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fix: agent 改用固定系统用户，修复部分 LXC 容器启动失败 #8

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Merged
stqfdyr merged 2 commits into from
Sep 16, 2026
Merged

fix: agent 改用固定系统用户，修复部分 LXC 容器启动失败 #8

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7c629a0
fix: agent 改用固定系统用户，修复部分 LXC 容器启动失败
stqfdyr Sep 15, 2026
34a5fc1
fix: 单元补回 RestrictSUIDSGID=，建用户提前到下载与注册之前
stqfdyr Sep 16, 2026
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18 changes: 17 additions & 1 deletion install.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -112,6 +112,16 @@ else
exit 1
fi

# The service user the unit below runs as, created before the download and the
# registration, so a host where this fails keeps the agent it already runs and
# spends no registration key. OpenRC has no equivalent and Alpine ships no
# useradd, which is why this is confined to systemd.
if [ "$INIT" = systemd ]; then
id -u monitor-agent >/dev/null 2>&1 ||
useradd --system --no-create-home --shell /usr/sbin/nologin monitor-agent ||
{ echo "cannot create the system user monitor-agent" >&2; exit 1; }
fi

case "$(uname -m)" in
x86_64 | amd64) ARCH=x86_64 ;;
aarch64 | arm64) ARCH=aarch64 ;;
Expand Down Expand Up @@ -236,8 +246,14 @@ EnvironmentFile=$ENV_FILE
ExecStart=$BIN --interval $INTERVAL${INSECURE:+ --insecure}
Restart=always
RestartSec=5
DynamicUser=yes
# A fixed user rather than DynamicUser=: when the mount namespace cannot be
# created, as in an LXC container without nesting, systemd skips ProtectSystem=
# and the other mount sandboxing for a unit with a static User=, but refuses to
# start one with DynamicUser= and exits 226/NAMESPACE. DynamicUser= also implied
# RestrictSUIDSGID=, which is therefore stated below.
User=monitor-agent
NoNewPrivileges=yes
RestrictSUIDSGID=yes
ProtectSystem=strict
ProtectHome=yes
PrivateTmp=yes
Expand Down