ERROR: unsatisfiable constraints using apk in dockerfile

Question

我正在尝试将 postgis 安装到 postgres 容器中。 Dockerfile:

FROM postgres:9.6.4-alpine

RUN apk update \
    && apk add -u postgresql-9.6-postgis-2.4 postgresql-9.6-postgis-2.4-scripts \
    && rm -rf /var/lib/apt/lists/*

COPY ./scripts/postgis.sh  /docker-entrypoint-initdb.d/postgis.sh

postgis.sh:

#!/bin/sh

for DB in $(psql -t -c  "SELECT datname from pg_database where datname = 'backend'"); do
    echo "Loading PostGIS extensions into $DB"
    "${psql[@]}" --dbname="$DB" <<-'EOSQL'
        CREATE EXTENSION IF NOT EXISTS postgis;
EOSQL
done

我收到这个错误：

ERROR: unsatisfiable constraints: postgresql-9.6-postgis-2.4 (missing): required by: world[postgresql-9.6-postgis-2.4] postgresql-9.6-postgis-2.4-scripts (missing): required by: world[postgresql-9.6-postgis-2.4-scripts] The command '/bin/sh -c apk update && apk add -u postgresql-9.6-postgis-2.4 postgresql-9.6-postgis-2.4-scripts && rm -rf /var/lib/apt/lists/*' returned a non-zero code: 2

我发现了类似的问题，例如：

错误：无法满足的约束：在 alpine 中安装包时

但这并没有解决我的问题 problem.How 我可以使用 apk 将 postgis 扩展添加到我的 postgres 容器吗？

Answer 1

Postgis 软件包仅在 edge alpine repo 中可用，在稳定的 repo 中不可用。这就是您收到 "unsatisfiable constraints" 错误的原因。

但无论如何你可以从 edge repo 安装 postgis:

# echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories

# apk update
fetch http://dl-cdn.alpinelinux.org/alpine/v3.5/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.5/community/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/edge/testing/x86_64/APKINDEX.tar.gz
WARNING: This apk-tools is OLD! Some packages might not function properly.
v3.5.2-254-g9d4623dc57 [http://dl-cdn.alpinelinux.org/alpine/v3.5/main]
v3.5.2-247-gc85efb30e1 [http://dl-cdn.alpinelinux.org/alpine/v3.5/community]
v3.7.0-2163-ge03552fc58 [http://dl-cdn.alpinelinux.org/alpine/edge/testing]
OK: 10930 distinct packages available

# apk search --no-cache postgis
fetch http://dl-cdn.alpinelinux.org/alpine/v3.5/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.5/community/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/edge/testing/x86_64/APKINDEX.tar.gz
WARNING: This apk-tools is OLD! Some packages might not function properly.
postgis-dev-2.4.1-r1
postgis-2.4.1-r1
postgis-doc-2.4.1-r1

所以，最后的Dockerfile是：

FROM postgres:9.6.4-alpine

RUN echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing" >> /etc/apk/repositories

RUN apk update \
    && apk add -u postgis \
    && rm -rf /var/lib/apt/lists/*

COPY ./scripts/postgis.sh  /docker-entrypoint-initdb.d/postgis.sh

2020 年 1 月 23 日更新：

Postgis 从 Alpine 版本 3.11 开始在主要和社区存储库中可用：

/ # cat /etc/os-release
NAME="Alpine Linux"
ID=alpine
VERSION_ID=3.11.3
PRETTY_NAME="Alpine Linux v3.11"
HOME_URL="https://alpinelinux.org/"
BUG_REPORT_URL="https://bugs.alpinelinux.org/"
/ #
/ # apk search --no-cache postgis
fetch http://dl-cdn.alpinelinux.org/alpine/v3.11/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.11/community/x86_64/APKINDEX.tar.gz
postgis-3.0.0-r1
postgis-doc-3.0.0-r1

对于 Alpine 版本 3.11 及更高版本，您不需要使用边缘回购测试分支。

Answer 2

旧：

apk add --no-cache curl jq python py-pip

新：

apk add --no-cache curl jq python3 py3-pip

Answer 3

这很奇怪，但在我的案例中，解决方案很简单运行:

sudo systemctl restart docker

... 在您运行宁 docker 容器

的机器上

ERROR: unsatisfiable constraints using apk in dockerfile

ERROR: unsatisfiable constraints using apk in dockerfile

docker

alpine

alpine-package-keeper