jepsen: reconfigure nemesis + add db nemesis

script/jepsen.garage/README.md

@@ -97,6 +97,8 @@ Results:
 
 - For now, no failures with clock-scramble nemesis + partition nemesis -> TODO long test run
 
+- Does not seem to fail with partition + layout reconfiguration nemesis (>100 runs)
+
 - Does not seem to fail with the clock scrambler + partition + layout reconfiguation nemesis (>10 runs), although theoretically it could
 
 TODO: make it fail!!!

script/jepsen.garage/src/jepsen/garage.clj

@@ -27,7 +27,8 @@
    "cp" grgNemesis/scenario-cp
    "r"  grgNemesis/scenario-r
    "pr"  grgNemesis/scenario-pr
-   "cpr"  grgNemesis/scenario-cpr})
+   "cpr"  grgNemesis/scenario-cpr
+   "dpr"  grgNemesis/scenario-dpr})
 
 (def patches
   "A map of patch names to Garage builds"
@@ -59,15 +60,16 @@
   "Given an options map from the command line runner (e.g. :nodes, :ssh,
   :concurrency, ...), constructs a test map."
   [opts]
-  (let [workload ((get workloads (:workload opts)) opts)
+  (let [garage-version (get patches (:patch opts))
-        scenario ((get scenari (:scenario opts)) opts)
+        db (grg/db garage-version)
-        garage-version (get patches (:patch opts))]
+        workload ((get workloads (:workload opts)) opts)
+        scenario ((get scenari (:scenario opts)) (assoc opts :db db))]
     (merge tests/noop-test
            opts
            {:pure-generators  true
             :name             (str "garage " (name (:workload opts)))
             :os               debian/os
-            :db               (grg/db garage-version)
+            :db               db
             :client           (:client workload)
             :generator        (gen/phases
                                 (->>
@@ -82,7 +84,7 @@
                                 (gen/clients (:final-generator workload)))
             :nemesis          (:nemesis scenario)
             :checker          (checker/compose
-                                {:perf (checker/perf)
+                                {:perf (checker/perf (:perf scenario))
                                  :workload (:checker workload)})
             })))
 

script/jepsen.garage/src/jepsen/garage/daemon.clj

@@ -119,6 +119,24 @@
         (c/exec :rm :-rf data-dir)
         (c/exec :rm :-rf meta-dir)))
 
+    db/Pause
+    (pause! [_ test node]
+      (cu/grepkill! :stop binary))
+    (resume! [_ test node]
+      (cu/grepkill! :cont binary))
+
+    db/Kill
+    (kill! [_ test node]
+      (cu/stop-daemon! binary pidfile))
+    (start! [_ test node]
+      (cu/start-daemon!
+        {:logfile logfile
+         :pidfile pidfile
+         :chdir base-dir
+         :env {:RUST_LOG "garage=debug,garage_api=trace"}}
+        binary
+        :server))
+
     db/LogFiles
     (log-files [_ test node]
       [logfile])))

script/jepsen.garage/src/jepsen/garage/nemesis.clj

@@ -4,6 +4,7 @@
              [core :as jepsen]
              [generator :as gen]
              [nemesis :as nemesis]]
+            [jepsen.nemesis.combined :as combined]
             [jepsen.garage.daemon :as grg]
             [jepsen.control.util :as cu]))
 
@@ -11,21 +12,23 @@
 
 (defn configure-present!
   "Configure node to be active in new cluster layout"
-  [test node]
+  [test nodes]
-  (info "configure-present!" node)
+  (info "configure-present!" nodes)
-  (let [node-id (c/on node (c/exec grg/binary :node :id :-q))]
+  (let [node-ids (c/on-many nodes (c/exec grg/binary :node :id :-q))
+        node-id-strs (map (fn [[_ v]] (subs v  0 16)) node-ids)]
     (c/on
       (jepsen/primary test)
-     (c/exec grg/binary :layout :assign (subs node-id 0 16) :-c :1G))))
+      (apply c/exec (concat [grg/binary :layout :assign :-c :1G] node-id-strs)))))
 
 (defn configure-absent!
-  "Configure node to be active in new cluster layout"
+  "Configure nodes to be active in new cluster layout"
-  [test node]
+  [test nodes]
-  (info "configure-absent!" node)
+  (info "configure-absent!" nodes)
-  (let [node-id (c/on node (c/exec grg/binary :node :id :-q))]
+  (let [node-ids (c/on-many nodes (c/exec grg/binary :node :id :-q))
+        node-id-strs (map (fn [[_ v]] (subs v  0 16)) node-ids)]
     (c/on
       (jepsen/primary test)
-     (c/exec grg/binary :layout :assign (subs node-id 0 16) :-g))))
+      (apply c/exec (concat [grg/binary :layout :assign :-g] node-id-strs)))))
 
 (defn finalize-config!
   "Apply the proposed cluster layout"
@@ -53,14 +56,14 @@
                      shuffle
                      (split-at cnt))]
             (info "layout split: keep " keep-nodes ", remove " remove-nodes)
-            (run! #(configure-present! test %) keep-nodes)
+            (configure-present! test keep-nodes)
-            (run! #(configure-absent! test %) remove-nodes)
+            (configure-absent! test remove-nodes)
             (finalize-config! test)
             (assoc op :value keep-nodes))
         :stop
           (do
             (info "layout un-split: all nodes=" (:nodes test))
-            (run! #(configure-present! test %) (:nodes test))
+            (configure-present! test (:nodes test))
             (finalize-config! test)
             (assoc op :value (:nodes test)))))
 
@@ -73,70 +76,58 @@
   [op]
   (fn [_ _] {:type :info, :f op}))
 
-(defn scenario-c
+(defn reconfiguration-package
-  "Clock scramble scenario"
+  "Cluster reconfiguration nemesis package"
-  [opts]
-  {:generator        (->>
-                       (nemesis-op :clock-scramble)
-                       (gen/stagger 5))
-   :nemesis          (nemesis/compose
-                       {{:clock-scramble :scramble} (nemesis/clock-scrambler 20.0)})})
-
-(defn scenario-cp
-  "Clock scramble + partition scenario"
-  [opts]
-  {:generator        (->>
-                       (gen/mix [(nemesis-op :clock-scramble)
-                                 (nemesis-op :partition-stop)
-                                 (nemesis-op :partition-start)])
-                       (gen/stagger 5))
-   :final-generator  (gen/once {:type :info, :f :partition-stop})
-   :nemesis          (nemesis/compose
-                       {{:clock-scramble :scramble} (nemesis/clock-scrambler 20.0)
-                        {:partition-start :start
-                         :partition-stop :stop} (nemesis/partition-random-halves)})})
-
-(defn scenario-r
-  "Cluster reconfiguration scenario"
   [opts]
   {:generator        (->>
                        (gen/mix [(nemesis-op :reconfigure-start)
                                  (nemesis-op :reconfigure-stop)])
-                       (gen/stagger 5))
+                       (gen/stagger (:interval opts 5)))
+   :final-generator  {:type :info, :f :reconfigure-stop}
    :nemesis          (nemesis/compose
                        {{:reconfigure-start :start
-                         :reconfigure-stop :stop} (reconfigure-subset 3)})})
+                         :reconfigure-stop :stop} (reconfigure-subset 3)})
+   :perf              #{{:name  "reconfigure"
+                         :start #{:reconfigure-start}
+                         :stop  #{:reconfigur-stop}
+                         :color "#A197E9"}}})
+
+(defn scenario-c
+  "Clock modifying scenario"
+  [opts]
+  (combined/clock-package {:db (:db opts), :interval 1, :faults #{:clock}}))
+
+(defn scenario-cp
+  "Clock modifying + partition scenario"
+  [opts]
+  (combined/compose-packages
+    [(combined/clock-package {:db (:db opts), :interval 1, :faults #{:clock}})
+     (combined/partition-package {:db (:db opts), :interval 1, :faults #{:partition}})]))
+
+(defn scenario-r
+  "Cluster reconfiguration scenario"
+  [opts]
+  (reconfiguration-package {:interval 1}))
 
 (defn scenario-pr
   "Partition + cluster reconfiguration scenario"
   [opts]
-  {:generator        (->>
+  (combined/compose-packages
-                       (gen/mix [(nemesis-op :partition-start)
+    [(combined/partition-package {:db (:db opts), :interval 1, :faults #{:partition}})
-                                 (nemesis-op :partition-stop)
+     (reconfiguration-package {:interval 1})]))
-                                 (nemesis-op :reconfigure-start)
-                                 (nemesis-op :reconfigure-stop)])
-                       (gen/stagger 5))
-   :final-generator  (gen/once {:type :info, :f :partition-stop})
-   :nemesis          (nemesis/compose
-                       {{:partition-start :start
-                         :partition-stop :stop} (nemesis/partition-random-halves)
-                        {:reconfigure-start :start
-                         :reconfigure-stop :stop} (reconfigure-subset 3)})})
 
 (defn scenario-cpr
   "Clock scramble + partition + cluster reconfiguration scenario"
   [opts]
-  {:generator        (->>
+  (combined/compose-packages
-                       (gen/mix [(nemesis-op :clock-scramble)
+    [(combined/clock-package {:db (:db opts), :interval 1, :faults #{:clock}})
-                                 (nemesis-op :partition-start)
+     (combined/partition-package {:db (:db opts), :interval 1, :faults #{:partition}})
-                                 (nemesis-op :partition-stop)
+     (reconfiguration-package {:interval 1})]))
-                                 (nemesis-op :reconfigure-start)
+
-                                 (nemesis-op :reconfigure-stop)])
+(defn scenario-dpr
-                       (gen/stagger 5))
+  "Db + partition + cluster reconfiguration scenario"
-   :final-generator  (gen/once {:type :info, :f :partition-stop})
+  [opts]
-   :nemesis          (nemesis/compose
+  (combined/compose-packages
-                       {{:clock-scramble :scramble} (nemesis/clock-scrambler 20.0)
+    [(combined/db-package {:db (:db opts), :interval 1, :faults #{:db :pause :kill}})
-                        {:partition-start :start
+     (combined/partition-package {:db (:db opts), :interval 1, :faults #{:partition}})
-                         :partition-stop :stop} (nemesis/partition-random-halves)
+     (reconfiguration-package {:interval 1})]))
-                        {:reconfigure-start :start
-                         :reconfigure-stop :stop} (reconfigure-subset 3)})})

script/jepsen.garage/src/jepsen/garage/reg.clj

@@ -30,6 +30,7 @@
     (assoc this :creds (grg/creds node)))
   (setup! [this test])
   (invoke! [this test op]
+    (try+
       (let [[k v] (:value op)]
         (case (:f op)
           :read
@@ -44,7 +45,13 @@
               (assoc op :type :info, :error ::timeout)
               (do
                 (s3/put (:creds this) k v)
-              (assoc op :type :ok))))))
+                (assoc op :type :ok)))))
+      (catch (re-find #"Unavailable" (.getMessage %)) ex
+        (assoc op :type :info, :error ::unavailable))
+      (catch (re-find #"Broken pipe" (.getMessage %)) ex
+        (assoc op :type :info, :error ::broken-pipe))
+      (catch (re-find #"Connection refused" (.getMessage %)) ex
+        (assoc op :type :info, :error ::connection-refused))))
   (teardown! [this test])
   (close! [this test]))
 

script/jepsen.garage/src/jepsen/garage/set.clj

@@ -30,6 +30,7 @@
     (assoc this :creds (grg/creds node)))
   (setup! [this test])
   (invoke! [this test op]
+    (try+
       (let [[k v] (:value op)
             prefix (str "set" k "/")]
         (case (:f op)
@@ -50,7 +51,13 @@
                                             (assert (str/starts-with? o prefix))
                                             (str/replace-first o prefix "")) items)
                         items-set (set (map parse-long items-stripped))]
-                  (assoc op :type :ok, :value (independent/tuple k items-set)))))))))
+                    (assoc op :type :ok, :value (independent/tuple k items-set))))))))
+      (catch (re-find #"Unavailable" (.getMessage %)) ex
+        (assoc op :type :info, :error ::unavailable))
+      (catch (re-find #"Broken pipe" (.getMessage %)) ex
+        (assoc op :type :info, :error ::broken-pipe))
+      (catch (re-find #"Connection refused" (.getMessage %)) ex
+        (assoc op :type :info, :error ::connection-refused))))
   (teardown! [this test])
   (close! [this test]))