allow netdata installer to install and run netdata as any user (#13780)

* allow netdata installer to install and run netdata as any user

* Update netdata-installer.sh

Co-authored-by: Austin S. Hemmelgarn <ahferroin7@gmail.com>

* Update netdata-installer.sh

Co-authored-by: Austin S. Hemmelgarn <ahferroin7@gmail.com>

Co-authored-by: Austin S. Hemmelgarn <ahferroin7@gmail.com>

4 files changed, 35 insertions, 32 deletions

diff --git a/build/subst.inc b/build/subst.inc
index f51f47074d..3c972114b8 100644
--- a/build/subst.inc
+++ b/build/subst.inc
@@ -13,6 +13,7 @@
 		-e 's#[@]libsysdir_POST@#$(libsysdir)#g' \
 		-e 's#[@]enable_aclk_POST@#$(enable_aclk)#g' \
 		-e 's#[@]enable_cloud_POST@#$(enable_cloud)#g' \
+		-e 's#[@]netdata_user_POST@#$(netdata_user)#g' \
 		$< > $@.tmp; then \
 		mv "$@.tmp" "$@"; \
 	else \
diff --git a/configure.ac b/configure.ac
index e2c73e28b2..327cbb6c7a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1540,6 +1540,7 @@ configdir="${sysconfdir}/netdata"
 libconfigdir="${libdir}/netdata/conf.d"
 logdir="${localstatedir}/log/netdata"
 pluginsdir="${libexecdir}/netdata/plugins.d"
+netdata_user="${with_user}"
 libsysdir="${libdir}/netdata/system"
 
 AC_SUBST([varlibdir])
@@ -1552,6 +1553,7 @@ AC_SUBST([libconfigdir])
 AC_SUBST([logdir])
 AC_SUBST([pluginsdir])
 AC_SUBST([webdir])
+AC_SUBST([netdata_user])
 AC_SUBST([libsysdir])
 
 CFLAGS="${originalCFLAGS} ${OPTIONAL_LTO_CFLAGS} ${OPTIONAL_PROTOBUF_CFLAGS} ${OPTIONAL_MATH_CFLAGS} ${OPTIONAL_NFACCT_CFLAGS} \
diff --git a/netdata-installer.sh b/netdata-installer.sh
index e2e7c647ce..a466447238 100755
--- a/netdata-installer.sh
+++ b/netdata-installer.sh
@@ -934,6 +934,34 @@ if [ "$have_autotools" ]; then
   fi
 fi
 
+# function to extract values from the config file
+config_option() {
+  section="${1}"
+  key="${2}"
+  value="${3}"
+
+  if [ -x "${NETDATA_PREFIX}/usr/sbin/netdata" ] && [ -r "${NETDATA_PREFIX}/etc/netdata/netdata.conf" ]; then
+    "${NETDATA_PREFIX}/usr/sbin/netdata" \
+      -c "${NETDATA_PREFIX}/etc/netdata/netdata.conf" \
+      -W get "${section}" "${key}" "${value}" ||
+      echo "${value}"
+  else
+    echo "${value}"
+  fi
+}
+
+# the user netdata will run as
+if [ "$(id -u)" = "0" ]; then
+  NETDATA_USER="$(config_option "global" "run as user" "netdata")"
+  ROOT_USER="root"
+else
+  NETDATA_USER="${USER}"
+  ROOT_USER="${USER}"
+fi
+NETDATA_GROUP="$(id -g -n "${NETDATA_USER}")"
+[ -z "${NETDATA_GROUP}" ] && NETDATA_GROUP="${NETDATA_USER}"
+echo >&2 "Netdata user and group set to: ${NETDATA_USER}/${NETDATA_GROUP}"
+
 # shellcheck disable=SC2086
 if ! run ./configure \
          --prefix="${NETDATA_PREFIX}/usr" \
@@ -943,7 +971,7 @@ if ! run ./configure \
          --libdir="${NETDATA_PREFIX}/usr/lib" \
          --with-zlib \
          --with-math \
-         --with-user=netdata \
+         --with-user="${NETDATA_USER}" \
          ${NETDATA_CONFIGURE_OPTIONS} \
          CFLAGS="${CFLAGS}" LDFLAGS="${LDFLAGS}"; then
   fatal "Failed to configure Netdata sources." I000A
@@ -1077,34 +1105,6 @@ progress "Read installation options from netdata.conf"
 [ ! -f "${NETDATA_PREFIX}/etc/netdata/netdata.conf" ] &&
   touch "${NETDATA_PREFIX}/etc/netdata/netdata.conf"
 
-# function to extract values from the config file
-config_option() {
-  section="${1}"
-  key="${2}"
-  value="${3}"
-
-  if [ -s "${NETDATA_PREFIX}/etc/netdata/netdata.conf" ]; then
-    "${NETDATA_PREFIX}/usr/sbin/netdata" \
-      -c "${NETDATA_PREFIX}/etc/netdata/netdata.conf" \
-      -W get "${section}" "${key}" "${value}" ||
-      echo "${value}"
-  else
-    echo "${value}"
-  fi
-}
-
-# the user netdata will run as
-if [ "$(id -u)" = "0" ]; then
-  NETDATA_USER="$(config_option "global" "run as user" "netdata")"
-  ROOT_USER="root"
-else
-  NETDATA_USER="${USER}"
-  ROOT_USER="${USER}"
-fi
-NETDATA_GROUP="$(id -g -n "${NETDATA_USER}")"
-[ -z "${NETDATA_GROUP}" ] && NETDATA_GROUP="${NETDATA_USER}"
-echo >&2 "Netdata user and group is finally set to: ${NETDATA_USER}/${NETDATA_GROUP}"
-
 # port
 defport=19999
 NETDATA_PORT="$(config_option "web" "default port" ${defport})"
diff --git a/system/netdata.service.in b/system/netdata.service.in
index 37ce784bc9..3947392f44 100644
--- a/system/netdata.service.in
+++ b/system/netdata.service.in
@@ -7,16 +7,16 @@ After=network.target httpd.service squid.service nfs-server.service mysqld.servi
 
 [Service]
 Type=simple
-User=netdata
+User=@netdata_user_POST@
 Group=netdata
 RuntimeDirectory=netdata
 RuntimeDirectoryMode=0775
 PIDFile=/run/netdata/netdata.pid
 ExecStart=@sbindir_POST@/netdata -P /run/netdata/netdata.pid -D
 ExecStartPre=/bin/mkdir -p @localstatedir_POST@/cache/netdata
-ExecStartPre=/bin/chown -R netdata:netdata @localstatedir_POST@/cache/netdata
+ExecStartPre=/bin/chown -R @netdata_user_POST@ @localstatedir_POST@/cache/netdata
 ExecStartPre=/bin/mkdir -p /run/netdata
-ExecStartPre=/bin/chown -R netdata:netdata /run/netdata
+ExecStartPre=/bin/chown -R @netdata_user_POST@ /run/netdata
 PermissionsStartOnly=true
 
 # saving a big db on slow disks may need some time