diff --git a/build.assets/Dockerfile-centos6 b/build.assets/Dockerfile-centos6
deleted file mode 100644
index ec15b1ef5d3..00000000000
--- a/build.assets/Dockerfile-centos6
+++ /dev/null
@@ -1,50 +0,0 @@
-# This Dockerfile makes the "build box": the container used to build official
-# releases of Teleport and its documentation.
-FROM centos:6
-
-ENV LANGUAGE=en_US.UTF-8 \
-    LANG=en_US.UTF-8 \
-    LC_ALL=en_US.UTF-8 \
-    LC_CTYPE=en_US.UTF-8
-
-# Replace regular CentOS 6 mirror list with vault.centos.org, as CentOS 6 is EOL
-# and regular mirrors aren't hosted any more.
-RUN sed -i 's%^mirrorlist%#mirrorlist%g' /etc/yum.repos.d/* && \
-    sed -i 's%#baseurl=http://mirror.centos.org%baseurl=http://vault.centos.org%g' /etc/yum.repos.d/* && \
-    yum makecache fast && \
-    yum -y install gcc pam-devel glibc-devel net-tools tree git zip && \
-    yum clean all
-
-# Create /opt directory from pre-built assets of gcc and binutils. Both are
-# needed to build programs that use CGO starting with Go 1.17. See
-# Dockerfile-centos6-assets for more details.
-RUN cd / && curl -L https://s3.amazonaws.com/clientbuilds.gravitational.io/go/centos6-assets.tar.gz | tar -xz
-
-ARG UID
-ARG GID
-RUN (groupadd ci --gid=$GID -o && useradd ci --uid=$UID --gid=$GID --create-home --shell=/bin/sh && \
-     mkdir -p -m0700 /var/lib/teleport && chown -R ci /var/lib/teleport)
-
-# Install etcd.
-RUN (curl -L https://github.com/coreos/etcd/releases/download/v3.3.9/etcd-v3.3.9-linux-amd64.tar.gz | tar -xz && \
-     cp etcd-v3.3.9-linux-amd64/etcd* /bin/)
-
-# Install Go.
-ARG RUNTIME
-RUN mkdir -p /opt && cd /opt && curl https://storage.googleapis.com/golang/$RUNTIME.linux-amd64.tar.gz | tar xz && \
-    mkdir -p /go/src/github.com/gravitational/teleport && \
-    chmod a+w /go && \
-    chmod a+w /var/lib && \
-    chmod a-w / && \
-    /opt/go/bin/go version
-
-ENV GOPATH="/go" \
-    GOROOT="/opt/go" \
-    PATH="/opt/bin:$PATH:/opt/go/bin:/go/bin:/go/src/github.com/gravitational/teleport/build"
-
-# Install PAM module and policies for testing.
-COPY pam/ /opt/pam_teleport/
-RUN make -C /opt/pam_teleport install
-
-VOLUME ["/go/src/github.com/gravitational/teleport"]
-EXPOSE 6600 2379 2380
diff --git a/build.assets/Dockerfile-centos6-assets b/build.assets/Dockerfile-centos6-assets
deleted file mode 100644
index 4dd9a5c4ebf..00000000000
--- a/build.assets/Dockerfile-centos6-assets
+++ /dev/null
@@ -1,52 +0,0 @@
-# This Dockerfile creates build assets needed for CentOS 6 builds.
-#
-# Go 1.17 does not build programs that use CGO (like Teleport) with the
-# version of gcc (4.4.7) and ld (2.20) that CentOS 6 ships with.
-#
-# When you attempt to compile Teleport, you will run into the below error.
-#
-#  cc1: error: unrecognized command line option "-fno-lto"
-#
-# Upgrading to gcc 4.8.5 will resolve that issue. However, Teleport still will
-# not compile, you will run into the below error.
-#
-#  unrecognized relocation (0x2a) in section .text
-#
-# Which requires you to upgrade to ld 2.26.
-#
-# Because gcc can take hours to compile, this script is used to build and
-# package the needed versions of gcc and binutils so speed up Teleport builds.
-FROM centos:6
-
-ENV LANGUAGE=en_US.UTF-8 \
-    LANG=en_US.UTF-8 \
-    LC_ALL=en_US.UTF-8 \
-    LC_CTYPE=en_US.UTF-8
-
-# Replace regular CentOS 6 mirror list with vault.centos.org, as CentOS 6 is EOL
-# and regular mirrors aren't hosted any more.
-RUN sed -i 's%^mirrorlist%#mirrorlist%g' /etc/yum.repos.d/* && \
-    sed -i 's%#baseurl=http://mirror.centos.org%baseurl=http://vault.centos.org%g' /etc/yum.repos.d/* && \
-    yum makecache fast && \
-    yum -y install gcc gcc-c++ glibc-devel glibc-devel.i686 net-tools tree git zip wget && \
-    yum clean all
-
-# Download, build, and install gcc.
-RUN mkdir -p /opt && cd /opt && curl -L https://ftp.gnu.org/gnu/gcc/gcc-4.8.5/gcc-4.8.5.tar.gz | tar -xz && \
-    cd gcc-4.8.5 && \
-    ./contrib/download_prerequisites && \
-    ./configure --prefix=/opt --enable-languages=c,c++ && \
-    make && \
-    make install && \
-    rm -fr ../gcc-4.8.5
-
-# Download, build, and install binuils.
-RUN mkdir -p /opt && cd /opt && curl -L https://ftp.gnu.org/gnu/binutils/binutils-2.26.tar.gz | tar -xz && \
-    cd binutils-2.26 && \
-    ./configure --prefix=/opt && \
-    make && \
-    make install && \
-    rm -fr ../binutils-2.26
-
-# Create the archive and copy it to the host.
-RUN tar -czvf centos6-assets.tar.gz /opt
diff --git a/build.assets/Dockerfile-centos6-fips b/build.assets/Dockerfile-centos6-fips
deleted file mode 100644
index 0c30cde257c..00000000000
--- a/build.assets/Dockerfile-centos6-fips
+++ /dev/null
@@ -1,53 +0,0 @@
-# This Dockerfile makes the "build box": the container used to build official
-# releases of Teleport and its documentation.
-FROM centos:6
-
-ENV LANGUAGE=en_US.UTF-8 \
-    LANG=en_US.UTF-8 \
-    LC_ALL=en_US.UTF-8 \
-    LC_CTYPE=en_US.UTF-8
-
-# Replace regular CentOS 6 mirror list with vault.centos.org, as CentOS 6 is EOL
-# and regular mirrors aren't hosted any more.
-RUN sed -i 's%^mirrorlist%#mirrorlist%g' /etc/yum.repos.d/* && \
-    sed -i 's%#baseurl=http://mirror.centos.org%baseurl=http://vault.centos.org%g' /etc/yum.repos.d/* && \
-    yum makecache fast && \
-    yum -y install gcc pam-devel glibc-devel net-tools tree git zip && \
-    yum clean all
-
-ARG UID
-ARG GID
-RUN (groupadd ci --gid=$GID -o && useradd ci --uid=$UID --gid=$GID --create-home --shell=/bin/sh && \
-     mkdir -p -m0700 /var/lib/teleport && chown -R ci /var/lib/teleport)
-
-# Install etcd.
-RUN (curl -L https://github.com/coreos/etcd/releases/download/v3.3.9/etcd-v3.3.9-linux-amd64.tar.gz | tar -xz && \
-     cp etcd-v3.3.9-linux-amd64/etcd* /bin/)
-
-# BoringCrypto (unlike regular Go) requires glibc 2.14, so we have to build from source.
-# 1) Install older binary Go runtime for bootstrapping
-# 2) Get source for the correct Go boringcrypto runtime and compile it with Go bootstrap runtime
-# 3) Erase Go bootstrap runtime and create build directories
-# 4) Print compiled Go version
-ARG BORINGCRYPTO_RUNTIME
-ARG GO_BOOTSTRAP_RUNTIME=go1.9.7
-RUN mkdir -p /go-bootstrap && cd /go-bootstrap && curl https://dl.google.com/go/${GO_BOOTSTRAP_RUNTIME}.linux-amd64.tar.gz | tar xz && \
-    mkdir -p /opt && cd /opt && curl https://go-boringcrypto.storage.googleapis.com/${BORINGCRYPTO_RUNTIME}.src.tar.gz | tar xz && \
-    cd /opt/go/src && GOROOT_BOOTSTRAP=/go-bootstrap/go ./make.bash && \
-    rm -rf /go-bootstrap && \
-    mkdir -p /go/src/github.com/gravitational/teleport && \
-    chmod a+w /go && \
-    chmod a+w /var/lib && \
-    chmod a-w / && \
-    /opt/go/bin/go version
-
-ENV GOPATH="/go" \
-    GOROOT="/opt/go" \
-    PATH="$PATH:/opt/go/bin:/go/bin:/go/src/github.com/gravitational/teleport/build"
-
-# Install PAM module and policies for testing.
-COPY pam/ /opt/pam_teleport/
-RUN make -C /opt/pam_teleport install
-
-VOLUME ["/go/src/github.com/gravitational/teleport"]
-EXPOSE 6600 2379 2380
diff --git a/build.assets/Makefile b/build.assets/Makefile
index cc9e8b7b6c1..8a68ca15c9f 100644
--- a/build.assets/Makefile
+++ b/build.assets/Makefile
@@ -36,7 +36,6 @@ GOGO_PROTO_TAG ?= v1.3.2
 
 BUILDBOX=quay.io/gravitational/teleport-buildbox:$(RUNTIME)
 BUILDBOX_FIPS=quay.io/gravitational/teleport-buildbox-fips:$(RUNTIME)
-BUILDBOX_CENTOS6=quay.io/gravitational/teleport-buildbox-centos6:$(RUNTIME)
 BUILDBOX_CENTOS7=quay.io/gravitational/teleport-buildbox-centos7:$(RUNTIME)
 BUILDBOX_CENTOS7_FIPS=quay.io/gravitational/teleport-buildbox-centos7-fips:$(RUNTIME)
 BUILDBOX_ARM=quay.io/gravitational/teleport-buildbox-arm:$(RUNTIME)
@@ -141,22 +140,6 @@ buildbox-fips:
 			--tag $(BUILDBOX_FIPS) -f Dockerfile-fips . ; \
 	fi
 
-#
-# Builds a Docker buildbox for CentOS 6 builds
-#
-.PHONY:buildbox-centos6
-buildbox-centos6:
-	@if [[ $${DRONE} == "true" ]] && ! docker inspect --type=image $(BUILDBOX_CENTOS6) 2>&1 >/dev/null; then docker pull $(BUILDBOX_CENTOS6) || true; fi;
-	docker build \
-		--build-arg UID=$(UID) \
-		--build-arg GID=$(GID) \
-		--build-arg RUNTIME=$(RUNTIME) \
-		--cache-from $(BUILDBOX_CENTOS6) \
-		--tag $(BUILDBOX_CENTOS6) -f Dockerfile-centos6 .
-
-# CentOS 6 FIPS builds were removed in Teleport 7.0
-# https://github.com/gravitational/teleport/issues/7207
-
 #
 # Builds a Docker buildbox for CentOS 7 builds
 #
@@ -323,10 +306,6 @@ release-arm: buildbox-arm
 release-arm64: buildbox-arm
 	$(MAKE) release ARCH=arm64 BUILDBOX_NAME=$(BUILDBOX_ARM)
 
-.PHONY: release-amd64-centos6
-release-amd64-centos6: buildbox-centos6
-	$(MAKE) release-centos6 ARCH=amd64
-
 .PHONY: release-amd64-centos7
 release-amd64-centos7: buildbox-centos7
 	$(MAKE) release-centos7 ARCH=amd64
@@ -346,15 +325,6 @@ release-fips: buildbox-fips
 	docker run $(DOCKERFLAGS) -i $(NOROOT) $(BUILDBOX_FIPS_NAME) \
 		/usr/bin/make -C e release -e ADDFLAGS="$(ADDFLAGS)" OS=$(OS) ARCH=$(ARCH) RUNTIME=$(RUNTIME) FIPS=yes VERSION=$(VERSION) GITTAG=v$(VERSION) REPRODUCIBLE=yes
 
-#
-# Create a Teleport package for CentOS 6 using the build container.
-# DELETE IN 9.0 (zmb3)
-#
-.PHONY:release-centos6
-release-centos6: buildbox-centos6
-	docker run $(DOCKERFLAGS) -i $(NOROOT) $(BUILDBOX_CENTOS6) \
-		/usr/bin/make release -e ADDFLAGS="$(ADDFLAGS)" OS=$(OS) ARCH=$(ARCH) RUNTIME=$(RUNTIME) REPRODUCIBLE=no
-
 #
 # Create a Teleport package for CentOS 7 using the build container.
 #
@@ -400,14 +370,6 @@ test-docs: docsbox
 	docker run --platform=linux/amd64 -i $(NOROOT) -v $$(pwd)/..:/src/content $(DOCSBOX) \
 		/bin/sh -c "yarn markdown-lint-external-links"
 
-#
-# Builds assets needed by CentOS 6 in a container.
-#
-.PHONY:build-centos6-assets
-build-centos6-assets:
-	docker build -t buildbox-centos6-assets -f Dockerfile-centos6-assets .
-	docker run -v $$(pwd):/centos6.assets -it buildbox-centos6-assets cp /centos6-assets.tar.gz /centos6.assets
-
 #
 # Print the Go version used to build Teleport.
 #