Route & Redirect with envoy

By Maximilian Batz | 2019-01-17

An example envoy.yaml showing how to route & redirect. There are different options, see here https://www.envoyproxy.io/docs/envoy/latest/api-v2/api/v2/route/route.proto#route-redirectaction This envoy.yaml routes /taxgod and /taxgod/ (the second could probably be omitted because the first one should also match it, I think) to a new port and a different protocol. /picockpit is simply redirected to / and then finally…

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Envoy routing and rewriting snippet

By Maximilian Batz | 2019-01-17

It is possible to rewrite URLs with Envoy for the backend. Please note that the HTML output needs to have the proper routes! (That is why I am not going to investigate further in this direction). REF: https://www.envoyproxy.io/docs/envoy/latest/api-v2/api/v2/route/route.proto#route-route  Also note that the string is going to be rendered literally for direct_response –> body –> inline_string,…

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envoy force SSL example envoy.yaml

By Maximilian Batz | 2019-01-17

static_resources:   listeners:   – address:       socket_address:         address: 0.0.0.0         port_value: 80     filter_chains:     – filters:       – name: envoy.http_connection_manager         config:           codec_type: auto           stat_prefix: ingress_http           route_config:             virtual_hosts:             – name: backend               domains: [“*”]               routes:               – match: { prefix: “/” }                 redirect:                   path_redirect: “/”                   https_redirect: true           http_filters:           – name: envoy.router             config: {}   – address:       socket_address:         address: 0.0.0.0         port_value: 443     filter_chains:     – tls_context:        …

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envoy.yaml example for http and https rewriting

By Maximilian Batz | 2019-01-16

This is an early example of working with envoy. I find the documentation to be difficult to get into, therefore I will try to track my progress by infrequent blog posts on the matter. The following envoy.yaml works for me for http and https rewriting to google: static_resources:   listeners:   – address:       socket_address:         address: 0.0.0.0         port_value:…

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Exception: Unexpected quote at 1:2 (CSV::MalformedCSVError) Crystal

By Maximilian Batz | 2019-01-13

While trying to parse an Amazon pay file, I stumbled across this particular problem: Exception: Unexpected quote at 1:2 (CSV::MalformedCSVError) The reason: Amazon Pay encodes it’s files in UTF-8 with BOM. The BOM is an optional (in UTF-8 files) marker. You can see it with the tool xxd for instance xxd apolish_amazon_2018DecMonthlyTransaction.csv | less The…

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Install Crystal on Docker: how to add the Crystal repository to Docker in the Dockerfile

By Maximilian Batz | 2019-01-11

Dockerfile (excerpt) ENV APT_KEY_DONT_WARN_ON_DANGEROUS_USAGE=DontWarn RUN apt-get update && apt-get install -y \          software-properties-common \          build-essential \         libevent-dev \         libssl-dev \         libxml2-dev \         libyaml-dev \         libgmp-dev \         libreadline-dev \         apt-transport-https \         iputils-ping \         git \         aptitude \         nano \         openssh-server \         && apt-key adv –keyserver keys.gnupg.net –recv-keys 09617FD37CC06B54 \         && add-apt-repository ‘deb https://dist.crystal-lang.org/apt crystal…

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Alpine boot process on the Raspberry Pi

By Maximilian Batz | 2019-01-10

Today we will have a look at the Alpine Linux boot process on a Raspberry Pi in some detail. The picture shows the contents of a “virgin” SD card with the Alpine image, which has not been booted yet. This picture shows the contents of the boot folder. Initial boot Stages on the Raspberry Pi…

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