It is important you set the storage class right at the time you deploy a server as this setting cannot be changed after you deploy. The storage classes you want your server to use. Indicate either -name or -n followed by a name whose length must not exceed 11 characters. The name of the server you want to deploy. To create an Azure Arc-enabled PostgreSQL server on your Arc data controller, you will use the command az postgres server-arc create to which you will pass several parameters.įor details about all the parameters you can set at the creation time, review the output of the command: az postgres server-arc create -help Create an Azure Arc-enabled PostgreSQL server Server-name is the name of the server you will create during the next step.įor more details on SCCs in OpenShift, refer to the OpenShift documentation. oc adm policy add-scc-to-user arc-data-scc -z -n The security context constraint (SCC) arc-data-scc is the one you added when you deployed the Azure Arc data controller. This command grants the necessary privileges to the service accounts that will run your PostgreSQL server. To deploy PostgreSQL server onto Red Hat OpenShift in a project other than the default, you need to execute the following commands against your cluster to update the security constraints. Implement this step before moving to the next step. Preliminary and temporary step for OpenShift users only If you prefer to try out things without provisioning a full environment yourself, get started quickly with Azure Arc Jumpstart on Azure Kubernetes Service (AKS), AWS Elastic Kubernetes Service (EKS), Google Cloud Kubernetes Engine (GKE) or in an Azure VM. Storage configuration and Kubernetes storage concepts.Overview of Azure Arc-enabled data services.There are important topics you may want read before you proceed with creation: If you are already familiar with the topics below, you may skip this paragraph. The latest updates are available in the release notes. Below we show a listing of objects in the database, first in the normal table mode and then with expanded mode turned on.As a preview feature, the technology presented in this article is subject to Supplemental Terms of Use for Microsoft Azure Previews. You can toggle expanded mode on and off by using the \x command. In this format you can page through results one at a time. In these cases, you can print the results in an “expanded” format which is essentially a crosstab of each row showing the column headings on the left and each value on the right. When terminal wrapping takes place, however, it can be challenging to figure out which data goes with which column. Normally, psql will do the hard work of formatting rows and columns of data in a monospaced font with the right amount of padding for everything to line up – within reason. One of the first helpful hints I learned early on with psql was that there are two modes for displaying both query and meta-command results. If there would be more than one match, psql will provide possible matches similar to a Linux terminal. If you want to list a table or connect to a different database, begin with the meta-command and then begin to type the object name and press TAB. For many commands, you can use the TAB key to trigger autocompletion or suggestion. If you don’t add a semicolon, psql will simply provide a new line for you to keep typing as shown below. In psql, you signal the end of a SQL statement by adding the semicolon and pressing enter. PostgreSQL adheres to the ANSI SQL standard which specifies the semicolon for statement termination. Knowing how to enable certain features or find help for each meta-command will go a long way in helping you to be a successful user of the tool. Any slash command ( \) is used to specify a meta-command that will typically run the necessary SQL queries in the background and return the results in a readable format.įirst, let’s look at a few tips about how psql works as a command line tool. The psql utility is packed with many helpful commands to help you explore and manage your database. To get the most value out of this content, you should have psql installed and connected to a PostgreSQL database so that you can try the commands as you read. From basic command syntax to the most common (and helpful) meta-commands, it’s all covered throughout the rest of the article. In this article we’ll get you up and running with all of the essential things you need to know to start on your journey to becoming a psql power-user. In our first article, we discussed the brief history of psql and demonstrated how to install it on your platform of choice and connect to a PostgreSQL database. Having access to the psql command-line tool is essential for any developers or DBAs that are actively working with and connecting to PostgreSQL databases.
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