patroni | A template for PostgreSQL High Availability with Etcd | Key Value Database library
kandi X-RAY | patroni Summary
kandi X-RAY | patroni Summary
A template for PostgreSQL High Availability with Etcd, Consul, ZooKeeper, or Kubernetes
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Top functions reviewed by kandi - BETA
- Run periodic cycle .
- Build the environment configuration .
- Check if wal - e is used to create a replicas .
- Execute a failover or switch over master .
- Return the metrics for the patroni
- Creates a replica in the replication process .
- Get an eCD client .
- Start the PostgreSQL server .
- Check if we have a recovery configuration .
- Returns a list of slots that are assigned to this leader .
patroni Key Features
patroni Examples and Code Snippets
Lines of Code : 27
License : No License
Copyssh-keygen -t rsa -b 4096 -C "your_email@domain.com"
ssh-copy-id root@server_ip_address
sudo systemctl daemon-reload
sudo systemctl start patroni.service
sudo systemctl enable patroni.service
[root@pg-patroni1 vagrant]# sudo patronictl -c /opt/app/ # connect to primary
psql postgres://dbuser_test:dbuser_test@primary.testdb.service.consul:5432/testdb
# conntect to standby (random choose one)
psql postgres://dbuser_test:dbuser_test@standby.testdb.service.consul:5432/testdb
# haproxy primary ser debian:buster-slim
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python:3.8-slim-buster
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perrygeo/gdal-base:latest
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perrygeo/postgres:latest
POSTGRES_VERSION 12.2
PROTOBUF_VERSION 3.6.1
PROTOBUF_C_VERSION 1.3.1
POSTGIS_VERSION 3.1.0alpha
# TIMESCALE Community Discussions
Trending Discussions on patroni
QUESTION
I have a PostgreSQL Kubernetes Service based on Patroni/Spilo. This Kubernetes service deploys a cluster of three PostgreSQL pods + three Etcd pods. During maintenance, I had a failure and I wasn't able to restore the old configuration that worked fine before the rolling update.
I searched for documentation and it seems StatefulSets doesn't support rollbacks as deployment. I found this thread that references this doc.
To be honest, however, I didn't understand how to proceed.
My cluster has the following pods:
...ANSWER
Answered 2021-Dec-14 at 13:42To undo changes that have been made, first checkout the rollout history kubectl rollout history sts -n .
Get more details about a revision kubectl rollout history sts --revision -n .
Undo the changes kubectl rollout undo sts --to-revision -n
QUESTION
I am using Kustomize to manage multiple variations of the same cluster. I am using nameSuffix option to add a suffix to all my resources:
ANSWER
Answered 2021-Nov-09 at 13:12Skipping selected kinds doesn't work because this feature wasn't implemented - from this comment on GitHub issue 519.
Also this is an example how it was supposed to be (what you tried)
Based on this comment, it works on kinds that were explicitly mentioned:
The plugin's config is currently oriented towards specifying which kinds to modify, ignoring others.
Also based on some tests I performed, it looks for kinds only, it doesn't look for names or anything, so only the whole kind can be included. Hence second part of your question is I'm afraid not possible (well, using kustomize, you can use sed for instance and modify everything you need on the go).
I created a simple structure and tested it:
QUESTION
I was searching an entire day to add some categories from a JSON file using React hooks, with no luck so far. I am hoping that anyone can help me with this. Here is how the JSON it looks:
...ANSWER
Answered 2021-Nov-03 at 10:12It looks like you don't need a state. You could move categories out your component (because json is not going to change and doesn't depend on anything) and just use this variable to iterate by.
QUESTION
I have the following Kubernetes YAML with a StatefulSet I use to deploy a PostgreSQL cluster with Patroni. However, the question is relative to how Kubernetes registers Pod names in CoreDNS.
According to this documentation in the Stable Network ID section if I create a Headless service called spilodemo-svc for my Pods I can access them using the short hostname (podname.servicename):
ANSWER
Answered 2021-Oct-27 at 11:14After almost three days of tests, I found a solution. The solution depends on two things:
- how Kubernetes works;
- how Patroni works.
How Kubernetes Works
When you create a StatefulSet deployment (but this is true also for Deployment), let's say with 3 pods, Kubernetes register in CoreDNS three DNS names:
QUESTION
I have a PostgreSQL cluster with three nodes with Patroni. The cluster manages a very high workload and for this reason, it runs in production on bare metal machines. We need to migrate this infrastructure to Kubernetes (for several reasons) and I am doing some performance tests executed with PgBench. First I compared Baremetal vs Virtual Machine and I got very small degradation. Then I compared VSI vs Kubernetes to understand the overhead added by K8s.
Now I am trying to fine-tune CPU and memory. K8s runs on Worker nodes with 48 vCPU and 192 Gb. However, once PostgreSQL was deployed I still see:
...ANSWER
Answered 2021-Jun-28 at 22:53this is a great question and it also took me some time earlier this year to find out by experience.
It is important to understand that request have no actual effect on the resource usage of containers. You can check by connecting to your Server and running htop or kubectl top like you did, and you see that even though you defined requests: memory: 64Gi only 244Mi are used.
The main purpose of requests is to influence scheduling behavior. When the Kubernetes Scheduler looks for a fitting Node to place a new Pod on it, it checks for the currently requested CPU and Memory of the Nodes. You can check current status of nodes yourself by running the following command.
QUESTION
I have a PostgreSQL cluster on Patroni (Haproxy+Keepalived+etcd) - one primary node and two standby nodes.
For now, Haproxy is configured in this way:
- port
5000to connect to the primary node - port
5001to connect to the standby nodes
How can I configure Haproxy so that the port 5001 is used to connect to the standby nodes as well as the primary node?
This is my haproxy.cfg below:
ANSWER
Answered 2021-May-19 at 18:38In a patroni documentation I found the /health endpoint patroni rest-api:
returns HTTP status code 200 only when PostgreSQL is up and running.
I tried to use that endpoint in haproxy configuration, and it works like expected, patroni give all 3 nodes when all nodes alive, and don't give nodes that aren't in running state
So, if you want to add all nodes to haproxy balance, create a new backend in haproxy.conf
QUESTION
I have Postgres HA solution using streaming replication and managed by Patroni. I would like to also add logical replication. In case of a failover from master to the slave, do I need to rebuild the logical replication from scratch, or the Failover Slots solution discussed by Craig Ringer was implemented in Postgres 13.
...ANSWER
Answered 2021-Apr-08 at 12:20Replication slots only exist on the primary, and there is no high availability solution for them. You will have to rebuild the logical standby after a failover.
QUESTION
I making a POC, in my test I killed the primary node, other node take the primary role, the new replica rewind.... but dead whit this messages:
...ANSWER
Answered 2021-Mar-15 at 22:53After go inside the docker, exec a patronictl -c ... reinit, wait and your node will be online again....❗
QUESTION
I am trying to set up Patroni (2.0.1) for the first time with PG12.
Even though the authentication users specified in the config exist in PG (with correct passwords), PG keeps on rejecting the connection.
This is my config -
...ANSWER
Answered 2020-Oct-08 at 02:33I'd say that your pg_hba.conf is too restrictive. Use something like
QUESTION
I just tried to install timescaleDB Single with Helm in minikube on Ubuntu 20.04.
After installing via:
helm install timescaledb timescaledb/timescaledb-single --namespace espace-client-v2
I got the message:
...ANSWER
Answered 2020-Aug-10 at 08:54I could do it. If the page https://github.com/timescale/timescaledb-kubernetes doesn't give much details about installation process, you can go here:
https://github.com/timescale/timescaledb-kubernetes/tree/master/charts/timescaledb-single
I had to use kustomize to generate content:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install patroni
You can use patroni like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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