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Automated rollback of CF
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fetch cloud_function | |
| metric 'cloudfunctions.googleapis.com/function/execution_count' | |
| { | |
filter status != 'ok' | |
; | |
ident | |
} | |
| group_by drop[status], sliding(5m), .sum | |
| ratio | |
| scale '%' | |
| every (30s) | |
| condition val() > 20'%' |
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package example | |
import ( | |
"fmt" | |
"net/http" | |
"github.com/GoogleCloudPlatform/functions-framework-go/functions" | |
) | |
func init() { | |
functions.HTTP("EventHandler", eventHandler) | |
} | |
// eventHandler always returns "pong" on "/ping" | |
// and returns 404 to other requests | |
func eventHandler(w http.ResponseWriter, | |
r *http.Request) { | |
if r.URL.Path != "/ping" { | |
http.NotFound(w, r) | |
return | |
} | |
fmt.Fprint(w, "pong") | |
} |
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package example | |
import ( | |
"net/http" | |
"github.com/GoogleCloudPlatform/functions-framework-go/functions" | |
) | |
func init() { | |
functions.HTTP("EventHandler", eventHandler) | |
} | |
// eventHandler fails on "/ping" with 500 | |
// and returns 404 to other requests | |
func eventHandler(w http.ResponseWriter, | |
r *http.Request) { | |
if r.URL.Path != "/ping" { | |
http.NotFound(w, r) | |
return | |
} | |
http.Error(w, "simulated error", http.StatusInternalServerError) | |
} |
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steps: | |
- name: 'gcr.io/cloud-builders/gcloud' | |
env: | |
- 'project_id=$PROJECT_ID' | |
- 'function_name=$_FUNCTION_NAME' | |
- 'function_region=$_FUNCTION_REGION' | |
script: | | |
#!/usr/bin/env bash | |
echo "Reading bucket and object for $function_name in $function_region ..." | |
read -r bucket object <<< $(gcloud functions describe "$function_name" --project="$project_id" --region="$function_region" --format="value(build_config.source.storage_source.bucket,build_config.source.storage_source.object)") | |
echo "Loading version for gs://$bucket/$object ..." | |
version=$(gcloud storage ls --all-versions "gs://$bucket/$object" --long | grep -v ^TOTAL | sort -r -k 2 | sed -n '2 p' | awk '{print $3}') | |
if [[ -n "$version" ]]; then | |
temp="gs://$bucket/temp.zip" | |
gcloud storage cp "$version" "$temp" | |
gcloud functions deploy "$function_name" --project="$project_id" --region="$function_region" --source="$temp" | |
gcloud storage rm "$temp" | |
else | |
echo "Cannot rollback to previous version. Only one version of the function was found." | |
fi |
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_FUNCTION_NAME=$(body.message.data.incident.resource.labels.function_name) | |
_FUNCTION_REGION=$(body.message.data.incident.resource.labels.region) |
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Cloud Build Settings Enable it to work with Cloud Fuctions |
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