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Questions tagged [healthcheck]

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How to implement an active health check with web load balancer

I need to have a web load balancer with active health check. This frontend machine should handle https certificate, a bit of caching and, most important, proxy to backend server only if they are ...
Tobia's user avatar
  • 1,340
0 votes
0 answers
242 views

Readiness probe warning: Probe terminated redirects, Response body:

an HTTP healthcheck with Healthcheck. As you can see, it is redirected to the outside. root@wordpress-848c85d8d6-8cb15:/# curl HTTP/1.1 301 Moved Permanently http://10.42.3.26 -I Server: nginx Date: ...
콜라맛홍삼's user avatar
2 votes
0 answers
291 views

Safest way to configure `max_fails` in Nginx reverse proxy

We have nginx as a reverse proxy, load balancing across 2 application servers. These application servers were defined in upstream blocks like so: upstream app_backends { server 1.1.1.1:...
Robin Winslow's user avatar
1 vote
0 answers
175 views

HEALTH CHECK not resolving for ClamAV hosted in GKE cluster

Couldn't resolve health check related issue for the clamAV:1.2 deployment hosted in the GKE cluster in the port 3310, 7357. Facing some backend services are in UNHEALTHY state, in the ingress after ...
Vikram R's user avatar
0 votes
0 answers
79 views

ALB: Should load-balance health-checks retry on failure?

We have some AWS ECS-based Fargate-hosted tasks/services running behind many ALBs. We seem to frequently get not-meaningful alerts from our own monitoring in our health-checks. It happens every twenty ...
Dustin Oprea's user avatar
0 votes
0 answers
37 views

Gravitee 3.20 healthcheck locations

Maybe someone had a similar issue with healthchecking gravitee helm deployment - cannot find any endpoinds for the healthchecks. I had asked chatgpt and found documentation for it, but neither ...
kcziuy's user avatar
  • 1
0 votes
1 answer
569 views

Can't set up the GCP's external load balancer to work correctly with Terraform

Using Terraform, I want to build an infrastructure that consists of an external load balancer (LB) and a MIG with 3 VMs. Each VM within the MIG should run a server that listens on 80. Furthermore, I ...
mångata's user avatar
  • 109
2 votes
0 answers
1k views

Instance refresh: "insufficient data to evaluate its health with Amazon EC2"

The instance refreshes for my autoscaling group are taking a very long time due to instances having "insufficient data to evaluate its health with Amazon EC2." However, the instances are ...
Paul Draper's user avatar
1 vote
0 answers
388 views

How can I make sure that AWS does not kill tasks before auto scaling kicks in?

I work on an AWS Fargate service which has a health check configured as well as an autoscaling policy set. The application needs about 30 - 45 seconds to start. The application does receive traffic ...
sbrattla's user avatar
  • 1,630
1 vote
1 answer
131 views

Programmatically (SH Script) check which server is traffic routed/up too by HA Proxy

I have 2 HA Proxy servers with Keepalived configured with them, and have 2 backend servers to which traffic is routed by HA Proxy, am writing a shell script that will sync a directory between backend ...
MoonLight's user avatar
  • 111
2 votes
1 answer
2k views

How to perform healthcheck on NFS clients connectivity from the NFS-Server?

I have three Debian 11 servers let's call them nfs-server which is the NFS server, nfs1, and nfs2 which are the NFS clients. I want to perform some sort of health check from the NFS server to ensure ...
Sinux's user avatar
  • 95
0 votes
1 answer
292 views

Apache httpd: mod_proxy_hcheck URL based HTTP basic authentication

I am trying to use mode_proxy_hcheck to do health checks and failover for an application that requires HTTP Basic authentication. <proxy balancer://serverpool> BalancerMember http://username:...
theeGwandaru's user avatar
2 votes
2 answers
2k views

AWS NLB HTTPs health check using mTLS

Is it possible to do a AWS NLB HTTPs health check using mTLS? I tried setting up a TLS listener, loaded my cert, setup a TLS target group with HTTPs health check, but the health checks are still ...
RustyShackleford's user avatar
0 votes
1 answer
859 views

Keepalived: Transitioning to backup node not happening when check script on master server finds service is down for an applicaiton

I am trying to configure keepalived in such a way that if any application or service running on master node fails, keepalived should consider it as fault and backup node should act as master and take ...
Muhammad Munir's user avatar
1 vote
1 answer
2k views

ECS restarts due to health_check failure when multiple other requests are slow to return

We noticed that our ECS Fargate backend services restart due to a health check response timeout: (service our-site-com-stack-BackendApiServiceStack...) (port 8000) is unhealthy in (target-group arn:...
Zev's user avatar
  • 111
0 votes
2 answers
375 views

docker health check for disk space not working as intended

I've got an nginx container which ends up with a full disk after it's been running for about 10 days. So if a new version of the app isn't released, errors start to occur that look like; 2022/01/15 22:...
markwalker_'s user avatar
0 votes
0 answers
188 views

How to health check a distributed NAT gateway?

I am using Google Cloud Platform and have manually setup a NAT gateway to peer two networks A and B so that workloads in network A have a default gateway which routes packets into network B. The ...
dippynark's user avatar
  • 242
5 votes
2 answers
4k views

Health Tests on NVMe

On the servers I have, with HDD or SSD, I have a cron that periodically runs: /usr/sbin/smartctl --test=short/long /dev/sd1 (for each disk) While it runs, it just looks at the output of /usr/sbin/...
Nuno's user avatar
  • 643
0 votes
1 answer
52 views

Is there any monitoring tools to create scenarios/dependencies check? [closed]

My team and I got the project to test a new monitoring solution that allow us to : Perform classical monitoring checks (through SNMP, ping, sensor status, vendor librairies etc...) Perform checks in ...
motorbass's user avatar
  • 363
0 votes
2 answers
1k views

Google cloud loadbalancer health checks cause a load on servers

I have configured a load balancer https on google cloud with a health check having following parameters: healthcheck : Interval : 30 seconds Timeout : 15 seconds Healthy threshold: 1 success ...
Julie's user avatar
  • 101
0 votes
1 answer
243 views

Using SSH in check of Consul

I have a server with a dockerized Consul Agent (CA). In this CA, I want to run a script from the host who checks how many disk space left in a service check. For this, I created a service in the CA : {...
M4kn4sh's user avatar
  • 121
0 votes
1 answer
3k views

Ceph Cluster - Reduced data availability: 96 pgs inactive And All OSD Nodes Are Down

I set up my Ceph Cluster by following this document. I have one Manager Node, one Monitor Node, and three OSD Nodes. The problem is that right after I finished setting up the cluster, the ceph health ...
Shaghayegh Tavakoli's user avatar
0 votes
2 answers
290 views

How to stop requests on PHP server while it is running cron job sheduled PHP script?

I have a situation when some DDOS attacks are putting my PHP server down. Occasionally. I'm using AWS with auto scaling groups, so it is not a problem. The problems start when this server is going ...
Yevgeniy Afanasyev's user avatar
-2 votes
1 answer
140 views

Is there an online service for checking the health of online services? [closed]

I have a web service in Amazon WS on port 443. Is there an online service that can monitor my service and email me if, for example, https://myservice.org returns an error?
QLands's user avatar
  • 119
0 votes
0 answers
300 views

Implementing Health Check for Websites Hosted Behind a Shared LB

we host 4 web servers behind a shared load balancer. We don't have control over this Citrix NetScaler load balancer. We submit tickets to make changes as needed. Recently, one of the web servers ...
Ismet D.'s user avatar
0 votes
0 answers
36 views

Check health of my system such as database connections, mainframe connections, messaging services etc

I am so new to this topic that I am not even sure I am asking it correctly but I will give my best. We have number of applications talking to databases such as Oracle and Mainframe and uses messaging ...
dbnex14's user avatar
  • 101
1 vote
1 answer
65 views

AWS autoscaling and ELB, use different health checking mechanism

I need some advice about AWS autoscaling, loadbalancers and health checks: is it possible to distinguish two health checking mechanism, one is when to send or do not send traffic to an instance (but ...
zsolt.k's user avatar
  • 113
0 votes
1 answer
94 views

Proxy HTTPS requests internally to the internet

Due to security reasons, one of our hosts HOST-B doesn't have a connection to the internet. But I need to set up HTTPS traffic to healthchecks.io to monitor cron jobs. All incoming traffic is proxied ...
aardbol's user avatar
  • 1,483
1 vote
1 answer
1k views

GCP HTTPS LB health check is working but no real traffic getting in, what could explain this?

If the health check is working and the backend service is marked as green (i.e. I do have a firewall rule for the LB hc/traffic), would could explain that no real traffic can get in (I'm getting a 502 ...
Rhangaun's user avatar
  • 199
0 votes
1 answer
200 views

Creating memory check via nagios core

How to check memory and incoming/outgoing connections of host. I have created memory usage i am getting error as below. Name of service:Memory Usage Status:UNKNOWN Last Check:03-13-2020 04:05:45 ...
GauravG's user avatar
  • 19
1 vote
1 answer
273 views

Managed instance group autohealing without external IP

I can not seem to find any information on this topic, auto-healing health checks is performed by instances in a google external IP range of 130.211.0.0/22, 35.191.0.0/16. I'm using a Cloud NAT setup ...
JazzCat's user avatar
  • 169
3 votes
1 answer
1k views

How do I exclude health checks from Google Cloud Stackdriver traces

I'm running my app in Google Kubernetes Engine, and the Stackdriver Traces are very useful to determine the health and speed of my app. However the large majority of request coming into my app are ...
Toby 1 Kenobi's user avatar
0 votes
1 answer
95 views

App Engine health check not working

This is my app.yaml runtime: go112 instance_class: B1 manual_scaling: instances: 1 liveness_check: path: "/health" check_interval_sec: 5 timeout_sec: 1 failure_threshold: 1 ...
Jonas's user avatar
  • 347
0 votes
1 answer
816 views

How to get loadbalancer reach instance's local service at 8080, AWS

A very green networking person here; working in the AWS environment, and have the following: EC2 instance up and running; I AWS Classic loadbalancer (I guess ELB) up and running; LB LB includes I LB ...
Lars Andren's user avatar
0 votes
1 answer
926 views

Does Readiness check keep running after a pod has been marked unready?

My understanding is that after waiting for 45 seconds, Kubernetes is going to hit /heartbeat and wait for the response for 5 seconds. If it doesn't get the response, it is going to try 5 times(every ...
dev_in_prog's user avatar
4 votes
1 answer
2k views

How to configure an AWS ECS health check for a non web app container

I understand that usually for web app containers there needs to be an HTTP endpoint which responds with 200 for a succesful healthcheck. However, in my case I would have a non web app (a python ...
Khrysmb's user avatar
  • 41
-1 votes
1 answer
116 views

Is there a way to setup ping check for remote host in Azure? [closed]

I'm trying to find a way in Azure to setup some service to be able to do ping check on remote host not hosted in Azure and alert when it is not reachable. For example On-Premises server with PIP.
Vardges Stepanyan's user avatar
3 votes
1 answer
11k views

AWS Elastic Load Balancer and target group health check fail for no apparent reason

I have completed my AWS ELB architecture for our website and successfully created the Launch Configuration and Target Groups for which instances are created behind the Load Balancer. My configuration ...
wlarcheveque's user avatar
1 vote
2 answers
741 views

How to avoid duplicate health-check for the real same server in Haproxy?

Following config file work as expect but do duplicate health-check for the real same proxy-server, how can I avoid such duplicate health-check? (I still want do health-check but not duplicate health-...
illiterate's user avatar
1 vote
1 answer
743 views

HTTP Health Check For Elastic Beanstalk App Triggers Scale / Capacity rules

I have an Elastic Beanstalk application that is running a wordpress application, and I would like some monitoring and scaling triggers for when the health check, the homepage, returns an HTTP response ...
robskrob's user avatar
  • 111
5 votes
2 answers
4k views

Verify internal NTP server is sending the correct time?

I have two NTP stratum 3 servers running and wanted to create a simple check that I could tell if either of the servers time drifted and alert that it's not synced properly with the public stratum 2 ...
krizzo's user avatar
  • 387
0 votes
1 answer
1k views

Veeam target | How to detect CRC errors in time?

A custumer uses Veeam and a NAS as primary backup target. The backups for last days were performed without any errors. Now they cannot restore due to CRC errors. Obviously, the writing to the NAS ...
marsh-wiggle's user avatar
  • 2,195
1 vote
0 answers
464 views

How are load balancers, health checks, and autoscalers supposed to handle surges?

I have a service which looks like: Internet -> Load Balancer -> Instances What seems to be happening in my service is the following scenario: A large surge of user traffic comes in, more than the ...
Kevin Baragona's user avatar
1 vote
1 answer
4k views

What happens when a pod fails for readiness health check?

I was tracking down an unknown timeout problem in our cluster and found something interesting. We currently have 30 pods for a service. When I run kubectl get event Those 30 pods have been failing ...
Moon's user avatar
  • 2,173
2 votes
0 answers
252 views

Elastic Beanstalk environment and security group config for ELB health checker?

I have an Elastic Beanstalk environment that I can't get Health Checks to work on. Here's my Elastic Beanstalk's Load Balancer configuration: My healthcheck URL is /status/ My EC2 security group (...
Dustfinger's user avatar
3 votes
1 answer
11k views

Apache load balancer: health check with long timeout

I'm using Apache HTTP Server as a reverse proxy for a couple of Tomcat instances. I've setup load balancing as follows: <Proxy "balancer://tomcat-app"> BalancerMember "http://10.0.0.1:8080" ...
simlev's user avatar
  • 1,145
0 votes
1 answer
156 views

AWS health check and respawn if issue

I have some instances in AWS which I need only one of them, no scaling. Of course we monitor those instances as well, but before alerting someone. I checked if there's a way in AWS to check for the ...
Kangt_qc's user avatar
  • 113
3 votes
2 answers
327 views

DNS layer with service discover as resolver not SRV

I need to know is there any solution for solving my problem. I have a BIND DNS server and consul as service discoverer. This is what i want as simple diagram: How can I configure this sample setup ...
Mohammad Hossein Fattahizadeh's user avatar
0 votes
0 answers
507 views

Kubernetes Influx DB - Backend Unhealthy

I am trying to deploy Influx DB on Kubernetes. Using the official Influx DB Helm chart. I am deploying this Helm chart with the following values file: persistence: enabled: true size: 5Gi ...
Noah Huppert's user avatar
4 votes
2 answers
13k views

Configuring correct firewall settings for GCP HTTP load balancer

I have two VMs running HTTP servers on port 8545 as shown in the figure and placed in an instance group. I created a HTTP load balancer in GCP to balance HTTP requests from end users. However, with ...
kosta's user avatar
  • 163