Nuffing.com

via Dilbert Daily Strip
Comic for February 22, 2018

In this blog post, I’ll look at how to make Percona XtraDB Cluster and SELinux work when used together.

Recently, I encountered an issue with Percona XtraDB Cluster startup. We tried to setup a three-node cluster using Percona XtraDB Cluster with a Vagrant CentOS box, but somehow node2 was not starting. I did not get enough information to debug the issue in the donor/joiner error log. I got only the following error message:

2018-02-08 16:58:48 7910 [Note] WSREP: Running: 'wsrep_sst_xtrabackup-v2 --role 'joiner' --address '192.168.100.20' --datadir '/var/lib/mysql/' --defaults-file '/etc/my.cnf' --defaults-group-suffix '' --parent '7910' --binlog 'mysql-bin' '
2018-02-08 16:58:48 7910 [ERROR] WSREP: Failed to read 'ready <addr>' from: wsrep_sst_xtrabackup-v2 --role 'joiner' --address '192.168.100.20' --datadir '/var/lib/mysql/' --defaults-file '/etc/my.cnf' --defaults-group-suffix '' --parent '7910' --binlog 'mysql-bin'
 Read: '(null)'
2018-02-08 16:58:48 7910 [ERROR] WSREP: Process completed with error: wsrep_sst_xtrabackup-v2 --role 'joiner' --address '192.168.100.20' --datadir '/var/lib/mysql/' --defaults-file '/etc/my.cnf' --defaults-group-suffix '' --parent '7910' --binlog 'mysql-bin' : 2 (No such file or directory)
2018-02-08 16:58:48 7910 [ERROR] WSREP: Failed to prepare for 'xtrabackup-v2' SST. Unrecoverable.
2018-02-08 16:58:48 7910 [ERROR] Aborting
2018-02-08 16:58:50 7910 [Note] WSREP: Closing send monitor...

The donor node error log also failed to give any information to debug the issue. After spending a few hours on the problem, one of our developers (Krunal) found that the error is due to SELinux. By default, SELinux is enabled in Vagrant CentOS boxes.

We have already documented how to disable SELinux when installing Percona XtraDB Cluster. Since we did not find any SELinux related error in the error log, we had to spend few hours finding out the root cause

You should also disable SELinux on the donor node to start the joiner node. Otherwise, the SST script starts but startup will fail with this error:

2018-02-09T06:55:06.099021Z 0 [Note] WSREP: Initiating SST/IST transfer on DONOR side (wsrep_sst_xtrabackup-v2 --role 'donor' --address '192.168.100.20:4444/xtrabackup_sst//1' --socket '/var/lib/mysql/mysql.sock' --datadir '/var/lib/mysql/' --defaults-file '/etc/my.cnf' --defaults-group-suffix '' '' --gtid '0dc70996-0d60-11e8-b008-074abdb3291a:1')
2018-02-09T06:55:06.099556Z 2 [Note] WSREP: DONOR thread signaled with 0
2018-02-09T06:55:06.099722Z 0 [ERROR] WSREP: Process completed with error: wsrep_sst_xtrabackup-v2 --role 'donor' --address '192.168.100.20:4444/xtrabackup_sst//1' --socket '/var/lib/mysql/mysql.sock' --datadir '/var/lib/mysql/' --defaults-file '/etc/my.cnf' --defaults-group-suffix '' '' --gtid '0dc70996-0d60-11e8-b008-074abdb3291a:1': 2 (No such file or directory)
2018-02-09T06:55:06.099781Z 0 [ERROR] WSREP: Command did not run: wsrep_sst_xtrabackup-v2 --role 'donor' --address '192.168.100.20:4444/xtrabackup_sst//1' --socket '/var/lib/mysql/mysql.sock' --datadir '/var/lib/mysql/' --defaults-file '/etc/my.cnf' --defaults-group-suffix '' '' --gtid '0dc70996-0d60-11e8-b008-074abdb3291a:1'

Disable SELinux on all nodes to start Percona XtraDB Cluster.

The Percona XtraDB Cluster development team is working on providing the proper error message for SELinux issues.

via Planet MySQL
Percona XtraDB Cluster and SELinux: Getting It To Work

USA – -(Ammoland.com)- The evangelist Billy Graham died Wednesday at his home in Montreat, N.C., his family has announced. He was 99.

Born in Charlotte, N.C., Graham was ordained a Southern Baptist minister in 1939. During his work in ministry, he wrote more than 30 books and conducted the annual Billy Graham Crusades until his retirement from active ministry in 2005. His last book, Where I Am: Heaven, Eternity, and Our Life Beyond the Now, was published in 2015.

Dr. Robert George, a professor at Princeton University and a former chairman of the U.S. Commission on International Religious Freedom, compared Graham to St. John Paul II and other religious figures, saying that while he was “firmly rooted” in his denomination, Graham was able to reach all people.

“let those who have spiritual ears to hear: HEAR what the Holy Spirit and the Spirit of THE LORD Yeshua, the Lord Jesus Christ is saying to the seven churches…”

Reverend Graham left us many moving video sermons that are worth watching, including his last message to the world.

God bless the Reverend Billy Graham.

This post Remembering Reverend Billy Graham ~ VIDEO appeared first on AmmoLand.com .

via AmmoLand.com
Remembering Reverend Billy Graham ~ VIDEO

Vivid effects on websites could get you an edge in the competition for the user’s attention. Parallax scrolling might be what you’re thinking of now. That is not the only option for dynamic web design, though.

HTML5 Data Attributes: Invisible, But Not Unnecessary

HTML5 data attributes let you store any data within a valid source code. Data labeled using data attributes are not displayed for the user and don’t affect the layout. Nonetheless, they exist on the site, and can easily be processed, using JavaScript, for instance.

Dynamic Text Snippets With dynamo.js

dynamo.js is a rather simple, near-foolproof JavaScript by the developer Jordan Scales, whose main occupation is working for the Khan Academy. The task of dynamo.js is equipping animations to text content in a way that allows for the text components to be exchanged dynamically. At first, this sounds really unnecessary, but, upon closer investigation, it offers several interesting options.

dynamo.js works with HTML5 data attributes, and a CSS class called dynamo, which the function .dynamo() is applied to. In order to give brand new meanings to the following sentence

I wish I had wings

dynamo.js could be used as follows:

I wish I <span class="dynamo" data-lines="had ten million Dollars,was always right,was on vacation">had wings</span> 

Now, dynamo.js would go through the sentences within the data attribute data-lines, changing every three seconds. The result will be the following (without the bold markup):

I wish I had wings
I wish I had ten million Dollars
I wish I was always right
I wish I was on vacation

This and other effects can be checked out on the dynamo website. In contrast to what I did here, you are better off writing special characters in their respective entities. Dynamo.js can be very specific when it comes to that.

In addition to the designation of the rotating content, the attributes data-speed and data-delay control the speed of the rotation. The attribute data-center centers the text contents within the span. Generally speaking, .dynamo() can be applied to every element. A wild combination within the same text may lead to a nearly chaotic alienation of the content.

The script is available for free usage on GitHub, under the MIT license. It requires jQuery.

Animations With skrollr

skrollr allows for the animation of any CSS attribute of an element, depending on the position of the horizontal scrollbar. Sounds complicated, but it isn’t.

The animation is controlled via data attributes. The following (rather simple, in comparison) code snippet leads to a change in background color while scrolling.

<body data-0="background:hsl(0, 50%, 70%);" data-end="background:hsl(360, 50%, 70%);"></body>

The attribute data-0 indicates the original position, while the corresponding data-end indicates the final position. The in-between stages are automatically calculated by skrollr.

The controls are done via keyframes from the DOM, so it can be very precise. This makes it possible to create extremely complex animations, as seen on the example website.

JavaScript knowledge is not required to use the skrollr functionality. However, you should have some CSS skill.

As CSS is used within the data attributes, your options are near unlimited. The tiresome vendor prefixing is taken care off by skrollr automatically, as a manual prefixing within the skrollr syntax wouldn’t even be possible.

skrollr doesn’t need any support in the form of jQuery or other libraries and only weighs about 12 Kilobyte. The small animation library was mainly developed by Alexander Prinzhorn, and is available for free usage under the MIT license on GitHub.

Keep in mind that skrollr has not been in active development for almost four years, since September 2014, as Alexander thankfully tells you himself. This will become a problem at one point in the future when using modern browsers and mobile versions.

Then again, skrollr works differently on mobile devices than on the desktop as it is. The library recognizes the mobile access and turns off the native scrolling. The mock-scrolling is done using CSS Transforms based on touch events. From my understanding, this concept should stay viable for a while.

On this site, the developer has compiled a rather long list of users of the library. Personally, I really like the site of the Eckwerk. In contrast to the rather theoretical, dry presentation of the library on the specifically created demo page, the Eckwerk shows what skrollr is capable of when used with interesting content and a vivid design.

(The article was originally written in the German language by our author Dieter Petereit for our sister magazine Dr. Web.)

via Noupe
Simple Solutions for Dynamic Web Design With HTML5 Data Attributes

via Dilbert Daily Strip
Comic for February 21, 2018

Walking on the path of entrepreneurship can be a difficult task as there will always be obstacles and challenges. As someone who’s new to entrepreneurship, you should be prepared to face them.

As you embark on your journey, you will encounter issues about legal matters, finances, product development, intellectual property, and much more. The list can easily overwhelm new players.

This makes it important that you fully commit yourself to your business. If you feel that you cannot handle things on your own, there are teams of entrepreneurial finance assignment help that can assist you in getting organized.

And to make sure that you are completely prepared, here are some of the best tips for new entrepreneurs.

Always Keep Cash Handy

As an entrepreneur, you must remember that the money you prepared as capital may not be enough. For your business to function smoothly, there needs to be a consistent flow of cash.

Find investors and venture capitalists who can help fund your ideas and business. Convince them and make them believe in your vision.

Take note that they will likely ask about the expected returns on their investments.

Focus on people and their needs

Stay focused on what your employees need. Make sure to invest in their training.

The skills and knowledge that they’ll learn will be really valuable to the success of your business.

Ask yourself on what business model fits you

If you have started a business just for the sake of earning money and you don’t have any interest in it, don’t expect that business to last long.

Before you start a business, make sure that it’s something that goes in line with your passion and interest. When you are passionate about something, you’ll work really hard to make it successful.

Now, this doesn’t mean that passion is everything. There are factors and situations that can also influence the result you’ll get.

Keep your personal life away from your professional life

As an entrepreneur, you will spend at least 12 to 13 hours a day working on your business.  As a result, you may not have time to socialize anymore.

As an entrepreneur, you need to know how to balance your work and personal life. Spending too much time on work can result in burnout and that can make you less productive and focused.

Take a break when you need to. It will not only refresh your mind but it can also give you better ideas that can improve your business.

See Also: 5 Ways to Balance Work and Family Time Even if You’re a Workaholic

Don’t let your debt pull you down

When you are starting a business for the very first time, remember not to lose yourself in debt. You have just started your business and you need money for many things.

Credit should not be one of your worries. Moreover, it is incredibly risky to take debts in the initial phase.

If you are in debt and your business skyrockets to success, it’s all well and good. However, if your business fails, you would still have to pay your debt off since you’re the designated personal guarantor of the loan.

If you really need to borrow money, make sure that it’s within manageable limits.

Jot down your ideas and what you learn

As an entrepreneur, you will have a million things running inside your mind. With so many ideas, there’s a good chance that you’ll forget them in a snap.

The best way to avoid that from happening is to write down your thoughts and lessons in a notebook. You can look back at your notes whenever you need to recall your ideas.

See Also: 5 Benefits of Journaling To Inspire and Motivate You

Take some, leave some

Wise words from someone experienced can be an asset to your business. However, to ensure the success of your business, learn to sieve good advice from the bad ones.

Once you’re able to do that, you’ll be off to a good start. If you are unsure about what to do, just trust your instinct.

Conclusion

The 7 tips for new entrepreneurs can make you a smarter player in the business arena. If there is one thing on that list you haven’t implemented yet, then it’s time that you do.

Small changes can make a big difference. So, keep your mind fueled with positivity and stay healthy and happy. Success will follow shortly.

The post Tips for New Entrepreneurs: What You Need to Know Before Starting A Business appeared first on Dumb Little Man.

via Dumb Little Man – Tips for Life
Tips for New Entrepreneurs: What You Need to Know Before Starting A Business

Angry Birds Champions is now available on iOS devices and through the developer’s website, allowing players to fling their feathered friends against precarious piles of pigs in a bid to win real money for the first time. The game is accessible through the WorldWinner iOS app or on WorldWinner.com, joining the studio’s other real-money tournament games like Wheel of Fortune, Solitaire, Scrabble and Trivial Pursuit.

"It’s really the original Angry Birds physics game — and obviously Rovio’s done a number of different derivatives using the iconography — but this is the core physics game of shooting birds and killing pigs," WorldWinner boss Jeremy Shea told Engadget.

Angry Birds Champions is an officially licensed title, made in conjunction with Rovio. It uses an asynchronous multiplayer format: Someone pays to enter a tournament and completes one of the two modes, best-of-three or progression, and their highest or combined score is recorded. The game finds another similarly skilled player in the tournament and that person plays the same levels. Whoever ends up with the highest score wins the cash prize, and WorldWinner takes a little off the top of each match.

WorldWinner’s matchmaking system takes a number of factors into account, including how many games you’ve played, how well you’ve performed in specific tournaments, your win-loss ratio, and average or best scores.

These competitions are generally worth a few dollars each and cost less than a dollar to join. Shea wants to be clear that this isn’t gambling — WorldWinner has been building real-money tournament games for 18 years and it knows the laws inside and out. A handful of big-name games, including Star Wars: Battlefront II and Counter-Strike: Global Offensive, have come under scrutiny in recent months over their use of loot boxes and other gambling-adjacent systems. WorldWinner argues games like Angry Birds Champions are skill-based competitions, eliminating the element of chance that would turn them into gambling.

Still, 10 states have regulations that make WorldWinner’s lawyers squirm, so cash tournaments aren’t available in those areas (Arkansas, Connecticut, Delaware, Illinois, Louisiana, Maryland, Montana, South Carolina, South Dakota and Tennessee).

"We’re always in conversations with members of different states, and obviously there are players that want to play from certain states that we don’t allow and they’re disappointed when they find out," Shea said. "But in terms of gambling laws and regulations on a state-by-state or country-by-country basis — we spend a considerable amount of money on attorneys and we’re absolutely in line with the regulations as they are today and will be tomorrow."

Angry Birds Champions also isn’t trying to become the next big eSport — though Shea would forgive you for thinking so. Players do win real money by playing Angry Birds Champions, but it simply isn’t built to be a spectator sport.

"We clearly deliver competitions for money, from small two-player tournaments up to thousands of people participating," Shea said. "We deliver the entry fee and the prize model that most of your eSports competition deliver. But… we’ve never been in the viewership model. So I think that’s the one area where we evolve our lingo from saying we are eSports to we are really on the edge of eSports."

Angry Birds comes with a built-in player base, with 4 billion downloads (and at least one movie) since the franchise’s launch in 2009. Shea expects Angry Birds Champions to have tens of thousands of players, easily.

"That is one of reasons that we went with the partnership with Rovio, in particular at this stage of our development: In the past six months we have shifted our focus from being very committed to delivering a PC-based consumer experience where we’ve had our success for close to two decades, to trying to enter the mobile space," Shea said. "Our expectation is that this week, we hit all of our launch targets and this will quickly scale to be one of our top-performing games, which would put it in the thousands of players playing in a given day."

And that’s just on iOS — WorldWinner is working on an Android version of the game as well, though there’s no launch window just yet.

via Engadget
‘Angry Birds Champions’ lets players fling pheasants for real money

Outside casting, we’ve barely heard a thing about Netflix’s reboot of the cult scifi classic Lost in Space. Now, we finally have a cryptic teaser as our first look… and it seems like this show is going to be a lot more serious than you might have expected out of a new Lost in Space.

The first teaser doesn’t really actually show much of the series itself—it’s a teaser of the space-suit-clad Robinson family grimly taking their final steps on Earth while lamenting that the world is no longer a home that can keep humanity safe. Meaning, it’s time to get into a spaceship and, well, get lost. In space.

Things naturally go awry by the end of the teaser, and you get your practically mandatory “danger, Will Robinson!” callout, but otherwise, it feels less like Lost in Space and more like a totally new and somewhat intriguing series that just happens to share the name.

Lost in Space, starring Molly Parker, Parker Posey, Toby Stephens, Ignacia Serricchio and more, hits Netflix April 13.

via Gizmodo
Here’s Your First, Very Serious Look at Netflix’s Lost in Space Reboot

via MakeUseOf.com
Why Can’t 64-Bit Operating Systems Run 16-Bit Apps?

Uber announced Wednesday that it’s rolling out a new product: Uber Pool Express, a carpooling service targeted at commuters. Uber won’t like this comparison, but honestly, just think of it as a bus stop.

When a rider selects Pool Express, the app groups them with nearby riders who are all going to destinations that are near each other. Uber then determines a “smart spot” for riders to walk to. From there, a driver picks everyone up at once and drops them off at a spot near all of their destinations. Unlike traditional Uber Pool, there’s a single pick up and drop off spot for all riders.

Uber piloted the service in San Francisco earlier this year, and now Pool Express is being rolled out in cities across the US. Uber told the Washington Post that Pool Express will be about 50 percent cheaper than Uber Pool.

How is this not a bus stop? Uber director Ethan Stock shrugged off the bus comparisons, saying Express Pool isn’t analogous to public transportation because pickup and drop off points are algorithmically determined based on riders’ locations and where they’re headed, as opposed to being fixed routes with set pickup times.

“Everything about the Express Pool product is dynamic,” Stock told reporters.

Sure.

But Silicon Valley’s need to “disrupt” everything by way of thing-sharing apps and marketing contrivances leads to thunderously out of touch statements.

From a conversation between The Verge and Uber’s product head:

“We think carpooling is very much the way of the future,” Ethan Stock, director of product for shared rides at Uber, tells The Verge. “Not only for our service, but we think the transformation of car ownership towards carpooling is going to be tremendously beneficial for cities, for the environment, for all the reasons that we’re very familiar with — congestion, pollution, etc.”

Is Uber trying to rebrand carpooling and riding the bus as an eco-friendly gimmick? Stock’s reasoning only makes sense if you forget car ownership is still a luxury for many people. No wonder this pilot started in San Francisco.

But, as it happens, I visited San Fran just last week and gave Express Pool a few tries. It was… fine? In my experience, Express Pool was about $2 to $3 cheaper than Uber Pool (a traditional shared ride), which makes it drastically cheaper than Uber X (a solo ride.) Still, there’s at least one downside. It takes a few minutes for the app to determine the pick-up and drop-off locations, and then it takes a few more minutes for a car to arrive. Minor inconveniences, but still pretty annoying if you’re accustomed to being whisked away in a Prius or just driving somewhere yourself.

When The Information reviewed Uber’s 2017 finances recently, it noted that Uber Pool has never been profitable, but its cheaper price attracts new customers who otherwise might not use the app. Pool Express may similarly make Uber an option for people who would otherwise skip the app over higher prices.

And who are we talking about, exactly? Uber is aiming Pool Express squarely at commuters who want to save money, but don’t want to ride the bus.

“We would love to get into a state where people are confident in trusting us for their daily commute to and from work, whether those people are old and young, within the city or suburbs,” Stock told Washington Post. “What we see is that public transit works really well on core high-volume routes. In the diversity of moving all over a city it becomes harder and harder for public transit to do well … Uber is really phenomenal at it.”

Pool Express is basically a fancy, excuse me, dynamic, bus stop meant to pull in consumers who otherwise never think of Uber-ing to work. If anything, Uber is trying to get people think of it as convenient, cost-saving utility versus a commodity. Obviously, traditional public transportation is more environmentally friendly than ride sharing, but who wants to give up the convenience of traveling faster, with fewer people, and closer to your actual destination? I think Pool Express will be a hit, but rather than congratulating Uber for reinventing the wheel, why not just ride the bus?

[The Verge]

via Gizmodo
I Tried Uber’s New ‘Pool Express’ Service And Honestly, Just Take a Bus