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envoy_conf.go
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/
envoy_conf.go
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// Copyright 2017 Istio Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package env
import (
"fmt"
"os"
"strings"
"text/template"
"github.com/gogo/protobuf/jsonpb"
"github.com/gogo/protobuf/proto"
)
const envoyConfTemplYAML = `
admin:
access_log_path: {{.AccessLogPath}}
address:
socket_address:
address: 127.0.0.1
port_value: {{.Ports.AdminPort}}
static_resources:
clusters:
- name: backend
connect_timeout: 5s
type: STATIC
hosts:
- socket_address:
address: 127.0.0.1
port_value: {{.Ports.BackendPort}}
- name: loop
connect_timeout: 5s
type: STATIC
hosts:
- socket_address:
address: 127.0.0.1
port_value: {{.Ports.ServerProxyPort}}
- name: mixer_server
http2_protocol_options: {}
connect_timeout: 5s
type: STATIC
hosts:
- socket_address:
address: 127.0.0.1
port_value: {{.Ports.MixerPort}}
circuit_breakers:
thresholds:
- max_connections: 10000
max_pending_requests: 10000
max_requests: 10000
max_retries: 3
listeners:
- name: server
address:
socket_address:
address: 127.0.0.1
port_value: {{.Ports.ServerProxyPort}}
filter_chains:
- filters:
- name: envoy.http_connection_manager
config:
codec_type: AUTO
stat_prefix: inbound_http
access_log:
- name: envoy.file_access_log
config:
path: {{.AccessLogPath}}
http_filters:
{{.FiltersBeforeMixer | indent 10 }}
- name: mixer
config: {{.MfConfig.HTTPServerConf | toJSON }}
- name: envoy.router
route_config:
name: backend
virtual_hosts:
- name: backend
domains: ["*"]
routes:
- match:
prefix: /
route:
cluster: backend
timeout: 0s
per_filter_config:
mixer: {{.MfConfig.PerRouteConf | toJSON }}
- name: client
address:
socket_address:
address: 127.0.0.1
port_value: {{.Ports.ClientProxyPort}}
filter_chains:
- filters:
- name: envoy.http_connection_manager
config:
codec_type: AUTO
stat_prefix: outbound_http
access_log:
- name: envoy.file_access_log
config:
path: {{.AccessLogPath}}
http_filters:
- name: mixer
config: {{.MfConfig.HTTPClientConf | toJSON }}
- name: envoy.router
route_config:
name: loop
virtual_hosts:
- name: loop
domains: ["*"]
routes:
- match:
prefix: /
route:
cluster: loop
timeout: 0s
- name: tcp_server
address:
socket_address:
address: 127.0.0.1
port_value: {{.Ports.TCPProxyPort}}
filter_chains:
- filters:
- name: mixer
config: {{.MfConfig.TCPServerConf | toJSON }}
- name: envoy.tcp_proxy
config:
stat_prefix: inbound_tcp
cluster: backend
`
// CreateEnvoyConf create envoy config.
func (s *TestSetup) CreateEnvoyConf(path string) error {
if s.stress {
s.AccessLogPath = "/dev/null"
}
confTmpl := envoyConfTemplYAML
if s.EnvoyTemplate != "" {
confTmpl = s.EnvoyTemplate
}
tmpl, err := template.New("test").Funcs(template.FuncMap{
"toJSON": toJSON,
"indent": indent,
}).Parse(confTmpl)
if err != nil {
return fmt.Errorf("failed to parse config template: %v", err)
}
tmpl.Funcs(template.FuncMap{})
f, err := os.Create(path)
if err != nil {
return fmt.Errorf("failed to create file %v: %v", path, err)
}
defer func() {
_ = f.Close()
}()
return tmpl.Execute(f, s)
}
func toJSON(mixerFilterConfig proto.Message) string {
m := jsonpb.Marshaler{OrigName: true}
str, err := m.MarshalToString(mixerFilterConfig)
if err != nil {
return ""
}
return str
}
func indent(n int, s string) string {
pad := strings.Repeat(" ", n)
return pad + strings.Replace(s, "\n", "\n"+pad, -1)
}