Quan Tong
The power of praise
2021-03-18
K, 9 tuổi.
Dạo này đang luyện: cắm cơm, nhặt rau. Hôm trước học bài mới: gọt su su. Bài này hơi khó hơn chút: đầu tiên dùng dao cắt đúng khía thành các miếng nhỏ, sau đó gọt sạch, cuối cùng là bỏ lõi. Cứ mỗi lần làm xong một miếng, K lại hỏi:
- Thế này được chưa b?
- Chuẩn đấy, b thấy miếng này đẹp hơn miếng trước.
Và đúng là nó đẹp hơn thật. Lời khen đã giúp K làm tốt hơn.
condition form of depends_on in docker-compose version 3
2021-03-05
As version 3 no longer supports the condition form of depends_on, what is the alternative way to wait for a container to be started completely?
From 1.27.0, 2.x and 3.x are merged with COMPOSE_SPEC schema.
version is now optional. So, you can just remove it and specify a condition as before:
1services: 2 web: 3 build: . 4 depends_on: 5 redis: 6 condition: service_healthy 7 redis: 8 image: redis 9 healthcheck: 10 test: ["CMD", "redis-cli", "ping"] 11 interval: 1s 12 timeout: 3s 13 retries: 30
Let's Encrypt too many certificates already issued
2021-02-04
Traefik is configured to use Let’s Encrypt to generate certificate for my blog (and other services) automatically. One day after restarting, I cannot access to my blog via HTTPS anymore (NET::ERR_CERT_AUTHORITY_INVALID). Why?
By looking at the Traefik logs, I found this:
time=“2021-02-04T01:54:33Z” level=error msg=“Unable to obtain ACME certificate for domains \“quantonganh.com\”: unable to generate a certificate for the domains [quantonganh.com]: acme: error: 429 :: POST :: https://acme-v02.api.letsencrypt.org/acme/new-order :: urn:ietf:params:acme:error:rateLimited :: Error creating new order :: too many certificates already issued for exact set of domains: quantonganh.com: see https://letsencrypt.org/docs/rate-limits/, url: “ providerName=le.acme routerName=blog-secured@docker rule=“Host(
quantonganh.com)”
plugins/docker failed to resolve Keycloak hostname?
2021-01-27
After integrating Docker registry with Keycloak, the publishing step failed to authenticate with Docker Registry.
The full error message is:
1time="2021-01-26T13:44:18.485121053Z" level=error msg="Handler for POST /v1.40/auth returned error: Get https://docker.domain.com/v2/: Get https://sso.domain.com/auth/realms/application/protocol/docker-v2/auth?account=******&client_id=docker&offline_token=true&service=aws-docker-registry: dial tcp: lookup sso.domain.com on 127.0.0.11:53: no such host"
sso.domain.com is a local hostname which can be resolved on the host. How can I make it resolvable inside the plugins/docker container?
I found some similar issues:
- https://discourse.drone.io/t/dns-lookup-fails-inside-plugins-docker-build/501/5
- https://github.com/drone-plugins/drone-docker/issues/193
but they are slightly differences.
Look at this: http://plugins.drone.io/drone-plugins/drone-docker/
How to run a pipeline step only when pushing to a new branch?
2021-01-07
GitHub sends push hook when pushing to a new branch and merging a PR. How can we distinguish between them?
We are running integration test by triggering a downstream build when a PR is merged into specific branches. In the downstream repository, we pull all the docker images which has been built and pushed from upstream. The thing is we also used the drone-convert-pathschanged to only publish what modules has been changed.
So, what happens when pushing to a new release-* branch?
How to add full text search to my static website?
2020-12-30
After building the website, I want to add search function. There are some ways to do it:
- ElasticSearch: setup and maintenance cost
- MongoDB: have to insert posts into database
- Google Custom Search Engine: ads?
So, is there any search engine written in Go?
Bleve has more star and be maintained more often than riot, I would like to give it a try first.
Backend
Looking at the documentation, there are three steps to add search to your website:
Unable to obtain ACME certificate for domains
2020-12-28
Lets Encrypt tells me that my domain contains an invalid character. What is it?
remark42 is configured like this:
1 remark42: 2 image: umputun/remark42:arm64 3 container_name: "remark42" 4 restart: always 5 labels: 6 - traefik.enable=true 7 - traefik.http.routers.remark42.rule=Host(`${REMARK_URL}`) 8 - traefik.http.routers.remark42.entrypoints=https 9 - traefik.http.routers.remark42.tls.certresolver=le 10 - traefik.http.services.remark42.loadbalancer.server.port=8080
A && B || C is not the same as if-then-else
2020-12-26
I have been thought that if-then-else statement can be written in one line by using A && B || C but I was wrong.
To speed up my Drone CI time, I configured the static-check step to only run when there are some .go files have been changed:
1git --no-pager diff --name-only ${DRONE_COMMIT_LINK##*/} | grep -q "\.go$" && golangci-lint run --deadline 2m -v ./... || true
I was thought that A && B || C is the same as:
How to perform integration testing in Go?
2020-09-29
Integration testing can be triggered by using Drone downstream plugin:
1steps: 2- name: trigger 3 image: plugins/downstream:linux-amd64 4 settings: 5 params: 6 - COMMIT_BRANCH=${DRONE_COMMIT_BRANCH} 7 repositories: 8 - repo/integration-test@${DRONE_COMMIT_BRANCH} 9 server: https://drone.example.com 10 token: 11 from_secret: drone_token
It can be separated with unit tests by using build tags:
1// +build integration 2 3package webserver_test
Then we can write code to perform integration test as usual.
Duc Ba church
2020-07-28
Duc Ba church, Saigon.