feat: config reload (#887)

Co-authored-by: Moritz Wiesinger <[email protected]>

Author: tim-goto

.chloggen/config-reload.yaml

@@ -0,0 +1,25 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: service
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Add service reload signal to systemd unit
+
+# One or more tracking issues or pull requests related to the change
+issues: [887]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [user]

distributions/otelcol-contrib/otelcol-contrib.service

@@ -5,6 +5,7 @@ After=network.target
 [Service]
 EnvironmentFile=/etc/otelcol-contrib/otelcol-contrib.conf
 ExecStart=/usr/bin/otelcol-contrib $OTELCOL_OPTIONS
+ExecReload=/bin/kill -HUP $MAINPID
 KillMode=mixed
 Restart=on-failure
 Type=simple

distributions/otelcol-otlp/otelcol-otlp.service

@@ -5,6 +5,7 @@ After=network.target
 [Service]
 EnvironmentFile=/etc/otelcol-otlp/otelcol-otlp.conf
 ExecStart=/usr/bin/otelcol-otlp $OTELCOL_OPTIONS
+ExecReload=/bin/kill -HUP $MAINPID
 KillMode=mixed
 Restart=on-failure
 Type=simple

distributions/otelcol/otelcol.service

@@ -5,6 +5,7 @@ After=network.target
 [Service]
 EnvironmentFile=/etc/otelcol/otelcol.conf
 ExecStart=/usr/bin/otelcol $OTELCOL_OPTIONS
+ExecReload=/bin/kill -HUP $MAINPID
 KillMode=mixed
 Restart=on-failure
 Type=simple