Posts

It is what you would call a SaaS style operations monitoring service I now have an environment where I can use Datadog, so I am thinking of migrating from my Zabbix server. Since it is just the Zabbix server being replaced by Datadog’s service and zabbix-agent being replaced by datadog-agent, anyone who uses Zabbix should be able to grasp how it works. Once you register an account on the Datagog side so that you can use it, install Datadog-agent on the machines of each platform and start it, you will be able to view beautiful visualized graphs in no time at all. As for installing datadog-agent, various platforms are provided, but most people probably run it on CentOS or Debian Linux. Installation is easy too, with what is pretty much a one-liner command [Read More]

When you use DockerHub , you see instructions written in the style of “run docker run … to start it”, don’t you. And then there are many occasions where you want to fold that docker run … into docker-compose. If you are used to YAML or TOML in the docker-compose format, you can simply write the version, put down the service name and then fill in the contents of the service, but lining up the indentation and so on really is a hassle. [Read More]

This is a follow-up to Building a mail server with Sakura VPS + Docker + Freenom , in which I tighten up the security a little If the server from last time is running under docker, stop it Copy $ docker-compose down Closing imap and submission In the previous article I confirmed that imaps and smtps communication works, so I close imap and submission docker-compose.yml (only the changed parts are shown) [Read More]

TL;DR I tried building a mail server with Docker on a Sakura VPS I will skip registering a domain on Freenom and how to use Cloudflare Linux(Debian10) Docker is assumed to be already installed A domain name has been obtained from Freenom and registered in a DNS such as Cloudflare Freenom : example.com (fictitious name) Sakura VPS: 11.22.33.44 (fictitious IP) For this server build I referred to the sites below [Read More]

I updated the Hugo Tranquilpeak theme on a site I run elsewhere from 0.4.x to 0.5.x From 0.5BETA onwards a number of fixes were required, so here are my notes The current Tranquilpeak The theme is managed as a submodule, and I was using 0.4.x Copy $ pwd ~/hugo/tranquilpeak $ git submodule status e1d2c5d5cb1efb687ed698782f99df576e7db084 themes/tranquilpeak (0.4.8-BETA) Updating to 0.5-BETA Copy $ git submodule update --remote remote: Enumerating objects: 496, done. remote: Counting objects: 100% (493/493), done. remote: Compressing objects: 100% (164/164), done. remote: Total 496 (delta 308), reused 472 (delta 296), pack-reused 3 Receiving objects: 100% (496/496), 214.68 KiB | 7.95 MiB/s, done. Resolving deltas: 100% (308/308), completed with 90 local objects. From https://github.com/kakawait/hugo-tranquilpeak-theme e1d2c5d..37550aa master -> origin/master + 4243bcf...8223447 develop -> origin/develop (forced update) * [new branch] fix-fancybox-3-data-model -> origin/fix-fancybox-3-data-model a065336..902f360 gh-pages -> origin/gh-pages * [new tag] 0.5.0-BETA -> 0.5.0-BETA Submodule path 'themes/tranquilpeak': checked out '37550aa165eec033e34f2e0f89cb0720d72a4c34' Changes and key points To show posts on the front page, mainSection has to be specified explicitly (I was showing the list of posts on the front page, so nothing appeared unless mainSection was filled in) highlight, jQery, prism and font-awesome have each been upgraded, so entries that load the CDN URLs via [[params.customJS]] are needed The notation changed because font-awesome went from 4 to 5 (v5 notation) A timezone parameter was added in hugo0.87, so I added timezone = "Asia/Tokyo" (it is not mandatory, and you need to have updated hugo to 0.87 or later) Fixing config.toml The quickest way is to copy the config.toml inside themes/tranquilpeak/exampleSite and change only the parts you need [Read More]

TR;DR Assume that Growi is running on docker with the configuration below App Version Growi 4.2.21 mongodb 3.6 There are major changes from Growi 4.3 onwards, so when you upgrade from 4.2 or earlier to 4.3, look through the official articles first And be sure to take a backup before starting the work! Updating mongodb Up to Growi 4.2.x it could also run on mongodb 3.x, but 4.3 requires mongodb 4.4, so mongodb has to be updated I did the work of updating mongodb in the order 3.6->4.0->4.2->4.4 [Read More]

On my home server I run several nginx-proxy Docker containers, and I also make them accessible from outside on my own domain. Of course, on the fiber router facing the WAN I have ports 80 and 443 open, and connectivity from outside is confirmed. In this kind of setup, a symptom where access from outside was not possible started happening at irregular intervals Symptoms When the problem shows up from outside, access becomes impossible with a 403 Fobidden like the one below [Read More]

I want to install msmtp on Debian10 and send mail through Gmail’s SMTP server msmtp On hosts that only send mail I used to use sSMTP a lot, but on Debian10 there is no ssmtp package. The replacement for it is msmtp Installing msmtp Copy # apt install msmtp msmtp-mta Configuration There is no configuration file in /etc, so copy the sample Copy # cp /usr/share/doc/msmtp/examples/msmtprc-system.example /etc/msmtprc Incidentally, for a per-user configuration it is [Read More]

Symptoms I run several servers in Docker containers with Vagrant on my Mac, but the guest OS I had started with Vagrant stopped coming up, and neither vagrant ssh nor vagrant halt worked any more. Copy $ vagrant halt The provider 'virtualbox' that was requested to back the machine 'default' is reporting that it isn't usable on this system. The reason is shown below: Vagrant could not detect VirtualBox! Make sure VirtualBox is properly installed. Vagrant uses the `VBoxManage` binary that ships with VirtualBox, and requires this to be available on the PATH. If VirtualBox is installed, please find the `VBoxManage` binary and add it to the PATH environmental variable. VirtualBox cannot be found? Did it disappear? [Read More]

On this site I manage the Hugo Beautifulhuigo theme as a submodule on Gitlab. From time to time the upstream submodue theme gets updated, but git clone and git push do not update the submodule automatically So it has to be updated by hand, and since this is work I do often, I am writing it down as a note Cloning my own repository Copy $ git clone --recurse-submodules --depth 1 https://gitlab.com/user/repo.git $ cd repo Updating the submodule The only thing you actually have to do is git submodule update --remote [Read More]