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PgHero Linux

Installation

Ubuntu

wget -qO- https://dl.packager.io/srv/pghero/pghero/key | sudo apt-key add -
sudo wget -O /etc/apt/sources.list.d/pghero.list \
  https://dl.packager.io/srv/pghero/pghero/master/installer/ubuntu/$(. /etc/os-release && echo $VERSION_ID).repo
sudo apt-get update
sudo apt-get -y install pghero

Supports Ubuntu 22.04 (Jammy), 20.04 (Focal), and 18.04 (Bionic)

Debian

sudo apt-get -y install apt-transport-https
wget -qO- https://dl.packager.io/srv/pghero/pghero/key | sudo apt-key add -
sudo wget -O /etc/apt/sources.list.d/pghero.list \
  https://dl.packager.io/srv/pghero/pghero/master/installer/debian/$(. /etc/os-release && echo $VERSION_ID).repo
sudo apt-get update
sudo apt-get -y install pghero

Supports Debian 11 (Bullseye) and 12 (Bookworm)

CentOS / RHEL

sudo wget -O /etc/yum.repos.d/pghero.repo \
  https://dl.packager.io/srv/pghero/pghero/master/installer/el/$(. /etc/os-release && echo $VERSION_ID).repo
sudo yum -y install pghero

Supports CentOS / RHEL 7

SUSE Linux Enterprise Server

sudo wget -O /etc/zypp/repos.d/pghero.repo \
  https://dl.packager.io/srv/pghero/pghero/master/installer/sles/12.repo
sudo zypper install pghero

Supports SUSE Linux Enterprise Server 12

Setup

Add your database. Use URL-encoding for any special characters in the username or password.

sudo pghero config:set DATABASE_URL=postgres://user:password@hostname:5432/dbname

Start the server

sudo pghero config:set PORT=3001
sudo pghero config:set RAILS_LOG_TO_STDOUT=disabled
sudo pghero scale web=1

Confirm it’s running with:

curl -v http://localhost:3001/

To open to the outside world, add a proxy. Here’s how to do it with Nginx on Ubuntu.

sudo apt-get install -y nginx
cat | sudo tee /etc/nginx/sites-available/default <<EOF
server {
  listen          80;
  server_name     "";
  location / {
    proxy_pass    http://localhost:3001;
  }
}
EOF
sudo service nginx restart

To run under a subpath, also set:

sudo pghero config:set RAILS_RELATIVE_URL_ROOT=my-path

Authentication

Add basic authentication with:

sudo pghero config:set PGHERO_USERNAME=link
sudo pghero config:set PGHERO_PASSWORD=hyrule

Or use a reverse proxy like OAuth2 Proxy, Amazon’s ALB Authentication, or Google’s Identity-Aware Proxy.

Management

sudo service pghero status
sudo service pghero start
sudo service pghero stop
sudo service pghero restart

View logs

sudo pghero logs

Query Stats

Query stats can be enabled from the dashboard. If you run into issues, view the guide.

Historical Query Stats

To track query stats over time, create a table to store them.

CREATE TABLE "pghero_query_stats" (
  "id" bigserial primary key,
  "database" text,
  "user" text,
  "query" text,
  "query_hash" bigint,
  "total_time" float,
  "calls" bigint,
  "captured_at" timestamp
);
CREATE INDEX ON "pghero_query_stats" ("database", "captured_at");

This table can be in the current database or another database. If another database, run:

sudo pghero config:set PGHERO_STATS_DATABASE_URL=...

Schedule the task below to run every 5 minutes.

sudo pghero run rake pghero:capture_query_stats

After this, a time range slider will appear on the Queries tab.

The query stats table can grow large over time. Remove old stats with:

sudo pghero run rake pghero:clean_query_stats

Historical Space Stats

To track space stats over time, create a table to store them.

CREATE TABLE "pghero_space_stats" (
  "id" bigserial primary key,
  "database" text,
  "schema" text,
  "relation" text,
  "size" bigint,
  "captured_at" timestamp
);
CREATE INDEX ON "pghero_space_stats" ("database", "captured_at");

Schedule the task below to run once a day.

sudo pghero run rake pghero:capture_space_stats

System Stats

CPU usage, IOPS, and other stats are available for:

Heroku and Digital Ocean do not currently have an API for database metrics.

Amazon RDS

Add these variables to your environment:

sudo pghero config:set AWS_ACCESS_KEY_ID=my-access-key
sudo pghero config:set AWS_SECRET_ACCESS_KEY=my-secret
sudo pghero config:set AWS_REGION=us-east-1
sudo pghero config:set PGHERO_DB_INSTANCE_IDENTIFIER=my-instance

This requires the following IAM policy:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": "cloudwatch:GetMetricStatistics",
            "Resource": "*"
        }
    ]
}

Google Cloud SQL

Add these variables to your environment:

sudo pghero config:set GOOGLE_APPLICATION_CREDENTIALS=path/to/credentials.json
sudo pghero config:set PGHERO_GCP_DATABASE_ID=my-project:my-instance

This requires the Monitoring Viewer role.

Azure Database

Get your credentials and add these variables to your environment:

AZURE_TENANT_ID=...
AZURE_CLIENT_ID=...
AZURE_CLIENT_SECRET=...
AZURE_SUBSCRIPTION_ID=...

Finally, set your database resource URI:

PGHERO_AZURE_RESOURCE_ID=/subscriptions/<subscription-id>/resourceGroups/<resource-group>/providers/Microsoft.DBforPostgreSQL/servers/<database-id>

This requires the Monitoring Reader role.

Multiple Databases

Create a pghero.yml with:

databases:
  primary:
    url: postgres://...
  replica:
    url: postgres://...

More information about connection parameters

And run:

cat pghero.yml | sudo pghero run sh -c "cat > config/pghero.yml"
sudo service pghero restart

With Postgres < 12, if multiple databases are in the same instance and use historical query stats, PgHero should be configured to capture them together.

databases:
  primary:
    url: ...
  other:
    url: ...
    capture_query_stats: primary

Permissions

We recommend setting up a dedicated user for PgHero.

Customize

Minimum time for long running queries

sudo pghero config:set PGHERO_LONG_RUNNING_QUERY_SEC=60 # default

Minimum average time for slow queries

sudo pghero config:set PGHERO_SLOW_QUERY_MS=20 # default

Minimum calls for slow queries

sudo pghero config:set PGHERO_SLOW_QUERY_CALLS=100 # default

Minimum connections for high connections warning

sudo pghero config:set PGHERO_TOTAL_CONNECTIONS_THRESHOLD=500 # default

Statement timeout for explain

sudo pghero config:set PGHERO_EXPLAIN_TIMEOUT_SEC=10 # default

Visualize URL for explain

sudo pghero config:set PGHERO_VISUALIZE_URL=https://...

Upgrading

Ubuntu and Debian

sudo apt-get update
sudo apt-get install --only-upgrade pghero
sudo service pghero restart

CentOS and RHEL

sudo yum update
sudo yum install pghero
sudo service pghero restart

SUSE

sudo zypper update pghero
sudo service pghero restart

Credits

❤️ Made possible by Packager