mesosphere
Cannot pass single backslash
I want to pass a single backslash for a haproxy configuration directive
http-response add-header Docker-Distribution-Api-Version:\ registry/2.0
The right label should be
"HAPROXY_0_HTTPS_FRONTEND_ACL": " http-response add-header Docker-Distribution-Api-Version:\\ registry/2.0 if {{ ssl_fc_sni {hostname} }}\n use_backend {backend} if {{ ssl_fc_sni {hostname} }}\n"
The backslash is escaped by another backslash, it should work, but fails.
The following works for MLB.
"HAPROXY_0_HTTPS_FRONTEND_ACL": " http-response add-header Docker-Distribution-Api-Version:\\\\ registry/2.0 if {{ ssl_fc_sni {hostname} }}\n use_backend {backend} if {{ ssl_fc_sni {hostname} }}\n"
but not for haproxy, because of the extra backslash in the generated configuration
http-response add-header Docker-Distribution-Api-Version:\\ registry/2.0
Workaround (unofficial):
"HAPROXY_0_HTTPS_FRONTEND_ACL": " http-response add-header Docker-Distribution-Api-Version:\\u005C registry/2.0 if {{ ssl_fc_sni {hostname} }}\n use_backend {backend} if {{ ssl_fc_sni {hostname} }}\n"
