What's the correct way to share the mysql/mariadb data dir of the host system to a container and map the permissions correctly? I have been struggling with this for a couple of days. I'm sorry if this question has been asked before, but I have searched thoroughly and not been able to find the solution yet. Basically what I have done so far:
Install mariadb-server on both host and container and: $ printf "lxd:$(id -u mysql):1\nroot:$(id -u mysql):1\n" | sudo tee -a /etc/subuid $ printf "lxd:$(id -g mysql):1\nroot:$(id -g mysql):1\n" | sudo tee -a /etc/subgid $ sudo systemctl restart lxd $ printf "uid $(id -u mysql) 1000\ngid $(id -g mysql) 1000" | lxc config set $CONTAINER_NAME raw.idmap - $ lxc restart $CONTAINER_NAME $ sudo lxc config device add $CONTAINER_NAME mysql disk source=/var/lib/mysql path=/var/lib/mysql Unfortunately, this breaks the container and prevents it from starting since the mapping isn't allowed. $ sudo lxc info --show-log ub1804x64-3 Name: ub1804x64-3 Remote: unix:// Architecture: x86_64 Created: 2018/07/09 15:30 UTC Status: Stopped Type: persistent Profiles: default Log: lxc ub1804x64-3 20180709154554.682 ERROR lxc_conf - conf.c:lxc_map_ids:2919 - newuidmap failed to write mapping "newuidmap: uid range [1000-1001) -> [114-115) not allowed": newuidmap 6725 0 100000 1000 1000 114 1 1001 101001 64535 lxc ub1804x64-3 20180709154554.682 ERROR lxc_start - start.c:lxc_spawn:1661 - Failed to set up id mapping. lxc ub1804x64-3 20180709154554.755 WARN lxc_network - network.c:lxc_delete_network_priv:2607 - Failed to remove interface "veth38DOB9" from "lxdbr0": Invalid argument lxc ub1804x64-3 20180709154554.755 ERROR lxc_container - lxccontainer.c:wait_on_daemonized_start:834 - Received container state "ABORTING" instead of "RUNNING" lxc ub1804x64-3 20180709154554.756 ERROR lxc_start - start.c:__lxc_start:1887 - Failed to spawn container "ub1804x64-3" lxc 20180709154554.775 WARN lxc_commands - commands.c:lxc_cmd_rsp_recv:130 - Connection reset by peer - Failed to receive response for command "get_state" I'm basically following this article ( https://stgraber.org/2017/06/15/custom-user-mappings-in-lxd-containers/) written by Stéphane Graber (the super awesome primary LXD developer) to achieve this. I'll admit that I don't fully understand what's going on here, if someone could help me understand my mistake a bit better, I'd really appreciate it. I have a feeling I have the range wrong (1000?). I previously attempted doing the same by manually adding the mysql user/group and trying to map those (instead of installing mysql), but that also didn't work out (Same error). This is what I tried before trying the mapping): $ sudo groupadd mysql $ sudo useradd -r -g mysql mysql I also tried with: $ printf "both $(id -u mysql) $(id -u mysql)" | lxc config set $CONTAINER_NAME raw.idmap - Then the error I get is: $ sudo lxc info --show-log tmp3 Name: tmp3 Remote: unix:// Architecture: x86_64 Created: 2018/07/09 20:32 UTC Status: Stopped Type: persistent Profiles: default Log: lxc tmp3 20180709204423.805 ERROR lxc_conf - conf.c:lxc_map_ids:2919 - newgidmap failed to write mapping "newgidmap: gid range [114-115) -> [114-115) not allowed": newgidmap 30081 114 114 1 0 100000 114 115 100115 65421 lxc tmp3 20180709204423.805 ERROR lxc_start - start.c:lxc_spawn:1661 - Failed to set up id mapping. lxc tmp3 20180709204423.876 WARN lxc_network - network.c:lxc_delete_network_priv:2607 - Failed to remove interface "vethYL869L" from "lxdbr0": Invalid argument lxc tmp3 20180709204423.876 ERROR lxc_container - lxccontainer.c:wait_on_daemonized_start:834 - Received container state "ABORTING" instead of "RUNNING" lxc tmp3 20180709204423.877 ERROR lxc_start - start.c:__lxc_start:1887 - Failed to spawn container "tmp3" lxc 20180709204423.897 WARN lxc_commands - commands.c:lxc_cmd_rsp_recv:130 - Connection reset by peer - Failed to receive response for command "get_state" I'm using LXD 3.0.1 running on host Ubuntu 18.04 amd64 and testing with a Ubuntu 18.04 amd64 container Thanks for your help in advance!!
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