haproxy: T7081: Support HTTP compression

[Embezzle]

Change summary

Add support for HTTP compression in HAProxy responses.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

https://vyos.dev/T7081

Related PR(s)

How to test / Smoketest result

Test Steps

1. Configure haproxy using the new options:

set load-balancing haproxy service fe-01 listen-address '127.0.0.1'
set load-balancing haproxy service fe-01 port '80'
set load-balancing haproxy service fe-01 mode 'http'
set load-balancing haproxy service fe-01 http-compression algorithm 'gzip'
set load-balancing haproxy service fe-01 http-compression mime-type 'text/html'
set load-balancing haproxy service fe-01 http-compression mime-type 'text/css'
set load-balancing haproxy service fe-01 backend 'bk-01'

set load-balancing haproxy backend bk-01 mode 'http'
set load-balancing haproxy backend bk-01 server srv-01 address '127.0.0.1'
set load-balancing haproxy backend bk-01 server srv-01 port '8080'

2. Check haproxy.cfg is showing the correct configuration:

vyos@vyos:~$ cat /var/run/haproxy/haproxy.cfg | grep -A 2 'filter compression'
filter compression
compression algo gzip
compression type text/html text/css

Smoke Test

vyos@vyos:~$ python3 /usr/libexec/vyos/tests/smoke/cli/test_load-balancing_haproxy.py
test_01_lb_reverse_proxy_domain (__main__.TestLoadBalancingReverseProxy.test_01_lb_reverse_proxy_domain) ... ok
test_02_lb_reverse_proxy_cert_not_exists (__main__.TestLoadBalancingReverseProxy.test_02_lb_reverse_proxy_cert_not_exists) ... ok
test_03_lb_reverse_proxy_ca_not_exists (__main__.TestLoadBalancingReverseProxy.test_03_lb_reverse_proxy_ca_not_exists) ... ok
test_04_lb_reverse_proxy_backend_ssl_no_verify (__main__.TestLoadBalancingReverseProxy.test_04_lb_reverse_proxy_backend_ssl_no_verify) ... ok
test_05_lb_reverse_proxy_backend_http_check (__main__.TestLoadBalancingReverseProxy.test_05_lb_reverse_proxy_backend_http_check) ... ok
test_06_lb_reverse_proxy_tcp_mode (__main__.TestLoadBalancingReverseProxy.test_06_lb_reverse_proxy_tcp_mode) ... ok
test_07_lb_reverse_proxy_http_response_headers (__main__.TestLoadBalancingReverseProxy.test_07_lb_reverse_proxy_http_response_headers) ... ok
test_08_lb_reverse_proxy_tcp_health_checks (__main__.TestLoadBalancingReverseProxy.test_08_lb_reverse_proxy_tcp_health_checks) ... ok
test_09_lb_reverse_proxy_logging (__main__.TestLoadBalancingReverseProxy.test_09_lb_reverse_proxy_logging) ... ok
test_10_lb_reverse_proxy_http_compression (__main__.TestLoadBalancingReverseProxy.test_10_lb_reverse_proxy_http_compression) ... ok

----------------------------------------------------------------------
Ran 10 tests in 53.303s

OK

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• I have run the components SMOKETESTS if applicable
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly

[github-actions]

👍
No issues in PR Title / Commit Title

[github-actions]

CI integration 👍 passed!

Details

CI logs

• CLI Smoketests (no interfaces) 👍 passed
• CLI Smoketests (interfaces only) 👍 passed
• Config tests 👍 passed
• RAID1 tests 👍 passed
• TPM tests 👍 passed