[database] enable userns-remap and make redis process runs as non-root user #15972

maipbui · 2023-07-26T19:54:41Z

Why I did it

Enable user namespace remapping technique for database docker.
Running the Redis server as the "root" user is not recommended. It is suggested that the server should be operated by a non-privileged user.

Work item tracking

Microsoft ADO (number only): 15895240, 17418646

How I did it

Add a userns-remap in the /etc/docker/daemon.json file to enable user namespace remap.
Ensure the Redis process is operating under the 'redis' user in supervisord and adjust the necessary file permissions accordingly.

How to verify it

Built new image, verify redis process is running as 'redis' user and all containers are up. Processes remapped to lower privileged user on host.

Before

admin@sonic:~$ redis-cli PING
PONG
admin@sonic:~$ sonic-db-cli PING
PONG

admin@sonic:~$ ps -ef | grep redis
root        2640    1902 16 18:50 pts/0    00:14:12 /usr/bin/redis-server 127.0.0.1:6379

admin@sonic:~$ docker exec -it database bash
root@sonic:/# ps -ef | grep redis
root          46       1 16 18:50 pts/0    00:14:20 /usr/bin/redis-server 127.0.0.1:6379

root@sonic:/# ls -l /etc/redis/
total 84
-rw-r----- 1 redis redis 85802 Jul 15 15:42 redis.conf

admin@sonic:~$ ls -l /var/run/ | grep redis
drwxr-xr-x  3 root root    100 Jul 29 14:36 redis
drwxr-xr-x  2 root root     40 Jul 28 05:39 redis-chassis

admin@sonic:~$ ls -l /var/run/redis/
total 4
-rw-r--r-- 1 root root   3 Jul 29 14:36 redis.pid
srwxrw---- 1 root redis  0 Jul 29 14:36 redis.sock
drwxr-xr-x 2 root root  60 Jul 29 14:36 sonic-db

root@sonic:/# ls -l /var/run/ | grep redis
drwxr-xr-x 3 root root  100 Jul 29 14:36 redis

root@sonic:/# ls -l /var/run/redis/
total 4
-rw-r--r-- 1 root root  3 Jul 26 18:50 redis.pid
srwxrw---- 1 root 1001  0 Jul 26 18:50 redis.sock
drwxr-xr-x 2 root root 60 Jul 26 18:50 sonic-db

After

admin@vlab-01:~$ redis-cli PING
PONG
admin@vlab-01:~$ sonic-db-cli PING
PONG

admin@vlab-01:~$ ps -e -o pid,uid,gid,user,%cpu,%mem,vsz,rss,tty,stat,start,time,command | grep remap
    775 100000 100000 remapro+ 0.0  0.6 31204 26700 pts/0    Ss+  15:12:19 00:00:00 /usr/bin/python3 /usr/local/bin/supervisord
    908 100000 100000 remapro+ 0.1  0.6 124028 26224 pts/0   Sl   15:12:22 00:00:04 python3 /usr/bin/supervisor-proc-exit-listener --container-name database
    971 100000 100000 remapro+ 0.0  0.1 222184 6028 pts/0    Sl   15:12:23 00:00:00 /usr/sbin/rsyslogd -n -iNONE
   1033 100101 100101 remapre+ 1.8  1.7 124660 68404 pts/0   Sl   15:12:25 00:00:49 /usr/bin/redis-server *:6379
   1037 100000 100000 remapro+ 0.0  0.5 40712 22864 pts/0    S    15:12:25 00:00:00 python3 /usr/local/bin/containercfgd

admin@vlab-01:~$ docker exec -it database bash
root@vlab-01:/# ps -e -o pid,uid,gid,user,%cpu,%mem,vsz,rss,tty,stat,start,time,command
    PID   UID   GID USER     %CPU %MEM    VSZ   RSS TT       STAT  STARTED     TIME COMMAND
      1     0     0 root      0.0  0.6  31204 26700 pts/0    Ss+  15:12:19 00:00:01 /usr/bin/python3 /usr/local/bin/supervisord
     47     0     0 root      0.1  0.6 124028 26224 pts/0    Sl   15:12:22 00:00:05 python3 /usr/bin/supervisor-proc-exit-listener --container-name database
     56     0     0 root      0.0  0.1 222184  6028 pts/0    Sl   15:12:23 00:00:00 /usr/sbin/rsyslogd -n -iNONE
     66   101   101 redis     1.8  1.7 124660 68068 pts/0    Sl   15:12:25 00:00:50 /usr/bin/redis-server *:6379
     70     0     0 root      0.0  0.5  40712 22864 pts/0    S    15:12:25 00:00:00 python3 /usr/local/bin/containercfgd

root@vlab-01:/# ls -l /etc/redis/
total 84
-rw-r----- 1 redis redis 85802 Jul 26 19:13 redis.conf

admin@vlab-01:~$ ls -l /var/run/ | grep remap
drwx------  3 remaproot  remaproot    60 Aug 11 15:12 docker.100000.100000
drwxr-xr-x  2 remaproot  remaproot    40 Aug 11 15:12 docker-syncd
drwxr-xr-x  2 remaproot  remaproot    40 Aug 11 15:14 platform_cache
drwxr-xr-x  3 remapredis remapredis  100 Aug 11 15:12 redis
drwxr-xr-x  2 remaproot  remaproot    40 Aug 11 15:12 redis-chassis

admin@vlab-01:~$ ls -l /var/run/redis/
total 4
-rw-r--r-- 1 remapredis remapredis  3 Aug 11 15:12 redis.pid
srwxrw---- 1 remapredis remapredis  0 Aug 11 15:12 redis.sock
drwxr-xr-x 2 remaproot  remaproot  60 Aug 11 15:12 sonic-db

root@vlab-01:/# ls -l /var/run/ | grep redis
drwxr-xr-x 3 redis redis  100 Aug  4 19:23 redis

root@vlab-01:/# ls -l /var/run/redis/
total 4
-rw-r--r-- 1 redis redis  3 Aug  4 19:23 redis.pid
srwxrw---- 1 redis redis  0 Aug  4 19:23 redis.sock
drwxr-xr-x 2 root  root  60 Aug  4 19:23 sonic-db

Which release branch to backport (provide reason below if selected)

Tested branch (Please provide the tested image version)

SONiC.master.0-b060551b7

Description for the changelog

Link to config_db schema for YANG module changes

A picture of a cute animal (not mandatory but encouraged)

Signed-off-by: Mai Bui <[email protected]>

lguohan · 2023-07-27T16:06:03Z

is there a design doc?

Signed-off-by: Mai Bui <[email protected]>

dockers/docker-database/Dockerfile.j2

Signed-off-by: Mai Bui <[email protected]>

build_debian.sh

Signed-off-by: Mai Bui <[email protected]>

dockers/docker-database/Dockerfile.j2

qiluo-msft · 2023-08-03T07:36:03Z

files/build_templates/docker_image_ctl.j2

    fi
+    chgrp -f -R redis "$(dirname "$REDIS_SOCK")" && \
+    chmod -f -R 0775 "$(dirname "$REDIS_SOCK")"


0775

Should it be 760? #Closed

/var/run/redis/ needs 775 for sufficient permission to get Redis start if /var/run/redis/ is owned by group redis. /var/run/redis/sonic-db/ need 755 if owned by root group or 775 if /var/run/redis/sonic-db/ is owned by redis group to pass kvm testcase iface_namingmode/test_iface_namingmode.py

because iface_namingmode/test_iface_namingmode.py creates a guest user and guest user is not added to redis group. 770 or 760 will not work because guest user cannot access sonic database configuration json file.
https://github.com/sonic-net/sonic-mgmt/blob/master/tests/iface_namingmode/test_iface_namingmode.py#L124-L126

Or maybe the dir user/group ownership need to be changed.

maipbui · 2023-08-03T16:13:09Z

is there a design doc?

@lguohan I will draft a design doc.

Signed-off-by: Mai Bui <[email protected]>

build_debian.sh

files/build_templates/docker_image_ctl.j2

Signed-off-by: Mai Bui <[email protected]>

build_debian.sh

dockers/docker-database/Dockerfile.j2

Signed-off-by: Mai Bui <[email protected]>

maipbui · 2023-08-16T13:46:52Z

/azp run Azure.sonic-buildimage

azure-pipelines · 2023-08-16T13:46:57Z

Commenter does not have sufficient privileges for PR 15972 in repo sonic-net/sonic-buildimage

maipbui · 2023-08-16T13:47:11Z

/azpw run Azure.sonic-buildimage

mssonicbld · 2023-08-16T13:47:13Z

/AzurePipelines run Azure.sonic-buildimage

azure-pipelines · 2023-08-16T13:47:25Z

Azure Pipelines successfully started running 1 pipeline(s).

Yarden-Z · 2023-08-17T06:39:17Z

build_debian.sh

@@ -43,6 +43,9 @@ HOSTNAME=sonic
 DEFAULT_USERINFO="Default admin user,,,"
 BUILD_TOOL_PATH=src/sonic-build-hooks/buildinfo
 TRUSTED_GPG_DIR=$BUILD_TOOL_PATH/trusted.gpg.d
+## Remapped docker usernames and group names
+REMAPREDIS=remapredis


Question - should we use a meaningful name here? remapredis doesn't sound like something that is describing this item.
Maybe use unpriv-redis? Do depict what we intend this user to be.

Yes, we can mutually agree on better variable name here

Yarden-Z · 2023-08-17T06:57:34Z

build_debian.sh

+sudo LANG=C chroot $FILESYSTEM_ROOT usermod -aG $REMAPREDIS $USERNAME
+## Create remapped docker root user and group
+sudo LANG=C chroot $FILESYSTEM_ROOT groupadd -f -g $START_UID $REMAPROOT
+sudo LANG=C chroot $FILESYSTEM_ROOT useradd -u $START_GID -g $REMAPROOT $REMAPROOT -c "remapped docker root user" -m -s /bin/bash


Is this the docker root user or the system root user?

It's docker root user inside container, but it's remapped to lower privileged user on host.

Yarden-Z · 2023-08-17T06:59:06Z

files/docker/daemon.json

@@ -0,0 +1,3 @@
+{
+    "userns-remap": "admin"


Is this the name of our NS?

No, admin is not the name of a namespace, but rather the username for the user namespace remapping in Docker

make redis process runs as non-root user

23b241b

Signed-off-by: Mai Bui <[email protected]>

maipbui requested a review from qiluo-msft July 26, 2023 20:41

maipbui added 2 commits July 27, 2023 21:07

change grp redis /var/run/redis

600e8fd

Signed-off-by: Mai Bui <[email protected]>

remove vars

9c3b22b

Signed-off-by: Mai Bui <[email protected]>

qiluo-msft reviewed Aug 1, 2023

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dockers/docker-database/Dockerfile.j2 Outdated Show resolved Hide resolved

maipbui added 3 commits August 2, 2023 06:26

change file permissions to fix kvmtest

e8bca1e

Signed-off-by: Mai Bui <[email protected]>

remove file permission after container starts

abaea85

Signed-off-by: Mai Bui <[email protected]>

remove chmod

28964c0

Signed-off-by: Mai Bui <[email protected]>

qiluo-msft reviewed Aug 2, 2023

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build_debian.sh Outdated Show resolved Hide resolved

chmod 770 to 760

5d62b3d

Signed-off-by: Mai Bui <[email protected]>

qiluo-msft reviewed Aug 3, 2023

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dockers/docker-database/Dockerfile.j2 Outdated Show resolved Hide resolved

qiluo-msft reviewed Aug 3, 2023

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maipbui added 4 commits August 3, 2023 17:00

change redis permission for preStartAction and postStartAction

1bbac96

Signed-off-by: Mai Bui <[email protected]>

make /var/run/redis/ owned by redis:redis

ff23035

Signed-off-by: Mai Bui <[email protected]>

address pr comments

b7edd4f

Signed-off-by: Mai Bui <[email protected]>

fix repeated var

d2f24f2

Signed-off-by: Mai Bui <[email protected]>

qiluo-msft previously approved these changes Aug 5, 2023

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qiluo-msft requested a review from Yarden-Z August 5, 2023 00:20

qiluo-msft reviewed Aug 5, 2023

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Yarden-Z reviewed Aug 6, 2023

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Yarden-Z reviewed Aug 6, 2023

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files/build_templates/docker_image_ctl.j2 Show resolved Hide resolved

maipbui added 2 commits August 11, 2023 15:43

non-root redis and userns-remap for db

642c287

Signed-off-by: Mai Bui <[email protected]>

Merge remote-tracking branch 'upstream/master' into nonroot_redis

72464cd

maipbui dismissed qiluo-msft’s stale review via 72464cd August 11, 2023 15:48

maipbui changed the title ~~make redis process runs as non-root user~~ [database] enable userns-remap and make redis process runs as non-root user Aug 11, 2023

qiluo-msft reviewed Aug 11, 2023

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qiluo-msft reviewed Aug 11, 2023

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qiluo-msft reviewed Aug 11, 2023

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maipbui added 3 commits August 14, 2023 16:15

fix PR comments

c2985af

Signed-off-by: Mai Bui <[email protected]>

host network to bridge network for db

04bc7a8

Signed-off-by: Mai Bui <[email protected]>

simplify code

1db0021

Signed-off-by: Mai Bui <[email protected]>

maipbui mentioned this pull request Aug 16, 2023

SONiC namespace remap HLD sonic-net/SONiC#1444

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Yarden-Z reviewed Aug 17, 2023

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maipbui closed this Sep 5, 2023

maipbui deleted the nonroot_redis branch September 5, 2023 15:19

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[database] enable userns-remap and make redis process runs as non-root user #15972

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[database] enable userns-remap and make redis process runs as non-root user #15972

[database] enable userns-remap and make redis process runs as non-root user #15972

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maipbui commented Jul 26, 2023 • edited Loading

Why I did it

Work item tracking

How I did it

How to verify it

Which release branch to backport (provide reason below if selected)

Tested branch (Please provide the tested image version)

Description for the changelog

Link to config_db schema for YANG module changes

A picture of a cute animal (not mandatory but encouraged)

lguohan commented Jul 27, 2023

qiluo-msft Aug 3, 2023 • edited Loading

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maipbui commented Jul 26, 2023 •

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