feat(snap): add off-cpu-threshold option (#3069)

Adds an `off-cpu-threshold` option to the Snap package, which defaults
to `0`.

Author: brancz

snap/hooks/configure

@@ -64,4 +64,10 @@ fi
 config_path="$(snapctl get config-path)"
 if [[ -z "$config_path" ]]; then
     snapctl set config-path=""
-fi
+fi
+
+# Set off-cpu threshold
+off_cpu_threshold="$(snapctl get off-cpu-threshold)"
+if [[ -z "$off_cpu_threshold" ]]; then
+    snapctl set off-cpu-threshold="0"
+fi

snap/local/parca-agent-wrapper

@@ -27,6 +27,7 @@ insecure="$(snapctl get remote-store-insecure)"
 token="$(snapctl get remote-store-bearer-token)"
 metadata_external_labels="$(snapctl get metadata-external-labels)"
 config_path="$(snapctl get config-path)"
+off_cpu_threshold="$(snapctl get off-cpu-threshold)"
 
 # Start building an array of command line options
 opts=(
@@ -37,6 +38,7 @@ opts=(
     "--remote-store-insecure=${insecure}"
     "--metadata-external-labels=${metadata_external_labels}"
     "--config-path=${config_path}"
+    "--off-cpu-threshold=${off_cpu_threshold}"
 )
 
 # If the token has been changed from empty, append it to the command line args
@@ -45,4 +47,4 @@ if [[ -n "${token}" ]]; then
 fi
 
 # Run parca-agent with the gathered arguments
-exec "${SNAP}/parca-agent" "${opts[@]}" 2>&1  | tee -a "$SNAP_COMMON/parca-agent.log"
+exec "${SNAP}/parca-agent" "${opts[@]}" 2>&1  | tee -a "$SNAP_COMMON/parca-agent.log"