Switch from fluentd to fluentbit for log forwarding (#1086)

This removes fluentd in favor of using fluentbit, which is lighter (in
memory usage) and seems to be more actively maintained.

Fluentbit's config file format is different from fluentd's.  It also
doesn't support the same record modification stuff that fluentd
supports, so we have to change the influxdb query slightly.  This
means that after an upgrade, the new CLI may won't work for querying older 
logs.  Hopefully, this slight breakage is acceptable; if users 
really need older logs they can use the older CLI.

hack/release-build.sh

@@ -96,23 +96,6 @@ build_builder_image() {
     popd
 }
 
-build_logger_image() {
-    local version=$1
-    local tag=fission/fluentd:$version
-
-    pushd $DIR/logger/fluentd
-
-    docker build -t $tag .
-    docker tag $tag fission/fluentd:latest
-
-    popd
-}
-
-push_logger_image() {
-    local version=$1
-    local tag=fission/fluentd:$version
-}
-
 build_env_image() {
     local version=$1
     envdir=$2
@@ -294,7 +277,6 @@ build_all() {
     build_fission_bundle_image $version $date $gitcommit
     build_fetcher_image $version $date $gitcommit
     build_builder_image $version $date $gitcommit
-    build_logger_image $version
     build_all_cli $version $date $gitcommit
     build_pre_upgrade_checks_image $version $date $gitcommit
 }

hack/release.sh

@@ -46,12 +46,6 @@ push_builder_image() {
     docker push $tag
 }
 
-push_logger_image() {
-    local version=$1
-    local tag=fission/fluentd:$version
-    docker push $tag
-}
-
 push_env_image() {
     local version=$1
     envdir=$2
@@ -141,9 +135,6 @@ push_all() {
     push_builder_image $version
     push_builder_image latest
 
-    push_logger_image $version
-    push_logger_image latest
-
     push_pre_upgrade_checks_image $version
     push_pre_upgrade_checks_image latest
 }

hack/runtests.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-
+set -euxo pipefail
 
 if [ ! -f ${KUBECONFIG} ]
 then