Questions tagged [multiple-instances]

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Unable to generate Hibernate reverse engineering using Embedded Derby connection in NetBeans IDE

I'm using embedded derby with Hibernate but when I try to generate Reverse Engineering after creating Hibernate.cfg.xml I'm getting following error. Cannot establish database connection with ...
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46 views

6 tomcat installation on same server [micro services project]

As part of a micro services project we are planning to install six tomcats on a single server. This is the first time installing these many tomcats or implementing micro services, so looking for ...
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1answer
20 views

Replicate changes to all instances in instance group

I want to create autoscalable instance group with load balancer in Google cloud platform. Since workload is prestashop site hence need to update content regularly. Is it possible to replicate updates ...
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2answers
74 views

Use one application for multiple user in windows server

i have a system with windows server, can i install an application (like ArcGis) and multiple user can use this application as single instance? for more detail, i need use one system for sharing ...
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1answer
49 views

Is there a way to force an instance group to “work harder” at one task?

I set up an instance group on the Google Cloud Platform to run a single python script. After running the script for a few hours, it looks like only one instance (4 vCPUs, 16 GB memory) has been ...
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1answer
45 views

SSH works fine at start but permission denied (publickey) after some time

I have 3 instances on GCP all ubuntu. I try to ssh from the private IPs in each as soon as I start the machines and they work fine but after some time they start throwing errors. shiv1499@...
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2answers
66 views

How do you have multiple websites on one ip address with no dns(raw ip address)?

I have two private websites that are running on different devices, that I want to use but aren't using a DNS, so the web pages that I am using are on the same Ip-Address. How can I get the contents ...
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1answer
332 views

How to ping a server on a different network by the hostname only?

have two networks that I am connected to via my computer, two different routers and all. This computer is connected to a windows domain "Domain A", I can resolve the IP from any Computer Name from ...
2
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1answer
457 views

list enabled systemd service instances

I'd like to list all enabled service instances. The following lists enabled services, but only shows the service, and not individual instance: systemctl list-unit-files --state=enabled The ...
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1answer
3k views

Nginx reverse proxy for multiple domains and subdomains

I have server running different sites and i need to config nginx reverse proxy for these domains, (example1.com, example2.com, test.example1.com), where dp I need to configure the domains in nginx for ...
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1answer
65 views

how to have multiple nginx apps without using docker

I am using Windows Server 2008 as my server and I have installed cygwin on it. I have installed nginx on cygwin and it is working fine. I am running 2 projects on this server and each one has its ...
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1answer
28 views

Multiple instances mysql on Centos 5.5

There was an old system on Centos 5.5 which pattern as below: OS:CentOS release 5.5 (Final) Web Server:Apache 2.2.3 AP Server:Tomcat 6.0.3.6 JDK:1.6.0_37-b06 DB:MySQL 5.5.27-1 As customer ...
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1answer
2k views

how to delete group instance in GCP

When I am going to delete the group instance it always failed. The notification is that, but the problem is that I can not find the 'projects/windowtrafic/global/backendServices/backend' in google ...
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1answer
257 views

Django application with multiple domains (blogs, apps) - is better one instance of server or more?

I am developing multiple simple applications in Django framework (you can imagine them as more complex blogs with various features). All the applications have a lot of similar features - mainly the ...
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1answer
69 views

Does the maximum amount of open descriptors in a server include it's children?

I know that Linux limits the maximum amount of open descriptors, usually to 1024. Now say I need to create a server which will handle more than 1024 users, 2000 for example, without tampering with the ...
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1answer
411 views

Multiple floating IPs

I am configuring Squid with High Availability. I want the setup with below conditions Two squid proxy servers (siblings) with one IP address each Both the servers in active passive HA cluster with ...
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2answers
145 views

How to find out request count to each instance behind an ALB in aws?

I have 50-60 aws instances running behind an ALB in AWS. I can get the total request count in the cloudwatch monitoring section, but is there anyway I can get to know how many requests are actually ...
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1answer
520 views

ProxyPass ip address variable

I'm setting up a proxy to let a totally isolated vlan (called VLAN1) to access to another vlan (VLAN2) via proxy. One server has two NICs : on for VLAN1 (10.1.1.50) and one for VLAN2 (10.1.2.254). ...
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113 views

One app, several virtual host and multiple apache instances

We are having a problem in witch from time to time our apache2 server stops working. When I try to restart it I need to first kill several existing running instances of apache. Like this: sudo ...
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1answer
47 views

Request forwarded to new instances without completion of Startup script (AutoScalling)

I am using google cloud load balancer to Auto scale instances in GCP. I have setup a Instance group of max 6 instances. When a instance is created, it runs a startup script (To install nginx, php, ...
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2answers
71 views

Amazon web service visibility restriction to instances under same account [duplicate]

I'm looking for a possible idea to restrict the visibility ec2 instances to certain IAM users under the same root account. custom policies doesn't seem to work because describeInstances doesn't ...
2
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1answer
67 views

is my understanding for aws auto-scale up and load balancer wrong?

Actually I am still a bit confused with aws auto scale up and load balancer I am wondering if someone can help me clarify if my logic of understand is right and if so, would it be possible to combine ...
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1answer
4k views

Nginx map directive only matching default

I'm using Nginx's map directive to route users to either stable or beta servers depending on the value of a custom http header. However, Nginx will only match to the default value, even when I've ...
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0answers
866 views

NGINX: Failover to backup in ip_hashed upstream

I'm using NGINX as a load balancer to run multiple instances of my site. I'm working on conditional routing to send users to specific servers based on an incoming HTTP header. The end goal is to have ...
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0answers
122 views

Run nscd in multiple network namespaces

How to run an instance of nscd daemon per network namespace? I did the following: ip netns exec <network_namespace> /usr/sbin/nscd However, it threw output /usr/sbin/nscd: already running ...
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2answers
869 views

mongodb, does one *need* a replica set for a minimal production db?

I'm fairly new to mongodb, and am tackling some devops issues here. We have a b2b saas product deployed on AWS where there is no network effect between customers, and some customers have much, much ...
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1answer
669 views

Postfix multiple instance only default work

Let me explain what I'm doing and what I want to reach from this postfix multiple instances I have domain for example "example1.com" and "mail.example1.com" for mail server and has proper DNS MX ...
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2answers
3k views

Windows 10, two monitors with two different sessions

I want to do some thing but I can't find anything about it. I remember that on Linux you can do a multisit workstation with one PC and several screens and perifericals (mouse, keyboard, etc), ...
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1answer
82 views

OpenLDAP configuration problems

I'm working on a proof of concept that requires me to test authentication against three different Active Directory domains. Each domain controller in each domain will have a different set of users. ...
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1answer
52 views

Instance group with nvme attached on google cloud platform

I understand that the local SDD (nvme) can only be added when the instance is launched. The problem is that we need to have a fast system of cache and it would be useful to be able to scale instances ...
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2answers
445 views

How to use Nginx load balancing to update one web server while the other one is responding?

I am looking for options and solution for my company project where we can host our websites on multiple servers and we can use load balancing. The major issue is that when I update websites, I need to ...
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0answers
79 views

Multi SSL certificate on Apache

I am trying to install two certificates generated from Letsencrypt using gethttpsforfree.com. I have followed the steps as mentioned for each domain and was able to generate the certificates too. ...
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3answers
7k views

How to install and start multiple MySQL instances on Windows 2012

I just installed MySQL 5.7 on Windows 2012 VM. I am trying to create and run multiple instances but very frustrated that such a simple thing is not working. I installed MySQL in C:\Program Files\...
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2answers
75 views

How can you serve 2 versions of the same site with different hostnames using Apache

I'm looking to offer my users beta access to test new features. I'm running my site using the Symfony framework. Currently I have the following working configuration: mysite.com: <VirtualHost *:...
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1answer
597 views

How to add an existing VM instance to an instance group to enable autoscaling?

we have two VM instances running in Google Compute Engine. The first one is running NodeJs instances that connect to a mongodb server installed on the second VM instance. Those have CPU higher running ...
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1answer
392 views

Run two apache (httpd) servers on CentOS 6

I'm actually working on an old CentOS 6.5 server during my internship in a society that produces maps. I worked last month on a CRM implementation that runs on an apache2 located in /usr/local/...
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1answer
6k views

I can not attach additional network interface to an existing amazon EC2 instance

I need three network interfaces in one instance for my work.By default there is one eth0 but I want to add eth1 and eth2 in an instance. I created network interfaces using the same security rule that ...
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0answers
58 views

Isolating game server instances on a single linux machine

Beloved community of StackExchange, I'm in need of your help. I'm trying to come up with the most efficient way to isolate game server instances on a single box. For now the setup includes a debian ...
0
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1answer
70 views

from security perspective one instance with Multiple Databases or multiple instance for multiple clients

We have 20 clients which currently every client has his own database on his own server(in his own environment) all the databases have the same structure(schema) and all of them has MS Sql Server 2008 ...
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0answers
507 views

How to monitor multiple instances of the same process with Monit

I have one process of which I need to run multiple instances. I would like to monitor this with Monit. Currently this is how I'm doing it. check program maintain_workers with path maintain_workers....
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1answer
199 views

How to configure multisite on Linux with Apache + Apache + Discourse

Situation and problem I have an Ubuntu Server 14.04 VPS, and want to host multiple sites on it, all with distinct domains: A wordpress installation (PHP + MySQL) A simple PHP site, no database A ...
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1answer
28 views

Using Google Computing Services

I am using google computing services and created an instance which I accidentally deleted. Is there anyway to recover the VM instance? Thank you very much
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1answer
411 views

Is it possible to share single instance profile between multiple aws ec2 instances?

Is it possible to share single instance profile between multiple aws ec2 instances? When I launch instane I can pass instance profile arn/name to it. Can I use single instance profile for different ...
2
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1answer
6k views

How to run multiple redis instances with systemd

I recently moved to Debian 8 "Jessie" which now use systemd and I can't find a way to run multiple redis instances. I found out there is a /lib/systemd/system/redis-server.service file to start redis-...
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0answers
78 views

OpenVPN: routing to two VPNs

Using Ubuntu 14.04 (up to date). I'd like to use two VPNs (openvpn) a the same time. LAN is: 10.1.1.0/24 The 1st VPN, homemade, is only routing the 192.168.1.0/24 network via the tunnel. Routes ...
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1answer
409 views

Using multiple .htaccess files with multiple ErrorDocument 404 entries

Here's what I'm trying to accomplish. Right now, in /var/www I have an .htaccess file with multiple ErrorDocuments defined for various errors. I also have subsites (i.e. /var/www/tf2c, /var/www/obtf2)...
3
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1answer
672 views

multithreading a single threaded application worker [closed]

I have a server which I want to dedicate for converting doc files to pdf via LibreOffice. The server has 6 cores and LibreOffice is single threaded. This means that generating a single pdf uses 16.666%...
2
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1answer
237 views

Run different instances behind one load balancer?

When using Amazon AWS is it possible to run different types of instances behind an load balancer? Let's say as base instance you have an t2.small and when having some more load you want an t2.micro ...
1
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1answer
640 views

What is the maximum MS Reporting Services Instances allowed?

Let me explain my problem: I'm using an Amazon EC2 instance as a DB and Report Server, currently the server has 11 Reporting Services instances installed and around 40 databases (22 from Reporting ...
0
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1answer
742 views

sensu multiple instances on same server

Is it possible to run multiple instances of the sensu server on the same box? The intention is to have a "development" monitoring server to split the clients away from the production servers