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11
votes
2answers
525 views

How can I find out the very first time linux machine start up? [duplicate]

When we use uptime, it only shown us the up-time of ours machine since it started from the last time it turning on/shutdown/reboot. But, what if I want to get the time when our machine started from ...
10
votes
7answers
763 views

Uptime Monitoring Every Second - Bad For the Server?

I'm wondering if there's avantages of checking if a server is UP by doing a "HTTP GET Request" every second? Can any server handle it?
10
votes
1answer
280 views

Update Docker container without downtime

Let's say I have a Docker container with a web server (like Apache 2). Now I want to update the OS under it. This SF answer says the best way is to rebuild the base image and my Apache image. But ...
5
votes
6answers
7k views

Simple web server monitoring (alive)

Any tip about software to monitor if a web server is up and running on linux ? It should be able to run with not knowing anything more than the URL. And it must have functionality to send an email ...
4
votes
7answers
2k views

Detecting restart since last run in a shell script on Linux?

What's the best way to tell from a shell script if the host has restarted since the last time the script was run? I can think of storing the uptime in a file on each run, and checking if it has ...
4
votes
3answers
365 views

How do I handle post-mortems/incident reporting with Nagios?

I just started using Nagios and I like that my team can acknowledge problems, but I haven't yet found a way to log the solutions that are used to correct the problems. Is there a tool that logs ...
4
votes
3answers
373 views

Reasonably-priced, multiple endpoint heartbeat software

We've got four servers in use for a mission-critical application that all need constant connectivity to each other--six always-up connections in total. I need a way to monitor these connections and ...
4
votes
1answer
720 views

General SLA Expectations and Maintenance for Standard Services

What would generally be your expectation for SLA uptimes across the following services in a given month for a 'normal' scenario? I'm including my expectations... the purpose of this question is to ...
3
votes
1answer
235 views

apache httpd restarts every 24 hours

I have an Apache/2.2.22 (Linux/SUSE) and it automatically restarts every day at the same time. I have no cron jobs configured to do that on any user. I started collecting minutelly snapshots of the ...
3
votes
3answers
5k views

Method to calculate downtime percentage

I need a calculation to work out the downtime percentage of a server. I am making a script that runs via cron every minute to check the uptime of a remote server. The two values I have to play with ...
3
votes
2answers
146 views

Exposing server uptime a potential security vulnerability?

I run a browser-based game and as part of a page with a bunch of game statistics, I have the server uptime listed. It's currently at 177 days and so someone mentioned to me that I shouldn't do this ...
3
votes
1answer
267 views

How to monitor Flash applets?

We created a fancy Flash application for a customer and deployed it. The server itself is monitored by the hosting company, but is there any external monitoring service that works well with Flash ...
2
votes
6answers
2k views

reaching 99.9999% uptime

I am currently developing a project which is mission-critical. The actual domain name is registered with 1 & 1 and I plan on purchasing DynDNS Custom DNS service (which has 5 different ...
2
votes
3answers
487 views

Is it possible to guarantee 100% uptime in redundant hosting servers inside a cloud computing structure?

I'm interested in find a hosting that can offer really 100% of uptime. Is it possible in hosting servers inside a cloud computing structure?
2
votes
4answers
2k views

How can you tell if a server is down?

Let's say I am getting no connection to a website over http, ie. "Oops! Google Chrome could not connect to x" returns in a browser. What steps can I take to determine if the server is completely ...
2
votes
5answers
195 views

Reinstalling Linux: how to avoid downtime?

My website runs on a dedicated Debian LAMP server . I would like to update the system (let's say I have a pretty old Debian version and I want to reinstall everything from scratch) What strategy can ...
2
votes
4answers
1k views

Storing / calculating historical load averages

When I run uptime, I get output similar to the following: 07:50:39 up 13 days, 5:00, 1 user, load average: 0.00, 0.02, 0.00 Is there a way, other than by running uptime every X-many minutes, to ...
2
votes
4answers
3k views

Ping Equivalent For Checking If A Port Is Open

How do I check if a port is consistently alive? For example, I could use ping 192.168.1.1 -t > results.txt This will ping 192.168.1.1 continuously so that I could monitor it. Is there an ...
2
votes
3answers
260 views

“uptime” and “who” disagreeing

I've got an Ubuntu server that's exhibiting a somewhat strange behavior. uptime reports the following: 07:48:10 up 627 days, 21:19, 3 users, load average: 0.04, 0.01, 0.00 w reports: 21:59:25 up ...
2
votes
4answers
234 views

Question regarding uptime strategy for website

I'm working on a website where we need to have a good deal of uptime. Specially in the short bursts (15-day periods) that the website's events happen. The page is dead simple and can be served ...
2
votes
3answers
253 views

Is reading the HTTP GET response enough to know if the server is up?

I want to make sure the site is UP and running. Is reading the HTTP GET Response enough? What does services like PingDom test?
2
votes
1answer
820 views

What does the suffix 'w' and 'd' mean with 'TIME+' in top?

Here's a chunk of the top from my server: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 18878 www-data 20 0 200m 13m 4704 S 0 0.2 0:00.07 apache2 12374 ...
2
votes
1answer
1k views

php APC uptime problem

I am on LAMP with Alternative PHP Cache. It worked fine until yesterday when I updated the website and changed a few mySQL queries (I don't see the how it would affect APC opcode cache) Today I see ...
1
vote
4answers
669 views

Server Load very high despite CPU usage being low

When I run the top command I get this top - 23:20:50 up 1:25, 1 user, load average: 11.02, 11.20, 10.41 Tasks: 262 total, 3 running, 258 sleeping, 1 stopped, 0 zombie Cpu(s): 75.6%us, ...
1
vote
6answers
802 views

How to protect power strips from accidental shut-offs/“cleaning lady” attack?

Are there any power strips or products designed to defend against a "cleaning lady" attack (cleaning crew is vacuuming the floor and bumps the power strip switch, turning off all the connected ...
1
vote
3answers
541 views

DNS Round Robin only if one goes down?

I've got two servers, equal capabilities in terms of processing power and load. What I am trying to accomplish is this: (I already own and run DNS servers so this shoudln't be a problem). Server A ...
1
vote
3answers
127 views

Should I leave my hosting provider

I have my website hosted with a hosting provider and they have recently had a serious outage. So at the moment it is at 48 hours and counting where I can't access email, http or ftp. I'm obviously ...
1
vote
3answers
160 views

Do these server uptime 'pinging' services really do anything special?

Other than pinging a particular endpoint like to see if my website server is returning, do these server monitoring (ping) type services offer anything else? I'm just thinking it is cheaper to get a ...
1
vote
6answers
667 views

Windows Server 2003 Availability / Uptime

I'm looking at putting together a support SLA. As a base line I'd like to know roughly what sort of percentage availability I should expect from a non-clustered Windows 2003 Server. Assumptions are ...
1
vote
2answers
846 views

Command / Method to find the up-time of SSH server daemon & Nginx

I am looking for a method / Linux command to get the up-time of the open-ssh server and Nginx server running on my Ubuntu system. I want to know the up-time for calculating some internal statistics. I ...
1
vote
2answers
143 views

How to verify promised uptime before hiring a server?

I've been bitten by this too many times. You find a well known hosting provider, read comparative reviews (and pass by on any company that has influence in those review), they promise 99.99% uptime, ...
1
vote
2answers
187 views

Diagnose why server went down

I have a couple of Asp.Net web apps running a Windows Server 2008 R2 VPS. We have been using this VPS for years. Since the last few months, we have had our apps go down for 30-45 mins. This doesn't ...
1
vote
1answer
1k views

May I use CDN for whole website (PHP, Apache, MySQL) or just for images and CSS, JS files?

May I use CDN for whole website (PHP, Apache, MySQL) or just for images and CSS, JS files? What's the best choice > cloud-hosting or dedicated-hosting? Does CDN has that support? Witch hosting you ...
1
vote
4answers
2k views

nginx: how to load a new conf file witout restarting nginx

I made a new conf file in sites-available (and linked it in sites-enabled) and now I want to "install" that conf file without resetting the nginx server. As root, I can run nginx -c file.conf since ...
1
vote
3answers
392 views

Self uptime monitor?

Is there an app or a technique i can use to self monitor a server? For a technique i was thinking of writing a log file every minute and clearing them every hour marking down every minute my app did ...
1
vote
3answers
4k views

Determine process uptime

Is there a way to determine the 'uptime' of a process in Windows. Disappointed to find that it is not one of the attributes available when using the Task Manager.
1
vote
3answers
1k views

Is there a Ruby, Python or open source way to monitor uptime?

Is there a Ruby, Python or open source uptime monitor like PingDom, etc?
1
vote
2answers
3k views

Is there a locally hosted service (similar to Pingdom) for monitoring uptime/response time? [duplicate]

Possible Duplicate: What tool do you use to monitor your servers? I'm looking for something to monitor intranet apps and internal web services, and provide logs of historical response ...
1
vote
1answer
167 views

Load average 1.00 while top seems to show the server as idle

My server is not responding to HTTP requests, and it took me a long time before being able to log in with SSH; it all looks like the server is overloaded and on its knees. It already did that a few ...
1
vote
2answers
1k views

Keeps “SSH timeout” error in our AWS instance- how do i diagnose?

I am befuddled by this error. We keep failing to SSH into our AWS instance, whether it is is deployment or via console. I have tried rebooting a few times, but it does not seem to be helping. Here ...
1
vote
2answers
1k views

Lifetime of IIS worker process or AppDomain

I have an ASP.NET app hosted in IIS, and I have automatic worker process recycling/shutdown disabled. I'd like to have a rough idea of how long the app has been running continuously without being ...
1
vote
1answer
687 views

How does Heartbeat determine when to switch to the secondary? Can you force it to switch?

I've been trying to understand exactly how Heartbeat works - I understand how when one server dies, it switches to the backup. But, for me, it also switches when the primary has a large increase in ...
1
vote
1answer
101 views

Considering no website/service is 100% up, how do systems measure web downtime with precision?

I think the title speaks for itself. But, to give an example: In a recent post, 37 signals show it's real downtime and compares with other web services. They get very few down time and probably most ...
0
votes
8answers
815 views

Server Uptime before a reboot

I was just visiting a server at the datacenter and notied that it has been up(without a reboot) since last October (11 months). It is a VMHost running Windows Server 2003. Even if something has ...
0
votes
3answers
1k views

Apache uptime question

I've been doing web development for some time, but server admin has never been part of my job. I'm finding that more and more I need to learn about what is going on under the hood. Looking at server ...
0
votes
2answers
269 views

How Can Linux Top Show 2% Idle, but Load Say 1.20?

On CentOS5, I'm seeing the 'top' command showing a hover between 20% and 2% idle, but then the load says 1.20. How can that be possible? When I type 'uptime', as well, I see 3 load numbers that are ...
0
votes
1answer
992 views

Fake Server Uptime (Linux/Windows) [closed]

Is it possible to fake the server uptime in any way (throttling the time).?(Linux/Windows). I guess it will cause serious troubles, still just wondering. -Cheers
0
votes
5answers
235 views

suggest web server monitoring service [closed]

Please, suggest web server(web site, web hosting) monitoring service. It should : - be online - monitor from different locations - monitor uptime, response time etc. - have alerts
0
votes
4answers
305 views

System Uptime Monitors

I am looking for reviews and suggestions a an online service such as http://www.alertmefirst.com/ I need a service or system that can monitor the following and provide me daily emails and monthly ...
0
votes
3answers
514 views

Converting a non-raid linux box to Raid, with minimal downtime

I want to convert a non-raid linux system to RAID1, using two new disks. I would like to do this with minimal downtime. Rather than adding the disks and shutting down to single user mode to copy ...