prepare for 0.4.0 release (#123)

CHANGELOG.md

@@ -1,5 +1,36 @@
 # Next (master/unreleased)
 
+# v0.4.0 (2020-06-18)
+
+- [FEATURE] Support for integrations has been added. Integrations can be any
+  embedded tool, but are currently used for embedding exporters and generating
+  scrape configs. (@rfratto)
+
+- [FEATURE] node_exporter has been added as an integration. This is the full
+  version of node_exporter with the same configuration options. (@rfratto)
+
+- [FEATURE] An Agent integration that makes the Agent automatically scrape
+  itself has been added. (@rfratto)
+
+- [ENHANCEMENT] The WAL can now be truncated if running the Agent without any
+  remote_write endpoints. (@rfratto)
+
+- [ENHANCEMENT] Clarify server_config description in documentation. (@rfratto)
+
+- [ENHANCEMENT] Clarify wal_truncate_frequency and remote_flush_deadline in
+  documentation. (@rfratto)
+
+- [ENHANCEMENT] Document /agent/api/v1/instances endpoint (@rfratto)
+
+- [ENHANCEMENT] Be explicit about envsubst requirement for Kubernetes install
+  script. (@robx)
+
+- [BUGFIX] Prevent the Agent from crashing when a global Prometheus config
+  stanza is not provided. (@robx)
+
+- [BUGFIX] Enable agent host_filter in the Tanka configs, which was disabled by
+  default by mistake. (@rfratto)
+
 # v0.3.2 (2020-05-29)
 
 - [FEATURE] Tanka configs that deploy the scraping service mode are now

docs/configuration-reference.md

@@ -1482,7 +1482,7 @@ docker run \
   -v "/:/host:ro,rslave" \
   -v /tmp/agent:/etc/agent \
   -v /path/to/config.yaml:/etc/agent-config/agent.yaml \
-  grafana/agent:v0.3.2 \
+  grafana/agent:v0.4.0 \
   --config.file=/etc/agent-config/agent.yaml \
   --integrations.node_exporter.rootfs-path=/host
 ```
@@ -1497,7 +1497,7 @@ metadata:
   name: agent 
 spec:
   containers:
-  - image: grafana/agent:v0.3.2
+  - image: grafana/agent:v0.4.0
     name: agent 
     args:
     - --config.file=/etc/agent-config/agent.yaml 

docs/getting-started.md

@@ -46,7 +46,7 @@ Currently, there are five ways to install the agent:
 ### Docker Container
 
 ```
-docker pull grafana/agent:v0.3.2
+docker pull grafana/agent:v0.4.0
 ```
 
 ### Kubernetes Install Script
@@ -57,7 +57,7 @@ Grafana Cloud Agent Kubernetes deployment manifest (requires `envsubst` (GNU get
 > **Warning**: Always verify scripts from the internet before running them.
 
 ```
-/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/grafana/agent/v0.3.2/production/kubernetes/install.sh)" | kubectl apply -f -
+/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/grafana/agent/v0.4.0/production/kubernetes/install.sh)" | kubectl apply -f -
 ```
 
 ### Kubernetes Manifest
@@ -186,7 +186,7 @@ path of your Agent's YAML configuration file.
 docker run \
   -v /tmp/agent:/etc/agent \
   -v /path/to/config.yaml:/etc/agent-config/agent.yaml \
-  grafana/agent:v0.3.2
+  grafana/agent:v0.4.0
 ```
 
 ### Locally

production/README.md

@@ -35,7 +35,7 @@ docker run \
   -v /tmp/agent:/etc/agent \
   -v /path/to/config.yaml:/etc/agent-config/agent.yaml \
   --entrypoint "/bin/agent -config.file=/etc/agent-config/agent.yaml -prometheus.wal-directory=/etc/agent/data"
-  grafana/agent:v0.3.2
+  grafana/agent:v0.4.0
 ```
 
 ## Running the Agent locally

production/kubernetes/README.md

@@ -18,7 +18,7 @@ Here's a one-line script to copy and paste to install the Agent on
 Kubernetes (requires `envsubst` (GNU gettext)):
 
 ```
-/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/grafana/agent/v0.3.2/production/kubernetes/install.sh)" | kubectl apply -f -
+/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/grafana/agent/v0.4.0/production/kubernetes/install.sh)" | kubectl apply -f -
 ```
 
 ## Manually Applying

production/kubernetes/install.sh

@@ -31,7 +31,7 @@ check_installed() {
 check_installed curl
 check_installed envsubst
 
-MANIFEST_BRANCH=v0.3.2
+MANIFEST_BRANCH=v0.4.0
 MANIFEST_URL=${MANIFEST_URL:-https://raw.githubusercontent.com/grafana/agent/${MANIFEST_BRANCH}/production/kubernetes/agent.yaml}
 
 REMOTE_WRITE_USERNAME_SET=0