Kubernetes enhancements to consul

.travis.yml

@@ -1,13 +1,13 @@
 language: go
 
 go:
-  - tip
+  - 1.6
 
 branches:
   only:
     - master
 
-install: make deps
+install: make
 script:
   - make test
 

CHANGELOG.md

@@ -1,31 +1,109 @@
 ## 0.7.0 (UNRELEASED)
 
+BACKWARDS INCOMPATIBILITIES:
+
+* `skip_leave_on_interrupt`'s default behavior is now dependent on whether or
+  not the agent is acting as a server or client.  When Consul is started as a
+  server the default is `true` and `false` when a client. [GH-1909]
+* HTTP check output is truncated to 4k, similar to script check output. [GH-1952]
+
 IMPROVEMENTS:
 
 * Consul agents will now periodically reconnect to available Consul servers
   in order to redistribute their RPC query load.  Consul clients will, by
-  default, attempt to establish a new connection every 120s to 180s, however
-  the rate at which agents begin to query new servers is proportional to the
-  size of the Consul cluster (servers should never receive more than 64 new
-  connections per second per Consul server as a result of rebalancing).
-  Clusters in stable environments who use `allow_stale` should see a more
-  even distribution of query load across all of their Consul servers. [GH-1667]
-* Added a new `disable_hostname` configuration option to control whether Consul's
-  runtime telemetry gets prepended with the host name. All of the telemetry
-  configuration has also been moved to a `telemetry` nested structure, but the old
-  format is currently still supported. [GH-1284]
+  default, attempt to establish a new connection every 120s to 180s unless
+  the size of the cluster is sufficiently large.  The rate at which agents
+  begin to query new servers is proportional to the size of the Consul
+  cluster (servers should never receive more than 64 new connections per
+  second per Consul server as a result of rebalancing).  Clusters in stable
+  environments who use `allow_stale` should see a more even distribution of
+  query load across all of their Consul servers. [GH-1743]
+* Consul agents can now limit the number of UDP answers returned via the DNS
+  interface. The default number of UDP answers is `3`, however by adjusting
+  the `dns_config.udp_answer_limit` configuration parameter, it is now
+  possible to limit the results down to `1`.  This tunable provides
+  environments where RFC3484 section 6, rule 9 is enforced with an important
+  workaround in order to preserve the desired behavior of randomized DNS
+  results.  Most modern environments will not need to adjust this setting as
+  this RFC was made obsolete by RFC 6724.  See the
+  [agent options](https://www.consul.io/docs/agent/options.html#udp_answer_limit)
+  documentation for additional details for when this should be
+  used. [GH-1712]
+* Consul will now refuse to start with a helpful message if the same UNIX
+  socket is used for more than one listening endpoint. [GH-1910]
+* Removed an obsolete warning message when Consul starts on Windows. [GH-1920]
+* Defaults bind address to 127.0.0.1 when running in `-dev` mode. [GH-1878]
+* Builds Consul releases with Go 1.6.1. [GH-1948]
+* HTTP health checks limit saved output to 4K to avoid performance issues [GH-1952]
+
+BUG FIXES:
+
+* Fixed an issue where a health check's output never updates if the check
+  status doesn't change after the Consul agent starts. [GH-1934]
+
+## 0.6.4 (March 16, 2016)
+
+BACKWARDS INCOMPATIBILITIES:
+
+* Added a new `query` ACL type to manage prepared query names, and stopped capturing
+  ACL tokens by default when prepared queries are created. This won't affect existing
+  queries and how they are executed, but this will affect how they are managed. Now
+  management of prepared queries can be delegated within an organization. If you use
+  prepared queries, you'll need to read the
+  [Consul 0.6.4 upgrade instructions](https://www.consul.io/docs/upgrade-specific.html)
+  before upgrading to this version of Consul. [GH-1748]
+* Consul's Go API client now pools connections by default, and requires you to manually
+  opt-out of this behavior. Previously, idle connections were supported and their
+  lifetime was managed by a finalizer, but this wasn't reliable in certain situations.
+  If you reuse an API client object during the lifetime of your application, then there's
+  nothing to do. If you have short-lived API client objects, you may need to configure them
+  using the new `api.DefaultNonPooledConfig()` method to avoid leaking idle connections. [GH-1825]
+* Consul's Go API client's `agent.UpdateTTL()` function was updated in a way that will
+  only work with Consul 0.6.4 and later. The `agent.PassTTL()`, `agent.WarnTTL()`, and
+  `agent.FailTTL()` functions were not affected and will continue work with older
+  versions of Consul. [GH-1794]
+
+FEATURES:
+
+* Added new template prepared queries which allow you to define a prefix (possibly even
+  an empty prefix) to apply prepared query features like datacenter failover to multiple
+  services with a single query definition. This makes it easy to apply a common policy to
+  multiple services without having to manage many prepared queries. See
+  [Prepared Query Templates](https://www.consul.io/docs/agent/http/query.html#templates)
+  for more details. [GH-1764]
 * Added a new ability to translate address lookups when doing queries of nodes in
   remote datacenters via DNS using a new `translate_wan_addrs` configuration
   option. This allows the node to be reached within its own datacenter using its
   local address, and reached from other datacenters using its WAN address, which is
   useful in hybrid setups with mixed networks. [GH-1698]
 
+IMPROVEMENTS:
+
+* Added a new `disable_hostname` configuration option to control whether Consul's
+  runtime telemetry gets prepended with the host name. All of the telemetry
+  configuration has also been moved to a `telemetry` nested structure, but the old
+  format is currently still supported. [GH-1284]
+* Consul's Go dependencies are now vendored using Godep. [GH-1714]
+* Added support for `EnableTagOverride` for the catalog in the Go API client. [GH-1726]
+* Consul now ships built from Go 1.6. [GH-1735]
+* Added a new `/v1/agent/check/update/<check id>` API for updating TTL checks which
+  makes it easier to send large check output as part of a PUT body and not a query
+  parameter. [GH-1785].
+* Added a default set of `Accept` headers for HTTP checks. [GH-1819]
+* Added support for RHEL7/Systemd in Terraform example. [GH-1629]
+
 BUG FIXES:
 
-* Updated the internal web ui (`-ui` option) to latest released build, fixing
-  an ACL-related issue and the broken settings icon [GH-1619]
+* Updated the internal web UI (`-ui` option) to latest released build, fixing
+  an ACL-related issue and the broken settings icon. [GH-1619]
 * Fixed an issue where blocking KV reads could miss updates and return stale data
-  when another key whose name is a prefix of the watched key was updated [GH-1632]
+  when another key whose name is a prefix of the watched key was updated. [GH-1632]
+* Fixed the redirect from `/` to `/ui` when the internal web UI (`-ui` option) is
+  enabled. [GH-1713]
+* Updated memberlist to pull in a fix for leaking goroutines when performing TCP
+  fallback pings. This affected users with frequent UDP connectivity problems. [GH-1802]
+* Added a fix to trim UDP DNS responses so they don't exceed 512 bytes. [GH-1813]
+* Updated go-dockerclient to fix Docker health checks with Docker 1.10. [GH-1706]
 
 ## 0.6.3 (January 15, 2016)
 

GNUmakefile

@@ -1,55 +1,36 @@
 GOTOOLS = github.com/mitchellh/gox golang.org/x/tools/cmd/stringer \
 	github.com/jteeuwen/go-bindata/... github.com/elazarl/go-bindata-assetfs/...
-DEPS = $(shell go list -f '{{range .TestImports}}{{.}} {{end}}' ./...)
-PACKAGES = $(shell go list ./...)
+PACKAGES=$(shell go list ./... | grep -v '^github.com/hashicorp/consul/vendor/')
 VETARGS?=-asmdecl -atomic -bool -buildtags -copylocks -methods \
          -nilfunc -printf -rangeloops -shift -structtags -unsafeptr
 VERSION?=$(shell awk -F\" '/^const Version/ { print $$2; exit }' version.go)
 
-all: deps format
+# all builds binaries for all targets
+all: tools
 	@mkdir -p bin/
-	@bash --norc -i ./scripts/build.sh
-
-# bin generates the releasable binaries
-bin: generate
 	@sh -c "'$(CURDIR)/scripts/build.sh'"
 
 # dev creates binaries for testing locally - these are put into ./bin and $GOPATH
-dev: generate
+dev: format
 	@CONSUL_DEV=1 sh -c "'$(CURDIR)/scripts/build.sh'"
 
-# dist creates the binaries for distibution
-dist: bin
+# dist builds binaries for all platforms and packages them for distribution
+dist:
 	@sh -c "'$(CURDIR)/scripts/dist.sh' $(VERSION)"
 
 cov:
 	gocov test ./... | gocov-html > /tmp/coverage.html
 	open /tmp/coverage.html
 
-deps:
-	@echo "--> Installing build dependencies"
-	@go get -v $(GOTOOLS)
-	@go get -d -v ./... $(DEPS)
-
-updatedeps: deps
-	go get -u -v $(GOTOOLS)
-	go list ./... \
-		| xargs go list -f '{{join .Deps "\n"}}' \
-		| grep -v github.com/hashicorp/consul \
-		| grep -v '/internal/' \
-		| sort -u \
-		| xargs go get -f -u -v
-
-test: deps
+test: format
 	@$(MAKE) vet
 	@./scripts/verify_no_uuid.sh
 	@./scripts/test.sh
 
-cover: deps
-	./scripts/verify_no_uuid.sh
+cover:
 	go list ./... | xargs -n1 go test --cover
 
-format: deps
+format:
 	@echo "--> Running go fmt"
 	@go fmt $(PACKAGES)
 
@@ -58,28 +39,25 @@ vet:
 		go get golang.org/x/tools/cmd/vet; \
 	fi
 	@echo "--> Running go tool vet $(VETARGS) ."
-	@go tool vet $(VETARGS) . ; if [ $$? -eq 1 ]; then \
+	@go list ./... \
+		| grep -v ^github.com/hashicorp/consul/vendor/ \
+		| cut -d '/' -f 4- \
+		| xargs -n1 \
+			go tool vet $(VETARGS) ;\
+	if [ $$? -ne 0 ]; then \
 		echo ""; \
 		echo "Vet found suspicious constructs. Please check the reported constructs"; \
 		echo "and fix them if necessary before submitting the code for reviewal."; \
 	fi
 
-# generate runs `go generate` to build the dynamically generated source files
-generate: deps
-	find . -type f -name '.DS_Store' -delete
-	go generate ./...
-
-# generates the static web ui
-static-assets: deps
+# generates the static web ui that's compiled into the binary
+static-assets:
 	@echo "--> Generating static assets"
 	@go-bindata-assetfs -pkg agent -prefix pkg ./pkg/web_ui/...
 	@mv bindata_assetfs.go command/agent
 	$(MAKE) format
 
-web:
-	./scripts/website_run.sh
-
-web-push:
-	./scripts/website_push.sh
+tools:
+	go get -u -v $(GOTOOLS)
 
-.PHONY: all bin dev dist cov deps test vet web web-push generate test-nodep static-assets
+.PHONY: all bin dev dist cov test cover format vet static-assets tools