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Questions tagged [healthcheck]

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0
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1answer
24 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 ...
0
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0answers
58 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 ...
0
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1answer
41 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 ...
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0answers
27 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 (...
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0answers
8 views

Why SMARTCTL just halts on healthcheck? [duplicate]

I am trying to run health checks, but for some drives the command just halts. I guess faulty drives? I want it to exit promptly even if health check fails, it shouldn't just lag but exit with fail ...
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0answers
44 views

HAProxy HTTP Check JSON Response is not Working

I'm doing a HAProxy http check for my backend, the healthcheck URL generates a json response like this: {"healthCheckMongoDb":{"healthy":true},"healthCheckSolr":{"healthy":true}} This is my backend ...
1
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1answer
139 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" ...
0
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1answer
23 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 ...
2
votes
2answers
63 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 ...
0
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0answers
71 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 ...
1
vote
1answer
355 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 ...
1
vote
1answer
129 views

Determine load balancer health check timeout

How do you determine reasonable health check timeouts for load balancers? My application is failing load balancer health checks. I'm using the default health check timeout of 5 seconds, but I've ...
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0answers
79 views

proxy_hcheck_module does not work using TCP method

I am using a Windows build (and it has to be Windows) of Apache 2.4.33 from https://www.apachelounge.com I have configured it as a load balancer, and everything seems to work fine until I try adding ...
1
vote
1answer
65 views

How to access apps that have been deployed in k8s on Google Cloud Platform using a Google Cloud Engine HTTP(S) Load Balancer?

Aim: to access apps that reside in a kubernetes (k8s) namespace using an HTTP(S) Load Balancer (HLB) Methods TCP load balancing (TLB) (layer 4) A k8s cluster has been created on Google Cloud ...
1
vote
1answer
356 views

Using a GCP Global Load Balancer HTTP health check, is it possible to POST instead of GET?

We have configured GLB in GCP in front of a Netcool Ominibus Probe server. This is an API that accepts POST events only. When the health check on the GLB tries to connect to the probe server on port ...
0
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1answer
149 views

503 ALB health check HAProxy

I have a HAProxy behind Amazon ALB (Application Load Balancer) http/80 health check is ok, but https/443 gives me 503, even though the site is available & ok Here's what I see in HAProxy log: 4/...
0
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1answer
94 views

GCP Load Balancer very high health check frequency

I'm using an HTTP Load Balancer on GCP, configured via Kubernetes Ingress. It seems like the number of health check requests is very frequent: 10.0.4.1 - - [24/Apr/2018:17:53:25 +0000] "GET / HTTP/1....
1
vote
1answer
94 views

Best practice for auto-healing servers in the cloud (outside of AWS)?

We are in the process of moving from AWS where we have a highly available system setup using EC2's auto scaling feature. However, we aren't using this to change the size of the pool based on resource ...
0
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1answer
42 views

Should things like database performance be included in a healthcheck

I manage a webservice and it is very important for my company to detect and notify if any of the services is down, and also if any of the operations it does is taking too long to respond. Until now ...
1
vote
1answer
1k views

What is HEALTHCHECK really used for when running Docker in swarm mode?

I'm having a hard time figuring out what HEALTHCHECK really is used for when running Docker in swarm mode. One place suggests that Docker will restart a task which is considered unhealthy. Another ...
0
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1answer
2k views

Haproxy external check with arguments

I'm trying to use the Option external-check and can't get it to work with an argument. It if I can't pass anything then that option becomes useless. I've been trying for hours and nothing works. It ...
2
votes
1answer
525 views

AWS: Target.FailedHealthChecks… Site is working fine

My Elastic Beanstalk application is in a constant severe state... even though it's working absolutely fine. Looking at the Health screen it says that 100% of its requests are 3xx, and looking at the ...
1
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0answers
350 views

Is RST, ACK expected in a TCP Health Check

I've been experiencing some issues with two servers that I have with my VPS hosting provider where I've been getting intermittent connection errors. I've done LAN traces from the server and I ...
0
votes
1answer
368 views

Disable AWS ELB health check

Is there a way to disable AWS ELB's health check completely? I use a logger middleware (morgan) to log all requests and it's quite annoying for health check requests to get logged every 5min.
3
votes
1answer
2k views

HAproxy: Run script on health check change

I have set up a haproxy configuration with a backend with two servers looking like that: ... default option log-health-checks ... mailers mta mailer smtp1 127.0.0.1:25 ... backend ...
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0answers
49 views

Check age of oldest file in directory … But no other access

There are roughly 30 users and 30 directories with this structure: /home/user1/input/ /home/user2/input/ /home/user3/input/ /home/user4/input/ ... A check should monitor the directories. If the ...
2
votes
1answer
541 views

Broken GKE Backend Health Check Default

I have read this and I understand (I think) the differences between Kubernetes livenessProbes, and the GKE LoadBalancer health checks. My problem is this: I am exposing most of my Kube services via ...
0
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1answer
181 views

etcd on GCE-load balancing and health checks

I'm trying to set up a secure etcd cluster on CoreOS on top of GCE. I want to distribute load between several etcd nodes with some kind of load balancing. I want a load balancer that would have an ...
0
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0answers
320 views

Why is Varnish not probing the backend server?

I have two backends for a Varnish configuration. The first backend works fine, the second backend seems to be completely ignored by Varnish. It seems that the .probe on the second backend is ignored ...
-1
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2answers
50 views

Expose Windows system health over HTTP, machine-readable? [closed]

Are there any off-the-shelf tools that will expose the basic health of a Windows machine (network accessibility, system load, etc.) over HTTP in a machine-readable form that I can access from another ...
0
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0answers
317 views

checking backend health for more than 2 web servers in varnish 4

I have a varnish server with 3 backends. all backends are apache. everything is ok and the varnish server caches everything I need, and the connections are OK. I wnat to monitor the health of web ...
1
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0answers
155 views

HAProxy health check consecutive counts not resetting

We have two Redis servers behind an HAProxy server. One server is the master, which is up, and the other is the slave, which is down. If the master goes down, the sentinels elect the other server to ...
3
votes
1answer
965 views

AWS Elastic Beanstalk Health Check on Alternate Port using Application Elastic Load Balancer

I'm trying to automate the configuration of my Elastic Beanstalk application using Saved Configs. Does anyone have an example of how to get the application load balancer created from Elastic ...
0
votes
1answer
178 views

Google cloud autoscaling kills instances which do job

I'm trying to setup GCP autoscaling for my application (video converting service) and I'm experiencing the following problem: Let's say the autoscaler creates 3 new instances and in the each ...
0
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1answer
438 views

Restarting Google Compute Engine instances if unhealthy

Health checks can probe my instance on specific http requests and determine if it is unhealthy. From the documentation I undertsand that autohealing only works for managed instance group, which means ...
0
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1answer
484 views

Setting up health check for EC2 instances with DataDog

I have an existing AWS infrastructure which is integrated with DataDog, which is responsible for monitoring various metrics, e.g. SQS queues, ELB, etc. I'd like to set up a health check for some web ...
1
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1answer
125 views

(NGINX LB + docker-compose) Stop 1 service and now only use the other one

I'm using NGINX inside docker-compose with 2 node services. The load balancing is working. Not sure if this is how it should be, but my page load goes to ping1, then the CSS file loads from service ...
2
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1answer
1k views

How to respond to http health check at a particular url while redirecting other traffics?

Background: I am trying to set up an instance group in Google cloud platform. The instance group consists a number of nginx instances whose job is simply to redirect incoming https traffic to an ...
3
votes
1answer
2k views

HAProxy health check for a single backend

I have a HAProxy configuration with a single backend something very similar to this: backend mybackend option httpchk get /ping http-check expect ! rstatus ^5 server mybackend-0 192.168.1.1:9041 ...
1
vote
1answer
88 views

ELB Health check passes. Scaling Group Shows unhealthy. With scaling group set to the ELB check

Having an issue where our ELB health checks are showing up as healthy on the ELB page. but checking on the Scaling group instances page its showing as unhealthy. causing the autoscaler to kill it ...
1
vote
1answer
65 views

Automated Installation Testing on Windows [closed]

I am looking for some software I can work with that will allow me to test that programs were installed and are functioning correctly. Instead of opening each program manually and see it working, I ...
-1
votes
2answers
5k views

how to install healthcheck module in nginx

I have installed nginx 1.10.0 in ubuntu and setup Load balance concept. Now, setup 2 server I need to add Health check module to chenck health status of our server. root@server:/usr/sbin# nginx -v ...
0
votes
2answers
924 views

How to setup health check on multiple ports in new AWS Application LB?

Can someone help me setting up the multi-port health check on single AWS ALB. My instances have been running with dockerized containers on different ports. ALB Scheme is internal LB. Please help.
0
votes
1answer
592 views

ARR Web Farm Health Test sends hundreds of requests

I have an IIS ARR/Web Farm using the Health Test feature (healthcheck). The settings on the test are to check the given url every 30 seconds. It does check every 30 seconds, but it sends hundreds of ...
0
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0answers
328 views

HAproxy health checking multiple sites within a pool

I've got haproxy setup and everything works great but noticed that my fail-over isn't properly configured. We have 1 pool with 2 backend webservers configured, our backend webservers are IIS and have ...
1
vote
1answer
2k views

Haproxy http response timeout check

We use haproxy as http load balancer. Sometimes one of our servers stop responding while accepting http connection requests. So stats page displays servers as green "accessible" but our nagios server ...
3
votes
1answer
1k views

Where are the Google Health check logs

I am running a GCE instance and on it I have a Kubernetes cluster running. An HTTP Load Balancer is also configured to probe the health of the a Kubernetes service running on this instance. But I ...
0
votes
1answer
755 views

AWS ELB health check fails on LDAP authentication

I am running a Docker container through ECS. The container runs an Apache server hosting a simple web application. However, the server requires LDAP authentication to access the page. I am using a ...
1
vote
1answer
1k views

AWS ELB health check when using nginx and TCP

I have an elasticbeanstalk environment that uses nginx as a frontend server for a node.js application. The environment uses an elastic load balancer configured to accept connections on TCP:80/SSL:...
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vote
0answers
651 views

NAP clients are evaluated as non NAP-capable

The setup: Active Directory domain, Remote Desktop Gateway server, NPS/NAP server (all Windows Server 2008 R2) and a few Windows 7 clients. The RDG and NPS are set up and running with all Connection ...