=main.go:119 module=http_2xx target=
https://www2.trustnet.com level=info msg="Invalid HTTP response status 
code, wanted 2xx" status_code=502
ts=2021-01-07T13:29:02.930826762Z caller=main.go:119 module=http_2xx target=
https://www2.trustnet.com level=info msg="Response timings for roundtrip" 
roundtrip=0 start=2021-01-07T13:29:02.804120156Z 
dnsDone=2021-01-07T13:29:02.804120156Z 
connectDone=2021-01-07T13:29:02.806239843Z 
gotConn=2021-01-07T13:29:02.815712583Z 
responseStart=2021-01-07T13:29:02.930606663Z 
end=2021-01-07T13:29:02.930792862Z
ts=2021-01-07T13:29:02.930893061Z caller=main.go:304 module=http_2xx target=
https://www2.trustnet.com level=error msg="Probe failed" 
duration_seconds=0.141338714

Metrics that would have been returned:

HELP probe_dns_lookup_time_seconds Returns the time taken for probe dns 
lookup in seconds

TYPE probe_dns_lookup_time_seconds gauge

probe_dns_lookup_time_seconds 0.01433891

HELP probe_duration_seconds Returns how long the probe took to complete in 
seconds

TYPE probe_duration_seconds gauge

probe_duration_seconds 0.141338714

HELP probe_failed_due_to_regex Indicates if probe failed due to regex

TYPE probe_failed_due_to_regex gauge

probe_failed_due_to_regex 0

HELP probe_http_content_length Length of http content response

TYPE probe_http_content_length gauge

probe_http_content_length 1477

HELP probe_http_duration_seconds Duration of http request by phase, summed 
over all redirects

TYPE probe_http_duration_seconds gauge

probe_http_duration_seconds{phase="connect"} 0.002119787
probe_http_duration_seconds{phase="processing"} 0.11489408
probe_http_duration_seconds{phase="resolve"} 0.01433891
probe_http_duration_seconds{phase="tls"} 0.011592527
probe_http_duration_seconds{phase="transfer"} 0.000186199

HELP probe_http_redirects The number of redirects

TYPE probe_http_redirects gauge

probe_http_redirects 0

HELP probe_http_ssl Indicates if SSL was used for the final redirect

TYPE probe_http_ssl gauge

probe_http_ssl 1

HELP probe_http_status_code Response HTTP status code

TYPE probe_http_status_code gauge

probe_http_status_code 502

HELP probe_http_uncompressed_body_length Length of uncompressed response 
body

TYPE probe_http_uncompressed_body_length gauge

probe_http_uncompressed_body_length 1477

HELP probe_http_version Returns the version of HTTP of the probe response

TYPE probe_http_version gauge

probe_http_version 2

HELP probe_ip_addr_hash Specifies the hash of IP address. It's useful to 
detect if the IP address changes.

TYPE probe_ip_addr_hash gauge

probe_ip_addr_hash 3.641314862e+09

HELP probe_ip_protocol Specifies whether probe ip protocol is IP4 or IP6

TYPE probe_ip_protocol gauge

probe_ip_protocol 4

HELP probe_ssl_earliest_cert_expiry Returns earliest SSL cert expiry in 
unixtime

TYPE probe_ssl_earliest_cert_expiry gauge

probe_ssl_earliest_cert_expiry 1.6131312e+09

HELP probe_ssl_last_chain_expiry_timestamp_seconds Returns last SSL chain 
expiry in timestamp seconds

TYPE probe_ssl_last_chain_expiry_timestamp_seconds gauge

probe_ssl_last_chain_expiry_timestamp_seconds -6.21355968e+10

HELP probe_success Displays whether or not the probe was a success

TYPE probe_success gauge

probe_success 0

HELP probe_tls_version_info Contains the TLS version used

TYPE probe_tls_version_info gauge

probe_tls_version_info{version="TLS 1.3"} 1

Module configuration:
prober: http
timeout: 25s
http:
valid_http_versions:
- HTTP/1.0
- HTTP/1.1
- HTTP/2.0
preferred_ip_protocol: ip4
ip_protocol_fallback: true
tls_config:
insecure_skip_verify: true
tcp:
ip_protocol_fallback: true
icmp:
ip_protocol_fallback: true
dns:
ip_protocol_fallback: true

*What did you expect to see?*

Expect to see result of 200
We have looked into the page inspection and App Insights and both are 
returning the correct 200 value.

*What did you see instead?*

Getting an incorrect result of 502

 

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