outlier: tooling for success rate ejection by junr03 · Pull Request #618 · envoyproxy/envoy

junr03 · 2017-03-24T00:52:20Z

No description provided.

mattklein123 · 2017-03-24T03:13:50Z

include/envoy/upstream/upstream.h

+   *         -1 means that the host did not have enough request volume to calculate success rate
+   *         or the cluster did not have enough hosts to run through success rate outlier ejection.
+   */
+  virtual double successRate() const PURE;


Both of these should come directly out of the outlier detector sink via here: https://github.com/lyft/envoy/blob/ce8eb8634f0c6aa24485e17fbd563ecc18d73982/include/envoy/upstream/host_description.h#L51

Don't add to host object.

RomanDzhabarov · 2017-03-27T19:58:32Z

docs/operations/admin.rst

    weight, Integer, Load balancing weight (1-100)
    zone, String, Service zone
    canary, Boolean, Whether the host is a canary
+    success_rate, Double, Request success rate (0-100). -1 if there was not enough request volume to calculate it


can you link to the info about "not enough request volume"?

ccaraman · 2017-03-27T22:12:12Z

include/envoy/upstream/outlier_detection.h

   * Log an ejection event.
   * @param host supplies the host that generated the event.
   * @param type supplies the type of the event.
+   * @param enforced is true if the ejection took place, false if only logging took place.


run on sentence.

ccaraman · 2017-03-27T22:17:44Z

source/common/upstream/outlier_detection_impl.cc

  variance /= valid_success_rate_hosts.size();
  double stdev = std::sqrt(variance);

+  // Set the Detector's member variable


nit: full stop.

RomanDzhabarov · 2017-03-27T22:18:13Z

include/envoy/upstream/outlier_detection.h

  virtual const Optional<SystemTime>& lastUnejectionTime() PURE;
+
+  /**
+   * @return the success rate of the host in the last calculated interval, in the range -1-100.


-1-100 is a bit misleading, as it's [0;100] with -1 as a separate value. I like the way you cover this in docs, maybe do the same here.

mattklein123 · 2017-03-27T22:15:04Z

docs/operations/admin.rst

    weight, Integer, Load balancing weight (1-100)
    zone, String, Service zone
    canary, Boolean, Whether the host is a canary
+    success_rate, Double, "Request success rate (0-100). -1 if there was not enough


Link to some docs here (or write it here) that describe what interval this is over.

mattklein123 · 2017-03-27T22:15:47Z

include/envoy/upstream/outlier_detection.h

+   * Set the success rate of the host.
+   * @param new_success_rate the new success rate calculated for the host in the last interval.
+   */
+  virtual void successRate(double new_success_rate) PURE;


This doesn't need to be in public interface.

mattklein123 · 2017-03-27T22:17:41Z

source/common/upstream/outlier_detection_impl.cc

 double Utility::successRateEjectionThreshold(
-    double success_rate_sum, const std::vector<HostSuccessRatePair>& valid_success_rate_hosts) {
+    double success_rate_sum, const std::vector<HostSuccessRatePair>& valid_success_rate_hosts,
+    double& success_rate_average) {


Instead of passing an out param, can you return a struct. It's easier to grok what is going on.

mattklein123 · 2017-03-27T22:20:36Z

source/common/upstream/outlier_detection_impl.cc

 }

-void EventLoggerImpl::logEject(HostDescriptionConstSharedPtr host, EjectionType type) {
+void EventLoggerImpl::logEject(HostDescriptionConstSharedPtr host, EjectionType type,


Wouldn't it be useful to log some of the SR stats here also to see the SR, the cutoff, etc.?

mattklein123 · 2017-03-27T22:22:03Z

include/envoy/upstream/upstream.h

   */
  virtual ClusterInfoConstSharedPtr info() const PURE;

+  virtual Outlier::DetectorSharedPtr outlierDetector() const PURE;


comment, this should return a pointer to a const detector.

RomanDzhabarov · 2017-03-27T22:25:22Z

source/common/upstream/outlier_detection_impl.h

  static double
  successRateEjectionThreshold(double success_rate_sum,
-                               const std::vector<HostSuccessRatePair>& valid_success_rate_hosts);
+                               const std::vector<HostSuccessRatePair>& valid_success_rate_hosts,


update comment

RomanDzhabarov · 2017-03-27T22:27:35Z

source/server/http/admin.cc

+                               Upstream::Outlier::DetectorSharedPtr outlier_detector,
+                               Buffer::Instance& response) {
+  if (outlier_detector) {
+    response.add(fmt::format("{}::outlier::success_rate_average::{}", cluster_name,


put all these into docs?

mattklein123 · 2017-03-29T19:35:45Z

docs/intro/arch_overview/outlier.rst

-  If ``action`` is ``eject``, species the type of ejection that took place. Currently this can
-  only be ``5xx``.
+  If ``action`` is ``eject``, specifies the type of ejection that took place. Currently this can be:
+  ``5xx``, and ``SuccessRate``.


No comma after 5xx

I thought you were a supporter of the oxford comma ;)

Yes, when there are 3 or more things, not 2.

(Comma still needs to be deleted)

mattklein123 · 2017-03-29T19:37:13Z

docs/intro/arch_overview/outlier.rst

+
+host_success_rate
+  If ``action`` is ``eject``, and ``type`` is ``SuccessRate``, specifies the host's success rate
+  at the time of the ejection event on a ``0-100`` range. A ``-1`` value means that a success


-1 can only happen if type is 5xx, right? This is kind of confusing. Can we just not write out host_succes_rate in the case of 5xx? Same for all the ones below.

-1 can also happen if the type is success rate, i.e if there is no enough request volume. However, you are right it would never happen in the logs. Because, if a host is ejected it is because there was enough data to do that. -1 would happen in the admin /clusters endpoint, not here.

mattklein123 · 2017-03-29T19:39:15Z

docs/operations/admin.rst

+      zone, String, Service zone
+      canary, Boolean, Whether the host is a canary
+      success_rate, Double, "Request success rate (0-100). -1 if there was not enough
+      :ref:`request volume<config_cluster_manager_cluster_outlier_detection_success_rate_request_volume>`


Did you actually look at these docs rendered? This is almost definitely not correct and will look broken.

Yeah, I rendered them and they look correct

mattklein123 · 2017-03-29T19:40:55Z

include/envoy/upstream/upstream.h

+  /**
+   * @return a shared pointer to the cluster's outlier detector. If an outlier detector has not been
+   *         installed, returns a nullptr.
+   */


return const shared pointer has no meaning. You need to return a pointer to a const Detector.

Ah I see this is a const pointer not a pointer to a const object. What we want is to return a pointer to a const object that way we can't change the object through the pointer.

mattklein123 · 2017-03-29T19:41:48Z

source/common/upstream/outlier_detection_impl.cc

+                             host->cluster().name(), host->address()->asString(),
+                             typeToString(type), host->outlierDetector().numEjections(), enforced,
+                             host->outlierDetector().successRate(), detector.successRateAverage(),
+                             detector.successRateEjectionThreshold()));


add break here for next person that comes along.

mattklein123 · 2017-03-29T19:42:34Z

source/common/upstream/outlier_detection_impl.h

 class Utility {
 public:
+  struct EjectionPair {
+    EjectionPair(double success_rate_average, double ejection_threshold)


You don't need constructor here. You can just do aggregate init ( {...} )

mattklein123 · 2017-03-29T19:42:43Z

source/common/upstream/outlier_detection_impl.h

-   * @param success_rate_data is the vector containing the individual success rate data points.
+   * @param valid_success_rate_hosts is the vector containing the individual success rate data
+   * points.
   * @return the success rate threshold.


comment wrong

mattklein123 · 2017-03-29T23:46:33Z

Looks good other than comma still in docs. Do you have 100% coverage?

ccaraman · 2017-03-30T19:48:29Z

docs/intro/arch_overview/outlier.rst

+    "host_success_rate": "...",
+    "cluster_success_rate_average": "...",
+    "cluster_success_rate_ejection_threshold": "..."
+


nit: new line

ccaraman · 2017-03-30T20:46:36Z

docs/intro/arch_overview/outlier.rst

-  If ``action`` is ``eject``, species the type of ejection that took place. Currently this can
-  only be ``5xx``.
+  If ``action`` is ``eject``, specifies the type of ejection that took place. Currently this can be:
+  ``5xx`` and ``SuccessRate``.


The second sentence doesn't make sense. Can you rewrite it? Also colon after be isn't needed.

ccaraman · 2017-03-30T23:38:06Z

docs/intro/arch_overview/outlier.rst

 secs_since_last_action
  The time in seconds since the last action (either an ejection or unejection)
-  took place. This time will be -1 for the first ejection given there is no
+  took place. This time will be ``-1`` for the first ejection given there is no


change this time will be to the value will be

ccaraman · 2017-03-30T23:51:01Z

docs/intro/arch_overview/outlier.rst

+  reason and then re-added).
+
+enforced
+  If ``action`` is ``eject``, specifies if the ejection was actually performed (``true``), or


this sentence is too long and confusing. Please break it up.

ccaraman · 2017-03-30T23:59:44Z

source/common/upstream/outlier_detection_impl.h

      : detector_(detector), host_(host) {
    // Point the success_rate_accumulator_bucket_ pointer to a bucket.
    updateCurrentSuccessRateBucket();
+    success_rate_ = -1;


move to initializer list

ccaraman · 2017-03-31T00:01:06Z

source/common/upstream/outlier_detection_impl.h

  /**
-   * This function returns the success rate threshold for success rate outlier detection. If a
-   * host's success rate is under this threshold the host is an outlier.
+   * This function returns the an EjectionPair for success rate outlier detection. The pair contains


extra the after returns

ccaraman · 2017-03-31T00:01:30Z

source/common/upstream/outlier_detection_impl.h

-   * host's success rate is under this threshold the host is an outlier.
+   * This function returns the an EjectionPair for success rate outlier detection. The pair contains
+   * the average success rate of all valid hosts in the cluster, and the ejection threshold.
+   * If a host's success rate is under this threshold the host is an outlier


nit full stop at the end.

comma after the first sentence

ccaraman · 2017-03-31T00:01:38Z

source/common/upstream/outlier_detection_impl.h

-   * @param success_rate_data is the vector containing the individual success rate data points.
-   * @return the success rate threshold.
+   * @param valid_success_rate_hosts is the vector containing the individual success rate data
+   * points.


nit formating.

ccaraman · 2017-03-31T00:03:07Z

source/common/upstream/outlier_detection_impl.cc

+
+    // Need to update the writer bucket to keep the data valid.
+    host.second->updateCurrentSuccessRateBucket();
+    // Refresh host success rate stat for the /clusters endpoint. If there is a new valid value it


comma after the first sentence in the if sentence.

ccaraman · 2017-03-31T00:04:15Z

source/common/upstream/outlier_detection_impl.h

-   * This function returns the success rate threshold for success rate outlier detection. If a
-   * host's success rate is under this threshold the host is an outlier.
+   * This function returns the an EjectionPair for success rate outlier detection. The pair contains
+   * the average success rate of all valid hosts in the cluster, and the ejection threshold.


no comma needed before the and

ccaraman · 2017-03-31T00:06:23Z

source/common/upstream/outlier_detection_impl.cc

  std::vector<HostSuccessRatePair> valid_success_rate_hosts;
  double success_rate_sum = 0;

+  // Reset the Detector's success rate mean and stdev


nit full stop

ccaraman · 2017-03-31T00:10:28Z

source/common/upstream/outlier_detection_impl.h

  std::list<ChangeStateCb> callbacks_;
  std::unordered_map<HostSharedPtr, DetectorHostSinkImpl*> host_sinks_;
  EventLoggerSharedPtr event_logger_;
+  double success_rate_average_;


do we need default values for these?

including success_rate_ejection_threshold_

ccaraman · 2017-03-31T17:18:01Z

include/envoy/upstream/outlier_detection.h

+  virtual void logUneject(HostDescriptionConstSharedPtr host) PURE;
+};
+
+typedef std::shared_ptr<EventLogger> EventLoggerSharedPtr;


nit: new line after type def

ccaraman

Looks good after few new line nits

* Integrate with new mixer control library. * Update to use splitted control lib. * remove quota config files. * Update per comment

Signed-off-by: Mandar U Jog <mjog@google.com>

Fixes envoyproxy/envoy-mobile#617, which resulted in duplicate symbols from protobuf being present in the final Envoy Mobile binary. The [root cause](bazelbuild/bazel#10484) is being [patched in Bazel](bazelbuild/bazel#10493). In the meantime, we can revert these two commits in protobuf ([first](protocolbuffers/protobuf@7b28278), [second](protocolbuffers/protobuf@a03d332)) and apply the diff as a patch until we're able to update Bazel with the fix. More context on the protobuf issue is available [here](protocolbuffers/protobuf#7046). Notes: - This should be reverted after updating Bazel with the fix - The version of protobuf specified in the `http_archive` should be in lockstep with upstream Envoy's version - Upstream Envoy's `@envoy//bazel:protobuf.patch` patch is also included here Signed-off-by: Michael Rebello <me@michaelrebello.com> Signed-off-by: JP Simard <jp@jpsim.com>

**Commit Message** Separate envoy ai gateway crds to its own chart so helm upgrade can update the crd when there are changes. **Related Issues/PRs (if applicable)** Fixes #513 --------- Signed-off-by: Dan Sun <dsun20@bloomberg.net>

**Commit Message** This switches `ai-gateway-crd-helm` to `ai-gateway-crds-helm` for consistency with Envoy Gateway project. The chart will be pushed to https://hub.docker.com/r/envoyproxy/ai-gateway-crds-helm **Related Issues/PRs (if applicable)** Follow up on #618 --------- Signed-off-by: Takeshi Yoneda <t.y.mathetake@gmail.com>

Jose Nino added 2 commits March 23, 2017 17:51

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junr03 force-pushed the outlier-sr-tooling branch from 363fc10 to 3825f62 Compare March 30, 2017 18:49

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junr03 deleted the outlier-sr-tooling branch March 31, 2017 18:25

vijayendrabvs pushed a commit to vijayendrabvs/envoy that referenced this pull request Apr 4, 2017

outlier: tooling for success rate ejection (envoyproxy#618)

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rshriram pushed a commit to rshriram/envoy that referenced this pull request Oct 30, 2018

Integrate with new mixer control library. (envoyproxy#618)

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* Integrate with new mixer control library. * Update to use splitted control lib. * remove quota config files. * Update per comment

jplevyak pushed a commit to jplevyak/envoy that referenced this pull request Aug 17, 2020

Update to antlr4 472 for Cel (envoyproxy#618)

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Signed-off-by: Mandar U Jog <mjog@google.com>

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junr03 commented Mar 24, 2017 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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mattklein123 commented Mar 29, 2017

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junr03 commented Mar 24, 2017 •

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