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Get attributes from envoy config. #87

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Merged
chowchow316 merged 4 commits into from
Feb 14, 2017
Merged

Get attributes from envoy config. #87

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cbcaee1
get-attributes-from-conf
chowchow316 Feb 13, 2017
3d4fda1
Send all attributes.
chowchow316 Feb 13, 2017
0acfab6
Remove unused const strings.
chowchow316 Feb 13, 2017
94f55a7
Address comment.
chowchow316 Feb 13, 2017
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13 changes: 4 additions & 9 deletions src/envoy/mixer/http_control.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -134,19 +134,14 @@ void FillRequestInfoAttributes(const AccessLog::RequestInfo& info,

} // namespace

HttpControl::HttpControl(const std::string& mixer_server) {
HttpControl::HttpControl(const std::string& mixer_server,
const std::map<std::string, std::string>& attributes) {
::istio::mixer_client::MixerClientOptions options;
options.mixer_server = mixer_server;
mixer_client_ = ::istio::mixer_client::CreateMixerClient(options);

auto source_service = getenv(kEnvNameSourceService.c_str());
if (source_service) {
source_service_ = source_service;
}
auto target_service = getenv(kEnvNameTargetService.c_str());
if (target_service) {
target_service_ = target_service;
}
source_service_ = attributes.at(kAttrNameTargetService);

@qiwzhang qiwzhang Feb 13, 2017

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keep the map in the class member.

// the attributes read from the config file.
std::map<std::string, std::string>& config_attributes_;

In the Check() call, set all of them to the attributes data structure.

target_service_ = attributes.at(kAttrNameSourceService);
}

void HttpControl::FillCheckAttributes(const HeaderMap& header_map,
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3 changes: 2 additions & 1 deletion src/envoy/mixer/http_control.h
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Expand Up @@ -37,7 +37,8 @@ typedef std::shared_ptr<HttpRequestData> HttpRequestDataPtr;
class HttpControl final : public Logger::Loggable<Logger::Id::http> {
public:
// The constructor.
HttpControl(const std::string& mixer_server);
HttpControl(const std::string& mixer_server,
const std::map<std::string, std::string>& attributes);

@qiwzhang qiwzhang Feb 13, 2017

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use

std::map<std::string, std::string>&& attributes

call it by std::move()

to reduce a copy


// Make mixer check call.
void Check(HttpRequestDataPtr request_data, HeaderMap& headers,
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11 changes: 10 additions & 1 deletion src/envoy/mixer/http_filter.cc
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Expand Up @@ -96,7 +96,16 @@ class Config : public Logger::Loggable<Logger::Id::http> {
__func__);
}

http_control_ = std::make_shared<HttpControl>(mixer_server);
std::map<std::string, std::string> attributes;
if (config.hasObject("attributes")) {
for (const std::string& attr : config.getStringArray("attributes")) {
attributes[attr] = config.getString(attr);
}
} else {
log().warn("No attributes is specified in the config: {}", __func__);

@qiwzhang qiwzhang Feb 13, 2017

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Not need to log a warn, just remove the whole else {}.

@kyessenov kyessenov Feb 13, 2017

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This needs to be extended to include upstream_cluster. @rshriram did something similar for the fault injection filter. Basically, the problem is that if you have two upstream clusters "service_a" and "service_b" in the same http connection manager (say via weighted cluster block), you need to send two different sets of attributes about "a" and "b". Maybe make "attributes" a list of JSON objects that have "upstream_cluster" and "attributes" list.

You do not have to do this in the same PR, but send a follow-up PR that allows this customization.

@kyessenov kyessenov Feb 13, 2017

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I'm also OK with restricting mixer attributes to be same for all service versions. The drawback is that we cannot do gradual config change for the mixer attributes. The whole idea of service versions is that we can customize what set of attributes to send for a subset of the service destination pods.

@qiwzhang qiwzhang Feb 13, 2017

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Open https://github.com/istio/proxy/issues/88 for first issue. Did not quite understand the second issue yet. Will open a separate issue once I understand it.

}

http_control_ = std::make_shared<HttpControl>(mixer_server, attributes);
log().debug("Called Mixer::Config contructor with mixer_server: ",
mixer_server);
}
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