config: Add db.trace snap config to set LIBDQLITE_TRACE

Signed-off-by: Wesley Hershberger <[email protected]>

snapcraft.yaml

@@ -42,6 +42,7 @@ description: |-
    - daemon.preseed: Pass a YAML configuration to `lxd init` on initial start
    - daemon.syslog: Send LXD log events to syslog [default=false]
    - daemon.verbose: Increase logging to verbose level [default=false]
+   - db.trace: Enable dqlite trace logging (very verbose) [default=false]
    - lvm.external: Use the system's LVM tools [default=false]
    - lxcfs.pidfd: Start per-container process tracking [default=false]
    - lxcfs.loadavg: Start tracking per-container load average [default=false]

snapcraft/commands/daemon.start

@@ -726,6 +726,10 @@ if [ "${daemon_verbose:-"false"}" = "true" ]; then
     CMD="${CMD} --verbose"
 fi
 
+if [ "${db_trace:-"false"}" = "true" ]; then
+    export LIBDQLITE_TRACE=1
+fi
+
 # Check if this is the first time LXD is started.
 FIRSTRUN="false"
 if [ ! -d "${SNAP_COMMON}/lxd/database" ]; then

snapcraft/hooks/configure

@@ -48,6 +48,7 @@ daemon_group=$(snapctl get daemon.group)
 daemon_user_group=$(snapctl get daemon.user.group)
 daemon_syslog=$(get_bool "$(snapctl get daemon.syslog)")
 daemon_verbose=$(get_bool "$(snapctl get daemon.verbose)")
+db_trace=$(get_bool "$(snapctl get db.trace)")
 lvm_external=$(get_bool "$(snapctl get lvm.external)")
 lxcfs_loadavg=$(get_bool "$(snapctl get lxcfs.loadavg)")
 lxcfs_pidfd=$(get_bool "$(snapctl get lxcfs.pidfd)")
@@ -80,6 +81,7 @@ daemon_group=${daemon_group:-"lxd"}
 daemon_syslog=${daemon_syslog:-"false"}
 daemon_user_group=${daemon_user_group:-"lxd"}
 daemon_verbose=${daemon_verbose:-"false"}
+db_trace=${db_trace:-"false"}
 lvm_external=${lvm_external:-"false"}
 lxcfs_cfs=${lxcfs_cfs:-"false"}
 lxcfs_debug=${lxcfs_debug:-"false"}