Wiki.js on Google Cloud Run

Wiki.js is a powerful open-source wiki platform designed for teams that need modern, fast knowledge management with Git-backed version control and a clean writing experience. This module deploys Wiki.js on Cloud Run v2 on top of the App_CloudRun foundation, which provisions and manages the shared Google Cloud infrastructure.

This guide focuses on the cloud services Wiki.js uses and how to explore and operate them from the Google Cloud Console and the command line. For the mechanics common to every Cloud Run application — service identity, ingress and load balancing, scaling and concurrency, CI/CD, Cloud Armor, IAP, Binary Authorization, VPC Service Controls, backups, and the deployment lifecycle — refer to the App_CloudRun foundation guide rather than repeating them here.

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1. Overview

Wiki.js runs as a Node.js container on Cloud Run v2. The deployment wires together a focused set of Google Cloud services:

Capability	Google Cloud service	Notes
Compute	Cloud Run v2	Node.js service, 1 vCPU / 2 GiB by default, request-based autoscaling
Database	Cloud SQL for PostgreSQL 15	Required — Wiki.js uses PostgreSQL with the pg_trgm extension for full-text search
Shared files	Filestore (NFS)	Uploaded assets shared across all instances (mounted into the service)
Object storage	Cloud Storage	A dedicated wikijs-storage bucket, mountable via GCS Fuse at /wiki-storage
Cache (optional)	Redis	Disabled by default; enable for session caching
Secrets	Secret Manager	Auto-generated database password
Ingress	Cloud Run URL / Cloud Load Balancing	Default run.app URL, optional external HTTPS load balancer + custom domain

Sensible defaults worth knowing up front:

• PostgreSQL 15 is mandatory. Selecting MySQL or NONE breaks startup. The pg_trgm extension is installed automatically and is required for Wiki.js full-text search.
• Port 3000. Wiki.js binds to port 3000 (set by Wikijs_Common), not the conventional 80 or 8080.
• Gen2 execution environment is required for NFS mounts. Cloud Run gen2 is the default.
• Scale-to-zero by default. min_instance_count = 0 is the default — set to 1 for wikis that cannot tolerate 15–30 s cold starts.
• Asset storage path matters. HA_STORAGE_PATH=/wiki-storage tells Wiki.js where to write uploads. The NFS or GCS Fuse volume must be mounted at the same path.
• The database is bootstrapped on first deploy by a db-init job that creates the PostgreSQL user, database, and schema. The startup probe uses /healthz with a 60-second initial delay to allow this.

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2. Google Cloud Services & How to Explore Them

All commands assume PROJECT and REGION are set. Service and resource names are reported in the deployment Outputs.

A. Cloud Run — the Wiki.js service

Wiki.js runs as a Cloud Run v2 service that autoscales by request load between the minimum and maximum instance counts. Each deployment creates an immutable revision; traffic can be split across revisions for safe rollouts.

• Console: Cloud Run → select the service for revisions, traffic, logs, and metrics.
• CLI:

  gcloud run services list --project "$PROJECT" --region "$REGION"
  gcloud run services describe <service-name> --project "$PROJECT" --region "$REGION"
  gcloud run revisions list --service <service-name> --project "$PROJECT" --region "$REGION"

See App_CloudRun for scaling, concurrency, execution environment, and traffic splitting.

B. Cloud SQL for PostgreSQL 15

Wiki.js stores all application data (pages, users, navigation, search index) in a managed Cloud SQL for PostgreSQL 15 instance. The pg_trgm extension is installed at provisioning time and powers Wiki.js's native full-text search. The service connects privately through the Cloud SQL Auth Proxy over a Unix socket (no public IP). On first deploy an initialization Job creates the application database and user.

• Console: SQL → select the instance for connections, backups, flags, metrics.
• CLI:

  gcloud sql instances list --project "$PROJECT"
  gcloud sql instances describe <instance-name> --project "$PROJECT"
  gcloud sql connect <instance-name> --user=<db-user> --project "$PROJECT"

The instance name, database, user, and password secret are in the Outputs. See App_CloudRun for the connection model, backups, and password rotation.

C. Filestore (NFS) and Cloud Storage

Uploaded assets are written to a Filestore (NFS) share mounted into the service so all instances share the same files. A dedicated Cloud Storage bucket (wikijs-storage) is also provisioned for persistent asset storage; it can be mounted at /wiki-storage via GCS Fuse.

• Console: Filestore → Instances; Cloud Storage → Buckets.
• CLI:

  gcloud filestore instances list --project "$PROJECT"
  gcloud storage buckets list --project "$PROJECT"
  gcloud storage ls gs://<storage-bucket>/       # bucket name is in the Outputs

See App_CloudRun for the NFS mount, GCS Fuse, and CMEK.

D. Redis cache (optional)

Redis is disabled by default. When enabled, it provides session caching. Set enable_redis = true and supply redis_host to activate.

• Console: Memorystore → Redis (if using a managed instance).
• CLI:

  redis-cli -h <redis-host> ping
  redis-cli -h <redis-host> info keyspace

E. Secret Manager

The database password is stored in Secret Manager and injected into the service at runtime; plaintext never appears in configuration.

• Console: Security → Secret Manager.
• CLI:

  gcloud secrets list --project "$PROJECT"
  gcloud secrets versions access latest --secret=<secret-name> --project "$PROJECT"

See App_CloudRun for injection and rotation details.

F. Networking & ingress

The service is reachable at its run.app URL by default. An external HTTPS load balancer with a custom domain, Cloud CDN, and Cloud Armor can be layered on; ingress settings and VPC egress control connectivity.

• Console: Cloud Run (service URL); Network services → Load balancing.
• CLI:

  gcloud run services describe <service-name> --region "$REGION" --format='value(status.url)'
  gcloud compute addresses list --project "$PROJECT"

See App_CloudRun.

G. Cloud Logging & Monitoring

Container logs flow to Cloud Logging; Cloud Run and Cloud SQL metrics flow to Cloud Monitoring, with optional uptime checks and alert policies.

• Console: Logging → Logs Explorer; Monitoring → Dashboards / Alerting.
• CLI:

  gcloud run services logs read <service-name> --project "$PROJECT" --region "$REGION" --limit 50

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3. Wiki.js Application Behaviour

• First-deploy database setup. An initialization Job (db-init) uses the postgres:15-alpine image to connect through the Cloud SQL Auth Proxy, idempotently create the wikijs database and user, and grant the required privileges. The pg_trgm PostgreSQL extension is installed as part of the Wikijs_Common configuration. The job is safe to re-run.

• Schema migration on first start. Wiki.js connects to PostgreSQL on startup and runs its own internal schema migration. The startup probe carries a 60-second initial delay to allow this on first boot.

• Asset storage path. Wiki.js writes uploaded files to the path set by HA_STORAGE_PATH (default /wiki-storage). To persist assets across revisions, configure gcs_volumes to mount the wikijs-storage bucket at /wiki-storage. The NFS mount path and this variable must resolve to the same location.

• Health endpoint. Both the startup and liveness probes use /healthz, which returns HTTP 200 only once Wiki.js is running and connected to PostgreSQL. Do not replace this with / — the UI path is slow and may return errors during startup.

• Redis is optional. Wiki.js does not require Redis for core operation. Enable it when you want application-level session caching.

  Inspect the jobs and their executions:

  gcloud run jobs list --project "$PROJECT" --region "$REGION"
  gcloud run jobs executions list --job <job-name> --project "$PROJECT" --region "$REGION"

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4. Configuration Variables

Variables are grouped exactly as they appear on the deployment platform. Only settings specific to or notable for Wiki.js are listed; every other input is inherited from App_CloudRun with its standard behaviour.

Group 1 — Project & Identity

Variable	Default	Description
project_id	(required)	Target Google Cloud project.
region	us-central1	Region for the service and regional resources.

Group 2 — Deployment Environment

Variable	Default	Description
tenant_deployment_id	demo	Short suffix that makes resource names unique per environment.
support_users	[]	Emails granted project access and monitoring alerts.
resource_labels	{}	Labels applied to all resources.

Group 3 — Application Identity

Variable	Default	Description
application_name	wikijs	Base name for resources. Do not change after first deploy.
display_name	Wiki.js	Friendly name shown in the Console.
application_version	2.5.311	Wiki.js image version tag; increment to trigger a new revision.
db_name	wikijs	PostgreSQL database name. Immutable after first deploy; must match DB_NAME.
db_user	wikijs	PostgreSQL user. Immutable after first deploy; must match DB_USER.

Group 4 — Runtime & Scaling

Variable	Default	Description
deploy_application	true	Set false to provision infrastructure only.
cpu_limit	1000m	CPU per instance (1 vCPU).
memory_limit	2Gi	Memory per instance; minimum 1Gi for Node.js.
min_instance_count	0	Minimum instances — set 1 to eliminate cold starts.
max_instance_count	1	Maximum instances.
execution_environment	gen2	Gen2 required for NFS mounts.
timeout_seconds	300	Increase for large page exports or asset processing.
enable_cloudsql_volume	true	Cloud SQL Auth Proxy for Unix socket connections.
enable_image_mirroring	true	Mirror requarks/wiki:2 from Docker Hub into Artifact Registry.
traffic_split	[]	Split traffic across revisions for staged rollouts.
max_revisions_to_retain	7	How many old revisions to keep.

Group 5 — Access & Ingress Control

Variable	Default	Description
enable_iap	false	Require Google sign-in via Identity-Aware Proxy.
iap_authorized_users / iap_authorized_groups	[]	Who may access through IAP.
ingress_settings	all	Which networks may reach the service.
vpc_egress_setting	PRIVATE_RANGES_ONLY	How outbound traffic is routed through the VPC connector.

Group 6 — Environment Variables & Secrets

Variable	Default	Description
environment_variables	{ DB_TYPE="postgres", DB_PORT="5432", DB_USER="wikijs", DB_NAME="wikijs", DB_SSL="false", HA_STORAGE_PATH="/wiki-storage" }	Pre-populated with Wiki.js DB connectivity settings. Core values — do not remove.
secret_environment_variables	{}	Map of env var → Secret Manager secret name. DB_PASS is wired automatically.
secret_propagation_delay / secret_rotation_period	(set)	Replication wait / rotation cadence.

Group 7 — Backup & Restore

Variable	Default	Description
backup_schedule	0 2 * * *	Automated backup cron (UTC).
backup_retention_days	7	Retention; raise for production/compliance.
enable_backup_import / backup_source / backup_uri / backup_format	restore options	Restore from a backup on deploy.

Group 8 — CI/CD & Binary Authorization

Standard App_CloudRun Cloud Build / Cloud Deploy integration — see App_CloudRun. Key inputs: enable_cicd_trigger, github_repository_url, github_token, enable_cloud_deploy, enable_binary_authorization, binauthz_evaluation_mode.

Group 9 — NFS Instance & Custom SQL

Variable	Default	Description
nfs_instance_name / nfs_instance_base_name	(set)	Existing NFS instance / base name for an inline one.
enable_custom_sql_scripts / custom_sql_scripts_bucket / custom_sql_scripts_path / custom_sql_scripts_use_root	off	Run SQL from a GCS bucket after provisioning.

Group 10 — Domain, CDN, Cloud Armor & Image Retention

Variable	Default	Description
application_domains	[]	Custom hostnames for the external load balancer.
enable_cdn	false	Enable Cloud CDN on the LB backend.
enable_cloud_armor / admin_ip_ranges	off	Attach a WAF policy / restrict privileged access.
max_images_to_retain / delete_untagged_images / image_retention_days	(set)	Artifact Registry cleanup policy.

Group 11 — Storage & Filesystem

Variable	Default	Description
enable_nfs	true	Shared Filestore volume for Wiki.js assets.
nfs_mount_path	/mnt/nfs	Mount path inside the container — must align with HA_STORAGE_PATH.
create_cloud_storage / storage_buckets / gcs_volumes	(set)	Storage bucket / additional buckets / GCS Fuse mounts.
manage_storage_kms_iam / enable_artifact_registry_cmek	false	CMEK options.

Group 12 — Database Backend

Variable	Default	Description
database_type	POSTGRES_15	Fixed — do not change. Wiki.js requires PostgreSQL.
database_password_length	32	Generated password length (16–64).
enable_auto_password_rotation / rotation_propagation_delay_sec	off	DB password rotation.
db_host_env_var_name / db_name_env_var_name / db_user_env_var_name / db_port_env_var_name / service_url_env_var_name	(set)	Names under which connection details are injected.

Group 13 — Jobs & Scheduled Tasks

Variable	Default	Description
initialization_jobs	[]	Leave empty to use the built-in db-init job from Wikijs_Common.
cron_jobs	[]	Recurring Cloud Run jobs triggered by Cloud Scheduler.

Group 14 — Observability & Health

Variable	Default	Description
startup_probe	HTTP /healthz, 60 s initial delay	Startup probe — generous delay for first-boot DB migration.
liveness_probe	HTTP /healthz, 60 s initial delay	Liveness probe.
uptime_check_config	disabled, path /	Cloud Monitoring uptime check.
alert_policies	[]	Metric alert policies.

Group 21 — Redis Cache

Variable	Default	Description
enable_redis	false	Enable Redis for session caching (optional for Wiki.js).
redis_host	""	Redis endpoint — required when enable_redis = true.
redis_port	6379	Redis port.
redis_auth	""	Optional Redis auth password (sensitive).

Group 22 — VPC Service Controls & Audit Logging

Variable	Default	Description
enable_vpc_sc	false	Enforce a VPC-SC perimeter (requires organization_id).
vpc_cidr_ranges / vpc_sc_dry_run	(set)	Access level CIDRs / dry-run mode.
enable_audit_logging	false	Detailed Cloud Audit Logs.

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5. Outputs

Returned on a successful deployment — the quickest way to locate and explore the running resources.

Output	Description
service_name	Cloud Run service name.
service_url	Default run.app URL of the service.
service_location	Region the service runs in.
stage_services	Stage-specific service URLs (Cloud Deploy).
load_balancer_ip / load_balancer_url	External HTTPS load balancer IP / URL (when enabled).
database_instance_name	Cloud SQL instance name.
database_name / database_user	Application database name / user.
database_password_secret	Secret Manager secret holding the DB password.
database_host / database_port	DB endpoint / port.
storage_buckets	Created Cloud Storage buckets.
network_name / network_exists / regions	VPC network, presence, regions.
container_image / container_registry	Deployed image and Artifact Registry repo.
monitoring_enabled / monitoring_notification_channels / uptime_check_names	Monitoring status, channels, uptime checks.
initialization_jobs	Names of the setup jobs.
deployment_id / tenant_id / resource_prefix	Naming identifiers.
project_id / project_number	Project identifiers.
cicd_enabled / github_repository_url / github_repository_owner / github_repository_name / cicd_configuration	CI/CD status and details.
artifact_registry_repository / cloudbuild_trigger_name / cloudbuild_trigger_id	Registry and build trigger.
vpc_sc_enabled / vpc_sc_perimeter_name / vpc_sc_dry_run_mode	VPC-SC status.
audit_logging_enabled / artifact_registry_cmek_enabled	Audit logging and CMEK status.

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6. Configuration Pitfalls & Sensible Defaults

Risk: Critical (data loss / outage / security) — High (service degraded) — Medium (cost or partial degradation) — Low (minor).

Setting	Sensible value	Risk	Consequence if wrong
database_type	POSTGRES_15	Critical	Wiki.js requires PostgreSQL; MySQL/NONE breaks startup.
db_name / DB_NAME	both wikijs	Critical	Mismatch: db-init creates a different database than Wiki.js connects to — crash loop. Immutable after first deploy.
enable_cloudsql_volume	true	Critical	Disabling removes the Auth Proxy sidecar — all PostgreSQL connections fail.
enable_backup_import	false unless restoring	Critical	Enabling without a valid backup_uri fails the import job.
db_user / DB_USER	both wikijs	High	Mismatch: grants are for one user but Wiki.js authenticates as another — auth failure.
enable_nfs	true	High	Without shared storage, uploads written by one instance are invisible to others.
nfs_mount_path + HA_STORAGE_PATH	both /wiki-storage	High	If mount path and HA_STORAGE_PATH disagree, Wiki.js writes to ephemeral disk.
memory_limit	2Gi	High	Below 1Gi Wiki.js is OOM-killed on startup or under load.
startup_probe.initial_delay_seconds	60	High	Too low — Wiki.js is killed before first-boot schema migration completes.
min_instance_count	1	High	Scale-to-zero causes 15–30 s cold starts with failed in-flight requests.
gcs_volumes	mount at /wiki-storage	High	The wikijs-storage bucket is provisioned but not auto-mounted; without gcs_volumes, uploads go to ephemeral disk.
application_version	2.5.311	High	Wiki.js 2.x and 3.x have incompatible schemas. Test upgrades in staging.
enable_iap / ingress_settings	restrict for internal wikis	High	Default (all) exposes the Wiki.js login page to the public internet.
enable_redis	false unless needed	Low	Wiki.js does not require Redis for core operation.
backup_retention_days	7 (raise for prod)	Medium	Too short for compliance retention.

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For the foundation behaviour referenced throughout — service identity, scaling and concurrency, ingress and load balancing, CI/CD, Cloud Armor, IAP, Binary Authorization, VPC-SC, backups, and image mirroring — see App_CloudRun. Wiki.js-specific application configuration shared with the GKE variant is described in Wikijs_Common.