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How do you configure EnvoyProxy with a default (catch-all) route for traffic?

no_longer_in_sudoers_file
Atlassian Team
Atlassian Team members are employees working across the company in a wide variety of roles.
July 10, 2018

See https://www.envoyproxy.io/docs/envoy/latest/api-v2/api/v2/route/route.proto#envoy-api-msg-route-routematch

 

Assuming you want to have one 'catch-all' or default route in your Envoy Proxy, how do you configure Envoy?  The docs are a bit sparse on exactly what you could do here.

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no_longer_in_sudoers_file
Atlassian Team
Atlassian Team members are employees working across the company in a wide variety of roles.
July 10, 2018

Let's assume you have two virtual machines on your dev laptop: serviceProxy and proxyTarget.

You can use the following envoy.conf to achieve the goal.

 

# serviceProxy: 192.168.127.10:{10000,9901}
# proxyTarget: 192.168.127.11:80
#
admin:
access_log_path: /tmp/admin_access.log
address:
socket_address: { address: 0.0.0.0, port_value: 9901 }

static_resources:
listeners:
- name: catch_all_proxy_rule
address:
socket_address: { address: 0.0.0.0, port_value: 10000 }
filter_chains:
- filters:
- name: envoy.http_connection_manager
config:
stat_prefix: ingress_proxyTarget
route_config:
name: default_route
virtual_hosts:
- name: default_vhost
domains: ["*"]
routes:
- match: { prefix: "" }
# route: { host_rewrite: proxyTarget.local, cluster: proxyTarget }
route: { cluster: proxyTarget }
http_filters:
- name: envoy.router
clusters:
- name: proxyTarget
connect_timeout: 0.12s
type: LOGICAL_DNS
# Comment out the following line to test on v6 networks
dns_lookup_family: V4_ONLY
lb_policy: ROUND_ROBIN
hosts: [{ socket_address: { address: 192.168.127.11, port_value: 80 }}]

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