all: Recover from panics in goroutines

10 files changed, 86 insertions, 33 deletions

diff --git a/admin.go b/admin.go
index 6831686..1d19066 100644
--- a/admin.go
+++ b/admin.go
@@ -520,16 +520,19 @@ func handleStop(w http.ResponseWriter, r *http.Request) error {
 	if err != nil {
 		Log().Named("admin.api").Error("unload error", zap.Error(err))
 	}
-	go func() {
-		err := stopAdminServer(adminServer)
-		var exitCode int
-		if err != nil {
-			exitCode = ExitCodeFailedQuit
-			Log().Named("admin.api").Error("failed to stop admin server gracefully", zap.Error(err))
-		}
-		Log().Named("admin.api").Info("stopping now, bye!! 👋")
-		os.Exit(exitCode)
-	}()
+	if adminServer != nil {
+		// use goroutine so that we can finish responding to API request
+		go func() {
+			err := stopAdminServer(adminServer)
+			var exitCode int
+			if err != nil {
+				exitCode = ExitCodeFailedQuit
+				Log().Named("admin.api").Error("failed to stop admin server gracefully", zap.Error(err))
+			}
+			Log().Named("admin.api").Info("stopping now, bye!! 👋")
+			os.Exit(exitCode)
+		}()
+	}
 	return nil
 }
 
diff --git a/cmd/main.go b/cmd/main.go
index fd82b96..7e8d9b7 100644
--- a/cmd/main.go
+++ b/cmd/main.go
@@ -20,10 +20,12 @@ import (
 	"fmt"
 	"io"
 	"io/ioutil"
+	"log"
 	"net"
 	"os"
 	"path/filepath"
 	"runtime"
+	"runtime/debug"
 	"strconv"
 	"strings"
 	"time"
@@ -194,6 +196,12 @@ func loadConfig(configFile, adapterName string) ([]byte, string, error) {
 // long enough time. The filename passed in must be the actual
 // config file used, not one to be discovered.
 func watchConfigFile(filename, adapterName string) {
+	defer func() {
+		if err := recover(); err != nil {
+			log.Printf("[PANIC] watching config file: %v\n%s", err, debug.Stack())
+		}
+	}()
+
 	// make our logger; since config reloads can change the
 	// default logger, we need to get it dynamically each time
 	logger := func() *zap.Logger {
diff --git a/go.mod b/go.mod
index ced45d6..ced106f 100644
--- a/go.mod
+++ b/go.mod
@@ -6,9 +6,9 @@ require (
 	github.com/Masterminds/sprig/v3 v3.1.0
 	github.com/alecthomas/chroma v0.7.2
 	github.com/aryann/difflib v0.0.0-20170710044230-e206f873d14a
-	github.com/caddyserver/certmagic v0.10.12
+	github.com/caddyserver/certmagic v0.10.13
 	github.com/dustin/go-humanize v1.0.1-0.20200219035652-afde56e7acac
-	github.com/go-acme/lego/v3 v3.6.0
+	github.com/go-acme/lego/v3 v3.7.0
 	github.com/go-chi/chi v4.1.1+incompatible
 	github.com/gogo/protobuf v1.3.1
 	github.com/google/cel-go v0.4.2
diff --git a/go.sum b/go.sum
index efde76b..97618ef 100644
--- a/go.sum
+++ b/go.sum
@@ -73,7 +73,6 @@ github.com/Shopify/sarama v1.19.0/go.mod h1:FVkBWblsNy7DGZRfXLU0O9RCGt5g3g3yEuWX
 github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
 github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
 github.com/ThomasRooney/gexpect v0.0.0-20161231170123-5482f0350944/go.mod h1:sPML5WwI6oxLRLPuuqbtoOKhtmpVDCYtwsps+I+vjIY=
-github.com/akamai/AkamaiOPEN-edgegrid-golang v0.9.0/go.mod h1:zpDJeKyp9ScW4NNrbdr+Eyxvry3ilGPewKoXw3XGN1k=
 github.com/akamai/AkamaiOPEN-edgegrid-golang v0.9.8/go.mod h1:aVvklgKsPENRkl29bNwrHISa1F+YLGTHArMxZMBqWM8=
 github.com/akavel/rsrc v0.8.0/go.mod h1:uLoCtb9J+EyAqh+26kdrTgmzRBFPGOolLWKpdxkKq+c=
 github.com/alangpierce/go-forceexport v0.0.0-20160317203124-8f1d6941cd75 h1:3ILjVyslFbc4jl1w5TWuvvslFD/nDfR2H8tVaMVLrEY=
@@ -94,9 +93,7 @@ github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuy
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/aliyun/alibaba-cloud-sdk-go v0.0.0-20190808125512-07798873deee/go.mod h1:myCDvQSzCW+wB1WAlocEru4wMGJxy+vlxHdhegi1CDQ=
 github.com/aliyun/alibaba-cloud-sdk-go v1.61.112/go.mod h1:pUKYbK5JQ+1Dfxk80P0qxGqe5dkxDoabbZS7zOcouyA=
-github.com/aliyun/aliyun-oss-go-sdk v0.0.0-20190307165228-86c17b95fcd5/go.mod h1:T/Aws4fEfogEE9v+HPhhw+CntffsBHJ8nXQCwKr0/g8=
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
 github.com/antihax/optional v0.0.0-20180407024304-ca021399b1a6/go.mod h1:V8iCPQYkqmusNa815XgQio277wI47sdRh1dUOLdyC6Q=
 github.com/antlr/antlr4 v0.0.0-20190819145818-b43a4c3a8015 h1:StuiJFxQUsxSCzcby6NFZRdEhPkXD5vxN7TZ4MD6T84=
@@ -107,8 +104,7 @@ github.com/aryann/difflib v0.0.0-20170710044230-e206f873d14a h1:pv34s756C4pEXnjg
 github.com/aryann/difflib v0.0.0-20170710044230-e206f873d14a/go.mod h1:DAHtR1m6lCRdSC2Tm3DSWRPvIPr6xNKyeHdqDQSQT+A=
 github.com/asaskevich/govalidator v0.0.0-20180720115003-f9ffefc3facf/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
 github.com/aws/aws-sdk-go v1.19.18/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
-github.com/aws/aws-sdk-go v1.23.0/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
-github.com/baiyubin/aliyun-sts-go-sdk v0.0.0-20180326062324-cfa1a18b161f/go.mod h1:AuiFmCCPBSrqvVMvuqFuk0qogytodnVFVSN5CeJB8Gc=
+github.com/aws/aws-sdk-go v1.30.20/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
@@ -116,8 +112,8 @@ github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kB
 github.com/bombsimon/wsl/v2 v2.0.0/go.mod h1:mf25kr/SqFEPhhcxW1+7pxzGlW+hIl/hYTKY95VwV8U=
 github.com/bradfitz/go-smtpd v0.0.0-20170404230938-deb6d6237625/go.mod h1:HYsPBTaaSFSlLx/70C2HPIMNZpVV8+vt/A+FMnYP11g=
 github.com/buger/jsonparser v0.0.0-20181115193947-bf1c66bbce23/go.mod h1:bbYlZJ7hK1yFx9hf58LP0zeX7UjIGs20ufpu3evjr+s=
-github.com/caddyserver/certmagic v0.10.12 h1:aZtgzcIssiMSlP0jDdpDBbBzQ5INf5eKL9T6Nf3YzKM=
-github.com/caddyserver/certmagic v0.10.12/go.mod h1:Y8jcUBctgk/IhpAzlHKfimZNyXCkfGgRTC0orl8gROQ=
+github.com/caddyserver/certmagic v0.10.13 h1:wfyYpXVXSSYMS1ZFpSr7HptwsC+j7elda5PUERrHtRc=
+github.com/caddyserver/certmagic v0.10.13/go.mod h1:Yz6cSRUdddGy6Ut5JfrvcqBwrm1BqXxJRqJq2TwjPnA=
 github.com/cenkalti/backoff/v4 v4.0.0 h1:6VeaLF9aI+MAUQ95106HwWzYZgJJpZ4stumjj6RFYAU=
 github.com/cenkalti/backoff/v4 v4.0.0/go.mod h1:eEew/i+1Q6OrCDZh3WiXYv3+nJwBASZ8Bog/87DQnVg=
 github.com/census-instrumentation/opencensus-proto v0.2.0/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
@@ -146,7 +142,6 @@ github.com/coreos/go-semver v0.3.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3Ee
 github.com/coreos/go-systemd v0.0.0-20181012123002-c6f51f82210d/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
-github.com/cpu/goacmedns v0.0.1/go.mod h1:sesf/pNnCYwUevQEQfEwY0Y3DydlQWSGZbaMElOWxok=
 github.com/cpu/goacmedns v0.0.2/go.mod h1:4MipLkI+qScwqtVxcNO6okBhbgRrr7/tKXUSgSL0teQ=
 github.com/cpuguy83/go-md2man v1.0.10 h1:BSKMNlYxDvnunlTymqtgONjNnaRV1sTpcovwwjF22jk=
 github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
@@ -175,7 +170,7 @@ github.com/dlclark/regexp2 v1.1.6/go.mod h1:2pZnwuY/m+8K6iRw6wQdMtk+rH5tNGR1i55k
 github.com/dlclark/regexp2 v1.2.0 h1:8sAhBGEM0dRWogWqWyQeIJnxjWO6oIjl8FKqREDsGfk=
 github.com/dlclark/regexp2 v1.2.0/go.mod h1:2pZnwuY/m+8K6iRw6wQdMtk+rH5tNGR1i55kozfMjCc=
 github.com/dnaeon/go-vcr v0.0.0-20180814043457-aafff18a5cc2/go.mod h1:aBB1+wY4s93YsC3HHjMBMrwTj2R9FHDzUr9KyGc8n1E=
-github.com/dnsimple/dnsimple-go v0.30.0/go.mod h1:O5TJ0/U6r7AfT8niYNlmohpLbCSG+c71tQlGr9SeGrg=
+github.com/dnsimple/dnsimple-go v0.60.0/go.mod h1:O5TJ0/U6r7AfT8niYNlmohpLbCSG+c71tQlGr9SeGrg=
 github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
 github.com/dustin/go-humanize v1.0.1-0.20200219035652-afde56e7acac h1:opbrjaN/L8gg6Xh5D04Tem+8xVcz6ajZlGCs49mQgyg=
 github.com/dustin/go-humanize v1.0.1-0.20200219035652-afde56e7acac/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
@@ -196,9 +191,8 @@ github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/gliderlabs/ssh v0.1.1/go.mod h1:U7qILu1NlMHj9FlMhZLlkCdDnU1DBEAqr0aevW3Awn0=
-github.com/go-acme/lego/v3 v3.4.0/go.mod h1:xYbLDuxq3Hy4bMUT1t9JIuz6GWIWb3m5X+TeTHYaT7M=
-github.com/go-acme/lego/v3 v3.6.0 h1:Rv0MrX3DpVp9Xg77yR7x+PCksLLph3Ut/69/9Kim8ac=
-github.com/go-acme/lego/v3 v3.6.0/go.mod h1:sB/T7hfyz0HYIBvPmz/C8jIaxF6scbbiGKTzbQ22V6A=
+github.com/go-acme/lego/v3 v3.7.0 h1:qC5/8/CbltyAE8fGLE6bGlqucj7pXc/vBxiLwLOsmAQ=
+github.com/go-acme/lego/v3 v3.7.0/go.mod h1:4eDjjYkAsDXyNcwN8IhhZAwxz9Ltiks1Zmpv0q20J7A=
 github.com/go-chi/chi v4.0.2+incompatible h1:maB6vn6FqCxrpz4FqWdh4+lwpyZIQS7YEAUcHlgXVRs=
 github.com/go-chi/chi v4.0.2+incompatible/go.mod h1:eB3wogJHnLi3x/kFX2A+IbTBlXxmMeXJVKy9tTv1XzQ=
 github.com/go-chi/chi v4.1.1+incompatible h1:MmTgB0R8Bt/jccxp+t6S/1VGIKdJw5J74CK/c9tTfA4=
@@ -210,7 +204,6 @@ github.com/go-errors/errors v1.0.1/go.mod h1:f4zRHt4oKfwPJE5k8C9vpYG+aDHdBFUsgrm
 github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
-github.com/go-ini/ini v1.44.0/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3Ies8=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-lintpack/lintpack v0.5.2/go.mod h1:NwZuYi2nUHho8XEIZ6SIxihrnPoqBTDqfpXvXAN0sXM=
@@ -219,6 +212,8 @@ github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V
 github.com/go-ole/go-ole v1.2.1/go.mod h1:7FAglXiTm7HKlQRDeOQ6ZNUHidzCWXuZWq/1dTyBNF8=
 github.com/go-sql-driver/mysql v1.4.1 h1:g24URVg0OFbNUTx9qqY1IRZ9D9z3iPyi5zKhQZpNwpA=
 github.com/go-sql-driver/mysql v1.4.1/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
+github.com/go-sql-driver/mysql v1.5.0 h1:ozyZYNQW3x3HtqT1jira07DN2PArx2v7/mN66gGcHOs=
+github.com/go-sql-driver/mysql v1.5.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/go-toolsmith/astcast v1.0.0/go.mod h1:mt2OdQTeAQcY4DQgPSArJjHCcOwlX+Wl/kwN+LbLGQ4=
 github.com/go-toolsmith/astcopy v1.0.0/go.mod h1:vrgyG+5Bxrnz4MZWPF+pI4R8h3qKRjjyvV/DSez4WVQ=
@@ -345,7 +340,6 @@ github.com/grpc-ecosystem/grpc-gateway v1.12.1/go.mod h1:8XEsbTttt/W+VvjtQhLACqC
 github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542/go.mod h1:Ow0tF8D4Kplbc8s8sSb3V2oUCygFHVp8gC3Dn6U4MNI=
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
-github.com/hashicorp/golang-lru v0.5.3/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uGBxy+E8yxSoD4=
 github.com/hashicorp/hcl v0.0.0-20180404174102-ef8a98b0bbce/go.mod h1:oZtUIOe8dh44I2q6ScRibXws4Ajl+d+nod3AaR9vL5w=
 github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
 github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
@@ -365,6 +359,7 @@ github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANyt
 github.com/jellevandenhooff/dkim v0.0.0-20150330215556-f50fe3d243e1/go.mod h1:E0B/fFc00Y+Rasa88328GlI/XbtyysCtTHZS8h7IrBU=
 github.com/jessevdk/go-flags v1.4.0/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
 github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
+github.com/jmespath/go-jmespath v0.3.0/go.mod h1:9QtRXoHjLGCJ5IBSaohpXITPlowMeeYCZ7fLUTSywik=
 github.com/jonboulle/clockwork v0.1.0/go.mod h1:Ii8DK3G1RaLaWxj9trq07+26W01tbo22gdxWY5EU2bo=
 github.com/json-iterator/go v1.1.5/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
 github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
@@ -449,7 +444,6 @@ github.com/mattn/go-tty v0.0.0-20180219170247-931426f7535a/go.mod h1:XPvLUNfbS4f
 github.com/mattn/goveralls v0.0.2/go.mod h1:8d1ZMHsd7fW6IRPKQh46F2WRpyib5/X4FOpevwGNQEw=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
 github.com/microcosm-cc/bluemonday v1.0.1/go.mod h1:hsXNsILzKxV+sX77C5b8FSuKF00vh2OMYv+xgHpAMF4=
-github.com/miekg/dns v1.1.15/go.mod h1:W1PPwlIAgtquWBMBEV9nkV9Cazfe8ScdGz/Lj7v3Nrg=
 github.com/miekg/dns v1.1.27 h1:aEH/kqUzUxGJ/UHcEKdJY+ugH6WEzsEBBSPa8zuy1aM=
 github.com/miekg/dns v1.1.27/go.mod h1:KNUDUusw/aVsxyTYZM1oqvCicbwhgbNgztCETuNZ7xM=
 github.com/miekg/pkcs11 v1.0.2/go.mod h1:XsNlhZGX73bx86s2hdc/FuaLm2CPZJemRLMA+WTFxgs=
@@ -486,7 +480,6 @@ github.com/neelance/astrewrite v0.0.0-20160511093645-99348263ae86/go.mod h1:kHJE
 github.com/neelance/sourcemap v0.0.0-20151028013722-8c68805598ab/go.mod h1:Qr6/a/Q4r9LP1IltGz7tA7iOK1WonHEYhu1HRBA7ZiM=
 github.com/newrelic/go-agent v2.15.0+incompatible/go.mod h1:a8Fv1b/fYhFSReoTU6HDkTYIMZeSVNffmoS726Y0LzQ=
 github.com/nkovacs/streamquote v0.0.0-20170412213628-49af9bddb229/go.mod h1:0aYXnNPJ8l7uZxf45rWW1a/uME32OF0rhiYGNQ2oF2E=
-github.com/nrdcg/auroradns v1.0.0/go.mod h1:6JPXKzIRzZzMqtTDgueIhTi6rFf1QvYE/HzqidhOhjw=
 github.com/nrdcg/auroradns v1.0.1/go.mod h1:y4pc0i9QXYlFCWrhWrUSIETnZgrf4KuwjDIWmmXo3JI=
 github.com/nrdcg/dnspod-go v0.4.0/go.mod h1:vZSoFSFeQVm2gWLMkyX61LZ8HI3BaqtHZWgPTGKr6KQ=
 github.com/nrdcg/goinwx v0.6.1/go.mod h1:XPiut7enlbEdntAqalBIqcYcTEVhpv/dKWgDCX2SwKQ=
@@ -520,6 +513,8 @@ github.com/pierrec/lz4 v2.0.5+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/pquerna/otp v1.0.0/go.mod h1:Zad1CMQfSQZI5KLpahDiSUX4tMMREnXw98IvL1nhgMk=
@@ -570,7 +565,6 @@ github.com/ryanuber/go-glob v0.0.0-20170128012129-256dc444b735/go.mod h1:807d1WS
 github.com/sacloud/libsacloud v1.26.1/go.mod h1:79ZwATmHLIFZIMd7sxA3LwzVy/B77uj3LDoToVTxDoQ=
 github.com/samfoo/ansi v0.0.0-20160124022901-b6bd2ded7189 h1:CmSpbxmewNQbzqztaY0bke1qzHhyNyC29wYgh17Gxfo=
 github.com/samfoo/ansi v0.0.0-20160124022901-b6bd2ded7189/go.mod h1:UUwuHEJ9zkkPDxspIHOa59PUeSkGFljESGzbxntLmIg=
-github.com/satori/go.uuid v1.2.0/go.mod h1:dA0hQrYB0VpLJoorglMZABFdXlWrHn1NEOzdhQKdks0=
 github.com/securego/gosec v0.0.0-20191002120514-e680875ea14d/go.mod h1:w5+eXa0mYznDkHaMCXA4XYffjlH+cy1oyKbfzJXa2Do=
 github.com/securego/gosec v0.0.0-20200106085552-9cb83e10afad/go.mod h1:7fJLcv5NlMd4t9waQEDLgpZeE3nv4D5DMz5JuZZGufg=
 github.com/sergi/go-diff v1.0.0 h1:Kpca3qRNrduNnOQeazBd0ysaKrUJiIuISHxogkT9RPQ=
@@ -671,7 +665,6 @@ github.com/timewasted/linode v0.0.0-20160829202747-37e84520dcf7/go.mod h1:imsgLp
 github.com/tmc/grpc-websocket-proxy v0.0.0-20190109142713-0ad062ec5ee5/go.mod h1:ncp9v5uamzpCO7NfCPTXjqaC+bZgJeR0sMTm6dMHP7U=
 github.com/tomasen/realip v0.0.0-20180522021738-f0c99a92ddce/go.mod h1:o8v6yHRoik09Xen7gje4m9ERNah1d1PPsVq1VEx9vE4=
 github.com/tommy-muehle/go-mnd v1.1.1/go.mod h1:dSUh0FtTP8VhvkL1S+gUR1OKd9ZnSaozuI6r3m6wOig=
-github.com/transip/gotransip v0.0.0-20190812104329-6d8d9179b66f/go.mod h1:i0f4R4o2HM0m3DZYQWsj6/MEowD57VzoH0v3d7igeFY=
 github.com/transip/gotransip/v6 v6.0.2/go.mod h1:pQZ36hWWRahCUXkFWlx9Hs711gLd8J4qdgLdRzmtY+g=
 github.com/uber-go/atomic v1.3.2/go.mod h1:/Ct5t2lcmbJ4OSe/waGBoaVvVqtO0bmtfVNex1PFV8g=
 github.com/ugorji/go v1.1.4/go.mod h1:uQMGLiO92mf5W77hV/PUCpI3pbzQx3CRekS0kk+RGrc=
@@ -696,7 +689,6 @@ github.com/vultr/govultr v0.1.4/go.mod h1:9H008Uxr/C4vFNGLqKx232C206GL0PBHzOP080
 github.com/weppos/publicsuffix-go v0.4.0/go.mod h1:z3LCPQ38eedDQSwmsSRW4Y7t2L8Ln16JPQ02lHAdn5k=
 github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f/go.mod h1:N2zxlSyiKSe5eX1tZViRH5QA0qijqEDrYZiPEAiq3wU=
 github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415/go.mod h1:GwrjFmJcFw6At/Gs6z4yjiIwzuJ1/+UwLxMQDVQXShQ=
-github.com/xeipuuv/gojsonschema v1.1.0/go.mod h1:5yf86TLmAcydyeJq5YvxkGPE2fm/u4myDekKRoLuqhs=
 github.com/xeipuuv/gojsonschema v1.2.0/go.mod h1:anYRn/JVcOK2ZgGU+IjEV4nwlhoK5sQluxsYJ78Id3Y=
 github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q53MR2AWcXfiuqkDkRtnGDLqkBTpCHuJHxtU=
 github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
@@ -825,7 +817,6 @@ golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20190923162816-aa69164e4478/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190930134127-c5a3c61f89f3/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20191002035440-2ec189313ef0/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20191027093000-83d349e8ac1a/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200114155413-6afb5195e5aa/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -1044,7 +1035,6 @@ gopkg.in/gemnasium/logrus-airbrake-hook.v2 v2.1.2/go.mod h1:Xk6kEKp8OKb+X14hQBKW
 gopkg.in/h2non/gock.v1 v1.0.15/go.mod h1:sX4zAkdYX1TRGJ2JY156cFspQn4yRWn6p9EMdODlynE=
 gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
 gopkg.in/ini.v1 v1.42.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
-gopkg.in/ini.v1 v1.44.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/ini.v1 v1.51.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/ini.v1 v1.51.1/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/natefinch/lumberjack.v2 v2.0.0 h1:1Lc07Kr7qY4U2YPouBjpCLxpiyxIVoxqXgkXLknAOE8=
diff --git a/modules/caddyhttp/reverseproxy/healthchecks.go b/modules/caddyhttp/reverseproxy/healthchecks.go
index 02d8438..96c9be2 100644
--- a/modules/caddyhttp/reverseproxy/healthchecks.go
+++ b/modules/caddyhttp/reverseproxy/healthchecks.go
@@ -19,10 +19,12 @@ import (
 	"fmt"
 	"io"
 	"io/ioutil"
+	"log"
 	"net"
 	"net/http"
 	"net/url"
 	"regexp"
+	"runtime/debug"
 	"strconv"
 	"time"
 
@@ -124,6 +126,11 @@ type CircuitBreaker interface {
 // regular basis and blocks until
 // h.HealthChecks.Active.stopChan is closed.
 func (h *Handler) activeHealthChecker() {
+	defer func() {
+		if err := recover(); err != nil {
+			log.Printf("[PANIC] active health checks: %v\n%s", err, debug.Stack())
+		}
+	}()
 	ticker := time.NewTicker(time.Duration(h.HealthChecks.Active.Interval))
 	h.doActiveHealthCheckForAllHosts()
 	for {
@@ -143,6 +150,11 @@ func (h *Handler) activeHealthChecker() {
 func (h *Handler) doActiveHealthCheckForAllHosts() {
 	for _, upstream := range h.Upstreams {
 		go func(upstream *Upstream) {
+			defer func() {
+				if err := recover(); err != nil {
+					log.Printf("[PANIC] active health check: %v\n%s", err, debug.Stack())
+				}
+			}()
 			networkAddr := upstream.Dial
 			addr, err := caddy.ParseNetworkAddress(networkAddr)
 			if err != nil {
@@ -335,6 +347,11 @@ func (h *Handler) countFailure(upstream *Upstream) {
 
 	// forget it later
 	go func(host Host, failDuration time.Duration) {
+		defer func() {
+			if err := recover(); err != nil {
+				log.Printf("[PANIC] health check failure forgetter: %v\n%s", err, debug.Stack())
+			}
+		}()
 		time.Sleep(failDuration)
 		err := host.CountFail(-1)
 		if err != nil {
diff --git a/modules/caddypki/maintain.go b/modules/caddypki/maintain.go
index 2fce0d9..c0b277d 100644
--- a/modules/caddypki/maintain.go
+++ b/modules/caddypki/maintain.go
@@ -17,12 +17,20 @@ package caddypki
 import (
 	"crypto/x509"
 	"fmt"
+	"log"
+	"runtime/debug"
 	"time"
 
 	"go.uber.org/zap"
 )
 
 func (p *PKI) maintenance() {
+	defer func() {
+		if err := recover(); err != nil {
+			log.Printf("[PANIC] PKI maintenance: %v\n%s", err, debug.Stack())
+		}
+	}()
+
 	ticker := time.NewTicker(10 * time.Minute) // TODO: make configurable
 	defer ticker.Stop()
 
diff --git a/modules/caddytls/distributedstek/distributedstek.go b/modules/caddytls/distributedstek/distributedstek.go
index 6fc48a2..807f2bb 100644
--- a/modules/caddytls/distributedstek/distributedstek.go
+++ b/modules/caddytls/distributedstek/distributedstek.go
@@ -28,6 +28,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"log"
+	"runtime/debug"
 	"time"
 
 	"github.com/caddyserver/caddy/v2"
@@ -193,6 +194,11 @@ func (s *Provider) rotateKeys(oldSTEK distributedSTEK) (distributedSTEK, error)
 // rotate rotates keys on a regular basis, sending each updated set of
 // keys down keysChan, until doneChan is closed.
 func (s *Provider) rotate(doneChan <-chan struct{}, keysChan chan<- [][32]byte) {
+	defer func() {
+		if err := recover(); err != nil {
+			log.Printf("[PANIC] distributed STEK rotation: %v\n%s", err, debug.Stack())
+		}
+	}()
 	for {
 		select {
 		case <-s.timer.C:
diff --git a/modules/caddytls/sessiontickets.go b/modules/caddytls/sessiontickets.go
index 258c135..bfc5628 100644
--- a/modules/caddytls/sessiontickets.go
+++ b/modules/caddytls/sessiontickets.go
@@ -20,6 +20,8 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"log"
+	"runtime/debug"
 	"sync"
 	"time"
 
@@ -118,6 +120,12 @@ func (s *SessionTicketService) start() error {
 // the keys whenever new ones are sent. It reads
 // from keysChan until s.stop() is called.
 func (s *SessionTicketService) stayUpdated() {
+	defer func() {
+		if err := recover(); err != nil {
+			log.Printf("[PANIC] session ticket service: %v\n%s", err, debug.Stack())
+		}
+	}()
+
 	// this call is essential when Initialize()
 	// returns without error, because the stop
 	// channel is the only way the key source
diff --git a/modules/caddytls/standardstek/stek.go b/modules/caddytls/standardstek/stek.go
index eb609ca..61cab0e 100644
--- a/modules/caddytls/standardstek/stek.go
+++ b/modules/caddytls/standardstek/stek.go
@@ -16,6 +16,7 @@ package standardstek
 
 import (
 	"log"
+	"runtime/debug"
 	"sync"
 	"time"
 
@@ -81,6 +82,11 @@ func (s *standardSTEKProvider) Next(doneChan <-chan struct{}) <-chan [][32]byte
 // rotate rotates keys on a regular basis, sending each updated set of
 // keys down keysChan, until doneChan is closed.
 func (s *standardSTEKProvider) rotate(doneChan <-chan struct{}, keysChan chan<- [][32]byte) {
+	defer func() {
+		if err := recover(); err != nil {
+			log.Printf("[PANIC] standard STEK rotation: %v\n%s", err, debug.Stack())
+		}
+	}()
 	for {
 		select {
 		case now := <-s.timer.C:
diff --git a/modules/caddytls/tls.go b/modules/caddytls/tls.go
index 0e92f05..7f2d23e 100644
--- a/modules/caddytls/tls.go
+++ b/modules/caddytls/tls.go
@@ -19,9 +19,11 @@ import (
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
+	"log"
 	"net/http"
 	"os"
 	"path/filepath"
+	"runtime/debug"
 	"strings"
 	"sync"
 	"time"
@@ -367,6 +369,11 @@ func (t *TLS) keepStorageClean() {
 	t.storageCleanTicker = time.NewTicker(storageCleanInterval)
 	t.storageCleanStop = make(chan struct{})
 	go func() {
+		defer func() {
+			if err := recover(); err != nil {
+				log.Printf("[PANIC] storage cleaner: %v\n%s", err, debug.Stack())
+			}
+		}()
 		for {
 			select {
 			case <-t.storageCleanStop: