preserve config in V3 -> V3 upgrade in OracleLinux

.github/workflows/ci.yml

@@ -306,6 +306,8 @@ jobs:
             version: "9"
           - image: "alpine"
             version: "3.22"
+          - image: "oraclelinux"
+            version: "8"
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Get Secrets from Azure Key Vault

Makefile

@@ -91,6 +91,8 @@ endif
 SELECTED_PACKAGE = $(DEB_PACKAGE)
 ifeq ($(OS_RELEASE),redhatenterprise)
 	SELECTED_PACKAGE = $(RPM_PACKAGE)
+else ifeq ($(OS_RELEASE),oraclelinux)
+	SELECTED_PACKAGE = $(RPM_PACKAGE)
 else ifeq ($(OS_RELEASE),alpine)
 	SELECTED_PACKAGE = $(APK_PACKAGE)
 endif

go.mod

@@ -270,7 +270,6 @@ require (
 	github.com/splunk/stef/go/otel v0.0.8 // indirect
 	github.com/splunk/stef/go/pdata v0.0.8 // indirect
 	github.com/splunk/stef/go/pkg v0.0.8 // indirect
-	github.com/stoewer/go-strcase v1.3.1 // indirect
 	github.com/stretchr/objx v0.5.3 // indirect
 	github.com/subosito/gotenv v1.6.0 // indirect
 	github.com/tilinna/clock v1.1.0 // indirect

go.sum

@@ -1,7 +1,5 @@
 buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.11-20260209202127-80ab13bee0bf.1 h1:PMmTMyvHScV9Mn8wc6ASge9uRcHy0jtqPd+fM35LmsQ=
 buf.build/gen/go/bufbuild/protovalidate/protocolbuffers/go v1.36.11-20260209202127-80ab13bee0bf.1/go.mod h1:tvtbpgaVXZX4g6Pn+AnzFycuRK3MOz5HJfEGeEllXYM=
-buf.build/go/protovalidate v1.0.0 h1:IAG1etULddAy93fiBsFVhpj7es5zL53AfB/79CVGtyY=
-buf.build/go/protovalidate v1.0.0/go.mod h1:KQmEUrcQuC99hAw+juzOEAmILScQiKBP1Oc36vvCLW8=
 buf.build/go/protovalidate v1.1.3 h1:m2GVEgQWd7rk+vIoAZ+f0ygGjvQTuqPQapBBdcpWVPE=
 buf.build/go/protovalidate v1.1.3/go.mod h1:9XIuohWz+kj+9JVn3WQneHA5LZP50mjvneZMnbLkiIE=
 cel.dev/expr v0.25.1 h1:1KrZg61W6TWSxuNZ37Xy49ps13NUovb66QLprthtwi4=
@@ -122,12 +120,8 @@ github.com/brianvoe/gofakeit/v6 v6.28.0 h1:Xib46XXuQfmlLS2EXRuJpqcw8St6qSZz75OUo
 github.com/brianvoe/gofakeit/v6 v6.28.0/go.mod h1:Xj58BMSnFqcn/fAQeSK+/PLtC5kSb7FJIq4JyGa8vEs=
 github.com/bytedance/gopkg v0.1.3 h1:TPBSwH8RsouGCBcMBktLt1AymVo2TVsBVCY4b6TnZ/M=
 github.com/bytedance/gopkg v0.1.3/go.mod h1:576VvJ+eJgyCzdjS+c4+77QF3p7ubbtiKARP3TxducM=
-github.com/bytedance/sonic v1.14.0 h1:/OfKt8HFw0kh2rj8N0F6C/qPGRESq0BbaNZgcNXXzQQ=
-github.com/bytedance/sonic v1.14.0/go.mod h1:WoEbx8WTcFJfzCe0hbmyTGrfjt8PzNEBdxlNUO24NhA=
 github.com/bytedance/sonic v1.15.0 h1:/PXeWFaR5ElNcVE84U0dOHjiMHQOwNIx3K4ymzh/uSE=
 github.com/bytedance/sonic v1.15.0/go.mod h1:tFkWrPz0/CUCLEF4ri4UkHekCIcdnkqXw9VduqpJh0k=
-github.com/bytedance/sonic/loader v0.3.0 h1:dskwH8edlzNMctoruo8FPTJDF3vLtDT0sXZwvZJyqeA=
-github.com/bytedance/sonic/loader v0.3.0/go.mod h1:N8A3vUdtUebEY2/VQC0MyhYeKUFosQU6FxH2JmUe6VI=
 github.com/bytedance/sonic/loader v0.5.0 h1:gXH3KVnatgY7loH5/TkeVyXPfESoqSBSBEiDd5VjlgE=
 github.com/bytedance/sonic/loader v0.5.0/go.mod h1:AR4NYCk5DdzZizZ5djGqQ92eEhCCcdf5x77udYiSJRo=
 github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8=
@@ -227,8 +221,6 @@ github.com/gabriel-vasile/mimetype v1.4.13 h1:46nXokslUBsAJE/wMsp5gtO500a4F3Nkz9
 github.com/gabriel-vasile/mimetype v1.4.13/go.mod h1:d+9Oxyo1wTzWdyVUPMmXFvp4F9tea18J8ufA774AB3s=
 github.com/gin-contrib/sse v1.1.0 h1:n0w2GMuUpWDVp7qSpvze6fAu9iRxJY4Hmj6AmBOU05w=
 github.com/gin-contrib/sse v1.1.0/go.mod h1:hxRZ5gVpWMT7Z0B0gSNYqqsSCNIJMjzvm6fqCz9vjwM=
-github.com/gin-gonic/gin v1.10.1 h1:T0ujvqyCSqRopADpgPgiTT63DUQVSfojyME59Ei63pQ=
-github.com/gin-gonic/gin v1.10.1/go.mod h1:4PMNQiOhvDRa013RKVbsiNwoyezlm2rm0uX/T7kzp5Y=
 github.com/gin-gonic/gin v1.12.0 h1:b3YAbrZtnf8N//yjKeU2+MQsh2mY5htkZidOM7O0wG8=
 github.com/gin-gonic/gin v1.12.0/go.mod h1:VxccKfsSllpKshkBWgVgRniFFAzFb9csfngsqANjnLc=
 github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
@@ -270,8 +262,6 @@ github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/o
 github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY=
 github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY=
 github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
-github.com/go-playground/validator/v10 v10.27.0 h1:w8+XrWVMhGkxOaaowyKH35gFydVHOvC0/uWoy2Fzwn4=
-github.com/go-playground/validator/v10 v10.27.0/go.mod h1:I5QpIEbmr8On7W0TktmJAumgzX4CA1XNl4ZmDuVHKKo=
 github.com/go-playground/validator/v10 v10.30.1 h1:f3zDSN/zOma+w6+1Wswgd9fLkdwy06ntQJp0BBvFG0w=
 github.com/go-playground/validator/v10 v10.30.1/go.mod h1:oSuBIQzuJxL//3MelwSLD5hc2Tu889bF0Idm9Dg26cM=
 github.com/go-resty/resty/v2 v2.16.5 h1:hBKqmWrr7uRc3euHVqmh1HTHcKn99Smr7o5spptdhTM=
@@ -285,8 +275,6 @@ github.com/gobwas/glob v0.2.3 h1:A4xDbljILXROh+kObIiy5kIaPYD8e96x1tgBhUI5J+Y=
 github.com/gobwas/glob v0.2.3/go.mod h1:d3Ez4x06l9bZtSvzIay5+Yzi0fmZzPgnTbPcKjJAkT8=
 github.com/goccy/go-json v0.10.5 h1:Fq85nIqj+gXn/S5ahsiTlK3TmC85qgirsdTP/+DeaC4=
 github.com/goccy/go-json v0.10.5/go.mod h1:oq7eo15ShAhp70Anwd5lgX2pLfOS3QCiwU/PULtXL6M=
-github.com/goccy/go-yaml v1.18.0 h1:8W7wMFS12Pcas7KU+VVkaiCng+kG8QiFeFwzFb+rwuw=
-github.com/goccy/go-yaml v1.18.0/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA=
 github.com/goccy/go-yaml v1.19.2 h1:PmFC1S6h8ljIz6gMRBopkjP1TVT7xuwrButHID66PoM=
 github.com/goccy/go-yaml v1.19.2/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA=
 github.com/gogo/googleapis v1.4.1 h1:1Yx4Myt7BxzvUr5ldGSbwYiZG6t9wGBZ+8/fX3Wvtq0=
@@ -308,8 +296,6 @@ github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek
 github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
 github.com/golang/snappy v1.0.0 h1:Oy607GVXHs7RtbggtPBnr2RmDArIsAefDwvrdWvRhGs=
 github.com/golang/snappy v1.0.0/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
-github.com/google/cel-go v0.26.1 h1:iPbVVEdkhTX++hpe3lzSk7D3G3QSYqLGoHOcEio+UXQ=
-github.com/google/cel-go v0.26.1/go.mod h1:A9O8OU9rdvrK5MQyrqfIxo1a0u4g3sF8KB6PUIaryMM=
 github.com/google/cel-go v0.27.0 h1:e7ih85+4qVrBuqQWTW4FKSqZYokVuc3HnhH5keboFTo=
 github.com/google/cel-go v0.27.0/go.mod h1:tTJ11FWqnhw5KKpnWpvW9CJC3Y9GK4EIS0WXnBbebzw=
 github.com/google/flatbuffers v25.2.10+incompatible h1:F3vclr7C3HpB1k9mxCGRMXq6FdUalZ6H/pNX4FP1v0Q=
@@ -673,6 +659,8 @@ github.com/quic-go/quic-go v0.59.0 h1:OLJkp1Mlm/aS7dpKgTc6cnpynnD2Xg7C1pwL6vy/SA
 github.com/quic-go/quic-go v0.59.0/go.mod h1:upnsH4Ju1YkqpLXC305eW3yDZ4NfnNbmQRCMWS58IKU=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
+github.com/rodaine/protogofakeit v0.1.1 h1:ZKouljuRM3A+TArppfBqnH8tGZHOwM/pjvtXe9DaXH8=
+github.com/rodaine/protogofakeit v0.1.1/go.mod h1:pXn/AstBYMaSfc1/RqH3N82pBuxtWgejz1AlYpY1mI0=
 github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
 github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc=
 github.com/rs/cors v1.11.1 h1:eU3gRzXLRK57F5rKMGMZURNdIG4EoAmX8k94r9wXWHA=
@@ -715,8 +703,6 @@ github.com/splunk/stef/go/pkg v0.0.8 h1:SdcKCxODAApYU4sp/qduN934qHhIg4kE2Sc3sy22
 github.com/splunk/stef/go/pkg v0.0.8/go.mod h1:eDMc/KOCPUv5ClCiF6Jcw8sDueYouDujMKhQoDbDtPw=
 github.com/stackitcloud/stackit-sdk-go/core v0.17.3 h1:GsZGmRRc/3GJLmCUnsZswirr5wfLRrwavbnL/renOqg=
 github.com/stackitcloud/stackit-sdk-go/core v0.17.3/go.mod h1:HBCXJGPgdRulplDzhrmwC+Dak9B/x0nzNtmOpu+1Ahg=
-github.com/stoewer/go-strcase v1.3.1 h1:iS0MdW+kVTxgMoE1LAZyMiYJFKlOzLooE4MxjirtkAs=
-github.com/stoewer/go-strcase v1.3.1/go.mod h1:fAH5hQ5pehh+j3nZfvwdk2RgEgQjAoM8wodgtPmh1xo=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
@@ -756,8 +742,6 @@ github.com/twmb/murmur3 v1.1.8 h1:8Yt9taO/WN3l08xErzjeschgZU2QSrwm1kclYq+0aRg=
 github.com/twmb/murmur3 v1.1.8/go.mod h1:Qq/R7NUyOfr65zD+6Q5IHKsJLwP7exErjN6lyyq3OSQ=
 github.com/ua-parser/uap-go v0.0.0-20240611065828-3a4781585db6 h1:SIKIoA4e/5Y9ZOl0DCe3eVMLPOQzJxgZpfdHHeauNTM=
 github.com/ua-parser/uap-go v0.0.0-20240611065828-3a4781585db6/go.mod h1:BUbeWZiieNxAuuADTBNb3/aeje6on3DhU3rpWsQSB1E=
-github.com/ugorji/go/codec v1.3.0 h1:Qd2W2sQawAfG8XSvzwhBeoGq71zXOC/Q1E9y/wUcsUA=
-github.com/ugorji/go/codec v1.3.0/go.mod h1:pRBVtBSKl77K30Bv8R2P+cLSGaTtex6fsA2Wjqmfxj4=
 github.com/ugorji/go/codec v1.3.1 h1:waO7eEiFDwidsBN6agj1vJQ4AG7lh2yqXyOXqhgQuyY=
 github.com/ugorji/go/codec v1.3.1/go.mod h1:pRBVtBSKl77K30Bv8R2P+cLSGaTtex6fsA2Wjqmfxj4=
 github.com/valyala/fastjson v1.6.4 h1:uAUNq9Z6ymTgGhcm0UynUAB6tlbakBrz6CQFax3BXVQ=
@@ -1029,8 +1013,6 @@ go.yaml.in/yaml/v2 v2.4.3 h1:6gvOSjQoTB3vt1l+CU+tSyi/HOjfOjRLJ4YwYZGwRO0=
 go.yaml.in/yaml/v2 v2.4.3/go.mod h1:zSxWcmIDjOzPXpjlTTbAsKokqkDNAVtZO0WOMiT90s8=
 go.yaml.in/yaml/v3 v3.0.4 h1:tfq32ie2Jv2UxXFdLJdh3jXuOzWiL1fo0bu/FbuKpbc=
 go.yaml.in/yaml/v3 v3.0.4/go.mod h1:DhzuOOF2ATzADvBadXxruRBLzYTpT36CKvDb3+aBEFg=
-golang.org/x/arch v0.20.0 h1:dx1zTU0MAE98U+TQ8BLl7XsJbgze2WnNKF/8tGp/Q6c=
-golang.org/x/arch v0.20.0/go.mod h1:bdwinDaKcfZUGpH09BB7ZmOfhalA8lQdzl62l8gGWsk=
 golang.org/x/arch v0.22.0 h1:c/Zle32i5ttqRXjdLyyHZESLD/bB90DCU1g9l/0YBDI=
 golang.org/x/arch v0.22.0/go.mod h1:dNHoOeKiyja7GTvF9NJS1l3Z2yntpQNzgrjh1cU103A=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=

scripts/packages/postinstall.sh

@@ -191,6 +191,42 @@ summary() {
     create_run_dir
     update_user_groups
     update_unit_file
+
+    # If the config file is missing after installation (e.g. removed by package cleanup during upgrade), 
+    # restore the pre-upgrade backup if one exists.
+    PREBACKUP="${AGENT_LIB_DIR}/nginx-agent.conf.preupgrade"
+
+    is_rhel_family() {
+        printf "%s\n" "$ID" "$ID_LIKE" | grep -Eq '\brhel\b|\bcentos\b|\bol\b|\balmalinux\b|\brocky\b|\bamzn\b' 2>/dev/null
+    }
+
+    is_rpm_based() {
+        printf "%s\n" "$ID" "$ID_LIKE" | grep -Eq '\brhel\b|\bcentos\b|\bol\b|\balmalinux\b|\brocky\b|\bamzn\b|\boraclelinux\b' 2>/dev/null
+    }
+
+    PREV_VER_FILE="${AGENT_LIB_DIR}/nginx-agent.preupgrade.version"
+    PREV_MAJOR=""
+    if [ -f "${PREV_VER_FILE}" ]; then
+        PREV_MAJOR=$(sed -n 's/^.*version v\([0-9]\+\).*$/\1/p' "${PREV_VER_FILE}" || true)
+    fi
+
+    # Restore config on RPM-based systems for V3→V3 upgrades
+    if is_rpm_based && [ "${PREV_MAJOR}" = "3" ] && [ -f "${PREBACKUP}" ]; then
+        printf "PostInstall: Restoring nginx-agent config from %s (prev major=%s) on RPM system\n" "${PREBACKUP}" "${PREV_MAJOR}"
+        mkdir -p "${AGENT_ETC_DIR}" || true
+        cp -a "${PREBACKUP}" "${AGENT_ETC_DIR}/nginx-agent.conf" || true
+        chown root:${AGENT_GROUP} "${AGENT_ETC_DIR}/nginx-agent.conf" || true
+        chmod 0640 "${AGENT_ETC_DIR}/nginx-agent.conf" || true
+    fi
+
+    # Restore manifest file
+    MANIFEST_BACKUP="${AGENT_LIB_DIR}/manifest.json.preupgrade"
+    if is_rpm_based && [ "${PREV_MAJOR}" = "3" ] && [ -f "${MANIFEST_BACKUP}" ]; then
+        printf "PostInstall: Restoring manifest from %s (prev major=%s) on RPM system\n" "${MANIFEST_BACKUP}" "${PREV_MAJOR}"
+        mkdir -p "${AGENT_LIB_DIR}" || true
+        cp -a "${MANIFEST_BACKUP}" "${AGENT_LIB_DIR}/manifest.json" || true
+    fi
+
     restart_agent_if_required
     summary
 }

scripts/packages/postremove.sh

@@ -32,6 +32,34 @@ full_cleanup() {
     rm -rf "/var/lib/nginx-agent"
 }
 
+is_agent_installed() {
+    # Check if nginx-agent binary still exists
+    if [ -f "/usr/bin/nginx-agent" ]; then
+        return 0  # Agent is installed
+    else
+        return 1  # Agent is not installed
+    fi
+}
+
+is_package_installed() {
+    # Check if nginx-agent package is still installed using package manager
+    case "$ID" in
+        debian|ubuntu)
+            dpkg -l | grep -q '^ii.*nginx-agent' && return 0 || return 1
+            ;;
+        rhel|fedora|centos|amzn|almalinux|rocky|ol)
+            rpm -q nginx-agent >/dev/null 2>&1 && return 0 || return 1
+            ;;
+        alpine)
+            apk info nginx-agent >/dev/null 2>&1 && return 0 || return 1
+            ;;
+        *)
+            return 1
+            ;;
+    esac
+}
+
+
 case "$ID" in
     debian|ubuntu)
         case "$1" in
@@ -49,12 +77,26 @@ case "$ID" in
                 ;;
         esac
         ;;
-    rhel|fedora|centos|amzn|almalinux|rocky)
+    rhel|fedora|centos|amzn|almalinux|rocky|ol)
         if [ "$1" = "0" ]; then
+            # Package is being completely removed
+            echo "PostRemove: Package being removed (not upgraded)"
             stop_agent_systemd
             disable_agent_systemd
             systemd_daemon_reload
-            full_cleanup
+
+            # Check if agent binary still exists (it shouldn't in a real removal)
+            if ! is_agent_installed; then
+                echo "PostRemove: Agent binary not found, performing full cleanup"
+                full_cleanup
+            else
+                echo "PostRemove: Agent binary still present, performing partial cleanup only"
+                cleanup
+            fi
+        elif [ "$1" = "1" ]; then
+            # Package is being upgraded
+            echo "PostRemove: Agent is being upgraded, performing partial cleanup only"
+            cleanup
         fi
         ;;
     alpine)

scripts/packages/preinstall.sh

@@ -149,5 +149,39 @@ command:
 {
     title
     ensure_sudo
+
+    # Preserve existing config before upgrade on RHEL-family systems and only for V3->V3 upgrades.
+    is_rhel_family() {
+        printf "%s\n" "$ID" "$ID_LIKE" | grep -Eq '\brhel\b|\bcentos\b|\bol\b|\balmalinux\b|\brocky\b|\bamzn\b' 2>/dev/null
+    }
+
+    INSTALLED_VERSION=""
+    INSTALLED_MAJOR=""
+    if command -v nginx-agent >/dev/null 2>&1; then
+        INSTALLED_VERSION=$(nginx-agent -v 2>/dev/null || true)
+        INSTALLED_MAJOR=$(printf "%s" "$INSTALLED_VERSION" | sed -n 's/^.*version v\([0-9]\+\).*$/\1/p' || true)
+    fi
+
+    AGENT_LIB_DIR=${AGENT_LIB_DIR:-"/var/lib/nginx-agent"}
+    AGENT_CONFIG_BACKUP="${AGENT_LIB_DIR}/nginx-agent.conf.preupgrade"
+
+    if is_rhel_family && [ -n "${INSTALLED_MAJOR}" ] && [ "${INSTALLED_MAJOR}" -eq 3 ] && [ -f "${AGENT_CONFIG_FILE}" ]; then
+        mkdir -p "${AGENT_LIB_DIR}" || true
+        if [ ! -f "${AGENT_CONFIG_BACKUP}" ]; then
+            echo "Backing up existing config to ${AGENT_CONFIG_BACKUP}"
+            cp -a "${AGENT_CONFIG_FILE}" "${AGENT_CONFIG_BACKUP}" || true
+        fi
+
+        # Also backup the manifest file
+        MANIFEST_BACKUP="${AGENT_LIB_DIR}/manifest.json.preupgrade"
+        if [ ! -f "${MANIFEST_BACKUP}" ] && [ -f "${AGENT_LIB_DIR}/manifest.json" ]; then
+            echo "Backing up existing manifest to ${MANIFEST_BACKUP}"
+            cp -a "${AGENT_LIB_DIR}/manifest.json" "${MANIFEST_BACKUP}" || true
+        fi
+
+        printf "%s" "${INSTALLED_VERSION}" > "${AGENT_LIB_DIR}/nginx-agent.preupgrade.version" 2>/dev/null || true
+    fi
+
+
     update_config_file
 }

test/docker/nginx-oss/rpm/Dockerfile

@@ -38,10 +38,10 @@ enabled=1" > /etc/yum.repos.d/nginx.repo; \
 
 
 RUN set -x \
-    && groupadd --system --gid 101 nginx \
-    && adduser -g nginx --system --no-create-home --home /nonexistent --shell /bin/false --uid 101 nginx \
-    && usermod -s /sbin/nologin nginx \
-    && usermod -L nginx \
+    && groupadd --system --gid 101 nginx 2>/dev/null || groupadd --system nginx \
+    && adduser -g nginx --system --no-create-home --home /nonexistent --shell /bin/false --uid 101 nginx 2>/dev/null || true \
+    && usermod -s /sbin/nologin nginx 2>/dev/null || true \
+    && usermod -L nginx 2>/dev/null || true \
     && yum install -y git \
                       wget \
                       procps \