Merge remote-tracking branch 'upstream/master' into new-design

content/u/blog/how-to-sustainable-store-your-data/contents.lr

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+title: How to store your data without CO2 emission
+---
+pub_date: 2019-11-20
+---
+author: ungleich
+---
+twitter_handle: ungleich
+---
+_hidden: no
+---
+_discoverable: yes
+---
+abstract:
+Avoiding CO2 emissions in data storage is a daily task, too
+---
+body:
+
+When we talk about climate change or sustainability, we usually think
+about factories or cars. What we usually don't anticipate is how much
+we actually contribute to the climate change by our digital behaviour.
+
+## How data is stored
+
+Your data is usually stored in one of the many data centers in the
+world. To save your data, multiple disk or even multiple servers are
+used to ensure that your data is safely stored.
+
+When you open up your mobile phone to browse pictures or to read your
+email, you access the servers to retrieve your data.
+
+## How data centers are operated
+
+Most data centers use energy from the grid. This energy can be either
+produced by coal, nuclear power or renewable energy. Unfortunately,
+most of them don't run on renewable energy. Some do buy CO2
+certificates to compensate this fact.
+
+Energy in a data center is spent on one side for actually running the
+servers that store your data and on cooling on the other hand. The
+amount of energy used for cooling can be quite significant, too.
+
+So even if you are living a very green and sustainable way, you might
+be contributing to CO2 emissions by using your default data storage.
+
+## An alternative: the sustainable way of saving data
+
+So how can we tackle this situation?
+We have worked hard here in Switzerland to create the [Data Center
+Light](https://datacenterlight.ch), a complete alternative
+approach to save as much CO2 emissions, as possible.
+
+And this is how it is done:
+
+* instead of buying certificates, we use 100% renewable energy
+* instead of buying energy, we produce it locally (using PV and a
+local hydro power plant)
+* instead of building new data centers, we modernise existing factory
+  halls
+* instead of buying new servers, we buy 2nd hand (with new disks/ssds)
+
+## The sustainable data center
+
+With this approach, there is practically no CO2 emission from power
+consumption and also the grey energy is minimised. The team of
+[ungleich](https://ungleich.ch) is very proud to offer a variety of
+products that are built with sustainability in mind:
+
+* [Sustainable Data Storage: Glarnercloud](https://ungleich.ch/en-us/cms/glarnercloud/)
+* [Sustainable Virtual Private Servers: Data Center Light](https://datacenterlight.ch)
+* [Sustainable IPv6 only VPS: IPv6 Only Hosting](https://ipv6onlyhosting.com/)
+* [Sustainable IPv6 VPNs: IPv6VPN](https://ipv6vpn.ch)
+* [Sustainable IPv6 Backup](https://ungleich.ch/en-us/cms/ipv6-backup/)
+
+In our opinion, we can only reach sustainability, if we take actions
+in all fields of our daily life.
+
+In case you are looking for an affordable way of testing the products,
+you should not miss the [Black IPv6
+Friday](https://swiss-crowdfunder.com/campaigns/black-ipv6-friday?locale=en),
+which has *up to 50% discount on the products*.
+
+If you have any questions or comemnts, you can reach us at
+**sustainability at ungleich.ch** or in the [ungleich
+chat](https://chat.ungleich.ch).

content/u/blog/running-world-reachable-containers-on-your-notebook-with-ipv6/contents.lr

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+title: How to run world reachable docker containers on your notebook
+---
+pub_date: 2019-11-20
+---
+author: Nico Schottelius
+---
+twitter_handle: NicoSchottelius
+---
+_hidden: no
+---
+_discoverable: yes
+---
+abstract:
+With IPv6, you can do so many things faster than before
+---
+body:
+
+Today [Alain](https://github.com/munen/)
+from [200ok](https://200ok.ch/) and me were hacking in the
+[Hacking Hotel Diesbach](https://hack.digitalglarus.ch/) and found an
+interesting problem: the docker containers on Alain's notebook did not
+reach the Internet.
+
+## IPv6 only networks
+
+It turns out that here in the Hacking Hotel, we are in an IPv6 only
+network and docker by default assigns IPv4 addresses to
+containers. This obviously does not work, because there is no IPv4
+connectivity in an IPv6 only network...
+
+## Turning the problem into a feature
+
+...being in the Hacking Hotel means being inside the
+*2a0a:e5c0:10::/48* network. The nice thing about IPv6 is that you
+have a lot of space. With the /48 network, we have around 65'536 /64
+sub networks. But enough from the IPv6 love...
+
+... what this means is that we can just route a /64 network to Alain's
+notebook and reconfigure his docker daemon to use IPv6 instead of
+IPv4. Simply creating the **/etc/docker/daemon.json** with the
+following content is enough:
+
+```json
+{
+  "ipv6": true,
+  "fixed-cidr-v6": "2a0a:e5c0:10:f00::/64"
+}
+```
+
+This is great, as long as we work in the Hacking Hotel...
+
+## And turning it into a demo ready state
+
+The problem with our solution above is that the network is only routed
+to his notebook, when he is in the Hacking Hotel and it will not work
+outside.
+
+Alain also has a VPN from [IPv6VPN.ch](https://IPv6VPN.ch) that
+gives him a static /48 network to his notebook. Now we selected a
+/64 subnet and what does it give?
+
+**World wide reachable docker containers** on a notebook!
+
+Isn't that sweet? Given the right firewall settings, the containers
+can now be reached from anywhere in the world. From a notebook, which
+can be anywhere else in the world.
+
+## More of this
+
+If you like hacking with IPv6, or to reproduce the docker setup above,
+you are invited to join the  [IPv6 Chat](https://IPv6.chat)
+or to get yourself a 50% off deal on the [Black IPv6
+Friday](https://swiss-crowdfunder.com/campaigns/black-ipv6-friday?locale=en)
+campaign.