2.6.0 Beta4 更新失败，出现类似 db 错误

支持 安装
1

Hi,

I just tried doing a command line ‘launcher rebuild app’ to update from 2.6.0.beta3 (7afb5be5f9), which has been running fine for a while, to 2.6.0.beta4 (as of 20 minutes ago). This is how I usually do my updates.

The update failed, please see output below. I tried running launcher rebuild once more, but it failed with the same error. Next I ran discourse-doctor, which also errored out on the rebuild, but which managed to start Discourse back up on 2.6.0.beta3.

Just to recap that last bit: I’m back up on 2.6.0.beta3 and the site is functioning. But I’m not about to try an update to 2.6.0.beta4 again until I understand what happened.

The launcher output says “database system was interrupted”, but Discourse was up and running fine when I started the launcher rebuild command.

Discourse resides on AWS EFS, so has virtually unlimited space. The server has 32 GB of memory, which is plenty for this site (about 1.3 million pageviews/month).

Appreciate any help and pointers in figuring this out.

Here’s the full output log from running rebuild:

gunnar@dewis:/var/discourse$ sudo ./launcher rebuild app

WARNING: We are about to start downloading the Discourse base image
This process may take anywhere between a few minutes to an hour, depending on your network speed

Please be patient

2.0.20201004-2310: Pulling from discourse/base
Digest: sha256:076ad6f035d7f38e08a2d4fdd4f429ad7a40a9cc72d9958445261cdb9e743d26
Status: Downloaded newer image for discourse/base:2.0.20201004-2310
docker.io/discourse/base:2.0.20201004-2310
Ensuring launcher is up to date
Fetching origin
remote: Enumerating objects: 15, done.
remote: Counting objects: 100% (15/15), done.
remote: Compressing objects: 100% (12/12), done.
remote: Total 15 (delta 5), reused 9 (delta 3), pack-reused 0
Unpacking objects: 100% (15/15), done.
From https://github.com/discourse/discourse_docker
   1b97cb1..468f1f9  master                 -> origin/master
 * [new branch]      imagemagick-policy-xml -> origin/imagemagick-policy-xml
Updating Launcher...
Updating 1b97cb1..468f1f9
Fast-forward
 samples/mail-receiver.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
Launcher updated, restarting...
Ensuring launcher is up to date
Fetching origin
Launcher is up-to-date
Stopping old container
+ /usr/bin/docker stop -t 60 app
app
cd /pups && git pull && /pups/bin/pups --stdin
Already up to date.
I, [2020-10-19T18:46:41.157056 #1]  INFO -- : Loading --stdin
I, [2020-10-19T18:46:41.162007 #1]  INFO -- : > locale-gen $LANG && update-locale
I, [2020-10-19T18:46:41.197444 #1]  INFO -- : Generating locales (this might take a while)...
Generation complete.

I, [2020-10-19T18:46:41.197650 #1]  INFO -- : > mkdir -p /shared/postgres_run
I, [2020-10-19T18:46:41.202176 #1]  INFO -- : 
I, [2020-10-19T18:46:41.202375 #1]  INFO -- : > chown postgres:postgres /shared/postgres_run
I, [2020-10-19T18:46:41.208709 #1]  INFO -- : 
I, [2020-10-19T18:46:41.208877 #1]  INFO -- : > chmod 775 /shared/postgres_run
I, [2020-10-19T18:46:41.215819 #1]  INFO -- : 
I, [2020-10-19T18:46:41.215957 #1]  INFO -- : > rm -fr /var/run/postgresql
I, [2020-10-19T18:46:41.219629 #1]  INFO -- : 
I, [2020-10-19T18:46:41.219800 #1]  INFO -- : > ln -s /shared/postgres_run /var/run/postgresql
I, [2020-10-19T18:46:41.222805 #1]  INFO -- : 
I, [2020-10-19T18:46:41.222936 #1]  INFO -- : > socat /dev/null UNIX-CONNECT:/shared/postgres_run/.s.PGSQL.5432 || exit 0 && echo postgres already running stop container ; exit 1
2020/10/19 18:46:41 socat[27] E connect(6, AF=1 "/shared/postgres_run/.s.PGSQL.5432", 36): Connection refused
I, [2020-10-19T18:46:41.237039 #1]  INFO -- : 
I, [2020-10-19T18:46:41.237173 #1]  INFO -- : > rm -fr /shared/postgres_run/.s*
I, [2020-10-19T18:46:41.292499 #1]  INFO -- : 
I, [2020-10-19T18:46:41.292674 #1]  INFO -- : > rm -fr /shared/postgres_run/*.pid
I, [2020-10-19T18:46:41.304292 #1]  INFO -- : 
I, [2020-10-19T18:46:41.304434 #1]  INFO -- : > mkdir -p /shared/postgres_run/12-main.pg_stat_tmp
I, [2020-10-19T18:46:41.310575 #1]  INFO -- : 
I, [2020-10-19T18:46:41.310782 #1]  INFO -- : > chown postgres:postgres /shared/postgres_run/12-main.pg_stat_tmp
I, [2020-10-19T18:46:41.317554 #1]  INFO -- : 
I, [2020-10-19T18:46:41.322287 #1]  INFO -- : File > /etc/service/postgres/run  chmod: +x  chown: 
I, [2020-10-19T18:46:41.326660 #1]  INFO -- : File > /etc/service/postgres/log/run  chmod: +x  chown: 
I, [2020-10-19T18:46:41.330737 #1]  INFO -- : File > /etc/runit/3.d/99-postgres  chmod: +x  chown: 
I, [2020-10-19T18:46:41.334906 #1]  INFO -- : File > /root/upgrade_postgres  chmod: +x  chown: 
I, [2020-10-19T18:46:41.335100 #1]  INFO -- : > chown -R root /var/lib/postgresql/12/main
I, [2020-10-19T18:46:42.155381 #1]  INFO -- : 
I, [2020-10-19T18:46:42.155536 #1]  INFO -- : > [ ! -e /shared/postgres_data ] && install -d -m 0755 -o postgres -g postgres /shared/postgres_data && sudo -E -u postgres /usr/lib/postgresql/12/bin/initdb -D /shared/postgres_data || exit 0
I, [2020-10-19T18:46:42.157629 #1]  INFO -- : 
I, [2020-10-19T18:46:42.157703 #1]  INFO -- : > chown -R postgres:postgres /shared/postgres_data
I, [2020-10-19T18:47:06.520719 #1]  INFO -- : 
I, [2020-10-19T18:47:06.520876 #1]  INFO -- : > chown -R postgres:postgres /var/run/postgresql
I, [2020-10-19T18:47:06.523564 #1]  INFO -- : 
I, [2020-10-19T18:47:06.523706 #1]  INFO -- : > /root/upgrade_postgres
I, [2020-10-19T18:47:06.540126 #1]  INFO -- : 
I, [2020-10-19T18:47:06.540286 #1]  INFO -- : > rm /root/upgrade_postgres
I, [2020-10-19T18:47:06.542555 #1]  INFO -- : 
I, [2020-10-19T18:47:06.543828 #1]  INFO -- : Replacing data_directory = '/var/lib/postgresql/12/main' with data_directory = '/shared/postgres_data' in /etc/postgresql/12/main/postgresql.conf
I, [2020-10-19T18:47:06.544330 #1]  INFO -- : Replacing (?-mix:#?listen_addresses *=.*) with listen_addresses = '*' in /etc/postgresql/12/main/postgresql.conf
I, [2020-10-19T18:47:06.545027 #1]  INFO -- : Replacing (?-mix:#?synchronous_commit *=.*) with synchronous_commit = $db_synchronous_commit in /etc/postgresql/12/main/postgresql.conf
I, [2020-10-19T18:47:06.545814 #1]  INFO -- : Replacing (?-mix:#?shared_buffers *=.*) with shared_buffers = $db_shared_buffers in /etc/postgresql/12/main/postgresql.conf
I, [2020-10-19T18:47:06.546523 #1]  INFO -- : Replacing (?-mix:#?work_mem *=.*) with work_mem = $db_work_mem in /etc/postgresql/12/main/postgresql.conf
I, [2020-10-19T18:47:06.547230 #1]  INFO -- : Replacing (?-mix:#?default_text_search_config *=.*) with default_text_search_config = '$db_default_text_search_config' in /etc/postgresql/12/main/postgresql.conf
I, [2020-10-19T18:47:06.547896 #1]  INFO -- : > install -d -m 0755 -o postgres -g postgres /shared/postgres_backup
I, [2020-10-19T18:47:06.561717 #1]  INFO -- : 
I, [2020-10-19T18:47:06.562046 #1]  INFO -- : Replacing (?-mix:#?checkpoint_segments *=.*) with checkpoint_segments = $db_checkpoint_segments in /etc/postgresql/12/main/postgresql.conf
I, [2020-10-19T18:47:06.562327 #1]  INFO -- : Replacing (?-mix:#?logging_collector *=.*) with logging_collector = $db_logging_collector in /etc/postgresql/12/main/postgresql.conf
I, [2020-10-19T18:47:06.563080 #1]  INFO -- : Replacing (?-mix:#?log_min_duration_statement *=.*) with log_min_duration_statement = $db_log_min_duration_statement in /etc/postgresql/12/main/postgresql.conf
I, [2020-10-19T18:47:06.564238 #1]  INFO -- : Replacing (?-mix:^#local +replication +postgres +peer$) with local replication postgres  peer in /etc/postgresql/12/main/pg_hba.conf
I, [2020-10-19T18:47:06.564505 #1]  INFO -- : Replacing (?-mix:^host.*all.*all.*127.*$) with host all all 0.0.0.0/0 md5 in /etc/postgresql/12/main/pg_hba.conf
I, [2020-10-19T18:47:06.565039 #1]  INFO -- : > HOME=/var/lib/postgresql USER=postgres exec chpst -u postgres:postgres:ssl-cert -U postgres:postgres:ssl-cert /usr/lib/postgresql/12/bin/postmaster -D /etc/postgresql/12/main
I, [2020-10-19T18:47:06.566806 #1]  INFO -- : > sleep 5
2020-10-19 18:47:06.629 UTC [50] LOG:  starting PostgreSQL 12.4 (Debian 12.4-1.pgdg100+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit
2020-10-19 18:47:06.629 UTC [50] LOG:  listening on IPv4 address "0.0.0.0", port 5432
2020-10-19 18:47:06.629 UTC [50] LOG:  listening on IPv6 address "::", port 5432
2020-10-19 18:47:06.665 UTC [50] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
2020-10-19 18:47:07.211 UTC [53] LOG:  database system was interrupted; last known up at 2020-10-19 18:40:46 UTC
I, [2020-10-19T18:47:11.568937 #1]  INFO -- : 
I, [2020-10-19T18:47:11.569207 #1]  INFO -- : > su postgres -c 'createdb discourse' || true
2020-10-19 18:47:11.636 UTC [57] postgres@postgres FATAL:  the database system is starting up
2020-10-19 18:47:11.638 UTC [58] postgres@template1 FATAL:  the database system is starting up
createdb: error: could not connect to database template1: FATAL:  the database system is starting up
I, [2020-10-19T18:47:11.640042 #1]  INFO -- : 
I, [2020-10-19T18:47:11.640270 #1]  INFO -- : > su postgres -c 'psql discourse -c "create user discourse;"' || true
2020-10-19 18:47:11.704 UTC [69] postgres@discourse FATAL:  the database system is starting up
psql: error: could not connect to server: FATAL:  the database system is starting up
I, [2020-10-19T18:47:11.706232 #1]  INFO -- : 
I, [2020-10-19T18:47:11.706429 #1]  INFO -- : > su postgres -c 'psql discourse -c "grant all privileges on database discourse to discourse;"' || true
2020-10-19 18:47:11.761 UTC [80] postgres@discourse FATAL:  the database system is starting up
psql: error: could not connect to server: FATAL:  the database system is starting up
I, [2020-10-19T18:47:11.763159 #1]  INFO -- : 
I, [2020-10-19T18:47:11.763357 #1]  INFO -- : > su postgres -c 'psql discourse -c "alter schema public owner to discourse;"'
2020-10-19 18:47:11.818 UTC [91] postgres@discourse FATAL:  the database system is starting up
psql: error: could not connect to server: FATAL:  the database system is starting up
I, [2020-10-19T18:47:11.819734 #1]  INFO -- : 
I, [2020-10-19T18:47:11.819998 #1]  INFO -- : Terminating async processes
I, [2020-10-19T18:47:11.820025 #1]  INFO -- : Sending INT to HOME=/var/lib/postgresql USER=postgres exec chpst -u postgres:postgres:ssl-cert -U postgres:postgres:ssl-cert /usr/lib/postgresql/12/bin/postmaster -D /etc/postgresql/12/main pid: 50
2020-10-19 18:47:11.820 UTC [50] LOG:  received fast shutdown request
I, [2020-10-19T18:47:21.820568 #1]  INFO -- : HOME=/var/lib/postgresql USER=postgres exec chpst -u postgres:postgres:ssl-cert -U postgres:postgres:ssl-cert /usr/lib/postgresql/12/bin/postmaster -D /etc/postgresql/12/main pid:50 did not terminate cleanly, forcing termination!


FAILED
--------------------
Pups::ExecError: su postgres -c 'psql discourse -c "alter schema public owner to discourse;"' failed with return #<Process::Status: pid 81 exit 2>
Location of failure: /pups/lib/pups/exec_command.rb:112:in `spawn'
exec failed with the params "su postgres -c 'psql $db_name -c \"alter schema public owner to $db_user;\"'"
809e00dc988196b9a3c0bfe215ff0ba30fa00056e1d2ad92818bc6b9d911df62
** FAILED TO BOOTSTRAP ** please scroll up and look for earlier error messages, there may be more than one.
./discourse-doctor may help diagnose the problem.
gunnar@dewis:/var/discourse$
2

这是一个非常奇特的选择。为什么不使用 RDS 呢？

当容器未正常关闭时会出现此情况，因此 PostgreSQL 在下次启动时必须执行恢复过程。

这通常发生得非常快，但如果你的数据库很大（你的情况）和/或磁盘速度很慢（确实也是你的情况），这个过程可能会太慢，导致我们的重建脚本不知所措。

一个简单的恢复方法是再次使用 ./launcher start app 启动容器，让它正常运行一段时间（比如 1 小时），然后再尝试重建。

3

因为我完全不知道该如何开始实施。不过，这确实是个有趣的想法。

EFS 只是一个文件系统，所以很容易实现。而且对于我们的使用场景来说，它的速度也足够快，至少我是这么认为的。

没错，我也是这么想的。有趣的是，当我启动 launcher 时，Discourse 已经运行了一段时间。所以，实际上是 launcher 脚本本身关闭了 PostgreSQL。

好的，我会试试。谢谢！

4

您知道上一次重建是什么时候吗？

我在 wait a bit more if necessary for container stop · discourse/discourse_docker@49ed141 · GitHub 中增加了等待数据库优雅关闭的时间。如果您在该提交之前，这是一个常见问题。

5

不太确定，但肯定是在五月之后，因为我看到那个变更已经提交。可能大概是一个月前。你甚至可以在上面的输出中看到 “-t 60”。

我刚刚又尝试了一次重建，这次成功完成了。我想以后在点击重建之前，我得先检查一下，确保 PostgreSQL 处于空闲或接近空闲状态。

感谢你的所有帮助！

6

真不知道我怎么会漏掉这个 :man_facepalming:。

你还记得那个步骤是否足足花了 60 秒，然后在那之后继续执行吗？

太好了！

7

我不能完全确定，但我相当肯定它没有花到 60 秒那么久。下次重建时，我会更留意这一点。