Question

我正在尝试使用 Docker 容器升级 PostgreSQL。在升级过程中，我收到一个错误：

connection to database failed: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/tmp/upgrade/.s.PGSQL.50432"?"

如果您对此问题有任何帮助，我将不胜感激。

我的 Dockerfile 包含：

FROM postgres:13
ENV PG_MAJOR=13
ENV PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/lib/postgresql/13/bin
EXPOSE 5432
RUN mkdir -p /var/run/postgresql  \
        && chown -R postgres:postgres /var/run/postgresql  \
        && chmod 2777 /var/run/postgresql
ENV PGBINNEW /usr/lib/postgresql/13/bin
ENV PGBINOLD /usr/lib/postgresql/11/bin
ENV PGDATAOLD /var/lib/postgresql/11/data
ENV PGDATANEW /var/lib/postgresql/13/data
ENV PG_VERSION=13.3-1.pgdg100+1
RUN mkdir -p "$PGDATAOLD" "$PGDATANEW" \
        && chown -R postgres:postgres /var/lib/postgresql
RUN mkdir -p /var/log
WORKDIR /var/lib/postgresql
COPY docker-upgrade /usr/local/bin/
RUN mkdir -p /var/log
RUN touch /var/log/postgresql.log
RUN chmod 777 -R /var/log/
RUN chmod 777 -R /var/log/postgresql.log
RUN chmod 777 -R /usr/local/bin/docker-upgrade

ENTRYPOINT docker-upgrade

# recommended: --link
CMD pg_upgrade

我使用以下命令运行它：

docker run                                         \
  -w /tmp/upgrade                                  \
  -v "../data/postgres-$NEW-upgrade:/tmp/upgrade"  \
  -v "../11.1/data:/var/lib/postgresql/11/data"    \ # old dir
  -v "../13/data/:/var/lib/postgresql/13/data"     \ # new Dir
  -v /usr/pgsql-11/bin/:/usr/lib/postgresql/11/bin \ # old 11 binary at host machine e 
  "pgupgrade"

我的升级日志说：

Performing Consistency Checks
-----------------------------
Checking cluster versions                                   ok

*failure*
Consult the last few lines of "pg_upgrade_server.log" for
the probable cause of the failure.

connection to database failed: could not connect to server: No such file or directory
    Is the server running locally and accepting
    connections on Unix domain socket "/tmp/upgrade/.s.PGSQL.50432"?

could not connect to source postmaster started with the command:
"/usr/lib/postgresql/11/bin/pg_ctl" -w -l "pg_upgrade_server.log" -D "/var/lib/postgresql/11/data" -o "-p 50432 -b  -c listen_addresses='' -c unix_socket_permissions=0700 -c unix_socket_directories='/tmp/upgrade'" start
Failure, exiting

postgres_server_log (pg_upgrade)

/usr/lib/postgresql/11/bin/postgres: error while loading shared libraries: libssl.so.10: cannot open shared object file: No such file or directory
no data was returned by command ""/usr/lib/postgresql/11/bin/postgres" -V"
The program "postgres" is needed by pg_ctl but was not found in the
same directory as "/usr/lib/postgresql/11/bin/pg_ctl".
Check your installation.

Answer 1

看起来您已经发现了问题：

/usr/lib/postgresql/11/bin/postgres: error while loading shared libraries:
libssl.so.10: cannot open shared object file: No such file or directory

您的 postgresql 11 二进制文件需要一个在 postgres:13 映像中不可用的 openessl 版本。这可能是由于 Debian 版本 9（用于 postgres:11 映像）和 Debian 版本 10（用于 postgres:13 映像）之间的重大变化。

解决此问题的最简单方法是从 postgres:13 图像中可用的软件包，而不是尝试从您的主机安装它们。

考虑将您的 Dockerfile 修改为如下所示：

FROM postgres:13

# Install binaries for postgresql 11
RUN apt update && apt install -y postgresql-11 postgresql-12

COPY docker-upgrade.sh /usr/local/bin/docker-upgrade.sh
RUN chmod 755 /usr/local/bin/docker-upgrade.sh

这里我安装了 postgres 11 版和 12 版，因为这样我们就可以使用相同的图像从 11 -> 12、11 -> 13 或 12 -> 13 升级。

我的 docker-upgrade.sh 看起来像这样：

#!/bin/sh

PGBINNEW=/usr/lib/postgresql/$PGNEW/bin
PGBINOLD=/usr/lib/postgresql/$PGOLD/bin

export PGBINNEW PGBINOLD

PGDATANEW=/var/lib/postgresql/$PGNEW
PGDATAOLD=/var/lib/postgresql/$PGOLD

export PGDATANEW PGDATAOLD

chown postgres:postgres $PGDATANEW
chmod 750 $PGDATANEW
runuser -u postgres -- initdb $PGDATANEW

cd $PGDATANEW
runuser -u postgres -- pg_upgrade

在我的系统上，我使用 Dockerfile 和脚本：

pgupdgrade

综合起来，假设我们在一个卷中有旧数据名为 docker build -t pgupgrade .，我可以创建一个新的 pgdata12 卷通过像这样运行 pgdata13 图像来升级数据：

pgupdate

这将使用 docker run --rm \ -v pgdata12:/var/lib/postgresql/12 \ -v pgdata13:/var/lib/postgresql/13 \ -e PGNEW=13 \ -e PGOLD=12 \ pgupgrade docker-upgrade.sh 初始化新卷，然后运行 initdb 过程。一旦容器退出，我就可以启动一个新的使用 pg_upgrade 卷的 postgres 13 容器：

pgdata13

Postgres Docker 升级失败，连接到数据库失败：无法连接到服务器：没有这样的文件或目录

1 个答案: